Tiburon — Signage

Last reviewed: July 2, 2026

Overview

Sign regulation in the Town of Tiburon’s land-use law is implemented by reference: the Town of Tiburon Zoning Ordinance (Title IV, Chapter 16) repeatedly defers to the Town’s separate Municipal Code Chapter 16A (Signs) for the substantive sign rules. The Zoning Ordinance establishes where sign rules apply, which permits interact with signage, and which land‑use standards require signs to comply with Chapter 16A (Signs) — e.g., for bed & breakfasts, seasonal rental units, and child day‑care facilities. See the Zoning Ordinance title and relevant cross‑references in § 16-10.010, § 16-52.020, § 16-40.030, § 16-40.040, and § 16-40.050.

Important high‑level points you must know up front

• Applicants seeking to install, modify, or replace signs must follow the Town’s separate sign regulations in Municipal Code Chapter 16A (Signs); the Zoning Ordinance itself points applicants to Chapter 16A rather than repeating size/height/illumination limits. § 16-40.030, § 16-40.040, § 16-40.050, § 16-40.060 (land‑use standards) and § 16-62 (nonconforming signs) all refer to Chapter 16A for sign specifics.
• The placement of signs does not require Site Plan and Architectural Review, but it does require a Sign Permit and compliance with Chapter 16A (Signs). See § 16-52.020.
• For structural/electrical design and safety obligations, the Building Code / Title 24 (Appendix H on signs) will apply in combination with the Town’s sign regulations; verify with the Building Department. Not part of the Zoning Ordinance text except by cross‑reference to state codes.

Note: this page only interprets what the Zoning Ordinance says about signs (where it references signage rules). The detailed technical and dimensional sign standards themselves live in Municipal Code Chapter 16A (Signs) which was not included among the retrieved materials. For any numeric sign limits (area, height, illumination) or the Sign Permit application form/fee schedule, see Chapter 16A (not found in retrieved materials).

How Tiburon’s Zoning Ordinance treats signs (district context + where to look)

The Zoning Ordinance organizes land use into zones and overlays and repeatedly points sign questions to the separate sign chapter. Below I give a district‑by‑district orientation that tells you where sign rules will matter and where to find the controlling provisions in the Zoning Ordinance. For full numeric sign standards (e.g., square footage, pole height, internals) use Chapter 16A (Signs) — Not found in retrieved materials.

• The Zoning Ordinance’s Article II lists zone chapters and maps (residential, commercial, overlay zones): see § 16-21 (Residential Zones), § 16-22 (Commercial Zones), and § 16-23 (Overlay Zones) for the definitions and where uses are allowed.

R-1 (and general residential zones)

• Purpose: § 16-21.010 sets out the purpose of Residential Zones (to preserve residential character and limit incompatible intrusions). Signs for residential uses are regulated by Chapter 16A.
• Typical allowed uses: single‑family dwellings and other residential uses listed in § 16-21.030. Signs associated with home‑based businesses or seasonal rentals must comply with Chapter 16A and any Home Occupation or seasonal rental rules in § 16-52.110 / § 16-40.040.
• Key development standards location: residential dimensional rules (setbacks, height, lot coverage) are in § 16-21.040 and the general development standards in Article III; sign specifics remain in Chapter 16A. Verify residential sign allowances for small plaque signs, temporary signs, and home‑occupation signs in Chapter 16A. Not found in retrieved materials.

R-2 / R-3 / RMP (multi‑family and planned districts)

• Purpose & typical uses: Multi‑family, duplex, and planned‑development uses appear under § 16-21 variants (see table of contents for § 16-21.030 and the zoning map). Signage for non‑residential aspects (e.g., multi‑unit project identification) is governed by Chapter 16A; the Zoning Ordinance references that nonconforming signs are handled under Chapter 16A.
• Where it applies: the zoning map shows R-2, R-3, and RMP areas across Old Tiburon and portions of town — check § 16-14.020 for map and parcel specifics.

RO-1 / RO-2 (residential‑office or mixed residential‑office)

• Purpose: Organized under Article II (see § 16-22 for commercial zone purposes and § 16-21 for residential zone purpose cross‑references). Signs for offices/mixed uses are controlled by Chapter 16A.
• Typical sign situations: building identification, tenant panels, directional signage — all require a Sign Permit per the Zoning Ordinance cross‑references.

Commercial zones (see C‑ categories in Article II)

• Purpose: § 16-22.010 states commercial zone purposes (provide locations for retail, services). Sign rules affecting business identity and wayfinding are delegated to Chapter 16A; sign permit process and any exemptions are administered per Town sign chapter.
• Design/ Review: Signs do not trigger Site Plan & Architectural Review but do require a Sign Permit; however signs in historic or special overlay areas may receive additional review through the Design Review Board. Where the Zoning Ordinance requires design review for buildings, signs are explicitly carved out of that trigger but are still subject to Chapter 16A and any applicable overlay standards. See § 16-52.020 and the Zoning Ordinance’s treatment of overlay zones in § 16-23.010.

Overlay Districts (historic, affordable housing, RPD, etc.)

• Overlay rules can modify allowed uses and development standards; the Zoning Ordinance instructs that overlay zone requirements interact with specific use standards — and signage in overlay areas remains governed by Chapter 16A, but remember an overlay may impose aesthetic requirements that affect permitted sign types or placement. See § 16-23.010 for overlay purposes and the Design Review Board authority in § 16-60.020.

Most decision‑relevant statements and where the code points you

Plain‑English guidance / practical steps (what to do)

1. Treat any proposal to install/alter a sign as a Chapter 16A project: obtain the Town Sign Permit and follow the detailed standards in Chapter 16A (Signs) (the Zoning Ordinance routes you there). § 16-52.020, § 16-40.030.
2. Confirm whether your property is in an overlay (historic, RPD, etc.) on the Town zoning map (see § 16-14.020) because overlays can affect appearance standards; also verify whether the Design Review Board has any say for your site. Link: see the Tiburon overlay districts and design review pages.
3. Signs never trigger Site Plan & Architectural Review by themselves (they require a Sign Permit), but other work (new façades, structural anchors) may trigger building permits under the California Building Standards Code — verify with Building & Planning. § 16-52.020.

Additional internal resources you should check early: the Town’s zoning & planning overview, development standards, parking, nonconforming uses, and variances and exceptions pages.

Checklist

• Determine your zone and overlay(s) on the Town zoning map (see § 16-14.020).
• Confirm whether the sign work is accessory to a use that itself has special sign mentions (B&B, seasonal rental, child‑care) and follow the referenced use standard requiring Chapter 16A compliance. § 16-40.030, § 16-40.040, § 16-40.050.
• Prepare and file a Sign Permit application (signs are carved out of Site Plan & Architectural Review but still require the Sign Permit per the Zoning Ordinance). § 16-52.020.
• Confirm whether any sign is nonconforming and if so follow the rules in Chapter 16A for nonconforming signs. § 16-62.030.
• For electrical, structural anchoring, or wind/seismic design of the sign, consult the Building Division and the California Building Standards Code. Not governed by Chapter 16 except by reference.
• If your property is in a historic overlay or otherwise subject to the Design Review Board, check Tiburon Historic Preservation and design review rules — overlay rules may affect allowable sign styles.

Risks & Ambiguities

Plain‑English Summary

Tiburon’s Zoning Ordinance (Title IV, Chapter 16) does not itself contain the numeric sign rules — it consistently tells you to follow Municipal Code Chapter 16A (Signs) and requires a Sign Permit for installation or modification of signs; signs do not trigger Site Plan & Architectural Review but still must meet the Town’s sign chapter, overlay, and building/safety requirements. § 16-52.020, § 16-40.030, § 16-62.030.

Source References

• Town of Tiburon Zoning Ordinance (Title IV, Chapter 16) — Table of Contents and Title information: § 16-10.010, § 16-10.020.
• Signs referenced in specific‑use standards (Bed & Breakfast, Seasonal Rentals, Child Day‑Care): § 16-40.030, § 16-40.040, § 16-40.050, § 16-40.060 (each states “Signs shall be installed/maintained in compliance with Municipal Code Chapter 16A (Signs)”).
• Site Plan & Architectural Review carve‑out for signs; Sign Permit requirement reference: § 16-52.020.
• Nonconforming signs are governed by the separate sign chapter: § 16-62.030 (nonconforming structures/uses note).
• Zoning map and zone labels (RO‑1, RO‑2, R‑1, R‑2, R‑3, RPD, RMP appear on the Town map): § 16-14.020 (Zoning Map).
• California Building Standards Code — Appendix H (signs) and general building/electrical guidance (structural/electrical requirements for signs): Not enacted by the Zoning Ordinance but relevant to safety/permit work; see building code Appendix H in the Building Code materials.

Retrieved passages

• Tiburon Zoning Code (Article IV) Medium relevance show source text
• Tiburon Zoning Code (TITLE IV) Medium relevance show source text
• CBC § 16 (Chapter 16A) Medium relevance show source text
• Tiburon Zoning Code (Article I) Medium relevance show source text
• Tiburon Zoning Code (Article III) Medium relevance show source text
• Tiburon Zoning Code (ARTICLE II) Medium relevance show source text
• Tiburon Zoning Code (Chapter 14) Medium relevance show source text
• CEC § H101 (chapter as) Medium relevance show source text
• Tiburon Zoning Code (Title IV) Medium relevance show source text
• Tiburon Zoning Code (Article I) Medium relevance show source text
• CEC § H103 (SECTION H103) Medium relevance show source text
• Tiburon Zoning Code (Article VII) Medium relevance show source text

Cited sections

• Town of Tiburon Zoning Ordinance (Title IV, Chapter 16) — Table of Contents and Title information: **§ 16-10.010**, **§ 16-10.020**. (Title IV)
• Signs referenced in specific‑use standards (Bed & Breakfast, Seasonal Rentals, Child Day‑Care): **§ 16-40.030**, **§ 16-40.040**, **§ 16-40.050**, **§ 16-40.060** (each states “Signs shall be installed/maintained in compliance with Municipal Code Chapter 16A (Signs)”). (§ 16-40.030)
• Site Plan & Architectural Review carve‑out for signs; Sign Permit requirement reference: **§ 16-52.020**. (§ 16-52.020)
• Nonconforming signs are governed by the separate sign chapter: **§ 16-62.030** (nonconforming structures/uses note). (§ 16-62.030)
• Zoning map and zone labels (RO‑1, RO‑2, R‑1, R‑2, R‑3, RPD, RMP appear on the Town map): **§ 16-14.020** (Zoning Map). (§ 16-14.020)
• California Building Standards Code — Appendix H (signs) and general building/electrical guidance (structural/electrical requirements for signs): Not enacted by the Zoning Ordinance but relevant to safety/permit work; see building code Appendix H in the Building Code materials.
• Tiburon_ZoningCode.md
• 2025 California Building Code.md

• Official Tiburon code library