Rough estimation system

Abstract

To provide a rough estimation system capable of easily grasping variation in amount of money when specifications of a region of a building are changed.SOLUTION: There is provided a rough estimation system 1 that roughly estimates the estimated amount of money for a planned object to be built, and the rough estimation system comprises: a basic information input part which can input basic information on the planned object (an operation input part 12 and an arithmetic part 22, step S21); a storage part which stores money amount information on objects having been estimated before and amount information on the objects (a server 20, steps S11 to S13 in Fig.4); a reference object search part which can search for reference objects as reference among the objects stored in the storage part in roughly estimating an estimated amount of the planned object (an arithmetic part 22, step S22); and an arithmetic part which can roughly estimate estimated amounts of the planned object, region by region, based upon the amount information on the searched reference objects and the basic information on the planned object (the arithmetic part 22, step S24).SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a technology for an estimation system that estimates the cost of a property that is planned to be built. [Background technology]

[0002] Conventionally, in order to quickly estimate (calculate) the estimated cost of a property for which construction is planned (planned property), there is a case where the estimated data of a property with similar conditions to the planned property is used as a reference, since there is little drawing information, etc., in the early design stage of the planned property. Patent Document 1 discloses a method for estimating the estimated cost of a planned property by referring to the estimated data of past properties.

[0003] However, estimate data for past properties often breaks down the cost by type of work (e.g., exterior wall painting, waterproofing, etc.). In this case, the cost of a part of a building (e.g., exterior walls) is spread across multiple types of work, which creates the problem that it is difficult to understand the change in cost when the design specifications of a part of the building are changed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2003-196369 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and the problem it aims to solve is to provide an estimation system that can easily grasp the fluctuations in cost when design changes are made to the specifications of parts of a building. [Means for solving the problem]

[0006] The problem to be solved by the present invention has been described above, and the means for solving this problem will now be described.

[0007] That is, in claim 1, there is provided an estimation system for estimating the estimated cost of a planned property whose construction is being planned, comprising a basic information input unit capable of inputting basic information about the planned property, a memory unit for storing properties with estimates and price information for said properties, a reference property search unit capable of searching for reference properties from the properties stored in the memory unit to use as a reference when estimating the estimated cost of the planned property, and a calculation unit capable of estimating the estimated cost of the planned property for each part of the building based on the price information of the searched reference properties and the basic information of the planned property.

[0008] In claim 2, the calculation unit is capable of converting price information by type of work for the reference object into price information by part using artificial intelligence.

[0009] In claim 3, the price information by part includes the material cost of that part and the cost required for the work on that part.

[0010] In claim 4, the basic information includes information on the area of ​​the planned property, and the calculation unit roughly estimates the estimated price of that part of the planned property by multiplying the unit price of that part per unit area of ​​the reference property by the area of ​​the planned property.

[0011] In claim 5, when there are multiple reference properties, the calculation unit uses the median of the unit prices of the parts per unit area of ​​the multiple reference properties as the unit price of the part per unit area of ​​the reference property.

[0012] In claim 6, the calculation unit is capable of correcting the roughly estimated price of the planned property based on at least one of the construction time and construction site of each of the planned property and the reference property.

[0013] In claim 7, the calculation unit is capable of estimating the estimated cost of the planned property using a plurality of the reference properties, and then re-estimating the estimated cost of the planned property for each part by excluding any of the plurality of the reference properties. Effect of the Invention

[0014] The present invention has the following advantages.

[0015] In claim 1, it is easy to grasp the change in price when the specifications of parts of a building are changed in design.

[0016] In claim 2, even if the input format of the price information of the object stored in the storage unit is not unified, the price information can be made for each part.

[0017] In claim 3, it is easier to grasp the change in price when the specifications of parts of a building are changed.

[0018] According to claim 4, the accuracy of the estimated price of the planned property can be improved.

[0019] According to claim 5, the accuracy of the estimated price of the planned property can be further improved.

[0020] According to claim 6, the accuracy of the estimated price of the planned property can be further improved.

[0021] According to claim 7, the accuracy of the estimated price of the planned property can be further improved. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a block diagram showing the configuration of an estimation system according to an embodiment of the present invention. [Diagram 2] (a) Block diagram showing the configuration of a user terminal. (b) Block diagram showing the configuration of a server. [Diagram 3]FIG. 13 is a diagram showing a business selection screen displayed on a display unit. [Figure 4] 11 is a flowchart showing a procedure for registering actual data of an estimated amount in a shared server. [Diagram 5] (a) Estimates by type of work. (b) Estimates by part. [Figure 6] A flow chart showing the steps for estimating the estimated cost of a planned property. [Figure 7] A diagram showing the basic information input screen for a planned property. [Figure 8] A diagram showing a property search screen. [Figure 9] A diagram showing the search results screen (list of searched properties). [Figure 10] A diagram showing the search results screen (graph). [Figure 11] A diagram showing the property details screen. [Figure 12] A diagram showing the approximate results screen. [Figure 13] A diagram showing the screen for adjusting the price per square meter for exterior walls. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] The configuration of an estimation system 1 according to one embodiment of the present invention will be described below with reference to FIG.

[0024] The estimation system 1 is a system for estimating (calculating) the estimated cost of a property (building) whose construction is planned (scheduled) (hereinafter referred to as the "planned property"). The estimation system 1 searches for properties similar to the planned property from properties with estimates, and estimates the estimated cost of the planned property based on those properties. The estimation system 1 mainly comprises a user terminal 10 and a server 20.

[0025] The user terminal 10 is a terminal used by a user. The user is, for example, an estimator. The user terminal 10 is used, for example, when registering actual data on the estimated amount in the server 20 described later, and when roughly calculating the estimated amount of a planned property. A personal computer or the like can be used as the user terminal 10.

[0026] The server 20 is connected to each user terminal 10 via a network N. The network N includes a public network such as the Internet, a wireless network such as a mobile phone network, a LAN (Local Area Network), and the like.

[0027] 2(a), the configuration of the user terminal 10 will be described. The user terminal 10 includes a communication unit 11, an operation input unit 12, and a display unit 13.

[0028] The communication unit 11 is a part that communicates with the server 20. The communication unit 11 can transmit to the server 20 the result data of the estimated amount inputted at the user terminal 10.

[0029] The operation input unit 12 is a part where various information is input and searched for by user operation. A keyboard, a mouse, etc. are used as the operation input unit 12. The user can input and search for information using the operation input unit 12. The user can use the operation input unit 12 to input, for example, basic information about a planned property.

[0030] The display unit 13 displays images. For example, a display device such as a liquid crystal display is used as the display unit 13. The display unit 13 can display various screens for registering actual data on the estimated amount, and various screens for estimating the estimated amount of a planned property. For example, the display unit 13 can display a business selection screen shown in FIG. 3, a basic information input screen shown in FIG. 7, a property search screen shown in FIG. 8, a search result screen (list of searched properties) shown in FIG. 9, and a search result screen (graph) shown in FIG. 10.

[0031] 2(b), the configuration of the server 20 will be described. The server 20 includes a storage unit 21 and a calculation unit 22.

[0032] The storage unit 21 stores various data. The storage unit 21 can store actual data on estimated amounts and basic information on planned properties transmitted from the user terminal 10 via the communication unit 11. The storage unit 21 can also store data (details of which will be described later) in which actual data on estimated amounts is converted by part. The storage unit 21 can also store data on the rough estimate results of estimated amounts for planned properties.

[0033] The calculation unit 22 is a part that performs various calculations. When the actual data of the estimated amount is stored in the memory unit 21, the calculation unit 22 converts the actual data by part (links the estimated amount by part). In addition, the calculation unit 22 can roughly calculate the estimated amount of the planned property based on the basic information of the planned property stored in the memory unit 21 and the actual data of the estimated amount.

[0034] In the estimation system 1 configured in this manner, a property (hereinafter referred to as a "reference property") to be used as a reference for estimating the estimated amount of the planned property can be searched for from the actual data of estimated amounts stored in the server 20, and the estimated amount of the planned property can be estimated based on the reference property.

[0035] When a user launches a specific program in the estimation system 1, a task selection screen is displayed on the display unit 13 (see FIG. 3). On the task selection screen, words (buttons) such as "data registration" and "approximate estimate amount" are displayed. When registering actual data for the estimated amount, the user clicks on the words "data registration". When estimating the estimated amount for a planned property, the user clicks on the words "approximate estimate amount".

[0036] The procedure for registering actual data on estimated amounts will be described below mainly with reference to FIG.

[0037] First, in step S11, actual data on the estimated amount is input. Specifically, when the user clicks on the word “data registration” on the business selection screen (see FIG. 3), a screen (not shown) for inputting actual data on the estimated amount, etc. is displayed on the display unit 13.

[0038] A user can load drawing data of a property for which an estimate has been made. The drawing data is stored in the memory unit 21 of the server 20 via the communication unit 11. The calculation unit 22 can obtain information such as the construction site and building use of the property from the drawing data. In addition, a user can input past data on the estimated amount on the screen. The calculation unit 22 can obtain the estimated amount from the past data on the estimated amount.

[0039] Here, as shown in Figure 5(a), estimates for past properties may be classified (divided) by type of work. For example, for structural work, the amount is divided by type of work, such as direct temporary work, concrete work, steel frame work, and fireproof coating work. Also, for finishing work, the amount is divided by type of work, such as masonry work, waterproofing work, roofing work, exterior work, plastering work, painting work, and interior work. The estimate for each type of work includes, for example, the cost of materials for each member used in the work, the cost required for the work, etc. (not shown).

[0040] When the estimated cost is divided by type of work in this way, the cost for one part of a building is spread across multiple types of work. For example, among the costs for "exterior walls with an ALC painted finish," the material cost for the ALC panels is included in "masonry work," the cost for the paint finish is included in "painting work," the cost for the mortar base around openings is included in "plastering work," and the cost for sealing around openings is included in "waterproofing work." In this way, the cost for one "part" is spread across multiple "types of work."

[0041] In step S12, when the actual data of the estimated amount input in step S11 is divided by work type, the calculation unit 22 creates amount information by part by converting the amount information by work type (see FIG. 5(b)). For example, for the structural work, the amount is divided by part such as direct temporary structure, underground structural body, first floor, above-ground structural body, and fireproof coating. For the finishing work, the amount is divided by part such as roof, exterior floor, exterior wall, exterior ceiling, balcony, fittings, interior floor, interior wall, and interior ceiling. In addition, the estimate for each part includes, for example, the material cost of the part, the cost required for the work of the part (cost of materials and labor costs required for the work required for the construction of the part, etc.), etc. For example, the cost for "exterior wall with ALC panel paint finish" includes the material cost of the ALC panel, the cost required for the paint finish, the material cost of the mortar base around the opening and the cost of plastering work, the material cost of the sealing around the opening and the cost of waterproofing work, etc.

[0042] Here, since the items of the estimate by type shown in Fig. 5(a) are input by various people, the input format may not be unified. For this reason, the calculation unit 22 uses AI (artificial intelligence) to determine which part the item of the estimate by type of work corresponds to, and converts the amount information by type of work into amount information by part.

[0043] In step S13, the calculation unit 22 stores the amount information in the memory unit 21 of the server 20. Specifically, the calculation unit 22 stores the actual data of the estimated amount as amount information by work type and amount information by part in the memory unit 21 of the server 20. In this way, the actual data of the estimated amounts of a plurality of objects is accumulated in the memory unit 21 of the server 20.

[0044] Based on the learning results, the AI ​​converts (allocates) the price information of the reference property by part. Specifically, data that the user converted into parts in advance is stored in the memory unit 21, and the AI ​​converts into parts by referring to that data. The user can also check and correct specific items to ensure that the conversion into parts by the AI ​​is correct, and the correction results are stored in the memory unit 21. In this way, the accuracy of the AI's judgments is improved.

[0045] Below, we will mainly use Figure 6 to explain the procedure for estimating the estimated cost of a planned property.

[0046] First, in step S21, basic information about the planned property is input. Specifically, when the user clicks on the words "Estimated Estimated Amount" on the business selection screen (see FIG. 3), the basic information input screen shown in FIG. 7 is displayed on the display unit 13. The basic information includes, for example, information such as the estimate name, construction site (construction city), total floor area, building area, construction area, exterior wall area, and exterior structure area.

[0047] The user inputs basic information such as the construction site and total floor area of ​​the planned property on the basic information input screen shown in Fig. 7 via the operation input unit 12. When the user has finished inputting the basic information of the planned property, he / she clicks the "Next" icon. When the "Next" icon is clicked, a property search screen (search condition input screen) shown in Fig. 8 is displayed on the display unit 13.

[0048] Next, in step S22, the calculation unit 22 determines a correction coefficient for the estimated amount based on the estimate time and construction site of the planned property. Specifically, the calculation unit 22 can determine the standard for the correction coefficient based on the estimate time and construction site of the planned property input in step S21. This allows the calculation unit 22 to set the correction coefficient for the planned property to "1" and determine the correction coefficient for the reference property, which will be described later.

[0049] More specifically, the correction coefficient for the estimated amount is determined using, for example, the "construction year index" and the "city disparity index" published by the Construction Price Research Institute. Here, the "construction year index" is a type of price index that allows the trend of construction prices for buildings to be grasped. Also, the "city disparity index" is an index that shows the price difference between the 10 major cities, with the Tokyo 23 wards set as 100. The correction coefficient for the estimated amount is determined based on the construction year index and the city disparity index. Note that the correction coefficient for the estimated amount may be determined based on either the construction year index or the city disparity index.

[0050] Next, in step S23, a property search is performed. Specifically, the user uses the property search screen shown in FIG. 8 to search for properties with similar conditions to the planned property, in order to use the property as a reference when estimating the estimated cost of the planned property. The property search screen shown in FIG. 8 displays tabs for property information, area, height, etc. For example, when the "Property Information" tab is clicked, various search conditions related to property information are displayed. Search conditions related to property information include, for example, tenant name, number of above-ground floors, legal structure, building use, etc.

[0051] The user inputs various search conditions on the property search screen shown in FIG. 8 so as to match the conditions of the planned property. For example, the user inputs "reinforced concrete construction" as a search condition for legal structure. The user also inputs "nursing care facility" as a search condition for construction use. After the user has finished inputting the search conditions, he or she clicks the "Search" icon. When the "Search" icon is clicked, the calculation unit 22 searches for properties that meet the input conditions from among the properties stored in the memory unit 21. Then, the search result screen shown in FIG. 9 and FIG. 10 is displayed on the display unit 13.

[0052] A list of the searched properties (i.e. properties that match the conditions of the planned property) is displayed on the search result screen shown in Fig. 9. Specifically, the search result screen shown in Fig. 9 displays the construction number, construction name, construction site, month of order receipt, number of above-ground floors, maximum height, building use, etc. of each of the searched properties.

[0053] Furthermore, the search result screen shown in FIG. 10 displays a graph (scatter plot) showing the relationship between the total floor area of ​​each searched property and the total price per tsubo (the sum of the prices per tsubo for each part). This allows the trend of the total floor area and total price per tsubo of the reference property to be confirmed. The total price per tsubo displayed is the amount corrected using the correction coefficient (see step S22). This allows the user to compare and consider the proposed property while matching conditions such as construction time and construction location with those of the planned property.

[0054] The construction numbers in the search property list shown in Fig. 9 and the points (shown by black circles) in the graph shown in Fig. 10 are linked to a detailed property information screen. When the user clicks on the construction number or point, the property details screen shown in Fig. 11 is displayed on the display unit 13.

[0055] The property details screen shown in FIG. 11 displays tabs such as property overview, price per tsubo, estimate data, and drawings. For example, when the "Property Overview" tab is clicked, basic information about the property, building information, area, structure, etc. are displayed. Basic information includes, for example, the construction number and construction site. Building information includes, for example, the legal structure and building use. Area includes, for example, the building area and total floor area. Structure includes, for example, the fire-resistant coating specifications and foundation type. This allows the user to know detailed information about the searched property.

[0056] In addition, when the "price per tsubo" tab is clicked, the price per tsubo by work type and by part of the property is displayed. The "price per tsubo by work type" is the amount of the work type per unit area (1 tsubo) of the property. The "price per tsubo by part" is the amount of the part per unit area (1 tsubo) of the property. The "price per tsubo by part" is calculated by dividing the amount (e.g., 1 million yen) of the part of the reference property (e.g., the exterior wall) by the total area (e.g., 50 tsubo) of the reference property (20,000 yen / tsubo). In addition, on the property details screen, the price per tsubo can be changed to various area-based prices other than the total area by clicking the "area switching" icon. For example, in the case of the price per tsubo of the exterior wall, the price per tsubo based on the "exterior wall area" can be used instead of the "total area". Both the price per tsubo at the time of data registration of the reference property (price before correction) and the amount after correction using the correction coefficient (see step S22) are displayed.

[0057] Clicking the "Estimate Data" tab displays the contents of the estimate for the property, and clicking the "Drawings" tab displays the floor plan and structural drawings for the property.

[0058] Next, in step S24, the user selects a reference property from the searched properties on the search result screen shown in FIG. 9 to use as a reference for estimating the estimated cost of the planned property. The user can decide on a reference property by checking the property summary, price per square meter, estimated data, and drawings (particularly the property summary). The user checks the property they want to use as a reference property from the list of searched properties and clicks the "Add" icon. This causes the selected property to be stored in the "List of selected properties." When the user has finished selecting reference properties, he or she clicks the "Next" icon.

[0059] When the "Next" icon is clicked, the calculation unit 22 calculates the estimated price of the planned property (step S25). The calculation unit 22 calculates the estimated price for each part of the planned property based on the price per tsubo for each part of the reference property and the basic information of the planned property (see step S21). Specifically, the calculation unit 22 can calculate the estimated price (2 x 40 = 800,000 yen) for a part of the planned property (e.g., an exterior wall) by multiplying the median price per tsubo (e.g., 20,000 yen) of the selected part of the reference property (e.g., an exterior wall) by the total floor area (e.g., 132 tsubo). By calculating the estimated price for each part of the planned property in this way, the estimated price for the entire planned property can be calculated.

[0060] Next, in step S26, the estimated result screen shown in Fig. 12 is displayed on the display unit 13. In the estimated result screen shown in Fig. 12, the estimated amount after correction of the planned property using the correction coefficient determined in step S22 is displayed by part. In this way, the user can understand the estimated amount of the planned property.

[0061] In addition, the estimated cost for each part can be modified. FIG. 13 shows a screen for modifying the unit price per tsubo for the exterior wall (part). In the screen shown in FIG. 13, the standard of "unit price per tsubo" and "area" used for estimating the estimated cost can be switched. Specifically, in the screen shown in FIG. 13, the average, median, maximum, and minimum values ​​of the unit price per tsubo for the exterior wall of the reference property are displayed, and by selecting either the average, median, maximum, or minimum value, the estimated cost of the exterior wall can be re-estimated based on the selected unit price per tsubo. In addition, in the screen shown in FIG. 13, the total floor area, building area, construction area, exterior wall area, and exterior area of ​​the exterior wall of the planned property are displayed, and by selecting either the total floor area, building area, construction area, exterior wall area, or exterior area, the estimated cost of the exterior wall can be re-estimated based on the selected area. In this way, by switching the standard value of the unit price per tsubo for each part of the reference property and the type of area of ​​the planned property, the estimated cost can be adjusted for each part, and the accuracy of the estimated result of the estimated cost can be improved.

[0062] In addition, the bottom of the screen shown in Fig. 13 displays the construction number, construction name, cost information, etc. of each reference property used to estimate the estimated amount. By unchecking any reference property that is considered difficult to use as a reference, the estimated amount can be re-estimated excluding the unchecked reference property (based only on the checked reference properties). This can improve the accuracy of the estimated amount.

[0063] As described above, the estimation system 1 according to this embodiment can automatically estimate the price of a planned property based on past similar cases, which can speed up the estimation process (shorten the time required for the estimation process). In addition, by standardizing the estimation method, it is possible to present estimation results that are not influenced by the experience of the estimator.

[0064] Furthermore, the estimation system 1 can present the estimated cost of a planned property in an easy-to-understand price structure for each part, which can deepen the understanding of property managers other than the estimator and clients. Also, if there are changes in specifications after the estimation, it is easy to reflect the change in the amount. In other words, for example, when the design of the exterior wall specifications is changed, the change in the amount can be easily understood by referring to the estimated amount for the exterior wall.

[0065] In addition, because the property price information required to roughly estimate the estimated price of the planned property is managed in a centralized manner in the server 20, the user can reduce the effort of searching for properties similar to the planned property when estimating the estimated price. In addition, for properties stored in the server 20, the information required to roughly estimate the estimated price is summarized in the "Property Overview" on the property details screen shown in Figure 11, so it is easy to determine whether or not the property can be used as a reference property.

[0066] As described above, the estimation system 1 according to this embodiment has the following features: An estimation system 1 for estimating the estimated cost of a planned property for which construction is planned, A basic information input unit (operation input unit 12 and calculation unit 22, step S21 in FIG. 6) capable of inputting basic information about the planned property; A storage unit (server 20, steps S11 to S13 in FIG. 4) that stores properties for which estimates have been made and price information for the properties; a reference property search unit (calculation unit 22, step S22 in FIG. 6) capable of searching for a reference property to be used as a reference when estimating the estimated price of the planned property from the properties stored in the storage unit; A calculation unit (calculation unit 22, step S24 in FIG. 6) capable of roughly estimating the estimated price of the planned property for each part of the building based on the price information of the reference property and the basic information of the planned property that have been searched for; It is equipped with the following.

[0067] With this configuration, it is possible to easily grasp the change in price when the specifications of parts of a building are changed in design.

[0068] In addition, the calculation unit (calculation unit 22) Using artificial intelligence, it is possible to convert the price information for each type of work for the reference property into price information for each part.

[0069] With this configuration, even if the input format of the price information of the object stored in the server 20 is not standardized, the price information can be made for each part.

[0070] The price information for each part includes the material cost for that part and the cost required for the work on that part.

[0071] With this configuration, it is easier to understand the change in price when the specifications of parts of a building are changed.

[0072] In addition, the basic information includes information on the area of ​​the planned property, The calculation unit (calculation unit 22) The estimated price for that part of the planned property is calculated by multiplying the unit price per unit area of ​​the reference property by the area of ​​the planned property.

[0073] With this configuration, the accuracy of the estimated cost of the planned property can be improved.

[0074] In addition, the calculation unit (calculation unit 22) When there are multiple reference properties, the median of the unit prices of the parts per unit area of ​​the multiple reference properties is used as the unit price of the parts per unit area of ​​the reference property.

[0075] With this configuration, the accuracy of the estimated cost of the planned property can be further improved.

[0076] In addition, the calculation unit (calculation unit 22) The estimated price of the planned property can be adjusted based on at least one of the construction dates or construction locations of the planned property and the reference property.

[0077] With this configuration, the accuracy of the estimated cost of the planned property can be improved.

[0078] In addition, the calculation unit (calculation unit 22) After estimating the estimated cost of the planned property using a plurality of the reference properties, it is possible to exclude any one of the plurality of reference properties and re-estimate the estimated cost of the planned property for each part.

[0079] With this configuration, the accuracy of the estimated cost of the planned property can be improved.

[0080] Although the embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0081] For example, the various screens (FIGS. 3, 7 to 13) in this embodiment are merely examples, and the display contents and layouts can be changed as appropriate.

[0082] In addition, in this embodiment, when estimating the estimated price of the planned property (step S25), the median price per tsubo of the parts of the reference property is used, but the average, maximum or minimum price per tsubo may also be used. Also, it may be possible to switch which value to use from the median, average, maximum or minimum price per tsubo of the parts of the reference property. Also, it may be possible to allow the user to manually input the price per tsubo of the parts of the reference property. [Explanation of symbols]

[0083] 1 Estimation System 12 Operation input section 13 Arithmetic section 20 Servers

Claims

1. An estimation system for estimating the estimated cost of a property for which construction is planned, A basic information input unit capable of inputting basic information about the planned property; A storage unit that stores properties for which estimates have been made and price information for the properties; a reference property search unit capable of searching for a reference property to be used as a reference when estimating the estimated price of the planned property from among the properties stored in the storage unit; a calculation unit capable of roughly estimating the estimated price of the planned property for each part of a building based on the searched price information of the reference property and basic information of the planned property; Equipped with Estimation system.

2. The calculation unit is Using artificial intelligence, the price information by type of work for the reference object can be converted into price information by part. The estimation system according to claim 1 .

3. The cost information for each part includes the cost of materials for that part and the cost required for the work for that part. The estimation system according to claim 1 .

4. The basic information includes information on the area of ​​the planned property, The calculation unit is Estimate the estimated price of the part of the planned property by multiplying the unit price per unit area of ​​the reference property by the area of ​​the planned property; The estimation system according to claim 1 .

5. The calculation unit is If there are multiple reference properties, the median of the unit prices per unit area of ​​the multiple reference properties is used as the unit price per unit area of ​​the reference property. The estimation system according to claim 4.

6. The calculation unit is The estimated price of the planned property can be adjusted based on at least one of the construction time and construction location of the planned property and the reference property. The estimation system according to any one of claims 1 to 5.

7. The calculation unit is After estimating the estimated cost of the planned property using a plurality of the reference properties, it is possible to exclude any of the plurality of the reference properties and re-estimate the estimated cost of the planned property for each portion. The estimation system according to any one of claims 1 to 5.

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