Practitioner
HCD-approved modular ADUs
Factory-built ADUs that ship pre-permitted. The fastest delivery path under SB 1211.
HCD (the California Department of Housing and Community Development) maintains a list of pre-approved modular ADU designs. These ship from factory with most plan-check work already done; on-site permitting is often reduced to foundation, utility connections, and inspection.
Combined with SB 1211's ministerial review, HCD-approved modular is the fastest path from contract to occupancy — 90–120 days is achievable in best-case jurisdictions.
Get a personalized SB 1211 feasibility report
3 minutes. We email you a 4-page PDF with your buildable count, parking determination, jurisdiction overlays, and pro-forma.
No spam · free · delivered in 24 hrs
Related practitioner topics
SB 1211 ADU cost calculatorStick-built ADUs run $250-$450/sf in California. Factory-built drops that significantly.Financing multifamily ADUs under SB 1211Construction loans, refinances, and the new products emerging post-SB-1211.SB 1211 pro-forma walkthroughLand cost, construction, financing, rent, ROI for a typical multifamily ADU project.SB 1211: first steps for ownersA 5-step checklist from idea to feasibility study.Common SB 1211 mistakesSetback errors, parking miscounts, fire access misses. What to avoid.Appealing an SB 1211 denialCities have to approve compliant projects. Here's what to do if they don't.
How this topic plays in different cities
SB 1211 in Santa AnaOrange County · $2,400/moSB 1211 in Santa MonicaLos Angeles County · $3,500/moSB 1211 in Walnut CreekContra Costa County · $2,700/moSB 1211 in VenturaVentura County · $2,500/moSB 1211 in Redwood CitySan Mateo County · $3,000/moSB 1211 in NapaNapa County · $2,400/moSB 1211 in OceansideSan Diego County · $2,400/moSB 1211 in TorranceLos Angeles County · $2,500/moSB 1211 in FontanaSan Bernardino County · $1,900/moSB 1211 in Garden GroveOrange County · $2,400/moSB 1211 in BurbankLos Angeles County · $2,600/moSB 1211 in OntarioSan Bernardino County · $1,900/mo
By property type
Duplex2-unit · up to 3 new ADUsTriplex3-unit · up to 4 new ADUsFourplex / 4-unit4-unit · up to 5 new ADUs5-unit apartment5-unit · up to 6 new ADUs6-unit apartment6-unit · up to 7 new ADUs8-unit apartment8-unit · up to 10 new ADUs10-unit apartment10-unit · up to 10 new ADUs12-unit apartment12-unit · up to 11 new ADUs16-unit apartment16-unit · up to 12 new ADUs20-unit apartment20-unit · up to 13 new ADUs24-unit apartment24-unit · up to 14 new ADUs32-unit apartment32-unit · up to 16 new ADUs