by SaggezzaTrends / prototype
How have material costs changed?
The NCMPI follows a fixed basket of eight building materials, not the total cost of an entire building.
268.0 in 2026
100 means the basket’s 2023 base cost. 200 means double that base cost. 268 means 2.68 times the base cost: +168%, not a 168% increase in all construction costs.
NCMPI
Prototype, not an official NBS series. Paint and Timber values are carried from 2021; some historical inputs use nearest-period substitutes.
Explore basket weights and advanced drivers
50%
cement + steel
- Cement28%
- Reinforcement steel22%
- 9-inch blocks12%
- Sharp sand10%
- Granite10%
- Roofing8%
- Paint5%
- Timber5%
Cement: 28%
Reinforcement steel: 22%
9-inch blocks: 12%
Sharp sand: 10%
Granite: 10%
Roofing: 8%
Paint: 5%
Timber: 5%