Los Angeles, CA Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Base R1 FAR
- 0.45 (45% of lot area)
- R1V variation FAR range
- 0.30–0.65 depending on sub-zone and lot size
- 20% FAR bonus
- Available for step-back or upper-floor taper designs
- Hillside/Coastal lots
- Separate FAR rules per LAMC § 12.21.1 A.1
- R1 lot coverage cap (variation zones)
- 40–50% depending on lot size and zone
Summary
In LA's R1 Zone outside Hillside and Coastal areas, all buildings and accessory buildings combined may not exceed 45% of the lot area (a 0.45 Residential Floor Area ratio), with additional massing controls for taller structures.
5. Maximum Residential Floor Area and Massing. (Amended by Ord. No. 184,802, Eff. 3/17/17.)
(a) R1. For a lot located in a Hillside Area or Coastal Zone, the maximum floor area shall comply with Section 12.21.1 A.1. of this Code.
For lots outside of a Hillside Area or Coastal Zone, the maximum Residential Floor Area contained in all buildings and accessory buildings shall not exceed 45 percent of the lot area (a Residential Floor Area ratio of 0.45).
The encroachment plane shall originate from a point that is 20 feet in height from the existing or finished grade, whichever is lower, along the required front and side yard setbacks.
b. Lot Coverage is the area of a parcel covered by any structures extending more than six feet above grade. However, 400 square feet of required covered parking that is detached and located within the rear half of the lot shall be exempt from lot coverage calculations.
Full Breakdown
The maximum Residential Floor Area (RFA) in the standard R1 Zone is 0.45 of the lot area. For R1 variation zones (R1V, R1F, R1R), the FAR ranges from 0.30 to 0.65 depending on lot size and zone sub-type, with separate height envelopes for front and rear building masses. For Hillside Area and Coastal Zone lots, the FAR is governed by LAMC § 12.21.1 A.1. All buildings and accessory buildings on the lot count together toward the RFA cap. A 20% bonus on the base FAR may be granted if certain step-back or upper-floor mass-reduction design criteria are met. Lot coverage (structures over 6 feet in height) is capped in variation zones but not explicitly stated as a percentage in the base R1 zone.
Violations & Fines
Building permits will not be issued for projects exceeding the RFA limit; plans check by the Department of Building and Safety enforces compliance at permit stage.
Frequently Asked Questions
How much of my lot can I build on in the R1 zone?
Does my detached garage count toward the floor area limit?
Can I get any exceptions to the 45% floor area limit?
Sources & Official References
Other rules in Los Angeles
California rules heatmap·Compare Los Angeles to another location·View the California building setbacks & zoning overview
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Lot Coverage Limits in Nearby Cities
How other cities in Los Angeles County handle lot coverage limits.