Zoning Guide

Los Angeles Setbacks & Height Limits — Residential Zones

Last updated: Verified:

Fact-checked against Los Angeles City Planning's January 2026 zoning summary and current California ADU law on September 20, 2026.

Los Angeles does not have one universal residential setback or height rule. The applicable standards depend on the parcel's zoning system, zone, Height District, hillside/coastal status, specific plan, overlay, and other mapped controls.

The legacy Los Angeles Zoning Code in LAMC Chapter 1 still applies broadly, while the new Zoning Code in Chapter 1A is already applied in the Downtown Community Plan Area and is intended to roll out through future Community Plan updates.

R1 Base Yard Standards Under the Legacy Code

Los Angeles City Planning's January 2026 Generalized Summary lists the following base R1 standards:

Standard R1
Minimum lot area 5,000 sq ft
Minimum lot width 50 ft
Front yard 20% of lot depth, maximum 20 ft, but not less than the applicable prevailing setback
Interior side yard 5 ft; or 10% of lot width when the lot is under 50 ft wide, with a 3-ft minimum
Rear yard 15 ft minimum

The current summary also notes an additional 5-ft offset for qualifying long/tall side walls in R1.

The previous version of this page presented 20 ft as a simple universal R1 front setback. That omitted the lot-depth and prevailing-setback rules.

Height Is Not a Single R1 Number

The previous page described R1 height as 33 ft on flat lots and 36 ft on hillside lots. That is not a reliable citywide rule.

The January 2026 City Planning summary directs R1 height to the separate Height District table and notes that R1 is also subject to an encroachment plane. Roof slope, Height District, Hillside Area, Coastal Zone, and R1 variation zoning can change the applicable limit.

For example, the City's current quick-reference material includes 33-ft and 28-ft limits for certain R1/RS/RE9 Height District conditions depending on roof slope, but those values should not be copied to a parcel until its complete zoning designation is known.

Use ZIMAS to identify the full zone and Height District before applying a height number.

R1 Variation Zones

R1V, R1F, R1R, and R1H have additional form and massing rules and are not adequately described by a generic R1 setback-and-height table.

If ZIMAS shows an R1 variation, use the current LAMC section and City Planning summary for that exact designation.

Residential Floor Area and Hillside Rules

Residential floor-area controls in Los Angeles depend on the applicable zone and parcel conditions. Hillside properties can also be subject to separate slope, grading, retaining-wall, and floor-area rules.

The previous page's simplified BMO/BHO FAR description and old bonus language have been removed because those calculations should be taken from the current LAMC and City Planning materials for the parcel.

New Chapter 1A Zoning Code

Los Angeles adopted a new Zoning Code as LAMC Chapter 1A in 2024. City Planning states that Chapter 1A currently applies in the Downtown Community Plan Area and will expand through Community Plan updates.

A Downtown parcel should therefore not be analyzed solely under the legacy R1/R2/R3 framework in Chapter 1.

California State ADU Law

Older references to Government Code §§65852.2 and 65852.22 are outdated. California HCD's 2026 materials identify current State ADU Law as Government Code §§66310–66342.

Among other limits on local regulation, current state law does not allow a local jurisdiction to require more than a 4-ft side or rear setback for a new-construction ADU. ADU height rules vary by the statutory configuration and should be checked under the current state law and Los Angeles implementation rather than reduced to one universal 16-ft rule.

See the Los Angeles ADU rules page for ADU-specific guidance.

How to Check a Property

  1. Look up the parcel in ZIMAS.
  2. Record the complete zone, Height District, and whether Chapter 1 or Chapter 1A applies.
  3. Check Hillside Area, Coastal Zone, specific plans, HPOZs, and other overlays.
  4. Use the current zoning-code section for the exact zone and building type.
  5. Check state housing-law overrides separately where applicable.
  6. Confirm parcel-specific interpretations with Los Angeles City Planning before relying on a design dimension.

Official Sources

This guide is informational only. The current zoning code, ZIMAS designations, state law, and parcel-specific controls govern.

More about Los Angeles Zoning

ADU Rules & RegulationsBuilding Permits — Cost & Timeline

Sources

  1. Los Angeles Municipal Code — Chapter I, Article 2 (Zoning)·codelibrary.amlegal.com·Accessed 2026-04-14·Direct link
  2. Los Angeles Department of City Planning·planning.lacity.gov·Accessed 2026-04-14·Direct link
  3. ZIMAS — Zoning Information & Map Access System·zimas.lacity.org·Accessed 2026-04-14·Direct link
  4. Baseline Mansionization Ordinance — LA Planning·planning.lacity.gov·Accessed 2026-04-14·Direct link

FAQ

What are the R1 setback requirements in Los Angeles?
In the R1 (One-Family) zone, the LA Municipal Code requires a front yard of approximately 20 feet (or the prevailing setback of adjacent lots on the same block, whichever applies), a side yard of 5 feet (interior), and a rear yard of 15 feet. Specific plans, hillside areas, and overlay districts can change these numbers — always confirm on ZIMAS for your specific parcel.
What is the maximum building height in an LA R1 zone?
Maximum building height in the R1 zone is 33 feet on flat lots and up to 36 feet on hillside lots, measured to the highest point of the roof. The Baseline Mansionization Ordinance (BMO) and Baseline Hillside Ordinance (BHO) layer additional limits on roof height, encroachment planes, and floor area on top of the base R1 envelope.
Are hillside properties in Los Angeles regulated differently?
Yes. The Baseline Hillside Ordinance applies to lots in designated Hillside Areas and adds rules about height measurement from existing grade, encroachment planes, retaining wall heights, and reduced floor area ratios. Hillside lots also commonly fall within Very High Fire Hazard Severity Zones, which adds Building Code requirements but does not change zoning setbacks.
How do I find my zoning district and overlays in Los Angeles?
Use ZIMAS at zimas.lacity.org. Enter your address to see the zone, height district, specific plan, HPOZ, hillside designation, and any overlays that apply. ZIMAS is the city's official zoning lookup tool and is the best starting point before reading the LAMC sections that apply to your zone.