Local zoning · San Bruno

San Bruno — Historic Preservation

Historic Preservation under the San Bruno local zoning and planning code, with the controlling citations.

Last reviewed: July 2, 2026

Overview

San Bruno’s zoning ordinance does not contain a standalone historic-preservation chapter or a clear local landmark-designation procedure in the materials retrieved. The local regulatory tools that functionally affect historic resources are (1) citywide architectural review requirements with district-specific triggers and design guidance, and (2) targeted development exceptions/standards that reference architecturally and historically significant historic district(s) (not further defined in the retrieved text). For state-level code settings that apply to qualified historic resources, the California Historical Building Code and related state standards are applicable. See the code citations below for where these rules appear in the San Bruno Municipal Code. Verify with the jurisdiction whether an official local landmark list or historic overlay exists; that process is Not found in retrieved materials.

How San Bruno regulates historic resources (what the ordinance actually says)

The primary local mechanism that governs exterior changes and new work that may affect historic character is the requirement for an architectural review permit appearing across the zoning chapters (for example in mixed‑use districts and in specific district development standards) — see § 12.280.030 and multiple district entries that cross‑reference Chapter 12.108 for process and findings. § 12.280.030 .
The ADU chapter contains an explicit parking exception when an ADU is located in an architecturally and historically significant historic district: no on‑site parking is required in that circumstance — see § 12.90 (E)(9)(c)(ii). § 12.90 .
Design consistency requirements for exterior work on single‑ and two‑family residences appear in the ordinance’s performance standards: exterior changes requiring a building permit must be consistent with the residential design guidelines adopted by the city — see § 12.84.180(A)(8). § 12.84.180 .
State-level special provisions for historic buildings (the California Historical Building Code) are relevant to qualified historical properties; see the California historical building code definitions and treatments in the retrieved state document. California Historical Building Code (definitions & approach) .

If you are looking for a labeled local “Historic Overlay District” or a local landmark/landmark nomination and designation procedure in San Bruno’s zoning code, that procedural text is Not found in retrieved materials. Verify with the city’s Planning/Community Development Department.

District-by-district (how the ordinance’s zoning districts treat historic/resource issues)

Below I list each major district from the ordinance, summarize the district purpose / typical uses, call out the decision-relevant dimensional standards, and state which preservation‑relevant controls (architectural review, references to design guidelines, ADU exceptions) appear in the code snippets retrieved. Bolded district names and standard numbers emphasize what you’ll scan for.

Note: the city’s master list of district designations is codified at § 12.96.010. § 12.96.010 .

R-1 (Single‑family residential) — R-1

Purpose / typical uses: single‑family homes, accessory structures; accessory dwelling units allowed per Chapter 12.90; limited conditional uses (schools, places of worship) — § 12.96.060. § 12.96.060 .
Key dimensional standards: development standards cross‑refer to § 12.200.040 for setbacks/density (see the R‑1 entry) — § 12.96.060(D). § 12.96.060 .
Preservation controls that apply here: exterior changes to single‑family residences must be consistent with the city’s residential design guidelines (performance standard) — § 12.84.180(A)(8). § 12.84.180 . Architectural review requirements are referenced elsewhere in the code and may be triggered for design/permitting; check Chapter 12.108 for procedure — cross references: see mixed‑use and other district citations to § 12.108. § 12.280.030 .

R-2 (Low‑density residential) — R-2

Purpose / typical uses: single‑ and two‑family dwellings, duplexes, ADUs — § 12.96.070. § 12.96.070 .
Key dimensional standards: development regulations are set out or cross‑referenced (see R‑2 entry and general development standards) — § 12.96.070. § 12.96.070 .
Preservation controls: same design‑guideline requirement for exterior changes applies; ADU parking exception for properties in an “architecturally and historically significant historic district” applies under § 12.90(E)(9)(c)(ii). § 12.84.180 ; § 12.90 .

R-3 (Medium‑density residential) — R-3

Purpose / typical uses: multi‑family, duplex/triplex, ADUs — § 12.96.080. § 12.96.080 .
Dimensional highlights: front setback: 15 ft typical; side: 5–10 ft; rear: 10 ft; maximum coverage: 60% — see § 12.96.080(D). § 12.96.080 .
Preservation controls: projects involving exterior changes are subject to the same design guideline expectations; architectural review may apply depending on permit type and district rules (see Chapter 12.108 references). § 12.84.180 .

R-4 (High‑density residential) — R-4

Purpose / typical uses: apartments, condominiums, residential care — § 12.96.090. § 12.96.090 .
Dimensional highlights: maximum height: 50 ft or 3 stories (whichever more restrictive), minimum lot sizes and setbacks as listed in § 12.96.090(D). § 12.96.090 .
Preservation controls: design consistency requirements; ADU rules apply (Chapter 12.90) including the historic‑district parking exception where relevant. § 12.84.180 ; § 12.90 .

C‑N (Neighborhood commercial) — C‑N

Purpose / typical uses: neighborhood retail and services, subject to controls in the chapter for commercial districts — see § 12.96.100 (district list) and the C‑N chapter for permitted uses. § 12.96.010 .
Preservation controls: where sign and storefront changes are proposed, the ordinance requires architectural/sign review (see Chapter 12.104 and the general architectural review cross‑references) — see § 12.104.220. § 12.104.220 .

A‑R (Administrative & Research) — A‑R

Purpose / typical uses: light industrial, research, large offices; design and setback standards are substantial (see § 12.96.130(D): minimum site 1 acre, front setback 40 ft, max height 40 ft). § 12.96.130 .
Preservation controls: projects in the A‑R district require an architectural review permit per Chapter 12.108 (explicit cross‑reference in § 12.96.130(D)(12)). § 12.96.130 .

M‑1 (Industrial) — M‑1

Purpose / typical uses: warehousing, light manufacturing; dimensional rules: max height typically 35 ft (50 ft on >1‑acre sites), minimum lot 8,000 sq ft, etc. § 12.96.140 / M‑1 D entries. § 12.96.140 .
Preservation controls: architectural review is required for M‑1 projects (see § 12.96.140(D)(10) referencing Chapter 12.108). § 12.96.140 .

O (Open space & conservation) — O

Purpose / typical uses: parks, trails, public open space; rules and uses cross‑referenced; architectural review is referenced — § 12.96.170 and § 12.96.170(D)(6). § 12.96.170 .

P‑D and other overlays (Planned Development, Bayhill, Mixed‑Use districts) — P‑D, CBD, TOD‑S, TOD‑1, TOD‑2, MX‑R, BRO/BNC/BR/BMU

Purpose / typical uses: mix of high‑intensity, transit‑oriented, and Bayhill specific plan districts (detailed standards in respective chapters) — district list in § 12.96.010 and mixed‑use development standards in § 12.280.030 (mixed‑use table with maximum heights and setbacks). § 12.96.010 ; § 12.280.030 .
Key preservation‑relevant rules: mixed‑use projects require an architectural review permit (see § 12.280.030(A)). Transit corridor and specific plan districts have layered design standards and stepbacks that can affect historic‑sensitive treatment — see the mixed‑use tables for maximum heights (e.g., 55–70 ft) and front setbacks. § 12.280.030 .

Most decision‑relevant standards & uses (quick reference)

Issue / Standard	What the code says (short)	Code Reference
Architectural review required for mixed‑use projects	An architectural review permit is required for mixed‑use projects—see Chapter 12.108 for the permit process and findings.	§ 12.280.030
ADU parking exception in historic districts	No on‑site parking required for an ADU located within an architecturally and historically significant historic district.	§ 12.90 (E)(9)(c)(ii)
Design consistency for SFR exterior work	All exterior changes to a single‑family or two‑family residence requiring a building permit must be consistent with the adopted residential design guidelines.	§ 12.84.180(A)(8)
District list / zoning map	City districts and map are established and the map is part of the ordinance; changes follow zoning map amendment procedure.	§ 12.96.010–12.96.020
State historic building code applicability	Qualified historical buildings are addressed under the California Historical Building Code; state definitions and treatments apply to qualified properties.	California Historical Building Code definitions & guidance

Practical guidance for applicants (plain-English synthesis)

Assume that significant exterior work, additions, or new construction that could affect character will trigger the city’s architectural review processes: several district chapters explicitly require an architectural review permit and the city’s design guidelines are enforceable for residential exterior changes — see § 12.280.030 and § 12.84.180(A)(8). § 12.280.030 § 12.84.180 .
If you plan an ADU, check the ADU chapter carefully: if your property is inside an architecturally and historically significant historic district, San Bruno’s ADU rules explicitly waive on‑site parking — but the code does not include the designation process or map for such historic districts in the retrieved materials. § 12.90 (E)(9)(c)(ii) . Verify district status with Planning.
For life‑safety and code compliance on historic structures, the California Historical Building Code procedures and terms are relevant for a qualified historic building — see the state guidance retrieved. California Historical Building Code definitions & guidance .

Checklist

Confirm whether the parcel is in a designated historic district or listed locally (Not found in retrieved materials; Verify with the jurisdiction).
For proposed exterior work, confirm whether an architectural review permit is required; prepare design materials consistent with the city’s residential design guidelines; reference Chapter 12.108 when filing permit forms. § 12.280.030 § 12.84.180(A)(8) .
If proposing an ADU, document whether the property is within an “architecturally and historically significant historic district” to see if the ADU parking exception applies (§ 12.90 (E)(9)(c)(ii)). § 12.90 .
Assemble elevations, material samples, and narrative demonstrating consistency with design guidelines (the code requires design consistency for single/two‑family exterior changes) — § 12.84.180(A)(8). § 12.84.180 .
For larger projects in mixed‑use or specific plan areas, confirm applicable stepbacks, maximum heights, and FAR from the mixed‑use tables and plan chapters and include those in your submittal — § 12.280.030. § 12.280.030 .
If the property may qualify as a “qualified historical building” for state code relief, consult the California Historical Building Code and the city’s building official early in the process. California Historical Building Code guidance .

Risks & Ambiguities

Issue	Why it matters	What to verify
No local landmark/overlay procedure found	Without a local designation process in the retrieved materials, it is unclear how a property becomes a recognized local historic resource and who makes that determination	Confirm with the Community Development Department whether a local list, survey, or historic overlay exists (Not found in retrieved materials)
“Architecturally and historically significant historic district” — undefined in retrieved text	The ADU parking exception depends on this phrase; without a map or definition you can’t determine ADU parking obligations	Ask Planning for an official map or list of historic districts; request written confirmation if you plan an ADU (§ 12.90)
Chapter 12.108 (Architectural review) text not included in retrieved excerpts	Architectural review is the key local control but the procedural triggers, submittal list, and approval findings are in Chapter 12.108, which was not returned in full	Obtain Chapter 12.108 directly from the city to confirm submittal requirements and appeals process (cross‑refs in many district chapters, e.g., § 12.280.030) § 12.280.030
How state historical code applies locally	Applicants may be eligible for alternative compliance paths under state historic code but the local process to apply it (and who makes the determination) is not described in the retrieved municipal text	Discuss the California Historical Building Code early with the building official and planning staff; see state definitions and procedures in the California document. California Historical Building Code guidance
Parcel‑specific zoning/district rules	District chapters and the zoning map control allowed work; the map is part of the ordinance but parcel status must be checked	Verify the parcel’s zoning and any specific plan overlays (zoning map as part of the ordinance, § 12.96.020) § 12.96.020

Plain‑English summary

San Bruno does not publish a standalone historic‑preservation chapter in the retrieved zoning materials; instead preservation outcomes are primarily handled through the city’s architectural review and design‑guideline requirements, with a narrow ADU parking exemption for properties that are in an “architecturally and historically significant historic district.” Confirm whether your property is on any local historic list and obtain Chapter 12.108 and the Planning Department’s procedures before designing work. Verify with the jurisdiction.

Source References

San Bruno Municipal Code, mixed‑use development standards: § 12.280.030 .
San Bruno Municipal Code, architecture/design performance standards (residential exterior changes): § 12.84.180(A)(8) .
San Bruno Municipal Code, ADU rules (parking exception for historic districts): § 12.90 (E)(9)(c)(ii) .
San Bruno Municipal Code, district list and zoning map: § 12.96.010–§ 12.96.020 .
San Bruno Municipal Code, R‑1 district description: § 12.96.060 .
San Bruno Municipal Code, R‑3, R‑4, and other district development rules: § 12.96.080, § 12.96.090, § 12.96.130 (A‑R), § 12.96.140 (M‑1) .
San Bruno Municipal Code, sign & architectural sign review: § 12.104.220 .
California Historical Building Code (state guidance on qualified historical buildings and treatments) — definitions & applicability (state doc retrieved): California Historical Building Code guidance .

Inline internal links (first natural mention of each topic):

For parking rules see the San Bruno Parking page. (/us/california/san-bruno/parking)
For setbacks and development standards see the San Bruno Development Standards page. (/us/california/san-bruno/development-standards)
For design review procedures see the San Bruno Design Review page. (/us/california/san-bruno/design-review)
For overlay districts (e.g., Bayhill, transit overlays) see the San Bruno Overlay Districts page. (/us/california/san-bruno/overlay-districts)
For accessory dwelling unit specifics see the San Bruno ADUs page. (/us/california/san-bruno/adu)
For the state code that governs historic building alternatives see the California Building Standards Code page. (/us/california/building-codes)

Sources

Retrieved passages

San Bruno Zoning Code (§ 12.280.030.) Medium relevance
San Bruno Zoning Code (section 4) Medium relevance
San Bruno Zoning Code (§ 65915) Medium relevance
San Bruno Zoning Code (§ 27-7.17) Medium relevance
San Bruno Zoning Code (§ 4) Medium relevance
San Bruno Zoning Code (§ 27-7.18) Medium relevance
San Bruno Zoning Code (Article II) Medium relevance
San Bruno Zoning Code (Section 12.96.205.E.) Medium relevance
San Bruno Zoning Code (§ 12.84.160.) Medium relevance
San Bruno Zoning Code (§ 27-9.21) Medium relevance
San Bruno Zoning Code (§ 1) Medium relevance
San Bruno Zoning Code (§ 3) Medium relevance
San Bruno Zoning Code (§ 27-7.8) Medium relevance
San Bruno Zoning Code Medium relevance
San Bruno Zoning Code Medium relevance
San Bruno Zoning Code (Chapter 12.205.) Medium relevance
San Bruno Zoning Code (Section 12.96.060.C.) Medium relevance
San Bruno Zoning Code (§ 27-11.5) Medium relevance

Cited sections

Official San Bruno code library

Frequently asked questions

What is San Bruno’s official process for designating a local landmark or historic district?

The retrieved zoning materials do not include a local landmark or historic‑overlay designation procedure (Not found in retrieved materials). The code references “architecturally and historically significant historic district(s)” (used for ADU parking rules) but does not publish the designation steps or a map; confirm with San Bruno Community Development/Planning for the official designation list or process. § 12.90 (E)(9)(c)(ii)

Do I need design review for exterior changes to my single‑family house in San Bruno?

Exterior changes that require a building permit must be consistent with the city’s residential design guidelines; many district chapters and performance standards require design consistency and architectural review may be triggered depending on the permit and district — see § 12.84.180(A)(8) and the cross‑references to Chapter 12.108 for architectural review procedures. § 12.84.180

If my home is historic, does San Bruno relax any building standards?

The municipality’s ADU rules specifically recognize properties in an “architecturally and historically significant historic district” for parking exceptions, and the California Historical Building Code provides state processes for qualified historic buildings; however, the local zoning excerpts retrieved do not provide a general local relaxation mechanism — consult the building official for California Historical Building Code application and the Planning Department for local allowances. § 12.90 California Historical Building Code guidance

If I build an ADU, do I need to provide parking if my house is historic?

San Bruno’s ADU chapter waives on‑site parking if the ADU is located within an architecturally and historically significant historic district — however, the ordinance text does not provide the district map or the designation process in the retrieved materials, so you must verify district status with Planning. § 12.90 (E)(9)(c)(ii)

Which zoning districts require architectural review that could affect historic resources?

Multiple district chapters explicitly cross‑reference the architectural review permit in Chapter 12.108 (for example mixed‑use § 12.280.030, A‑R § 12.96.130(D)(12), M‑1 § 12.96.140(D)(10), O § 12.96.170(D)(6)). Architectural review triggers are district‑ and project‑specific; check Chapter 12.108 and the district chapter that applies to your parcel. § 12.280.030 § 12.96.130

Where can I find the mixed‑use height, stepback and setback standards that might constrain additions near historic buildings?

The mixed‑use development table and supplemental development standards (including maximum heights and setbacks/stepbacks) are in the mixed‑use chapter § 12.280.030; projects in these districts also require architectural review. § 12.280.030

Can the California Historical Building Code be used in San Bruno for qualified historic buildings?

Yes — the California Historical Building Code provides alternative compliance approaches for qualified historical buildings at the state level (definitions and procedures in the state document). Coordinate with the city’s building official to apply state historical provisions locally. California Historical Building Code guidance

Where do I confirm whether my property is inside a San Bruno historic district?

The zoning documents retrieved do not include a historic district map or local designation procedure (Not found in retrieved materials). Contact San Bruno Community Development/Planning and request the city’s official historic resources map or list; the zoning map is codified at § 12.96.020. § 12.96.020

Does sign or storefront alteration in commercial districts require special review for historic properties?

Sign approvals and architectural review for signs are handled under the sign chapter; the community development director must find size/shape/scale compatible and the planning commission handles deviations — see § 12.104.220. For historic resources, architectural review findings will be relevant. § 12.104.220

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