Construction Estimation Information

City of Yokohama, Housing and Architecture Bureau has formulated guidelines for estimating construction costs for other than housing construction, referring to the Ministry of Land, Infrastructure, Transport and Tourism's "Standards for estimating public building construction costs" and "Standards for estimating public building construction costs." In addition, in Yokohama City, construction costs are estimated using the repair and repair estimation system (RIBC2).

（１） Periodic revision
　Price materials The unit price (material unit price / market unit price) and the combined unit price based on common steps across the country are periodically maintained. ※I will revise it.
　※In principle, four times a year (April, July, October, January)

（２） Temporary revision
　Main material unit price ※It will be revised every month for the time being.
　※The main material unit price is the unit price of materials set by Yokohama City as the main material from reinforcing bars, concrete, steel frames, and steel scraps.
　It is based on “Monthly Construction Prices” and “Monthly Estimated Data” that are commercially available by the Price Research Committee and the Economic Research Committee.
　We can read list of main materials in citizen information center.

（３） Material unit price
　The unit price of materials is the price of "Monthly Construction Prices" and "Monthly Estimated Data" which are commercially available from the Construction Price Survey Committee and the Economic Research Committee.
　It depends.
　The unit price of materials set based on the actual transaction price of the market can be viewed at the Citizen Information Center by Yokohama City, entrusted to a price survey organization and conducted by itself.
　Sir. In addition, it is published in “Monthly Construction Prices” and “Monthly Estimated Data” which are commercially available from the Construction Price Survey Committee and the Economic Research Committee.
　Prices are not listed.

（４） Market unit price
　The market unit price is the price of "Building cost information" and "Building construction unit price" that are commercially available from the Construction Price Survey Committee and the Economic Research Committee.
　It depends.

（５） Labor unit price
　Labor unit price depends on the unit price of public construction design labor set in Yokohama City.
　For the labor unit price, please refer to the public construction design labor unit price table on the “Civil engineering design and construction related materials” on the Road and Highway Bureau website of Motoichi.

The following estimation procedures and estimation manuals are published in PDF file.

Estimation Procedure, Estimation Manual

Estimation Procedure, Estimation Manual	Number of pages
Building construction cost estimation guidelines (revised in July 2024) (PDF: 843KB)	34
Electrical Equipment Construction Estimation Guidelines (revised in July 2024) (PDF: 438KB)	45
Guidelines for Estimation of Machinery and Equipment Construction (revised in July 2024) (PDF: 1,549KB)	76
Building construction cost estimation manual (revised in July 2024) (PDF: 1,444KB)	90

※The July 2023 edition is listed below.
・Estimation point (building work (PDF: 787KB) Electrical equipment work (PDF: 452KB) Machinery and equipment work (PDF: 2,275KB))

The repair and repair estimation system is a system that uses a personal computer to estimate the construction cost of public buildings. This system was developed by the Institute for Building Cost Management System, and is currently introduced by many local governments, including the government, and can be used by design offices and construction companies by rental. . However, it is necessary to maintain data that has not been published by the national or local government, among the accumulated data such as material unit prices and steps.
In Yokohama City, construction costs are estimated using this system. Specifically, please refer to homepage (outside site) of Building Cost Management System Research Institute.

About construction design book which we can download from door (outside site) of Yokohama, bid, we assume only PDF file according to the whole city handling after June 1, 2013. When converting to Excel, software such as Adobe Acrobat is required separately.

About estimate breakdown of construction, "bid, contract result details (construction)" of Motoichi homepage "Yokohama bid door" from item performing public notice and nomination notice newly after October 5, 2021 We announce. [It is 3 months from the day after the contract decision date. ]