Local zoning · San Bruno

San Bruno — Variances and Exceptions

Q: If I need a reduced front setback to deepen my garage for parking, is there an exception instead of a variance?

Possibly. § 12.84.170 includes targeted parking/front‑yard exceptions for garage projection, garage door recessing, and uncovered front/side parking in designated high‑parking‑demand areas — these are administrative exceptions distinct from a variance. Verify whether your property lies in a council‑designated high‑parking‑demand area.

Variances and Exceptions under the San Bruno local zoning and planning code, with the controlling citations.

Ask a question free See coverage

Last reviewed: July 2, 2026

Overview

Variances in San Bruno are discretionary adjustments to strict zoning standards decided primarily by the Planning Commission; they are tightly circumscribed by findings the commission must make and may not be used to permit uses that the zoning districts do not already allow. The code also provides several targeted exceptions and administrative waivers (for parking, parcel maps, planned-unit developments, ADU development‑standard waivers, etc.) that operate differently than a variance and are handled by different decisionmakers. Key variance rules appear in § 12.124.010–.060; parcel-map waivers and parking exceptions are in other chapters cited below.

How variances work in San Bruno (plain process & legal limits)

Who decides: the Planning Commission may grant variances; the community development director accepts applications and schedules hearings. § 12.124.010 and § 12.124.030–.040 set the process.
Required findings: before a variance can be granted the commission must find that special circumstances of the property (size, shape, topography, location, surroundings) would deprive the parcel of privileges enjoyed by similar properties in the same zone; that conditions will prevent the variance from being a special privilege; and for single‑family/two‑family projects, the project must conform to the city’s residential design guidelines. See § 12.124.010.
Limits on scope: a variance cannot authorize a use that is not expressly allowed in the underlying zoning district (no “variance to permit an otherwise prohibited use” — § 12.124.020).
Application materials & public hearing: applications must include an explanation justifying the findings, scaled site plans, parking and circulation info, landscape plans, elevations, and other materials the director deems necessary; hearings are noticed under Chapter 12.132 and scheduled within one year of filing. See § 12.124.030–.040.
Conditions & concurrent review: the commission may impose reasonable conditions; if the variance triggers an architectural review permit the review will be concurrent. See § 12.124.050–.060.
Administrative alternatives (not variances): specific code sections allow narrower, purpose‑limited exceptions/waivers handled administratively — for example, parcel‑map waivers (subdivision map requirements), parking/setback exceptions for existing substandard residential garages, and ADU development‑standard waivers. See § 12.28.020(C), § 12.84.170, and § 12.90.050(E) respectively.

Note: design review, parking calculations, and development standards interact with the variance process — see the linked topics below for how those reviews run in parallel on many projects.

District-by-district breakdown (what matters for variances and exceptions)

The San Bruno ordinance establishes many district labels; where the code gives explicit district standards or tables we summarize those rules below and cite the controlling sections. For districts where specific permitted‑use tables or dimensional standards were not retrieved from the supplied materials, the entry notes that and points you to verify directly. All district names below are taken from § 12.96.010.

R-1 (Single‑family residential) — R-1

Purpose / where it applies: traditional single‑family neighborhoods as designated on the zoning map (see § 12.96.010).
Typical permitted uses: single‑family dwellings, typical residential accessory uses (see district regulations and definitions in Title 12). Not all use lists were retrieved here. Verify with the jurisdiction. Not found in retrieved materials for a complete uses list.
Key dimensional standards (decision-relevant): minimum site area 5,000 sq ft interior / 6,000 sq ft corner, front setback 15 ft (garage/front sidewalk rules: garage setback measured at 20 ft from sidewalk to garage face), interior side setback 5 ft, rear setback 10 ft; maximum lot/impervious coverage and floor area rules are in § 12.200.030. These numbers matter because variances are commonly sought to alter setbacks or coverage.
Where to look for exceptions: setbacks have exceptions referenced in § 12.84.170 (see parking/front-yard exceptions) and architectural review findings may apply to deviations.

R-2 (Low‑density residential) — R-2

Purpose / where it applies: low‑density multifamily and duplex locations listed on the zoning map.
Typical permitted uses: duplexes and low‑density residential uses; full use table not included in retrieved snippet — verify with the code. Not fully found in retrieved materials.
Key dimensional standards: minimum lot width 50 ft (60 ft corner); interior side setback 5 ft (with reduced setbacks allowed on legal substandard lots per formula); front setback 15 ft; maximum coverage/impervious limits differ from R-1 — see § 12.200.030 for the full formulaic floor‑area rules.

R-3, R-4 (Medium & high density residential) — R-3, R-4

Purpose / typical uses: multifamily housing at increasing densities; specific permitted uses and numeric standards were not fully retrieved here. Verify with § 12.96.080 and § 12.96.090 and district development regulations. Not found in retrieved materials for full numeric summary.

C‑N (Neighborhood commercial) — C‑N

Purpose / typical uses: neighborhood‑serving retail and services. The ordinance establishes the district in § 12.96.100; explicit permitted‑use and dimensional extracts were not retrieved. Verify with the code.

A‑R (Administrative & Research) — A‑R

Purpose: office / research land uses; detailed numerical standards not retrieved here. Verify with the code.

M‑1 (Industrial) — M‑1

Purpose: industrial and light‑industrial uses; detailed spacing and standards not retrieved. Verify with the code.

O (Open space & conservation) — O

Purpose: open space and conservation. Specific numeric standards not retrieved. Verify with the code.

U (Unclassified) — U

Purpose / application: parcels not assigned to a district. See § 12.96.010. Verify with the zoning map.

P‑D (Planned Development), ES (Emergency Shelter overlay), CBD (Central Business District), TOD‑S — P‑D, ES, CBD, TOD‑S

Purpose: special districts and overlays with tailored regulations. Planned-unit/PD processes allow specific exceptions as part of approvals; see the planned unit provisions § 12.116.050–.080 for exception authority and required conformance to the General Plan.

Mixed‑use and Transit‑oriented districts — TOD‑1, TOD‑2, MX‑R, CBD, TOD‑S

Key decision standards: Table 12.280-2 contains height, maximum FAR, setback and stepback rules for CBD / TOD / MX districts (maximum heights vary by district: e.g., CBD up to 55 ft/4 stories, TOD‑S up to 65–90 ft in parts of the district). These numeric standards are central to variance requests for height, stepbacks, and FAR. See § 12.280.030 and Table 12.280‑2.

Bayhill Specific Plan districts — BRO, BNC, BR, BMU

Purpose / where it applies: Bayhill shopping/office area — the Bayhill Specific Plan sets its own permitted uses and design standards. Table 12.290‑1 and 12.290‑3 give permitted uses, minimum lot sizes and setbacks (for example BRO min lot 35,000 sq ft, BNC min lot 25,000 sq ft; setbacks 10 ft min / 30 ft average on several frontages; max height 50 ft or 3 stories per the city height cap). Exceptions to greenway widths and other Bayhill‑specific exceptions are allowed where public benefit is demonstrated. See § 12.290.040–.070 and Table 12.290‑3.

Quick reference table — key rules and where to find them

Topic	Quick rule	Code reference
Variance findings required	Must show special circumstances; cannot grant a variance to allow a use not permitted in the district	§ 12.124.010, § 12.124.020
Variance application contents	Application form, narrative on findings, scaled site plan, parking, elevations, landscape, extra materials as required	§ 12.124.030
Hearing / notice	Planning Commission hearing scheduled within one year; notice per Chapter 12.132	§ 12.124.040
Architectural review tie‑in	If architectural review is required, it is processed concurrently	§ 12.124.050
Parcel map waiver (subdivision)	Director may waive parcel map if minimum standards are met (area, roads, drainage, water, sanitation, environmental protection)	§ 12.28.020(C)
Parking & front yard exceptions	Targeted exceptions for garage projection, driveway/garage recess, uncovered side/front parking in specified high‑demand areas	§ 12.84.170
ADU development standard waivers	Lot coverage, FAR, impervious surface and lot size waivers to allow ADUs up to code maximums; specific setbacks defined	§ 12.90.050(E)
Planned Unit permit exceptions	Planned units may be excepted from district development standards to extent shown in approved plans	§ 12.116.050–.060

Checklist — what an applicant must submit or demonstrate (variance-specific)

Completed city variance application form and required fee (see planning counter materials). § 12.124.030
Written narrative addressing the three findings in § 12.124.010 (special circumstances, no grant of special privilege, residential design guideline conformance when required). § 12.124.010
Scaled site plan showing lot lines, setbacks, existing/proposed buildings, parking, circulation, driveway/curb cuts, easements, drainage and grading. § 12.124.030(C)
Architectural elevations, materials, color board (if architectural review required). § 12.124.030(D–E), § 12.124.050
Landscape plans and any required environmental or technical reports depending on site complexity. § 12.124.030
Owner authorization and legal description/title report. § 12.124.030
If seeking relief related to parking, confirm whether a targeted administrative exception under § 12.84.170 is available and whether the property lies in a high‑parking‑demand area. § 12.84.170
Be prepared for concurrent design review if required — projects in R‑1/R‑2 that request deviations may need additional findings under architectural review. § 12.108.030

(Verify submission checklists and current fee schedule with the Community Development Department. Verify with the jurisdiction.)

Risks & Ambiguities

Issue	Why it matters	What to verify
Variance to allow a prohibited use	The code explicitly prohibits variances that would authorize a use not allowed in the zoning district — a common misunderstanding	§ 12.124.020; confirm that the requested change is a dimensional/operational adjustment and not a new use.
Overlap with architectural/design review	Single‑family or two‑family projects require design‑guideline conformance as an extra finding; failing this can doom a variance	§ 12.124.010(C) and § 12.108.030; verify whether the project triggers concurrent design review.
Parcel‑map waiver vs. variance	A parcel‑map waiver (subdivision) is administrative and has different findings/standards than a variance	§ 12.28.020(C); check whether your need is about lot division (waiver) or dimensional relief (variance).
ADU state law interactions	The ADU section waives some city development standards; ADU requests sometimes avoid variances entirely because the code grants targeted waivers	§ 12.90.050(E); verify ADU-specific standards and state ADU law applicability.
Time & appeal windows	Processing timelines (hearing within one year) and appeal rights are strictly set; missing procedural steps can delay or invalidate approvals	§ 12.124.040 and Chapters 12.78 (appeals/expiration). Verify deadlines with the city.
Parcel-specific factual findings	Many findings hinge on parcel topography/adjacent development; conclusions are evidence‑driven	Findings require substantial evidence; always verify with the jurisdiction and be ready to document special circumstances. Not a code text issue but an evidentiary requirement.

Practical guidance (plain-English)

If you need to reduce a setback, exceed lot coverage, or adjust a numeric standard in San Bruno, you’ll be applying for a variance to the Planning Commission under § 12.124; prepare a site‑specific, photo‑and‑plan backed narrative showing why the property is uniquely constrained and address the required findings. If your issue is narrowly about parking, a garage projection, an ADU, or a parcel‑map requirement, first check whether the code provides a targeted exception or administrative waiver (these are faster and use different standards) — see § 12.84.170, § 12.90.050(E), and § 12.28.020(C).

For more on how variances interact with site design and parking rules, consult the San Bruno pages on parking, development standards, design review, overlay districts, and ADUs. Also check the city’s main Zoning and Land Use pages for zoning maps and district locations.

Source References

San Bruno Municipal Code, Chapter 12, Article III (Zoning) — Variances: § 12.124.010–.060 (variance findings, limits, application, hearing, architectural review).
Parcel map waiver and subdivision waivers: § 12.28.020(C).
Parking/front‑yard exceptions (garage/driveway / uncovered parking exceptions): § 12.84.170.
Planned Unit Permit exceptions and standards: § 12.116.050–.080.
R‑1 / R‑2 development and dimensional standards (setbacks, lot size, coverage, FAR rules): § 12.200.030.
Bayhill Specific Plan districts (BRO, BNC, BR, BMU): Tables and standards in § 12.290.040–.070 and Table 12.290‑3.
ADU waivers and ADU standards: § 12.90.050(E) and related subsections.
Architectural review findings that can apply to residential variances: § 12.108.030.

Internal reference pages used for cross‑links in this guide:

San Bruno Zoning — for district maps and basic zone descriptions
San Bruno Land Use
San Bruno Development Standards
San Bruno Parking
San Bruno Design Review
San Bruno Overlay Districts
San Bruno ADUs
California Building Standards Code (referenced for building/fire code matters; building‑code requirements are outside the scope of this page)

Information Gaps

Full permitted‑use lists and every numeric dimensional standard for many districts (R‑3, R‑4, C‑N, A‑R, M‑1, O, U) were not fully present in the retrieved excerpts — verify specific permitted uses and numeric standards in each district’s section (e.g., § 12.96.080, § 12.96.090, § 12.96.100, etc.). Not found in retrieved materials.
Precise fee amounts, application form templates, and current council resolutions designating “high parking demand areas” (which control § 12.84.170 exceptions) are not included here. Verify with the Community Development Department. Not found in retrieved materials.

Sources

Retrieved passages

San Bruno Zoning Code (§ 12.116.080.) High relevance
San Bruno Zoning Code (§ 27-12.6) High relevance
San Bruno Zoning Code High relevance
San Bruno Zoning Code (§ 27-14.1) High relevance
San Bruno Zoning Code (§ 3) Medium relevance
San Bruno Zoning Code (§ 3) Medium relevance
San Bruno Zoning Code (chapter may) Medium relevance
San Bruno Zoning Code (§ 12.28.020.) Medium relevance
San Bruno Zoning Code (§ 3) Medium relevance
San Bruno Zoning Code Medium relevance
San Bruno Zoning Code (§ 3) Medium relevance
San Bruno Zoning Code (§ 3) Medium relevance
San Bruno Zoning Code (§ 3) Medium relevance
CFC § 12.90.050 (§ 12.90.050.) Medium relevance

Cited sections

Official San Bruno code library

Frequently asked questions

What findings must the Planning Commission make to approve a variance in San Bruno?

The commission must find (1) special circumstances of the property (size, shape, topography, location or surroundings) create hardship compared to similar properties, (2) conditions will prevent the grant being a special privilege inconsistent with neighboring properties, and (3) for single‑family or two‑family projects, the project conforms to the city's residential design guidelines. See § 12.124.010.

Can a variance allow a use that the zoning district otherwise prohibits?

No. A variance may not be used to authorize a use or activity that is not expressly permitted in the zoning district. That prohibition is explicit in § 12.124.020.

What materials do I need with a variance application in San Bruno?

Typical materials include the city application form, a narrative addressing the findings, scaled site plans showing setbacks and parking, landscape plans, building elevations, and any technical reports the director requests. See § 12.124.030.

If I need a reduced front setback to deepen my garage for parking, is there an exception instead of a variance?

Possibly. § 12.84.170 includes targeted parking/front‑yard exceptions for garage projection, garage door recessing, and uncovered front/side parking in designated high‑parking‑demand areas — these are administrative exceptions distinct from a variance. Verify whether your property lies in a council‑designated high‑parking‑demand area.

Do ADUs in San Bruno require variances for lot coverage, FAR, or setbacks?

The ADU chapter authorizes specific development‑standard waivers so that an ADU meeting the ADU rules can be allowed (waivers for lot coverage, FAR, impervious surface and lot size to permit ADUs up to the ordinance maximums). See § 12.90.050(E). That often eliminates the need for a variance for ADUs that comply with ADU section criteria.

How soon will my variance be heard?

After filing the community development director must set a public hearing before the Planning Commission not later than one year from filing. Notice is given under Chapter 12.132. See § 12.124.040.

Will design review be required with a variance for an R‑1 home?

If the project would require an architectural review permit, the two reviews are processed concurrently; and for R‑1/R‑2 projects the architectural review findings include an additional finding about the extent of proposed variation from development regulations. See § 12.124.050 and § 12.108.030.

Can a subdivision parcel map requirement be waived instead of seeking a variance?

Yes. The community development director may waive the parcel map requirement if the proposed division complies with area, roads, drainage, sanitation, water, environmental protection and other Subdivision Map Act‑based requirements. See § 12.28.020(C).

If I’m in a Bayhill district (BRO/BNC/BR/BMU), how do variances and exceptions interact with the Specific Plan?

The Bayhill Specific Plan establishes its own permitted uses and numeric standards (Table 12.290‑1 and Table 12.290‑3). Specific Plan standards govern and the Specific Plan includes its own exception criteria (e.g., greenway width exceptions) — variances affecting Bayhill standards will need to satisfy Specific Plan findings as well as the standard variance findings. See § 12.290.040–.070 and Table 12.290‑3.

If my variance is denied, can I appeal?

Yes — appeals procedures for planning decisions are set out in Chapter 12.78 (appeals and extension/expiration rules). Verify appeal timelines and fees with Community Development. Noted throughout Title 12 approvals.

Ask about any San Bruno property

Get a cited, plain-English answer on San Bruno zoning, setbacks, FAR, ADUs and permits — for any address.

Start Free Trial