Local zoning · San Francisco County

San Francisco County — Variances and Exceptions

Q: What is the primary test for getting a variance in San Francisco County's unincorporated areas?

A variance requires the Zoning Administrator to make five written findings: (1) exceptional or extraordinary circumstances unique to the property or intended use; (2) literal enforcement would cause practical difficulty or unnecessary hardship; (3) the variance is necessary to preserve a substantial property right of the subject property; (4) granting it will not be materially detrimental to public welfare or adjacent properties; and (5) it will be in harmony with the Planning Code and not adversely affect the General Plan — see § 305(c) .

Q: Can I use a variance to change the allowed use on my lot?

No. The Code prohibits variances that would amount to a reclassification or that would permit any use, height, bulk, or sign not expressly allowed in the applicable district. Where the Code provides a conditional‑use or exception route, you must typically use that route rather than a variance ( § 305(a) ).

Q: When is a Planning Commission exception used instead of a variance?

Planning Commission exceptions are used where the district or program text specifically grants the Commission authority to modify Code provisions (for example, HOME‑SF exceptions listed in § 328(d) ). Exceptions often have their own findings (for HOME‑SF, see § 328(e) ) and may require different analysis than the five variance findings.

Q: Will a variance automatically reduce requirements like open space or parking?

Possibly, but there are limits. Certain mandatory requirements (inclusionary housing, some open‑space rules in specified districts, and some bicycle‑parking or TDM requirements where auto parking exists) may not be waived by variance ( § 305(a) ). Where an exception or variance reduces required usable open space in certain districts, in‑lieu fees under § 427 may apply.

Q: Can the Zoning Administrator grant a variance without a public hearing?

The Zoning Administrator may at their option hold or not hold a hearing when the variance involves a deviation of less than 10% from the Code requirement, but the ZA can still require a hearing; and certain standards (such as per‑unit parking requirements) are not eligible for “under 10%” administrative variances. See § 305(c) and the printed interpretations.

Q: If my building is a legal noncomplying structure, do I need a variance to expand it?

You generally seek the variance only for the specific quantitative standard being violated (for example, a rear‑yard encroachment), not for the noncomplying structure article itself. The Code treats the variance as relief from the underlying quantitative standard; see the interaction between § 188 and § 305 in the interpretations.

Q: Are there district examples where special height/bulk exceptions are standard?

Yes. Several Special Use Districts (Scott Street Senior Housing SUD, Haight Street Senior Affordable Housing SUD, Fourth & Freelon) create express exception paths to increase height/bulk for qualifying affordable or senior housing, and those exceptions are approved under conditional‑use or SUD procedures (see the SUD provisions and § 303 /SUD cross‑references).

Q: If I seek to reduce open space under HOME‑SF, will I owe money?

Yes — in many Eastern Neighborhoods subdistricts and in C‑3‑O(SD) , a project that obtains a variance or Planning Commission exception to provide less usable open space than required must pay an in‑lieu fee; the amounts and fund destinations vary by subdistrict and are listed in § 427 .

Q: Does variance relief affect California building code (Title 24) requirements?

No — variances under the Planning Code adjust planning/zoning quantitative standards, not the California Building Standards Code. Any construction still must comply with the California Building Standards Code . Verify separate building‑permit requirements with DBI. Not found in retrieved materials for Title 24 interactions; verify with the jurisdiction.

Q: Where do I look for appeal rules or timelines if the ZA denies my variance?

Appeals and timelines are handled per the Code’s appeal provisions; § 305(c) notes that a ZA decision becomes effective 10 days after the written decision unless a valid appeal is filed under the appeal rules (see § 308.2 for Board of Appeals procedures).

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

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Last reviewed: July 3, 2026

Overview

Variances and exceptions for development in the unincorporated areas of San Francisco County are handled under the local Planning Code procedures for relief from quantitative standards and for special deviations controlled by particular districts or special-use rules. Variances (administrative relief from numeric standards) are adjudicated by the Zoning Administrator and follow the formal findings listed in § 305; Planning Commission exceptions and program-specific exceptions (for example, under the HOME‑SF program) carry separate findings in § 328 and related subsections.

Note: this page treats those rules as applying to the county’s unincorporated areas; verify parcel‑specific jurisdictional questions with the Planning Department. Verify with the jurisdiction.

(First related-topic links: parking, setbacks/development standards, design review, overlay districts, ADUs, the state building code, nonconforming uses are linked inline in the sections below.)

How the Code treats Variances vs. Exceptions (short summary of legal framework)

Variance (administrative): Relief from the strict application of quantitative standards (setbacks, lot coverage, floor‑area ratios, etc.) that does not reclassify a property or authorize a prohibited use. The Zoning Administrator (or designee) hears and decides variance applications under § 305; procedures are further described in §§ 306–306.5.
Exception (Planning Commission / program exceptions): District- or program-specific deviations (for example, special height/bulk exceptions in special use districts or HOME‑SF exceptions) that are granted under the Planning Commission procedures in the applicable sections (see § 328, § 329, and district-specific provisions). These often require different findings tailored to the program or district.
Waivers / reductions (other boards): For certain development‑fee or impact obligations, the Board of Supervisors hears appeals for a waiver/reduction under § 406.
Limits on what can be varied: The Code expressly forbids variances that would amount to a reclassification (new use), allow prohibited uses, change definitions, or waive certain mandatory requirements such as inclusionary housing, certain open‑space minimums in specified districts, or most sign/height/use authorizations. See § 305(a) for the list of prohibitions.

District-by-district breakdown

Below are district‑level notes where the Planning Code gives district‑specific rules for granting exceptions or allows variances subject to special constraints. Each district subsection gives the purpose (as stated in the Code or its heading), typical uses (as applied in the Code language), key dimensional standards or program constraints, and where that district rule applies in the Code.

RH‑1 (single‑family residential)

Purpose: preserve single‑family character and lot patterns; referenced as the baseline for height/rear‑yard provisions in several special districts.
Typical permitted uses: single‑family residences (the Code treats RH‑1 provisions as the starting point in special districts). Not found in retrieved materials for a complete use table; Verify with the jurisdiction.
Key dimensional standards: special districts may substitute different rear‑yard and height rules; for example, the Dolores Heights Special Use District substitutes rear‑yard and height rules and limits height to 35 ft (see § 241). Variances from those rear‑yard and height provisions may be granted under § 305 but cannot exceed the RH‑1 district height ceilings.

RM‑1 / Presidio‑Sutter Special Use District

Purpose: permit residential development with allowances to further affordable housing goals in the Presidio‑Sutter area. The district states that RM‑1 standards continue to apply except where modified.
Typical permitted uses: RM‑1 residential uses; modifications for affordable housing may allow height and density bonuses under the special rules.
Key standards & exception rules: the Planning Commission may approve height increases and density bonuses for qualifying affordable housing projects; any exception or modification must meet the district’s affordability and findings standards in § 249.54 and related subsections.

NC‑3 (Neighborhood Commercial) / Japantown Special Use District

Purpose: NC‑3 controls remain the baseline for certain special districts; the Japantown Special Use District uses NC‑3 controls with added design and conditional use controls to preserve neighborhood character.
Typical uses: mixed commercial/residential along corridors; conditional use authorization thresholds and special design controls apply (see § 249.31).
Variance/exception context: where exceptions or conditional uses are available, the Code prefers the exception/conditional use route over variances (see discussion under § 305(a) and related interpretations).

C‑3‑O(SD) and Eastern Neighborhoods Mixed Use Districts

Purpose: higher‑intensity commercial and mixed‑use areas; Eastern Neighborhoods Mixed Use Districts are subject to HOME‑SF and other program rules.
Typical uses: commercial, office, multi‑unit residential; program incentives for affordable housing appear in § 206.3 and related HOME‑SF language. Not all permitted‑use lists are in retrieved excerpts; Verify with the jurisdiction.
Key exception rules: projects that obtain a Variance pursuant to § 305 or an exception pursuant to § 329 to provide less usable open space than required by § 135 must pay in‑lieu fees in certain subdistricts; the in‑lieu fee schedule is set out in § 427 (amounts vary by subdistrict; e.g., $327/sf in Eastern Neighborhoods generally; $890/sf in Central SoMa for certain options; $1,410/sf in C‑3‑O(SD) when exceptions reduce required open space).

Special height and bulk / Senior‑housing districts (Scott Street, Haight Street, Fourth & Freelon)

Purpose: promote affordable or senior housing by allowing controlled increases in height/bulk where specified social policy objectives are met.
Standards: e.g., Scott Street Senior Housing Special Use District allows exceptions to underlying height limits up to a specified maximum (subject to § 249.23 procedures and § 303 conditional‑use criteria). Haight Street Senior Affordable Housing SUD permits exceptions to the 40‑X limit up to 60‑X under conditional‑use procedures. Variances/exceptions in these SUDs follow the SUD criteria and the conditional‑use findings as well as § 305 where cross‑referenced.

North of Market (Noe‑Market) and Rear‑yard waivers

Purpose: provide site‑specific flexibility in dense areas using administrative waivers. The Code permits rear‑yard waivers for certain districts to be processed using variance procedures, but the findings and tests applied may be different than the five variance findings in § 305 (see § 134(i–k) interpretations). In short, a rear‑yard waiver uses the same application/notice/appeal mechanics as a variance but sometimes requires distinct findings set by the subsection that authorizes the waiver.

Key code standards and practical impacts (decision table)

Action / Topic	Decision authority	What the decision must find	Prohibitions / limits	Code Reference
Grant a variance from numeric standard	Zoning Administrator (or designee)	The five variance findings: exceptional circumstances; hardship from literal enforcement; necessary to preserve substantial property right; not materially detrimental; in harmony with Code & General Plan	Cannot reclassify property; cannot permit a use/height/bulk/sign not allowed in district; cannot waive inclusionary housing, certain open space, bicycle parking (when auto parking proposed), TDM requirements, etc.	§ 305.
Variance findings (what to show)	Zoning Administrator must state findings in writing	(1) exceptional circumstances; (2) literal enforcement causes practical difficulty; (3) preserves property right; (4) no material detriment; (5) harmony with Code & General Plan	—	§ 305(c).
Exceptions / program deviations (HOME‑SF, SUDs)	Planning Commission (or specified body)	District/program specific findings (e.g., § 328(e) requires compliance with the Code and General Plan and conformity with Use District purpose)	Exceptions limited to those listed in the district/program (see the list under § 328(d) for HOME‑SF examples)	§ 328(d–e).
Appeals	Board of Appeals (per appeal rules)	Appeals follow procedures in § 308.2	Final Zoning Administrator action effective after 10 days unless appealed	§ 305(c) references § 308.2 for appeals.
Fee consequences for reduced open space	Planning Commission grants exception or variance	In‑lieu fees required for lost usable open space in certain subdistricts (Eastern Neighborhoods, Central SoMa, C‑3‑O(SD) — different $/sf amounts)	Payment required as condition of approval	§ 427.

Practical guidance and interpretation notes

If a district or special procedure provides an exception, conditional‑use, or other entitlement, the Code discourages using a variance as a substitute: a variance cannot be used where a conditional‑use or exception process is the Code‑compliant route (interpretation of § 305(a)). In practice you should apply for the exception/conditional use when available; a variance is only appropriate when the exception is inapplicable (e.g., corner‑lot exceptions that only apply to corner lots).
Minor deviations (under 10%) may be eligible for administrative processing without a public hearing at the Zoning Administrator’s discretion; however there are exceptions (for example, parking requirements tied to each unit cannot be relieved by an “under 10%” variance if the standard is per unit). Check the § 305(c) discretion and the related interpretations.
For modifications tied to affordable housing programs (HOME‑SF and similar), the Code provides a specific list of exceptions the Planning Commission may grant (for example, exceptions to usable open space, loading, rear yards, accessory parking) but requires findings that the modification does not substantially alter the allowed building envelope and that the project conforms to the program guidelines. See § 328(d) and § 328(e).
Certain SUDs explicitly authorize exceptions to height and bulk provided the project meets the SUD’s conditional‑use standards (see the Scott Street, Haight Street, and Fourth & Freelon SUD excerpts). Where SUD-specific criteria exist, they govern the Planning Commission’s review.
Administrative waivers for ADUs: the Zoning Administrator may grant partial or complete waivers of density limits, bicycle parking, rear‑yard, exposure, or open‑space standards for ADUs in existing buildings under § 207.1(g) and the ZA variance/waiver authority in § 307(l) (note that such waivers often carry regulatory‑agreement conditions, including rent‑stability recording requirements when rental units exist). Link to ADU law for state rules that also affect ADU approvals.

(Linked resources used in the preceding guidance: San Francisco County Parking; San Francisco County Development Standards; San Francisco County Design Review; San Francisco County Overlay Districts; California ADU law; California Building Standards Code; San Francisco County Nonconforming Uses.)

Checklist (for a variance application)

Confirm that a conditional‑use authorization or a district/program exception is not the proper route (variance cannot substitute where Code provides an exception/conditional use). § 305(a).
Prepare written narrative proving the five variance findings: exceptional circumstances, practical difficulty/unnecessary hardship, preservation of a substantial property right, no material detriment, and consistency with Code & General Plan. § 305(c).
Include site plans showing what specific quantitative standards are sought to be varied (setbacks, lot coverage, FAR, parking layout, etc.). Cross‑check with San Francisco County Development Standards.
If proposing less usable open space in certain eastern or C‑3‑O(SD) areas, prepare budget/plan for in‑lieu fee payment per § 427.
Check whether a public hearing is required (Zoning Administrator may waive a hearing for deviations under 10% at their option; exceptions exist). § 305(c) and interpretations.
Include any required environmental review materials and statements about General Plan consistency. § 305(c).
Verify appeal path and timeline (Board of Appeals, § 308.2). § 305(c) references appeals.

Risks & Ambiguities

Issue	Why it matters	What to verify
Variance vs. exception/conditional use	Applying for a variance when an exception or conditional‑use is the proper Code path may lead to denial or a required resubmittal.	Check whether the district/special‑use provision offers an exception or conditional‑use path (see § 305(a) and local SUD language).
Which findings apply for a rear‑yard waiver	Some waivers use variance procedures but require different findings than the five standard variance findings. Misreading this can cause an appealable denial.	Confirm whether the authorization cites § 134 waiver language (e.g., § 134(i–k)) and whether those subsections set distinct findings.
“Under 10%” administrative handling	The ZA may refuse to waive a hearing even for <10% deviations, and some standards (per‑unit parking) cannot be reduced with an “under 10%” approach.	Verify via the Zoning Administrator or the related interpretations whether your exact numeric deviation is eligible for summary processing. § 305(c).
Fees for reduced open space	In‑lieu fees can be substantial and differ by subdistrict; missing this will impact project economics.	If seeking reduced usable open space, calculate fees under § 427 for the applicable subdistrict (Eastern Neighborhoods, Central SoMa, C‑3‑O(SD)).
Interaction with noncomplying structures	Expanding a legal nonconforming structure may require only the specific variance from the underlying standard, not a variance under the noncomplying‑structure article; handling it wrong may add procedural steps.	Confirm whether the proposal requires a variance to the underlying quantitative standard or separate nonconforming approvals (see § 188 and § 305 interaction).
ADU waivers tied to rent‑stability covenants	An ADU waiver may require recording a regulatory agreement subjecting units to rent‑stability rules; applicants may not expect this obligation.	If seeking ADU-related waivers, check § 207.1(g) and § 307(l) and be prepared to execute and record a regulatory agreement.

Plain‑English summary

If a property in the unincorporated areas needs relief from a numeric zoning rule (setback, lot coverage, FAR, etc.), you generally apply for a variance to the Zoning Administrator and must prove five specific findings — hardship, uniqueness, necessity, no public harm, and consistency with the Code and General Plan (§ 305). If the district or an affordable‑housing program offers an exception or conditional‑use process, you usually must use that route instead; exceptions often have their own findings and sometimes require in‑lieu fees for lost open space (§ 328, § 427). Verify procedures and fee obligations for your parcel.

Information Gaps

Full, parcel‑specific permitted‑use tables for each zoning district (comprehensive district use lists were not included in the retrieved excerpts). Not found in retrieved materials. Verify with the jurisdiction.
Exact procedural fee amounts and current Planning Department application forms and submittal checklists (beyond the open‑space in‑lieu fees in § 427). Not found in retrieved materials — verify current fee schedule with the Planning Department.
The complete text of §§ 306–306.5 (procedures) and § 308.2 (appeal mechanics) were referenced but full procedure text was not included in the excerpts provided here; consult the Planning Code for procedural steps, noticing distances, and timelines. Not found in retrieved materials.

Source References

Planning Code — § 305 (Variances; limits on what may be varied; procedures referenced) and associated interpretations.
Planning Code — § 305(c) (required variance findings and hearing/appeal timing).
Planning Code — interpretations and guidance on § 305 and related issues (variance scope, <10% rule, substitution with exceptions).
Planning Code — § 328 (HOME‑SF review process exceptions; exceptions list and required findings § 328(e)).
Planning Code — § 427 (payment required where a variance/exception reduces required residential usable open space in certain subdistricts).
Planning Code — Special use district examples and special height/bulk exception rules (Scott Street, Haight Street, Fourth & Freelon SUDs) and SUD‑specific findings.
Planning Code — § 241 (Dolores Heights Special Use District; rear yard and height limits and variance authority).
Planning Code — interpretations on rear yard waivers and substitutions (Section 134 interpretations).
Planning Code — ADU waiver and regulatory agreement rules (§ 207.1(g) and cross reference to § 307(l)).
Planning Code — interactions between variances and noncomplying structures (Section 188 and interpretations).

Sources

Retrieved passages

San Francisco County Zoning Code (Section 328) High relevance
San Francisco County Zoning Code (Section header) High relevance
San Francisco County Zoning Code (Section 308.2) High relevance
San Francisco County Zoning Code (Section Map) High relevance
San Francisco County Zoning Code (Section 135) High relevance
San Francisco County Zoning Code (Section 305) High relevance
San Francisco County Zoning Code (Section 303) High relevance
San Francisco County Zoning Code (Section 188) High relevance

Cited sections

Official San Francisco County code library

Frequently asked questions

What is the primary test for getting a variance in San Francisco County's unincorporated areas?

A variance requires the Zoning Administrator to make five written findings: (1) exceptional or extraordinary circumstances unique to the property or intended use; (2) literal enforcement would cause practical difficulty or unnecessary hardship; (3) the variance is necessary to preserve a substantial property right of the subject property; (4) granting it will not be materially detrimental to public welfare or adjacent properties; and (5) it will be in harmony with the Planning Code and not adversely affect the General Plan — see § 305(c).

Can I use a variance to change the allowed use on my lot?

No. The Code prohibits variances that would amount to a reclassification or that would permit any use, height, bulk, or sign not expressly allowed in the applicable district. Where the Code provides a conditional‑use or exception route, you must typically use that route rather than a variance (§ 305(a)).

When is a Planning Commission exception used instead of a variance?

Planning Commission exceptions are used where the district or program text specifically grants the Commission authority to modify Code provisions (for example, HOME‑SF exceptions listed in § 328(d)). Exceptions often have their own findings (for HOME‑SF, see § 328(e)) and may require different analysis than the five variance findings.

Will a variance automatically reduce requirements like open space or parking?

Possibly, but there are limits. Certain mandatory requirements (inclusionary housing, some open‑space rules in specified districts, and some bicycle‑parking or TDM requirements where auto parking exists) may not be waived by variance (§ 305(a)). Where an exception or variance reduces required usable open space in certain districts, in‑lieu fees under § 427 may apply.

Can the Zoning Administrator grant a variance without a public hearing?

The Zoning Administrator may at their option hold or not hold a hearing when the variance involves a deviation of less than 10% from the Code requirement, but the ZA can still require a hearing; and certain standards (such as per‑unit parking requirements) are not eligible for “under 10%” administrative variances. See § 305(c) and the printed interpretations.

If my building is a legal noncomplying structure, do I need a variance to expand it?

You generally seek the variance only for the specific quantitative standard being violated (for example, a rear‑yard encroachment), not for the noncomplying structure article itself. The Code treats the variance as relief from the underlying quantitative standard; see the interaction between § 188 and § 305 in the interpretations.

Are there district examples where special height/bulk exceptions are standard?

Yes. Several Special Use Districts (Scott Street Senior Housing SUD, Haight Street Senior Affordable Housing SUD, Fourth & Freelon) create express exception paths to increase height/bulk for qualifying affordable or senior housing, and those exceptions are approved under conditional‑use or SUD procedures (see the SUD provisions and § 303/SUD cross‑references).

If I seek to reduce open space under HOME‑SF, will I owe money?

Yes — in many Eastern Neighborhoods subdistricts and in C‑3‑O(SD), a project that obtains a variance or Planning Commission exception to provide less usable open space than required must pay an in‑lieu fee; the amounts and fund destinations vary by subdistrict and are listed in § 427.

Does variance relief affect California building code (Title 24) requirements?

No — variances under the Planning Code adjust planning/zoning quantitative standards, not the California Building Standards Code. Any construction still must comply with the California Building Standards Code. Verify separate building‑permit requirements with DBI. Not found in retrieved materials for Title 24 interactions; verify with the jurisdiction.

Where do I look for appeal rules or timelines if the ZA denies my variance?

Appeals and timelines are handled per the Code’s appeal provisions; § 305(c) notes that a ZA decision becomes effective 10 days after the written decision unless a valid appeal is filed under the appeal rules (see § 308.2 for Board of Appeals procedures).

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