Free Tools
Free tools for California builders, architects, and developers. Check your project against city-specific codes before you submit.
Featured Tool
Pre-submission building code review. Enter your project details — setbacks, height, coverage, parking — and get a compliance report showing what a plan checker will flag before you submit.
Quick reference for California city building codes. Zone requirements, setback tables, height limits, parking ratios, and common plan check flags — organized by city.
Look up any California property by address. See parcel details, APN, county, and what California law lets you build — ADU eligibility, SB 9 lot split potential, and development scenarios.
Enter your lot dimensions and zone — see your buildable envelope, max footprint, and lot coverage.
Check if your property qualifies for an ADU — detached, JADU, garage conversion, or multiple units under SB 1211.
Calculate required parking spaces — main units, ADU, and guest parking with transit exemptions.
Check your floor area ratio against city limits — see remaining buildable sqft before you design.
Setback tables, height limits, lot coverage, parking ratios, and common plan check flags by city.