1build
Live construction cost database with 68M priced items across every US county; estimating and digital takeoff platform for residential contractors.
Also in Companies -- Strategic (Nemetschek Group, Masco Corporation, Initialized Capital, Afore Capital, Y Combinator, Greycroft)
3.2 /5 composite score
C2 5/5 reflects the public GraphQL API with API-key auth, and the file surface covers JSON and CSV. The estimating placement is a county-level cost-data and digital-takeoff workflow for residential contractors; firm-size fit is solo to small-team.
Solid
Rubric Scorecard
| Criterion | Score | Evidence |
|---|---|---|
| Value for the price | 2/5 | Freemium, free tier Source → |
| Agent Friendliness | 5/5 | API: https://developer.1build.com/ Source → |
| Ease of adoption | 3/5 | -- |
| Portability & lock-in | 3/5 | 2 file formats Source → |
| Interoperability | 3/5 | 3 integrations |
Pricing
ModelFreemium
Free tieryes
Published by buildingtech.pro. How we verified this: we checked 1build against its live site and an independent source — forconstructionpros.com. Nothing on this page is listed from memory. See how we grade. Verified 2026-07-18.
Evidence
File formats
| Format | Direction | Support |
|---|---|---|
| JSON | unknown | unknown |
| CSV | unknown | unknown |
Integrations
STACK Construction Buildxact CostCertified
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