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South San Francisco — Development Standards

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

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Last reviewed: July 2, 2026

Overview

This page summarizes the South San Francisco Zoning Ordinance (Title 20) rules that control development standards — setbacks, heights, lot coverage, density, and FAR — for each local zoning district and specific-plan area. For background on how zoning maps and land uses interact with these standards, see South San Francisco Zoning and South San Francisco Land Use. Where the code refers to building-safety requirements it defers to the California Building Standards Code (Title 24); that material is outside this page's scope.

The following is district-by-district, ordinance-grounded guidance (with the controlling § cited) and a decision-focused table of the most-used numeric limits.

How to read this page

  • Bolded terms show the code names that appear in Title 20 (for example, T6UC, DRL).
  • Each numeric rule is tied to the ordinance § cited with the § glyph and a file citation to the retrieved code excerpts.
  • When the code points to other chapters (for FAR measurement, height measurement, or airport limits) those cross-references are noted and cited.
  • Topics that commonly affect designs (parking, design review, overlays, ADUs) are linked: parking standards can be found via the city's parking rules; design review is handled under the city's design review procedures; overlay-related height and incentive rules are in the city's overlay districts chapter; accessory dwelling units are introduced on the city's ADUs page.

District-by-district standards (purpose, typical uses, key numerics, where it applies)

Note: Many districts are organized as either form-based "transect" zones (Lindenville / Downtown transects) or conventional residential / non-residential zones. Where a table is established in Title 20, that table is the controlling numeric summary; interpretive notes follow each table citation.

  • T6UC — T6 Urban Core Zoning District (highest-intensity transect)

    • Purpose / typical uses: Transit-oriented high-intensity mixed-use core (tower/mid-rise residential, office, ground-floor active uses). See minimum/maximum densities and FAR in the Lindenville / form-based rules.
    • Key numerics: Residential density 120–200 du/ac; FAR 2.0 min.; 8.0 max; build-to and front build-to rules require 0–10 ft front build-to with minimum build-to coverage; lot coverage up to 90%; primary building setbacks: interior 0 ft; rear 0 ft (10 ft adjacent to non-transect). See § 20.135.020 .
    • Where it applies: Lindenville / higher-intensity downtown cores; also subject to ALUCP/FAA limits per § 20.150.005. See Figure 20.150.005 for mapped height limits. Verify with the jurisdiction on parcel-specific FAA/ALUCP constraints. See § 20.150.005 .

  • T5L / T4L / T3 (form-based transect districts: T5L, T4L, T3C, T3N, etc.)

    • Purpose / typical uses: Walkable mixed-use corridors and transitions to neighborhoods; ranges from medium-high (T5L) to low-intensity neighborhood (T3N). See build-to/frontage rules.
    • Key numerics: examples from the transect table: T5L typical maxima include FAR total 1.5 min. (higher with bonuses), lot coverage ~70%, max height up to 85 ft in some building-type-limited areas; T4L/T3C have lower heights (e.g., 65 ft or 50 ft depending on subtype) and lower lot coverage (70%–80%). Primary building setbacks often permit 0 ft interior and 0–15 ft front with build-to area requirements. See § 20.135.020 and § 20.135.020 (various transect subsections) .
    • Special: Lindenville has its own design standards that can supersede general standards where conflicts exist—see § 20.150.008 .

  • Downtown Residential: DRL, DRM, DRH (Table 20.080.003)

    • Purpose / typical uses: Downtown residential intensities (low/medium/high). Typical uses: single-family, duplexes, small multifamily conforming to downtown character.
    • Key numerics (Table 20.080.003): Minimum density: DRL 15 du/ac, DRM 25 du/ac, DRH 40 du/ac (or existing density, whichever greater); Maximum density: DRL 22 du/ac, DRM 37.5 du/ac, DRH 50 du/ac; Max FAR examples: DRL 0.70 or 2,000 sf whichever greater; DRM 1.25; DRH 2.0+ where noted; Max lot coverage 80% (DRL) / 90% (DRM/DRH); Heights: DRL ~28 ft/2 stories; DRM 35 ft/3 stories; DRH up to 50 ft/4 stories; Setbacks: typical front 15 ft (but different minimums where above-ground parking exists), interior side 5 ft with upper-story rules, lane-facing front setback min 5 ft max 20 ft. See § 20.080.003 .

  • Conventional Residential (RL, RM, RH, RM-22, RH-180, etc.)

    • Purpose / typical uses: Conventional single-family and multi-family zones outside form-based areas. See Chapter 20.070 for the full conventional-residential table and district list. Many conventional districts list minimum lot sizes, interior setbacks (often 5–10 ft), rear setbacks (10–15 ft when adjacent to R districts), max lot coverage (60–90% depending on district) and height caps (commonly 35 ft). See § 20.150.007 and Chapter 20.070 references in Title 20. Verify with parcel zoning. See § 20.150.007 .

  • Non-residential districts (CC, BPO, BTP-M, BTP-H, MIM, MIH, etc.)

    • Purpose / typical uses: Commercial centers, business park/office, technology/industrial uses, mixed industrial/manufacturing.
    • Key numerics (Table 20.100.003): Max FAR ranges by district: CC 0.5; BPO 1.0 (2.5 with community benefits); BTP ranges 0.5–2.0 depending on clean tech designation; Max lot coverage examples: CC 50%, BPO 70%, BTP 60%; Max building heights vary (many show 50 ft or provide N/A with lettered keys for exceptions); see the table for district-specific keys. See § 20.100.003 .

  • Oyster Point Specific Plan District

    • Purpose / typical uses: Large-planned areas around Oyster Point with designated planning areas.
    • Key numerics (Table 20.230.004(1)): Minimum lot size: 43,560 sf (Planning Area 1) / 10,000 sf (Planning Area 2); Max FAR: varies by use — hotel 1.6 (without incentives), office 1.0, other uses 0.5; with incentives higher FAR allowed; Max building coverage example 60%; Max building height: limited by map and FAA; see Chapter 20.040 and § 20.300.007 references. See § 20.230.004 .

  • Southline Campus Specific Plan (S‑C District)

    • Purpose / typical uses: Southline campus redevelopment; mixed-use campus.
    • Key numerics (Table 20.290.002): Max FAR 2.4 (see rules of measurement); Max lot coverage 70%; Minimum open space coverage 15%; Maximum height: “maximum height limits permissible under Federal Aviation Regulations Part 77” and Specific Plan figures — verify with the map. See § 20.290.005 .

  • Height Incentive Overlay (HI) and other overlays

    • Purpose: Provide bonuses or additional allowable height/FAR for community benefits as established in overlay chapters or specific plans. The Lindenville Specific Plan establishes a Height Incentive Overlay; transfer of development rights and bonus FAR details are in the Lindenville chapters. See Chapter 20.160 and § 20.150.005 for how overlay incentives and maximum heights are displayed. See § 20.160.001 and § 20.150.005 .

Quick reference table — key development standards (decision-relevant)

District (bold) Typical permitted uses Max Height Max FAR (typical) Max Lot Coverage Key setback / placement rules Code Reference
T6UC High‑intensity mixed use, transit core Varies; up to 85 ft (map/building type limited) 2.0–8.0 90% Front build-to 0–10 ft; interior 0 ft; rear 0 ft (10 ft adj. non‑transect) § 20.135.020
T5L High walkable mixed-use ~85 ft Total 1.5 min.; max per plan varies ~70% Build-to and frontage rules; interior 0 ft § 20.135.020
T4L / T3C Medium/low mixed use 50–65 ft 1.25–2.25 65–80% Front build-to 0–15 ft; interior 0–5 ft; lot coverage caps apply § 20.135.020
DRL / DRM / DRH Downtown residential DRL 28 ft / DRM 35 ft / DRH 50 ft DRL 0.70 / DRM 1.25 / DRH higher 80%–90% Front 15 ft min (exceptions for above‑ground parking); lane-facing 5–20 ft; interior 5 ft (upper‑story rules) § 20.080.003
CC / BPO / BTP / MIM / MIH Commercial, office, industrial 50 ft typical; varies 0.4–2.5 (with community benefits) 50%–70% Min lot sizes (5,000–15,000 sf), frontage requirements § 20.100.003
Oyster Point Specific Plan Mixed — hotel, office, other Map-based; FAA limits apply Hotel 1.6 (base); office 1.0; others 0.5 60% Large-lot minimums (43,560 sf or 10,000 sf depending on area) § 20.230.004
S‑C (Southline) Campus / mixed-use Map & Part 77 limited Max FAR 2.4 70% Min open space coverage 15%; parking setbacks and podium rules § 20.290.005

(Notes: many tables include lettered keys and additional rules — read the full table in each cited § for exceptions or incentives. Ground-floor nonresidential uses may be exempt from maximum FAR per § 20.040.009 . Height measurement rules are in § 20.040.005 and airport/ALUCP constraints in § 20.300.003 .)

Practical guidance / plain-English interpretation of the rules

  • The Title 20 tables are the operative numeric limits. Where a district is form-based (Lindenville transects: T3, T4, T5, T6), expect build-to area requirements (minimum percentage of frontage built) and narrow acceptable front setbacks; those rules override many conventional setback norms — see § 20.135.020 .

  • FAR is both a control and an incentive lever: base FARs are listed in tables; additional FAR often requires participation in a community‑benefits or bonus program (see Lindenville incentives and Chapter 20.395). See § 20.150.005 and the Oyster Point table for examples. .

  • Airport safety (ALUCP / FAA Part 77) can reduce allowable heights below the tabulated maxima — the lower of the FAA/ALUCP limit and the local max controls. Always check ALUCP consistency requirements in § 20.300.003. .

  • Parking location and setbacks are strictly called out in multiple district tables (front parking setbacks, screening by habitable uses, curb cut width limits). Consult the on-site parking chapter for calculations and the city's parking rules when designing vehicle access and layout. See parking setbacks in district tables and consult South San Francisco Parking for procedural details. Example rules include front parking setbacks of 20–40 ft in many transect maps and curb cut max widths 12–20 ft depending on district. See § 20.135.020 and § 20.080.003. .

  • Design review and public improvements: projects that change more than 25% of gross floor area for commercial or multifamily triggers public-improvement obligations along the frontage and are subject to the city's design review process; design-review conditions may impose site-specific development conditions. See the design-review conditions/appeals language and the requirement for public improvements in the district tables. See § 20.480.008–.011 and the district notes (e.g., § 20.135.020). .

Checklist (what an applicant must demonstrate / satisfy)

  • Confirm the parcel's zoning district and applicable specific plan overlay (e.g., T4L, S‑C, Oyster Point) and use the district-specific table as the first screen (see § 20.135.020, § 20.290.005, § 20.230.004).
  • Demonstrate compliance with the district minimum/maximum density and FAR limits (including whether the project qualifies for bonus FAR or density bonus programs). See § 20.080.003 and Chapter 20.390 for bonuses.
  • Verify and apply correct height measurement rules and ALUCP/FAA constraints per § 20.040.005 and § 20.300.003; if the site is in Lindenville check the Height Incentive Overlay rules.
  • Meet the district setback / build-to and lot coverage limits in the controlling table (front, street-side, interior-side, rear). For form-based zones include build-to percentage compliance. See the district tables in § 20.135.020 and § 20.080.003.
  • For parking: size the parking and access to meet curb-cut and parking-setback requirements (many districts require parking screened by habitable uses and front setbacks of 20–40 ft). Consult the parking chapter and the district table. See § 20.135.020 and South San Francisco Parking.
  • Identify whether design review or public improvements are required (e.g., projects altering >25% gross floor area). Prepare public-improvement plans if triggered. See § 20.135.020 and § 20.480.011.
  • Confirm FAR and lot coverage measurement rules (see Chapter § 20.040 on rules of measurement and exemptions for ground-floor nonresidential).

Risks & Ambiguities

Issue Why it matters What to verify
ALUCP / FAA height caps vs. table maxima The ordinance says the lower of FAA/ALUCP and the local max controls — a project may be allowed less height than the district table suggests. Verify ALUCP maps and submit airspace protection evaluation; cite § 20.300.003 and § 20.150.005.
How FAR is measured (ground-floor exemptions) Ground-floor nonresidential uses may be treated differently for maximum FAR — changes the developable square footage. Confirm application of § 20.040.009 ("Determining Floor Area Ratio") and any stationing of exemptions in the district table.
Overlay/incentive conditions (Height Incentive Overlay, community benefits) Bonus FAR or height may require community benefits or TDRs; misreading can lead to rejected entitlement. Check Chapter 20.160 (HI overlay), Lindenville specifics, and Chapter 20.395 for community benefits. See § 20.150.005 and Chapter 20.160.
Parcel-specific lot-size minimum exceptions and legal nonconforming status Lots created after adoption that don't meet minimums may not be developable under the code. Verify lot legal status and consult notes in Oyster Point and Table footnotes (see § 20.230.004).
District table lettered keys and cross-references Tables often have lettered notes (A, B, C) directing to other sections for exceptions. Missing a key can misstate allowed heights/FAR. Read the full table including lettered notes and cross-referenced §§ (e.g., § 20.100.003 table keys).
Transition standards next to conventional R districts Form-based districts often impose larger rear setbacks or stepbacks where adjacent to lower-density R districts. Verify transition rules in § 20.135.020 and the specific district transition notes.

Plain-English Summary

South San Francisco’s Title 20 sets district‑specific numeric limits on how big and tall buildings can be (height, setbacks, lot coverage, FAR, and density). Form‑based transect zones (T3–T6) emphasize build‑to frontage and tighter or zero setbacks; downtown residential tables set story and lot-coverage caps; specific plans (Oyster Point, Southline, Lindenville) add their own FAR and height maps and may allow bonuses with conditions. Always check the exact table for your zoning district and any overlay or FAA/ALUCP constraint before designing. See the district tables cited above for the controlling numbers (e.g., § 20.135.020, § 20.080.003, § 20.100.003).

Source References

  • South San Francisco Zoning — Form-Based Transect Districts: § 20.135.020.
  • Downtown Residential Table: § 20.080.003 (Table 20.080.003).
  • Non‑Residential Development Standards Table: § 20.100.003 (Table 20.100.003).
  • Oyster Point Specific Plan — Development Standards: § 20.230.004 (Table 20.230.004(1)).
  • Southline Campus Specific Plan — Development Standards: § 20.290.005 (Table 20.290.002).
  • Lindenville Specific Plan and Height Incentive / overlays: § 20.150.005, § 20.150.008, Chapter 20.160.
  • FAR and measurement cross-references: § 20.040.009 (Determining FAR) and § 20.040.005 (Measuring Height).
  • Airport/ALUCP consistency: § 20.300.003 (ALUCP / FAA limits).
  • Design review conditions and enforcement: § 20.480.008–.011.

Also consult the city's topic pages for procedure-oriented material: South San Francisco Zoning, South San Francisco Land Use, South San Francisco Parking, South San Francisco Design Review, South San Francisco Overlay Districts, South San Francisco ADUs, and the California Building Standards Code (Title 24).

Sources

Retrieved passages

  • South San Francisco Zoning Code (§ 20.080.003) High relevance
  • South San Francisco Zoning Code (§ 20.135.020) High relevance
  • South San Francisco Zoning Code (§ 20.230.004.) High relevance
  • South San Francisco Zoning Code (Chapter 20.390) High relevance
  • South San Francisco Zoning Code (Section 65915) High relevance
  • South San Francisco Zoning Code (Section 65915) High relevance
  • South San Francisco Zoning Code (§ 20.100.003) High relevance

Cited sections

Frequently asked questions

What can I build on an R-1 lot in South San Francisco?

What’s allowed on a conventional R (residential) lot depends on the R‑subdistrict (for example RL, RM, RH) and the lot’s specific table in Title 20; conventional residential district standards and permitted uses are described in Chapter 20.070 and cross-referenced from § 20.150.007. Verify the parcel’s exact zoning and check the district table for permitted uses, setbacks, lot coverage, and height caps.

What are South San Francisco setback requirements for front, side, and rear yards?

Setbacks are district-specific. Form-based transect zones often allow 0 ft interior side setbacks and small front build-to zones (e.g., 0–15 ft front), while conventional and downtown residential tables specify front ~15 ft, interior side often 5 ft, and rear 10–15 ft where abutting R districts. See the controlling district table(s) in § 20.135.020 and § 20.080.003.

How is building height measured in South San Francisco, and what about FAA/ALUCP limits?

Height measurement rules are in § 20.040.005; many district tables note that FAA Part 77 or ALUCP constraints may lower allowable heights. The ordinance requires using the lower of the FAA/ALUCP height and the district max; see § 20.150.005 and § 20.300.003. Confirm ALUCP applicability for your parcel.

Does South San Francisco regulate lot coverage and FAR differently in special plan areas?

Yes. Specific plans (for example Oyster Point and Southline) include their own development tables with distinct Max FAR and Max lot coverage figures (e.g., Oyster Point shows hotel FAR 1.6 base; office 1.0; Southline shows Max FAR 2.4; lot coverage 70%). Always use the specific-plan table where a parcel lies in a specific plan. See § 20.230.004 and § 20.290.005.

Are there standard parking setbacks or curb-cut width limits I must follow?

Yes. Many district tables require parking be set back or screened (front parking setbacks of 20–40 ft in transects) and curb‑cut maximum widths commonly 12–20 ft (depends on district). Check the district’s parking setback rows and the city’s parking chapter for stall counts and design rules. See § 20.135.020 and the non-residential/residential tables for exact numbers.

Do I need design review for changes to an existing commercial building?

If the project involves alterations comprising more than 25% of the gross floor area, new commercial or multifamily projects must provide public improvements and will be subject to design‑review conditions per the district notes and design‑review chapter. See the district notes in § 20.135.020 and design review enforcement in § 20.480.011.

Can I exceed a district’s maximum FAR by paying fees or providing public amenities?

Some districts allow increased FAR or height through community-benefits programs, transfer of development rights (TDR), or height-incentive overlays (e.g., Lindenville Height Incentive Overlay); such increases carry conditions and limits. See § 20.150.005 and Chapter 20.160 for overlay and incentive mechanics.

Where do I find rules for accessory structures and ADUs in the context of setbacks and lot coverage?

ADU-specific regulations are addressed by state law and the city's ADU chapter; local Title 20 tables still control lot coverage, setbacks, and height for accessory buildings unless Title 20 or the ADU chapter provides an exception. Consult the city's ADUs page and local Title 20 district tables to reconcile requirements; if not present in Title 20 materials, state ADU law may supersede. Verify with the jurisdiction.

How are lot coverage and podium/parking decks measured?

Lot coverage measurement rules and whether podium areas count are explained in the Rules of Measurement (Chapter 20.040, and table notes). Some transect districts state lot coverage is measured as building area above a parking podium — check district-specific language in § 20.135.020 and measurement rules in § 20.040.010.

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