Setbacks & Height Limits in San Diego

This guide explains the basic setback and height rules that apply to residential construction in San Diego. These numbers depend on your exact zoning district, overlay zones, and lot geometry, so always confirm with the City of San Diego Development Services Department before finalizing plans.

What Are Setbacks?

A setback is the minimum required distance between a building and a lot line. Setbacks are measured from the property line to the nearest point of the building (typically the wall, but eaves, bay windows, and chimneys can have their own rules).

The San Diego Municipal Code (SDMC) Chapter 13, Article 1, Division 4 specifies front, side, and rear setbacks separately for each residential base zone. Corner lots have one front setback and one street side setback, plus an interior side and rear setback.

Typical Residential Setbacks (RS-1-7)

San Diego's most common single-family zone is RS-1-7, with a minimum lot size of 5,000 sq ft. Approximate dimensional standards from SDMC §131.0431:

Larger-lot single-unit zones tighten these numbers — RS-1-14 (10,000 sq ft minimum lots) requires 20 ft front, 6 ft side, and 13 ft rear setbacks. Multi-unit RM zones use a different schedule again.

Height Limits

Maximum structure height in San Diego's RS (single-unit) residential zones is 30 ft, measured from the lower of existing or finished grade to the highest point of the structure. RM-1-1 multi-unit zones allow up to 40 ft, and higher-density RM and CC (commercial) zones allow more.

Height rules get more complicated in:

• Coastal Height Limit Overlay — areas west of I-5 are capped at 30 ft regardless of base zone, per a 1972 voter initiative
• Hillside areas — Environmentally Sensitive Lands and Steep Hillside regulations limit massing and grading
• Airport Land Use Compatibility Overlay — height is restricted around Lindbergh Field, Montgomery, and Brown Field
• Community plans — many of San Diego's 50+ community plans add neighborhood-specific height caps

Lot Coverage and FAR

Beyond setbacks and height, two other numbers shape how much you can build:

• Lot coverage — the percentage of the lot covered by buildings. RS-1-7 typically allows around 50%; RS-1-14 around 40%.
• Floor Area Ratio (FAR) — the ratio of total floor area to lot area. RS-1-7 has a base FAR of 0.60 (so a 5,000 sq ft lot allows roughly 3,000 sq ft of floor area). RS-1-14 is 0.45.

FAR is often the binding constraint on second-story additions, even when setbacks and height are met.

Common Exceptions and Encroachments

SDMC allows certain features to project into required setbacks. Typical allowances include:

• Eaves, gutters, and cornices (usually up to 2 ft)
• Chimneys (up to 2 ft)
• Uncovered porches, stoops, and steps
• Air conditioning condensers (subject to sound limits)
• Bay windows (limited projection)

Fences, retaining walls, and accessory structures have separate rules — see SDMC §142.0301 (Fences and Walls) and §141.0302 (Accessory Structures).

State ADU Overrides

If your project is an Accessory Dwelling Unit (ADU), California Government Code §65852.2 overrides local setback and height rules. The state requires San Diego to allow at least one ADU up to 800 sq ft, 16 ft tall, with only 4 ft side and rear setbacks — even in zones that would otherwise require more. San Diego's Information Bulletin 400 reflects these minimums and goes further, allowing detached ADUs up to 1,200 sq ft. See the ADU rules page for this city.

How to Look Up Your Specific Requirements

1. Find your zoning district — use the City of San Diego / SANDAG GIS portal (sdgis.sandag.org) or the Development Services zoning lookup
2. Read the zone chapter — SDMC Chapter 13, Article 1, Division 4 lists residential base zone setbacks, height, FAR, and lot coverage
3. Check for overlays — Coastal, Coastal Height, Airport, Historical, and ESL overlays can modify the base rules
4. Check your community plan — community plans may add density or design standards
5. Ask DSD — Development Services offers a Zoning Information counter and phone line at (619) 446-5000 before you commit to design

Variances

If your project cannot meet the strict letter of the zoning code, you may apply for a variance under SDMC §126.0805 — a discretionary request to deviate from the rules based on hardship specific to your lot. Variances require findings, public notice, and often a hearing. See the Variance Application Guide for the general process.

Official Sources

See the sources linked in the frontmatter for the San Diego Municipal Code (Chapter 13) and the Development Services Department. This guide is informational and is not a substitute for direct confirmation from planning staff. Always verify current standards with DSD before submitting plans.