Single-Family Residential · LAMC Title 12
R1 Zoning
Los Angeles
R1 — One-Family Dwelling Zone. 1 primary dwelling per lot. SB 9 (2021) allows a second unit and/or urban lot split on most R1 parcels, and California ADU law adds an ADU + JADU. On a 7,500 sq ft lot this allows approximately 2 units by-right, rising to roughly 3 units with a TOC Tier 4 bonus. Typical use: Single-family homes, SB 9 duplex conversions, ADU additions.
Free Parcel Zoning ReportUnit Math
2 units typical ceiling by-right (house + SB 9 second unit), plus ADU/JADU under state law
Example: 7,500 sq ft lot → 2 units by-right
R1 is where SB 9 lot splits and ADU strategies create value. A standard R1 lot can often support a main house, an ADU, and a JADU — three rentable units where zoning maps say one.
Simplified by-right calculation per LAMC Title 12. Height district, FAR, setbacks, parking, and overlay zones modify the real envelope — architectural analysis required for a final count. Source: LAMC Title 12 — Zoning Regulations.
Interactive Tool
LA Unit Count Calculator
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Units By-Right
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With TOC Bonus
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Est. Permit Fees
This is the simplified by-right math. The full SevenNova report resolves the exact TOC tier, ED1 eligibility, FAR, height district, hazard overlays, and entitlement pathways for your specific parcel.
Get Full Parcel Report — FreeSimplified per LAMC Title 12 base density. Excludes ADU/SB 9 bonuses (R1 shown with SB 9 ceiling), height district, FAR, setback, and parking constraints. Not legal or architectural advice — verify with a full parcel analysis.
TOC Bonus Table — R1
| TOC Tier | Density Bonus | Affordable Req. | Example: 7,500 sq ft lot |
|---|---|---|---|
| Tier 1 | +22.5% | 8% of units | ≈ 2 units |
| Tier 2 | +32.5% | 11% of units | ≈ 2 units |
| Tier 3 | +50% | 15% of units | ≈ 3 units |
| Tier 4 | +80% | 20% of units | ≈ 3 units |
TOC tier is parcel-specific — determined by distance to major transit stops. A SevenNova zoning report resolves the exact tier for any address.
Beyond By-Right: Entitlement Pathways
Standard By-Right
6–14 months. No hearing. Full parking. Units capped at base zoning shown above.
TOC By-Right
Ministerial approval near transit with affordable set-aside. Parking reductions included.
ED1 (100% Affordable)
Ministerial fast-track + state density bonus stacking up to +80%. The deepest unit count available without a hearing.
Check Any LA Parcel in 60 Seconds
SevenNova pulls ZIMAS, Assessor, FEMA, and seismic data for the exact lot — then computes by-right units, TOC tier, ED1 eligibility, and a full entitlement pathway analysis.