Add up to 8 detached ADUs to your multifamily property.
California's SB 1211 just rewrote the math on multifamily ROI. We build the units that make it pencil.
The math on multifamily ADUs just changed overnight.
Before SB 1211
- Maximum 2 detached ADUs per multifamily property
- Replacement parking often required by jurisdictions
- Discretionary review possible — public hearings, delays
- Inconsistent application of HCD impact fee waivers
After SB 1211 — effective Jan 1, 2025
- Up to 8 detached ADUs (capped at existing unit count)
- No parking replacement required by local jurisdictions
- Ministerial 60-day approval — no public hearings
- Predictable, statewide standards
If you own a fourplex, you can add up to 4 detached ADUs. A sixplex unlocks 6. An 8-unit-or-larger property unlocks the full 8. And the lots most likely to pencil are properties with significant surface parking — the parking-replacement waiver is the practical change that makes the project bankable.
Source: California SB 1211 (2023–2024 session). Read the bill text
A note on prefab: SB 1211 covers ADUs under CA Gov Code § 65852.2. Modular (CBC-code) is plan-checked as site-built. Manufactured (HUD-code) is also eligible when installed on a permanent foundation per HCD Form 433A, though many jurisdictions add design-compatibility standards. See the comparison
The unit economics on a property you already own.
All figures illustrative. Rent and ROI ranges sourced from CA market data and Clever Builds installed projects. Get a property-specific feasibility analysis to see what your lot supports.
Tell us about your property. We'll send back the math.
Move the sliders to model your specific scenario, then request a property-specific feasibility analysis from our team.
Run the SB 1211 math
Tune the inputs to your property. Defaults reflect typical California multifamily assumptions.
Advanced financing assumptions
Building 4 Clever Elements ADUs on a 4-unit lot.
Illustrative only — actual results depend on your specific market, unit mix, and site conditions. SB 1211 caps detached ADUs at the number of existing units on the lot, up to 8. Rent and cost assumptions sourced from CA market data and Clever Builds installed projects. Get a property-specific feasibility analysis below.
Pre-engineered for the SB 1211 lot.
Built and ready to install — units arrive fully finished, install via crane in a single day per unit. Compact footprints with no wasted square footage, designed specifically for the constraints of multifamily surface-parking infill.
Block A
One full 2-story unit. Efficient for adding 1–4 ADUs to a small multifamily lot.
View Block ABlock A+A
Two Block A units mirrored. Double the unit count on the same install footprint.
View Block A+ACustom configurations
Combine Blocks A, B, and C to build the unit count and mix your project needs.
Configure your projectFrom your first email to your first lease-up.
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1
Free feasibility analysis
5 business daysYou send us your property; we send back unit count, installed budget, and projected rents.
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2
Schematic design & entitlement strategy
2–4 weeksOur in-house architecture team designs the site plan and units. We map out your permitting path.
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3
Permit submittal
60-day ministerial approvalWe submit. SB 1211 requires ministerial approval — no public hearings.
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4
Factory build
12 weeksBuilt in our 85,000 sq ft Ensenada factory. Track progress in your customer portal.
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5
Site prep & foundations
Parallel to factory buildYour CA install partner pours foundations, runs utilities, preps the site.
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6
Crane install + finishes
1–2 weeksUnits arrive on flatbed, install via crane in a single day per unit.
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7
Final inspection & lease-up
Timeline variesLocal jurisdiction signs off; you start showing units.
Designs that make your tenants go "wow." Durability that leaves your repair guy without a job.
The questions multifamily owners ask first.
No FAQs published yet. Add them in Admin → FAQs (Clever Builds brand, set active).
Send us your property. We'll send back the math.
You'll get a PDF feasibility analysis — eligible unit count, estimated installed budget, projected gross rents — within five business days. Free, no commitment.
- Eligible ADU count under SB 1211
- Installed budget estimate by configuration
- Projected gross rents and cash-on-cash
- Notes on jurisdiction quirks
Or call us directly: (888) 301-2088
Sources: California SB 1211 bill text — California Legislative Information; HCD Factory-Built Housing program — California Department of Housing and Community Development; industry analyses from Abodu, JDJ Consulting, Villa Homes, and OpenScope Studio. Rent figures reflect typical California submarkets; verify with local comps for your specific property.