Local zoning · San Diego

San Diego — Development Standards

Development Standards under the San Diego local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

This page summarizes how the City of San Diego’s zoning ordinance controls setbacks, height, lot coverage, density, and floor‑area ratio (FAR) for common base zones. It interprets the Land Development Code (zoning provisions) that governs residential, mixed‑use and commercial development and points to where you must check overlays, design review, and parking requirements. For baseline zoning rules start with San Diego Zoning and the city’s Land Use pages.

How to read this page

  • Bolded zone names and numeric standards are decision‑relevant (for example RS‑1‑2, 30 ft, 50%, 0.45 FAR).
  • The ordinance text cited is identified by the controlling code citation (for example § 113.0240) and by the retrieved file excerpt. Where the municipal code excerpt used is from the upload, the file cite marker appears after the § citation (for example ). Verify parcel‑specific rules with the City.

District‑by‑district breakdown

RS (Single‑Family) — example: RS‑1‑2

Purpose and typical uses

  • The RS series is intended for single‑unit residential development; maximum permitted density in many RS categories is one dwelling unit per lot. See § 131.0431 for the RS table and purpose.

Key dimensional standards (examples)

  • Max density: 1 DU/lot (Table for RS zones) — § 131.0431.
  • Minimum lot area and minimum lot width vary by RS subzone (for RS‑1‑2 the ordinance lists a specific minimum lot area in Table 131‑04D) — § 131.0431.
  • FAR: For RS‑1‑2 the maximum FAR is set by Table 131‑04J (example top table values; small‑lot adjustments exist) — § 131.0446.
  • Lot coverage: standard calculations and exclusions (balconies, some garages) are in § 113.0240; special lot coverage rules for RS with steep hillsides appear in § 131.0445 (maximum 50% in certain steep hillside cases).

Where it applies

  • Applies citywide where the base zone on a property is RS. Consult the lot‑specific Table 131‑04D for the exact numeric front/side/rear setbacks and minimum lot sizes — § 131.0431.

Notes & practical guidance

  • Measure setbacks per the City’s measuring rules: front, side, and street‑side setbacks are measured perpendicular to the nearest property line — § 113.0252.
  • ADU standards are governed by state law; local setback limits cannot be so strict as to prevent an 800‑sq‑ft ADU with 4‑ft side/rear setbacks in many cases — see California ADU law and the City’s ADU guidance. Link: San Diego ADUs; California ADU law.

RT (Townhouse/Row) — RT

Purpose and typical uses

  • The RT zones are for attached single‑family/townhouse development. See the residential development regulations in § 131.0430–§ 131.0431.

Key dimensional standards

  • Lot coverage calculation exemptions: in RT zones, garages up to 525 sq ft may be excluded from lot coverage calculations — § 131.0445(b) and lot coverage calculation rules in § 113.0240.
  • Setbacks, minimum lot area and widths are set in the RS/RT tables; check Table 131‑04E/131‑04F (see § 131.0431).

Where it applies

  • Wherever the base zone is RT; Townhouse pattern rules and permit thresholds are governed by the residential division.

RM (Multi‑Family) — examples RM‑1‑1, RM‑2‑4, RM‑5‑12

Purpose and typical uses

  • The RM zones allow higher density multi‑family uses; each RM subzone has distinct height, setback and FAR rules. See development regulations for RM zones in § 131.0431 and the RM‑specific tables.

Key dimensional standards and special rules

  • Building envelope / angled plane: Several RM subzones apply angled building envelope planes that limit height above a threshold at the setback line (examples: a 45° plane at front setbacks for some RM‑1 zones, a 60° plane at side setbacks for RM‑2‑4/‑5/‑6 when structure height exceeds certain limits) — § 131.04G / § 131.04M (angled envelope diagrams).
  • RM‑5‑12 Lot coverage: typical maximum 50% (interior lots) and 60% (corner lots) but reduced as building height increases per Table 131‑04I (e.g., 5 stories/60 ft → 37% coverage) — § 131.0445 and Table 131‑04I.
  • RM‑5‑12 FAR: Table 131‑04K sets different maximum FAR by story/height (for example, 1‑4 stories/48 ft → 1.80 FAR; higher story allowances raise FAR incrementally up to 2.10 for 10+ stories/120 ft) — § 131.0446 and Table 131‑04K.

Where it applies

  • On parcels zoned RM‑X‑Y as indicated on the zoning map; RM‑5‑12 rules are distinct and controlled by the tables noted above. Verify whether Coastal Overlay exceptions apply in your area — editorial notes for recent amendments say some changes do not apply inside the Coastal Overlay until certified — see the editor’s note in the RM tables.

Practical guidance

  • For multi‑family projects you must check both the base RM table and the angled building envelope diagrams; compliance often requires a dimensional exhibit showing the envelope plane per § 131.04M.

RMX / EMX (Mixed‑Use) — example RMX‑2 / EMX‑2

Purpose and typical uses

  • RMX (residential mixed‑use) and EMX (employment mixed‑use) are intended to encourage higher intensity mixed‑use development with pedestrian orientation. See § 131.0708–§ 131.0709.

Key dimensional standards

  • FAR maxima vary by RMX/EMX subzone (Table 131‑07B shows typical maximum FARs: 3.0, 5.0, 7.0 depending on subzone). Setback rules are flexible, with maximum front setbacks often specified. See § 131.0709 and Table 131‑07B.
  • Transit bonuses: Urban village and transit proximity can allow FAR and height bonuses (for example, a 0.5 FAR bonus and an extra story within 2,000 ft of transit) subject to conditions and overlay limits — § 132.1108.

Where it applies

  • In mixed‑use base zones and within Urban Villages as mapped in applicable community plans; design and pedestrian standards are also enforced. Check design‑review triggers and parking rules. Link: San Diego Design Review and Parking.

CN / CO / CC (Commercial) — example CN

Purpose and typical uses

  • Commercial zones permit retail, service, office, and other non‑residential uses; specific use lists and intensity controls are in the base zone tables — consult the zoning map and Table series for CN/CO/CC in Chapter 13.

Key dimensional standards

  • FAR bonuses exist for certain public benefits (for example, a child care facility FAR bonus is authorized in many commercial zones where the child care stays in operation per City rules) — see the ordinance language describing FAR bonuses for child care.
  • Ground‑floor height minimums for commercial ground‑floor space (for activation/retail) appear in the zoning provisions (a 13 ft floor‑to‑floor minimum for some commercial ground floors) — § 131.0548.

Where it applies

  • As shown on the zoning map; check safety compatibility tables where airports or other safety overlays restrict density/intensity. See Chapter 13, Article 2 and Article 15 safety tables.

Most decision‑relevant standards (quick reference)

District (example) Max Structure Height (typical) Min Front Setback (typical) Max Lot Coverage Max FAR (typical) Typical uses Code Reference
RS‑1‑2 varies by lot, commonly 30 ft see Table 131‑04D see § 131.0445 and § 113.0240 Table 131‑04J (e.g., up to 0.70 for very small lots) Single‑family homes § 131.0431, § 131.0446, § 113.0240
RM‑5‑12 Table‑based (e.g., 48 ft for 1‑4 stories; higher allowed) varies (see Table) 50% interior / 60% corner (reduced by height per Table 131‑04I) Table 131‑04K (e.g., 1.80 → 2.10) Multi‑family apartments § 131.0445, § 131.0446, Table 131‑04I/K
RMX‑2 varies (subject to envelope) flexible; max front setback often 20 ft per base zone and project design 3.0–7.0 by subzone per Table 131‑07B Mixed‑use residential/commercial § 131.0709 (Table 131‑07B)
Coastal Height Limit 30 ft (Coastal Limit Overlay) (exceptions exist) N/A N/A N/A Applies within Coastal Overlay § 132.0505 (Proposition D)

(For precise numeric setbacks, minimum lot areas and other table entries always use the specific table for the zone in § 131.0431/Table 131‑04D/4E/4F/4G or the mixed‑use Table 131‑07B — see the code excerpts cited above.)

How the City measures these rules (technical rules you will use)

  • Setback line and measuring setbacks: see § 113.0249 and § 113.0252; setbacks are measured perpendicular to the relevant property line and setback lines define the building envelope at ground level.
  • Lot coverage: calculated as building footprint divided by lot area; exclusions (balconies, limited garages, certain terraces) listed in § 113.0240.
  • FAR / gross floor area: the municipal code defines how to calculate gross floor area and lists exclusions/bonuses for certain zones and uses (see § 131.0446 and related tables). For RM‑5‑12 see Table 131‑04K for FAR by story/height.
  • Height base of measurement: Some sections reference measurement methods using older building code conventions (e.g., Uniform Building Code 1970 references in the Coastal height section). Confirm current base of measurement with the City; the Coastal Height Limit states the base is per the Uniform Building Code of 1970 — § 132.0505(c).

Checklist

  • Identify the parcel’s base zone (e.g., RS‑1‑2, RM‑5‑12, RMX‑2) and confirm on the zoning map. Verify legal lot status per § 113.0237.
  • Extract exact numeric setbacks, min lot area and min lot width from the applicable Table in § 131.0431 (Tables 131‑04D/4E/4F/4G).
  • Measure setbacks per § 113.0252 and determine the building envelope.
  • Calculate lot coverage using § 113.0240 rules and any exclusions (garage area exclusions in RT/RM).
  • Calculate FAR/gross floor area per § 131.0446 and applicable table (131‑04J for certain RS zones; 131‑04K for RM‑5‑12).
  • Check Coastal Height Limit Overlay (§ 132.0505) and any other overlay district restrictions using Overlay Districts resources. Link: San Diego Overlay Districts.
  • For mixed‑use projects confirm RMX/EMX FAR and height limits and potential transit bonuses (§ 131.0709, § 132.1108).
  • Confirm parking requirements (see San Diego Parking), design review triggers (San Diego Design Review), and whether a Site Development or Neighborhood Development Permit is required.

Risks & Ambiguities

Issue Why it matters What to verify
Coastal Height Limit / recent ordinance amendments Proposition‑derived Coastal height cap (30 ft) can override base zone height; recent ordinance amendments may not apply pending Coastal Commission certification Confirm whether your parcel is in the Coastal Overlay and whether any O‑21836 amendments are effective there — § 132.0505 and editor’s note in RM tables.
Base of height measurement Some sections explicitly reference the Uniform Building Code (1970) as the base for height measurement — older measurement conventions may differ from current building code practice Confirm with City planner which base of measurement the City is using for your permit (verify with jurisdiction). § 132.0505(c).
FAR and lot coverage calculation exceptions Different zones exclude certain garage areas or steep hillside areas from calculations; tables vary by zone and by lot area Use § 113.0240 for lot coverage method and the specific table for your zone (e.g., § 131.0445, § 131.0446); if lot has steep hillsides apply the special rules in the zone tables.
ADU regulation interaction (state vs local) State ADU law limits what local rules can require (size, setbacks, parking), but the City also has local development standards Use the City’s ADU guidance and California ADU law; where municipal code is silent or conflicts with state law, state law can control — verify with City. Not every ADU detail is contained in the City zoning tables.
Parcel‑specific exceptions (lot ties, recorded setbacks) Earlier plats, record of survey, or a recorded subdivision may set different setback lines or lot tie agreements Check § 113.0249(b) and § 113.0237 and confirm recorded documents for the property. Verify with jurisdiction.

Plain‑English summary

San Diego’s zoning rules set the allowable size and placement of buildings by zone: single‑family RS zones limit density to one house per lot and have tabled minimum lot sizes and setbacks, RM zones use angled building envelopes, height and coverage tables (RM‑5‑12 is a common tabled example), and mixed‑use zones (RMX/EMX) set FAR ceilings but often allow transit bonuses near stations. Always measure setbacks and coverage using the City’s measurement rules, check overlay limits such as the Coastal Height Limit (30 ft), and confirm ADU exceptions under state law. See the cited municipal code sections for the controlling numbers.

Source References

  • § 113.0240 Calculating Lot Coverage (method and exclusions) —
  • § 113.0249 Determining Setback Line and § 113.0252 Measuring Setbacks —
  • § 113.0237 Determining a Lot (legal lot rules) —
  • § 131.0430 / § 131.0431 Development regulations and tables for Residential Zones (Tables 131‑04D/4E/4F/4G) —
  • § 131.0445 Lot Coverage in Residential Zones (RS/RT/RM notes) —
  • § 131.0446 Maximum Floor Area Ratio in Residential Zones and Table 131‑04J —
  • Table 131‑04I Lot Coverage reductions in RM‑5‑12 and related tables —
  • Table 131‑04K FAR in RM‑5‑12 zone —
  • § 131.0708 / § 131.0709 Development regulations for Mixed‑Use Zones and Table 131‑07B (RMX/EMX) —
  • § 132.1107 / § 132.1108 Urban Village density/FAR/height bonus rules —
  • § 132.0505 Coastal Height Limit (Proposition D — 30 ft coastal cap) —
  • City editor’s note about O‑21836 amendments and Coastal Overlay applicability —

Other helpful pages (internal links referenced earlier)

  • San Diego Zoning (/us/california/san-diego/zoning)
  • San Diego Land Use (/us/california/san-diego/land-use)
  • San Diego Parking (/us/california/san-diego/parking)
  • San Diego Design Review (/us/california/san-diego/design-review)
  • San Diego Overlay Districts (/us/california/san-diego/overlay-districts)
  • San Diego ADUs (/us/california/san-diego/adu)
  • California ADU law (/us/california/california-adu-laws)
  • California Building Standards Code (/us/california/building-codes)

If you want the exact table entries for your parcel’s base zone (for example the numeric front/side/rear setbacks and min lot area for RS‑1‑2) tell me the parcel’s zone or address and I will extract the exact table row and code citations. Verify all parcel‑specific interpretation with the City’s planning counter.

Sources

Retrieved passages

  • San Diego Zoning Code (Chapter 13) High relevance
  • San Diego Zoning Code (Section 142.0805) High relevance
  • San Diego Zoning Code (§132.1108) High relevance
  • San Diego Zoning Code (Chapter 13) High relevance
  • San Diego Zoning Code (Chapter 13) High relevance
  • San Diego Zoning Code (Chapter 11) High relevance
  • San Diego Zoning Code (Section 113.0237) High relevance
  • San Diego Zoning Code (Section 141.0606) High relevance

Cited sections

Frequently asked questions

What can I build on an R‑1 lot in San Diego?

You can generally build a single dwelling unit per lot in R‑series single‑family zones; the exact minimum lot area, setbacks and allowed lot coverage depend on the subzone (for example RS‑1‑2) and are shown in the residential development tables — see § 131.0431 and the applicable Table 131‑04D for the numeric limits. Verify applicable overlays and lot legality per § 113.0237.

What are San Diego setback requirements?

Setback distances are set in the base‑zone development tables (Residential Tables 131‑04D/4E/4F/4G; mixed‑use Table 131‑07B) and are measured perpendicular to the property line per § 113.0252. If a recorded map or subdivision established a different setback line, that recorded line controls as described in § 113.0249.

How is lot coverage calculated in San Diego?

Lot coverage is the building footprint divided by lot area, with specific exclusions (e.g., certain balconies, small garages, open terraces) listed in § 113.0240. Some zones (like RT) exclude up to 525 sq ft of garage area from coverage — see § 113.0240 and § 131.0445.

What height limits apply in the Coastal zone?

The Coastal Height Limit Overlay caps building height at 30 ft in the Coastal Zone unless specific exceptions apply; this is codified in § 132.0505. Confirm whether your site is within one of the exceptions listed in that section and check whether any recent local ordinance amendments apply in the Coastal Overlay.

How do I calculate FAR for an RS or RM project?

FAR rules are set by zone tables: for many RS subzones the City uses Table 131‑04J to set maximum FAR by lot area (see § 131.0446). For RM‑5‑12 see Table 131‑04K which varies FAR by stories/height. Use the municipal calculation of gross floor area in the code and apply the table for your zone.

Do angled building envelopes apply in San Diego?

Yes — several RM subzones and others use angled building envelope or plane limits measured at setback lines to limit building massing above a given height (examples: 45° at front setback for some RM‑1 zones; 60° at side setbacks for some RM‑2 zones) — see the angled envelope rules and diagrams in the RM development sections.

Will the City allow FAR or height bonuses near transit?

The ordinance permits FAR and a one‑story height bonus for projects within 2,000 ft of a light rail or trunk transit station in Urban Villages and some mixed‑use contexts, unless disallowed by overlays (for example, the Coastal Height Limit) — see § 132.1108 and § 131.0709.

Where are the garage and balcony exclusions spelled out?

Exemptions and counted vs excluded building elements for lot coverage and gross floor area (garages, small balconies, architectural projections) are listed in § 113.0240 and in zone‑specific notes such as § 131.0445 for residential zones.

Do state ADU rules override local setback or coverage limits?

State ADU law imposes minimum allowances and limits on how restrictive local rules can be (for example, limiting local ability to prevent an 800‑sq‑ft ADU with 4‑ft side/rear setbacks); consult the City ADU page and California ADU law; also see the 2025 ADU handbook summary in the materials provided. Verify with the City for parcel‑specific application.

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