Source-backed scope planning
How the basement calculator works
The model multiplies only the actual finishing area by Angi's $7–$23 per-square-foot reference, and only within the five-row demonstrated interval of 500–2,000 square feet. Exact rows remain validation benchmarks rather than duplicate cost lines.
User base quotes and separate trade quotes follow explicit inclusion and exclusion rules. Moisture, radon, combustion safety, permits, feature references, and concealed work never become silent multipliers.