Tiburon — Variances and Exceptions

Last reviewed: July 2, 2026

Overview

This page explains how the Town of Tiburon’s Zoning Ordinance handles variances and the several types of exceptions (including use/development exceptions, detached two‑family dwelling exceptions, overlay exceptions, wireless communications exceptions, and economic exceptions). The primary variance rules are found in § 16-52.030; special exceptions are distributed through Article II, Article IV, Article V and Article VIII of the Zoning Ordinance. All citations below point to the local ordinance text and the specific controlling § where the rule appears.

Note: for the Town’s zone rules and development tables referenced below see the Town’s zoning overview and development standards pages (linked inline where first mentioned). Tiburon zoning & planning overview

How Variances work in Tiburon (quick legal anchors)

• The variance procedure, scope, and required findings are set out in § 16-52.030 of the Zoning Ordinance. The Review Authority (Design Review Board or Planning Commission, depending on the permit) may grant a Variance where literal enforcement would cause practical difficulties or unnecessary physical hardships. Self‑created hardships cannot be relied on.
• Variances may address development standards such as fences/walls/screening, site area/width, setbacks, lot coverage, height, distances between structures, usable open space, and off‑street parking/loading—but use variances are expressly prohibited.
• Parking variances (including locating spaces off‑site or paying in‑lieu fees) are allowed only where they incentivize nonresidential development and facilitate transit access, consistent with Government Code §65006.5; the code adds specific findings for parking/loading variances.

Who decides and what the Review Authority must find

• The Review Authority for a variance is the body with jurisdiction over the associated permit: either the Design Review Board or the Planning Commission as described in § 16-60.020 and § 16-60.030. Variances tied to other entitlements are reviewed together and staff should try to eliminate the need for a variance by reasonable project changes.
• To approve a Variance the Review Authority must make all findings listed in § 16-52.030.E: (1) special circumstances (size, shape, topography, location, surroundings) cause deprivation of privileges enjoyed by similar properties; (2) the variance will not be a grant of special privileges; (3) strict application would cause practical difficulty or unnecessary physical hardship (not self‑created); and (4) the variance will not be detrimental to public welfare or injurious to nearby property.
• Additional findings apply for parking/loading variances (see § 16-52.030.F): no present/anticipated traffic volumes require strict enforcement; no parking on public streets that interferes with traffic or creates safety hazards; no other condition inconsistent with ordinance objectives.

Time limits, revocation, appeals, and record effects

• Variances expire with an associated Zoning Permit; otherwise a variance expires three years after effective date unless exercised. Once exercised a variance runs with the land unless revoked. A variance can be revoked after notice and a public hearing for fraud, non‑compliance with conditions, or changed circumstances. Appeals follow § 16-66.

Exceptions (types, where they live in the code, and special rules)

• Detached two‑family dwelling exceptions (special kind of exception) exist for lots in the R‑2 zone and are governed by § 16-40.020. The intent is tightly limited approval of detached two‑family structures in Old Tiburon/Lyford’s Cove; findings and recommended conditions (e.g., parking, unit size split, no height/coverage variances allowed for the project) are required.
• Commercial‑zone exceptions (for example, allowing street‑fronting ground‑floor office uses in the NC or VC zones) are described in § 16-22.040.B and require findings such as demonstration that retail/personal services are not economically viable at that location.
• Overlay exceptions: overlay zones (Historic Protection Overlay HPO, Affordable Housing Overlay AHO/RMP) carry their own exception and incentive rules; see § 16-23 and the HPO standards at § 16-23.060. Tiburon Overlay Districts
• Wireless Communications Facilities: the code allows exceptions to mandatory WCF standards upon specific findings (e.g., no feasible alternatives; state/federal law requires accommodation or public interest is served) and permits the Director to waive CUP requirements for qualifying co‑location/stealth designs—see § 16-42.050.
• Economic exceptions (a formal, Council‑level process) are in Article VIII. The Council may grant an economic exception if strict application precludes an economically viable use or would be an unconstitutional taking; detailed financial and title information is required and the Council’s findings must identify supporting evidence (§ 16-80.050).

District‑by‑district breakdown (where variances/exceptions typically matter)

Below are the Tiburon zones that most frequently interact with variance/exception requests. Each subsection summarizes purpose, typical permitted uses, key dimensional standards, and where the zone commonly applies. Bold the zone names and key numeric standards.

Note: for full lists of allowed uses and permit requirements see Article II. For numerical development standards see the residential and commercial tables in Article II and the Town’s Tiburon Development Standards.

R-1 (Single‑Family Residential)

• Purpose: promote single‑family residential character; baseline single‑family development standards are applied.
• Typical permitted uses: single‑family dwellings, accessory structures; some accessory uses per Article II.
• Key dimensional standards (see § 16-21.040 Table): minimum lot area 10,000 s.f., maximum lot coverage 30%, front setback 15 ft, side setbacks 8 ft, height limit 30 ft (primary), and FAR guidance referenced in § 16-52.020.I. Variances for setbacks, coverage and height fall within the variance scope but must meet the findings in § 16-52.030.

R-1‑B‑A and R-1‑B‑2 (Neighborhood variants)

• Purpose: same as R‑1 but with neighborhood‑specific front/side yard setbacks (Bel Aire/other pockets). Development standards match R‑1 except for the modified setbacks in § 16-21.040. Variances are commonly requested where historical setbacks create physical constraints.

RO‑1 and RO‑2 (Residential Open)

• Purpose: encourage low‑density single‑family development on larger lots.
• Key standards: RO‑1 minimum lot area 40,000 s.f., maximum lot coverage 15%, front setback 30 ft, RO‑2 minimum lot area 20,000 s.f., coverage 15%—see Table in § 16-21.040. Variances in RO zones are evaluated under the same variance findings but the threshold for “practical difficulty” often reflects lot size/steep topography.

R‑2 (Two‑Family) and R‑3 (Multi‑family)

• Purpose: R‑2 for two‑family development (Old Tiburon/Lyford’s Cove), R‑3 for higher density multifamily. Detached two‑family exceptions are a special allowance in R‑2 via § 16-40.020 and carry strict conditions (parking, no allowed height or setback variances for the detached two‑family exception).

RPD / RMP (Planned Residential and Multiple Planned)

• Purpose: planned developments with standards set by master/precise plans; specific standards are established by the controlling precise plan/PD permit. Variance requests may be constrained by the precise plan language; consult the specific plan.

NC (Neighborhood Commercial) and VC (Village Commercial)

• Purpose: commercial activity at neighborhood/downtown scale. NC has explicit allowed uses and conditional uses in § 16-22.030, VC largely shares NC rules but allows souvenir shops and has special downtown restrictions (e.g., no street‑fronting office on Main Street unless exception granted). Key numeric standards in Table 2‑3: NC minimum lot area 10,000 s.f., height limit 30 ft, maximum FAR 0.371; VC maximum FAR 0.281. Exceptions for street‑front office use are in § 16-22.040.B.

HPO (Historic Protection Overlay)

• Purpose: protect downtown historic character. Uses follow underlying NC/VC allowances; exterior changes trigger design‑review‑tailored procedures, and the Director is given special review authority for minor alterations. Exceptions and design flexibility are in § 16-23.060. Tiburon Historic Preservation

RMP/AHO and NC/AHO (Affordable Housing Overlay Zones)

• Purpose: provide incentives and exceptions for affordable housing (uses and incentives set out in § 16-23.030 through § 16-23.050). Qualification, deed restriction, and density provisions are detailed there.

Decision‑relevant quick reference table

Checklist (what an applicant must satisfy before a variance/exception will be considered)

• File a complete application through the Planning Division per § 16-50 with the required fee.
• Provide site plans, project plans, topography, and any evidence showing the “special circumstances” (size, shape, topography, location, or surroundings) that cause practical difficulty per § 16-52.030.E.1.
• Demonstrate the variance is not a grant of special privileges and is not based on self‑created hardship per § 16-52.030.E.2–3.
• For parking/loading variances: include traffic/parking studies and transit access justification to meet § 16-52.030.F findings. Tiburon Parking
• If requesting an exception (e.g., detached two‑family), submit the additional materials specified by the applicable exception section (e.g., § 16-40.020 for detached two‑family).
• Be prepared for public hearing notice and appeal timelines per § 16-64 and § 16-66.

Risks & Ambiguities

Plain‑English summary

If a strict reading of Tiburon’s zoning rules would cause a real physical hardship because of your lot’s shape, size, or topography, you can apply for a variance under § 16-52.030, but you must prove special circumstances, not a self‑created problem, and the variance cannot change the allowed use. Some limited exceptions exist (detached two‑family in R‑2, downtown commercial exceptions, overlay exceptions, wireless facility waivers, and Council‑level economic exceptions) — each has its own findings and documentation requirements, and some carve‑outs (for example, no height variances when using the detached two‑family exception).

Source References

• Town of Tiburon Municipal Code, Title IV, Chapter 16, Zoning Ordinance — Variance (Permit Review and Decisions): § 16‑52.030.
• Tiburon Zoning Ordinance — Variance findings and parking/loading variance rules: § 16‑52.030.E–F.
• Site Plan & Architectural Review and Review Authority context: § 16‑52.020 and § 16‑60.020 / § 16‑60.030.
• Residential Zones — development standards table (R‑1, R‑2, R‑3, RO‑1/2, RPD/RMP): § 16‑21.040 (Table) and supporting definitions.
• Commercial Zones — NC and VC standards and exceptions (Table 2‑3, street‑front office exception): § 16‑22.040.
• Detached two‑family dwelling exception: § 16‑40.020.
• Overlay zones and Historic Protection Overlay (HPO): § 16‑23.030 – § 16‑23.060.
• Wireless Communications Facilities exceptions & CUP waiver criteria: § 16‑42.050.
• Economic Exceptions (required information and Council findings): § 16‑80.040 / § 16‑80.050.
• For procedural items (public hearings, notice, appeals): § 16‑64 and § 16‑66.

Also see related Town pages:

• Tiburon Development Standards (setbacks, FAR, lot coverage references are applied in variance review)
• Tiburon Parking (parking variance special findings)
• Tiburon Design Review (Design Review Board jurisdiction)
• Tiburon Overlay Districts (HPO, AHO, etc.)
• Tiburon ADUs (not governed here; check ADU rules separately)
• California Building Standards Code (building permit interplay — verify building permit timing/expiration)

Retrieved passages

• Tiburon Zoning Code (Article V) High relevance show source text
• Tiburon Zoning Code (Section 65006.5) High relevance show source text
• Tiburon Zoning Code (Section 65006.5) High relevance show source text
• Tiburon Zoning Code (Section 16-50) High relevance show source text
• Tiburon Zoning Code (Article II) High relevance show source text
• Tiburon Zoning Code (Section 16-52.040) High relevance show source text
• CGBSC § 16 (Section 16-90) High relevance show source text
• Tiburon Zoning Code (Article VIII) High relevance show source text
• Tiburon Zoning Code (Article III) Medium relevance show source text
• Tiburon Zoning Code (Section 16-21.040) Medium relevance show source text
• Tiburon Zoning Code (Article IV) Medium relevance show source text
• Tiburon Zoning Code (TITLE IV) Medium relevance show source text
• Tiburon Zoning Code (TITLE IV) Medium relevance show source text
• Tiburon Zoning Code (Article II) Medium relevance show source text
• Tiburon Zoning Code (Title IV) Medium relevance show source text
• Tiburon Zoning Code (Section 16-52.040) Medium relevance show source text

Cited sections

• Town of Tiburon Municipal Code, Title IV, Chapter 16, Zoning Ordinance — Variance (Permit Review and Decisions): **§ 16‑52.030**. (Title IV)
• Tiburon Zoning Ordinance — Variance findings and parking/loading variance rules: **§ 16‑52.030.E–F**. (§ 16)
• Site Plan & Architectural Review and Review Authority context: **§ 16‑52.020** and **§ 16‑60.020 / § 16‑60.030**. (§ 16)
• Residential Zones — development standards table (R‑1, R‑2, R‑3, RO‑1/2, RPD/RMP): **§ 16‑21.040** (Table) and supporting definitions. (§ 16)
• Commercial Zones — NC and VC standards and exceptions (Table 2‑3, street‑front office exception): **§ 16‑22.040**. (§ 16)
• Detached two‑family dwelling exception: **§ 16‑40.020**. (§ 16)
• Overlay zones and Historic Protection Overlay (HPO): **§ 16‑23.030 – § 16‑23.060**. (§ 16)
• Wireless Communications Facilities exceptions & CUP waiver criteria: **§ 16‑42.050**. (§ 16)
• Economic Exceptions (required information and Council findings): **§ 16‑80.040 / § 16‑80.050**. (§ 16)
• For procedural items (public hearings, notice, appeals): **§ 16‑64** and **§ 16‑66**. (§ 16)
• Tiburon Development Standards (setbacks, FAR, lot coverage references are applied in variance review)
• Tiburon Parking (parking variance special findings)
• Tiburon Design Review (Design Review Board jurisdiction)
• Tiburon Overlay Districts (HPO, AHO, etc.)
• Tiburon ADUs (not governed here; check ADU rules separately)
• California Building Standards Code (building permit interplay — verify building permit timing/expiration)
• Tiburon_ZoningCode.md

• Official Tiburon code library