BT01 2021 – National Building Index (all trades)

The BT01 2021 index is France’s national construction index (all trades).

It measures changes in the cost of factors of production in the building industry and is the official reference for updating and revising construction contract prices.

The Index was created by a decree published in the Official Journal on December 20, 2014 (base 100 = 2010 average) and is published monthly by INSEE. It thus succeeds the Index of Building and Public Works (bases 1974 and 1975), which has been discontinued.

Download the latest official values of the BT01 2021 index
BT01 2021 index Evolution

Below is the table of BT01 index values for the year 2021:

BT01 index values history in 2021

Period

Index value

Variation in % / previous month

Variation in % / December of the previous year

Index evolution in % over 12 months

Index evolution in % over two years

January 2021

114.4

+0.70%

+0.70%

+2.33%

+3.91%

February 2021

115.2

+0.70%

+1.41%

+3.04%

+4.44%

March 2021

116.1

+0.78%

+2.20%

+3.94%

+4.97%

April 2021

116.3

+0.17%

+2.38%

+ 4.30%

+ 4.87%

May 2021

116.6

+0.26%

+2.64%

+ 4.39%

+ 5.05%

June 2021

117.5

+0.77%

+3.43%

+4.91%

+5.67%

July 2021

118.5

+0.85%

+4.31%

+5.61%

+6.56%

August 2021

118.5

Unchanged

+4.31%

+5.33%

+6.18%

September 2021

118.6

+0.08%

+4.40%

+5.05%

+6.46%

October 2021

119.1

+0.42%

+4.84%

+5.49%

+6.91%

November 2021

119.5

+0.34%

+5.19%

+5.57%

+7.37%

December 2021

119.7

+0.17%

+5.37%

+5.37%

+7.26%

Use of the BT01 2021 index:

Rule:

The price of the service of the contract of services will be revised at each expiry of the agreement according to a formula that integrates the evolution of the BT01 Index.

Formula:

[New price] = [old price] X [Known reference index BT01] / [Reference index BT01]

Attention, do not confuse the BT01 Index with the “Construction Index” or the “Rent Reference Index“, used respectively to revise rents for private individuals and leases for professionals. The values in this table will be updated at the rate of the publication of the Index during the year 2021.

Find our page with the history of the BT01 Index, the national building index (all trades), and the table of BT01 index values in 2022.

Pascal
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