France building index BT50: renovation and maintenance
France building index BT50: renovation and maintenance stood at 141.5 in Aug 2026, according to INSEE – Institut national de la statistique et des études économiques (BDM). It is one of the indicators in the Construction cost indices table (Value · Monthly), with a complete series running from Oct 2014 to Aug 2026. The complete series with an interactive chart, free to download.
This indicator in the Construction cost indices table
| Indicator | 08-2026 | 07-2026 | 06-2026 | 05-2026 | 04-2026 | 03-2026 | 02-2026 | 01-2026 | 12-2025 | 11-2025 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Building index - BT50 - Renovation - All trades maintenance - Base 2010 | 141.5 | 140.8 | 140.2 | 140 | 139.6 | 138.5 | 137.7 | 137.3 | 136.4 | 136.1 | |
| Building index - BT51 - PVC joinery - Base 2010 | 136.1 | 136.7 | 136 | 134.8 | 134.8 | 133.8 | 132.7 | 132.4 | 133.5 | 132.3 | |
| Building index - BT52 - Exterior waterproofing coatings - Base 2010 | 150.5 | 149.9 | 150.1 | 151.6 | 150.8 | 142.8 | 140.5 | 140.3 | 139.5 | 139.6 |
Understanding france building index BT50: renovation and maintenance
All-trades maintenance and renovation works across existing structures are monitored by this broad indicator, capturing aggregated price shifts for multi-trade repair operations rather than single-specialty installations. Unlike specialized sibling series that isolate roofing, plumbing, or electrical components individually, this metric averages out cost movements across a diverse mix of trades engaged in upkeep and modernization projects. It encompasses standard material inputs, repair supplies, and associated trade labor components typically billed during building restoration, while excluding new construction structural additions and heavy civil engineering projects.
Evaluating this index effectively requires recognizing that multi-trade averages blend divergent sectoral cost pressures, meaning individual sub-contract price spikes can be masked by stable segments. Period-on-period changes often exhibit stability due to the wide basket of trades, but twelve-month spans provide a clearer picture of sustained inflation in the repair sector. Early monthly releases are routinely adjusted as participating trade firms submit delayed pricing returns. Users must avoid conflating this maintenance measure with new construction cost indexes, as repair work involves different labor efficiencies, demolition requirements, and material sourcing logistics.
Frequently asked questions
- How does this series differ from single-trade indices like roofing or electrical measures?
- It averages price movements across multiple trades involved in upkeep rather than focusing on a single specialized material.
- Does this index cover newly constructed buildings or extensions?
- No, new construction works are excluded, as the series focuses exclusively on maintenance and renovation of existing structures.
- Why might monthly figures for this index appear muted compared to specialized metrics?
- The broad basket of multiple trades helps smooth out sharp price swings that occur in isolated commodity sectors.