Tiburon — Historic Preservation

Last reviewed: July 2, 2026

Overview

This page summarizes how the Town of Tiburon’s Zoning Ordinance handles historic preservation in downtown Tiburon, focusing on the Historic Protection Overlay (HPO), how it interacts with the underlying Neighborhood Commercial (NC) and Village Commercial (VC) zones, and the local review steps that apply. For the ordinance context and map references see the town’s general planning summary on the Tiburon zoning & planning overview. (§ 16-10.010)

How Tiburon’s code structures historic protection

• The Town implements local historic preservation primarily through a dedicated overlay, the HPO (Historic Protection Overlay), which protects properties listed in the Town’s Local Historic Inventory and imposes special review principles for exterior work (§ 16-23.020; § 16-23.060).
• Properties in the HPO remain in their underlying zone (most commonly NC or VC downtown) and must also meet the underlying commercial standards (Table 2‑3) and the general development standards in Article III (§ 16-23.060; § 16-22.040).
• Local design guidance—the Downtown Tiburon Design Handbook and the Town’s design guidelines—must be considered when reviewing HPO properties (§ 16-23.060).
• The HPO explicitly anticipates application of the California Historical Building Code to inventory buildings where appropriate (§ 16-23.020) ; see California Building Standards Code for the state-level code context.

(Links: the ordinance refers to the adopted zoning map; find overlay mapping in the Town zoning map section.) (§ 16-14.020)

First time keywords linked: zoning & planning overview, overlay districts, development standards, design review, parking, ADUs, California Building Standards Code

HPO (Historic Protection Overlay) — purpose & controlling rules

• Purpose: Protect, maintain and enhance historic structures in downtown that are included in the Town’s Local Historic Inventory; promote public appreciation and resolve conflicts between preservation and other uses (§ 16-23.020) .
• Where applied: As an overlay (HPO) on parcels identified on the Zoning Map / Planned Development Map; the overlay is an additional regulatory layer, not a standalone zone (§ 16-14.020; § 16-23.010) .
• Permitted uses: Uses in the HPO are the same as those permitted in the underlying NC and VC zones (i.e., the overlay does not change permitted use categories) (§ 16-23.060) .
• Key review and treatment rules:
  • Any exterior alteration/modification to a building in the HPO requires approval by the Director through a Site Plan and Architectural Review application for Minor Alterations (i.e., Director-level review for minor work) (§ 16-23.060) .
  • The Director must try to maximize retention of original materials and design features listed in the Local Historic Inventory (Inventory adopted by Town Council resolution; see § 16-22.020[D]) (§ 16-23.060) .
  • Repairs are preferred over replacement; replacement features must match historic ones in design, color, texture and visual qualities; replacements must be substantiated with evidence of prior existence when required (§ 16-23.060) .
  • Repainting generally does not require a permit if the Director determines the color conforms to the Benjamin Moore Historical Colors palette (§ 16-23.060) .
  • The Downtown Tiburon Design Handbook’s goals/principles must be considered in HPO reviews (§ 16-23.060) .
  • Listing in the Inventory makes a resource eligible for treatment under the California Historical Building Code where applicable (§ 16-23.020) .

Practical guidance: If your building is in HPO, expect the reviewer (usually the Director for minor exterior work) to require documentation that shows historic features, their condition, and how new work is compatible with the Inventory and the Downtown Design Handbook (§ 16-23.060) .

NC (Neighborhood Commercial) — why it matters for HPO properties

• Purpose: Provide neighborhood‑serving commercial uses and allow mixed-use in specified areas (§ 16-22.020; see Table 1-1 for zone list) .
• Typical permitted uses: Retail, restaurants, professional services, and dwelling units consistent with the NC use table (see Article II Commercial Zones) (§ 16-22.030 / Table 2‑3) .
• Key dimensional standards (from Table 2‑3 / Commercial Zone Development Standards):
  • Minimum lot area: 10,000 s.f. (NC) — Height Limit: 30 ft. — Maximum FAR: 0.371 (§ 16-22.040 Table 2-3) .
• Where it applies: Downtown parcels identified as NC on the Zoning Map; HPO properties overlay NC parcels retain these numeric standards unless otherwise modified by an approved transfer of intensity or specific plan (§ 16-14.020; § 16-22.040) .

Link: the Town’s numeric and dimensional guidance is summarized under development standards.

VC (Village Commercial) — what’s different for HPO parcels on Main Street

• Purpose: Like the NC zone but intended for the small‑scale village retail core; allows some tourist‑oriented uses (souvenir shops) and includes street‑front controls on Main Street (§ 16-22.040) .
• Typical permitted uses: Similar to NC but with specific allowances/exceptions (souvenir shops; restrictions on ground-floor office uses along some Main Street addresses) (§ 16-22.040) .
• Key dimensional standards (Table 2‑3):
  • Maximum FAR: 0.281 (VC) — for Downtown properties with frontage on Tiburon Boulevard a higher height (up to 38 ft and no more than three stories) may apply (§ 16-22.040, Table 2‑3 notes) .
• Where it applies: Village commercial blocks of downtown (see zoning map) and therefore any HPO overlay parcels mapped within the VC zone (§ 16-14.020) .

Quick decision‑relevant standards (table)

Checklist — what an applicant must satisfy for exterior work on an HPO property

• Confirm property is listed in the Town’s Local Historic Inventory (verify with Department and the Zoning Map). (§ 16-23.020)
• Prepare a Site Plan & Architectural Review application (Minor Alteration if eligible) and submit materials documenting historic features and proposed work. (§ 16-23.060; § 16-52.020)
• Show how the project maximizes retention of original materials and matches historic details where replacement is necessary; include photographic or archival evidence if replacing missing features. (§ 16-23.060)
• Demonstrate compliance with Table 2‑3 commercial development standards and Article III general standards (setbacks, lot coverage, parking). (§ 16-23.060; § 16-22.040; § 16-30 series)
• If relying on the California Historical Building Code for alternatives to the regular building code, document that the building qualifies as a historic resource in the Inventory. (§ 16-23.020)
• If painting only, check with the Director about the Benjamin Moore Historical Colors palette to confirm permit exemption. (§ 16-23.060)

Note: Other permits (building permits, utility approvals) may still be required by the Town; see the general applicability rules. (§ 16-10.050) Link: you may also need to coordinate on specific parking requirements under the Town’s parking rules. (/us/california/tiburon/parking)

Risks & Ambiguities

Plain‑English summary

If your downtown Tiburon building is on the Town’s Local Historic Inventory and covered by the HPO overlay, exterior changes are reviewed to protect historic materials and appearance: uses stay the same as the underlying NC or VC zone, numeric development standards (FAR, height, setbacks) still apply, and most exterior work requires Site Plan & Architectural Review (Director-level for minor alterations) with the Downtown Tiburon Design Handbook and the Inventory guiding decisions (§ 16-23.020; § 16-23.060; § 16-22.040).

Information Gaps

• Complete parcel-by-parcel list of Inventory entries (the Inventory is referenced but the full inventory list and maps were not included). Not found in retrieved materials. (§ 16-23.020 cited)
• Precise local definition or thresholds that distinguish “Minor Alteration” from work requiring higher‑level review. Not found in retrieved materials. (§ 16-23.060 references Director review but does not define 'minor')
• Current application forms, fees, and exact processing timelines for HPO Site Plan & Architectural Review. Not found in retrieved materials. (§ 16-50 series referenced generally, but fees/times are administrative)

Source References

• Tiburon Zoning Ordinance, Title IV, Chapter 16 — § 16-23.060 (Historic Protection Overlay Zone: permitted uses, standards, Director review)
• Tiburon Zoning Ordinance — § 16-23.020 (Purposes of the Overlay Zones; HPO purpose; California Historical Building Code application)
• Tiburon Zoning Ordinance — § 16-22.040 (Commercial Zones general development standards; Table 2‑3 with NC/VC FAR and height)
• Tiburon Zoning Ordinance — § 16-14.020 (Zoning Map and Zones; overlays identified on the Zoning Map)
• Tiburon Zoning Ordinance — § 16-60.020 (Design Review Board duties and authority)
• Tiburon Zoning Ordinance — § 16-52.020 (Site Plan and Architectural Review reference in review rules)
• Tiburon Zoning Ordinance — § 16-12.020 (Director interpretation authority)
• Tiburon Zoning Ordinance Table of Contents and related indexes (Title IV, Chapter 16) for cross-references and chapter headings.
• 2025 California Historical Building Code (background on qualified historical buildings and definitions)

Internal reference pages used in prose (first occurrence links):

• Tiburon zoning & planning overview
• Tiburon Overlay Districts
• Tiburon Development Standards
• Tiburon Design Review
• Tiburon Parking
• Tiburon ADUs
• California Building Standards Code

Retrieved passages

• Tiburon Zoning Code (Article II) High relevance show source text
• CBC § 020 (Chapter 13D) High relevance show source text
• Tiburon Zoning Code (Article V) High relevance show source text
• CBC § 16 (Article II) Medium relevance show source text
• Tiburon Zoning Code (Article III) Medium relevance show source text
• Tiburon Zoning Code (Section 16-23.040) Medium relevance show source text
• Tiburon Zoning Code (Article II) Medium relevance show source text
• Tiburon Zoning Code (Section 16-60) Medium relevance show source text
• Tiburon Zoning Code (Chapter 14) Medium relevance show source text
• Tiburon Zoning Code (Article I) Medium relevance show source text

Cited sections

• Tiburon Zoning Ordinance, Title IV, Chapter 16 — § 16-23.060 (Historic Protection Overlay Zone: permitted uses, standards, Director review) (Title IV)
• Tiburon Zoning Ordinance — § 16-23.020 (Purposes of the Overlay Zones; HPO purpose; California Historical Building Code application) (§ 16-23.020)
• Tiburon Zoning Ordinance — § 16-22.040 (Commercial Zones general development standards; Table 2‑3 with NC/VC FAR and height) (§ 16-22.040)
• Tiburon Zoning Ordinance — § 16-14.020 (Zoning Map and Zones; overlays identified on the Zoning Map) (§ 16-14.020)
• Tiburon Zoning Ordinance — § 16-60.020 (Design Review Board duties and authority) (§ 16-60.020)
• Tiburon Zoning Ordinance — § 16-52.020 (Site Plan and Architectural Review reference in review rules) (§ 16-52.020)
• Tiburon Zoning Ordinance — § 16-12.020 (Director interpretation authority) (§ 16-12.020)
• Tiburon Zoning Ordinance Table of Contents and related indexes (Title IV, Chapter 16) for cross-references and chapter headings. (Title IV)
• 2025 California Historical Building Code (background on qualified historical buildings and definitions)
• Tiburon zoning & planning overview
• Tiburon Overlay Districts
• Tiburon Development Standards
• Tiburon Design Review
• Tiburon Parking
• Tiburon ADUs
• California Building Standards Code
• Tiburon_ZoningCode.md
• 2025 California Historical Building Code.md

• Official Tiburon code library