Local zoning · San Rafael

San Rafael — Overlay Districts

Q: What are the overlay districts in San Rafael and where are they listed?

San Rafael’s overlay districts are the Hillside Development Overlay (-H) , Wetland Overlay (-WO) , Eichler and Alliance Homes Overlay (-E/A) , and Canalfront Review Overlay (-C) ; they are established in Title 14 and listed in the overlay table (see § 14.02.030 and the individual chapters § 14.12–§ 14.15).

Q: How do I know if the Hillside overlay applies to my lot?

The -H applies to lots with an average slope of 25% or greater and to lots in hillside General Plan designations; even unmapped steep lots are presumed to be covered — confirm with a slope calculation and the Community Development Department (see § 14.12.020).

Q: What limits does the Eichler/Alliance overlay place on home additions?

In an -E/A area additions must respect the overlay’s design intent: maximum height is 17 ft and there is a limit of one habitable floor ; roof changes that increase height by more than 6 inches or alter pitch are subject to design review (see §§ 14.14.020–030).

Q: Can I fill or build over wetlands in San Rafael?

Filling open water or wetlands is tightly controlled: the -WO requires delineation/confirmation (USACE mapping), and fill in open waters requires a use permit and may trigger other permits (see § 14.13.020 and § 14.13.030). The code also authorizes restoration orders and cost recovery for illegal fill.

Q: When does a hillside lot need a geotechnical report?

The code requires hillside standards for lots with average slope >25% ; while the text references geotechnical/slope considerations in Chapter 14.12 and related design review criteria, project‑level geotechnical reports are commonly required where grading, foundations, or stability are implicated. Confirm specific submittal requirements with staff (see § 14.12.010–020 and § 14.25.050 design criteria).

Q: Who confirms whether my lot contains mapped wetlands?

The Wetland Overlay references wetlands identified and confirmed by the U.S. Army Corps of Engineers and notes the city maintains an inventory in the Community Development Department; a professional wetland delineation and USACE determination may be required (see § 14.13.020).

Overlay Districts under the San Rafael local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

San Rafael’s overlay districts are special zoning layers that sit on top of base zones and modify uses, siting, and development rules to protect sensitive areas and preserve local character. The overlay districts in Title 14 are the Hillside Development Overlay (-H), Wetland Overlay (-WO), Eichler and Alliance Homes Overlay (-E/A), and Canalfront Review Overlay (-C); each has specific purposes, triggers for application, and standards that supplement the base district rules. These overlays are adopted as chapters within Title 14 of the San Rafael Municipal Code and must be read together with the base zoning standards and the city’s development rules; see the city’s primary zoning summary for context via the San Rafael Zoning page. (§ 14.01.010, § 14.02.030)

Hillside Development Overlay — -H

Purpose: The Hillside Development Overlay (-H) is intended to reduce hazards (landslide, erosion, fire), preserve natural hillside features, and ensure safe emergency access and compatible site design for steep lots. § 14.12.010.
Where it applies: Applied to lots with an average slope of 25% or greater and to lots designated Hillside Resource Residential or Hillside Residential in the General Plan; lots with slope >25% that aren’t mapped are still governed by the chapter. § 14.12.020.
Typical permit / review triggers: Projects on qualifying hillside lots must comply with the -H rules and may require environmental and design review per the city’s design review processes; see the San Rafael Design Review page for procedure context. § 14.12.010; § 14.16.200 .
Key dimensional/technical standards (summary): The chapter’s standards are applied in lieu of or in addition to base-zone site development rules; specifics (grading limits, slope mitigation, required findings) are in Chapter 14.12 and cross-referenced by Chapter 14.16 development rules. Verify applicable yard/height adjustments and design criteria at the project stage. § 14.12.010–020; § 14.16.200 .

Wetland Overlay — -WO

Purpose: The Wetland Overlay (-WO) protects identified and potential wetlands and controls filling, dredging, and vegetation removal to preserve habitat and avoid loss of open waters. § 14.13.020.
Where it applies: Applied on the zoning map to properties containing wetlands confirmed by the U.S. Army Corps of Engineers; wetlands not yet mapped are still protected and a site-specific assessment may trigger -WO requirements. An inventory is maintained by the Community Development Department. § 14.13.020.
Typical permitted uses: The overlay sets a separate land-use table that uses symbols P (permitted), C (conditional) and blanks for prohibited activities; allowed uses often align with open-space, limited agriculture (excluding cannabis), certain public uses, and tightly regulated recreation and restoration activities. Consult the land-use matrix in the code for the exact permission for a given underlying zone. § 14.13.030.
Key procedural controls: Filling open water requires a use permit and is also subject to tidelands/development permits from public works; the code authorizes restoration orders and cost recovery for illegal fill. § 14.13.030; § 14.13.100 .

Eichler and Alliance Homes Overlay — -E/A

Purpose: The Eichler/Alliance Homes Overlay (-E/A) modifies R-residential site development rules to preserve the predominantly single‑story and distinctive architectural character of Eichler and Alliance neighborhoods. § 14.14.010.
Where it applies: Mapped onto residential lots composed predominantly of Eichler and Alliance homes (specific map adopted with the ordinance). Confirm applicability with the Community Development Department. § 14.14.010.
Key dimensional standards and limits:
- Maximum height: 17 feet (grade to peak). § 14.14.020(a).
- Limit of one habitable floor (lofts/mezzanines count as habitable). § 14.14.020(b).
Design-review triggers: Roof changes that raise height more than 6 inches or change pitch (except solar collectors) are subject to design review per the code’s design review rules; see San Rafael Design Review for process and thresholds. § 14.14.030; § 14.25.040(C) .

Canalfront Review Overlay — -C

Purpose: The Canalfront Review Overlay (-C) protects the canalfront’s physical and social characteristics, encourages water-oriented design, preserves access/view corridors, and discourages filling of open waters. § 14.15.010.
Where it applies: Applied to the canalfront area (mapped in Title 14); the overlay adds canal-specific orientation, access, and view protections and references specific setbacks. § 14.15.010.
Key standards and cross-references:
- Fill in canal/open waters is strongly disfavored and requires a use permit plus any required tidelands permits. § 14.15.010(A); § 14.13.040(G) .
- Canal setback guidance points to the creek/canal setback rules in § 14.16.080 (e.g., 25 ft recommended from canal/banks in many cases). See Chapter 14.16 (site and use regulations) for quantitative setback guidance. § 14.15.010(F); § 14.16.080 .

Quick-reference table: Decision‑relevant overlay standards and typical permitted uses

Overlay (designator)	Main purpose / effect	Key numeric limits or triggers	Where to confirm in code (primary §)
Hillside (-H)	Reduce hillside hazards; preserve natural features; influence design/review	Applies where average slope ≥ 25%; hillside design standards apply to new structures/additions in hillside areas	§ 14.12.010–020; see § 14.16.200
Wetland (-WO)	Protect mapped and unmapped wetlands; regulate fill and habitat impacts	Wetlands mapped by USACE; use permits required for fill/dredge; specific permitted uses listed in a WO land-use table	§ 14.13.020; § 14.13.030
Eichler/Alliance (-E/A)	Preserve single-story Eichler/Alliance neighborhood character	Max height 17 ft; one habitable floor only; roof changes > 6 in. trigger review	§ 14.14.010–030
Canalfront (-C)	Protect canal orientation, views, access; limit filling	Discourages/limits fill in open waters; references 25 ft canal setbacks and other site design standards	§ 14.15.010; see § 14.13.040(B) and § 14.16.080

Notes: The overlays modify or add to base-zone rules in Division II; always read the overlay chapter together with the base district standards in Division II and with cross-referenced chapters (e.g., site and use regulations in Chapter 14.16, and design review rules in Chapter 14.25). See the San Rafael Development Standards page for how base standards interact with overlays.

Checklist — what an applicant must satisfy for an overlay‑area project

Confirm whether the parcel is mapped within an overlay district (check zoning map / Community Development Department) — mapping rules and recordkeeping are in Title 14. § 14.01.020; § 14.02.020 .
Determine which overlay(s) apply (-H, -WO, -E/A, -C) and which provisions are mandatory. § 14.02.030 lists overlay designators. .
Run the proposed use against the overlay land‑use table (for -WO, use Table 14.13.030) or apply the overlay’s development limits (for -E/A: height and single-floor limit). § 14.13.030; § 14.14.020.
Prepare required technical studies when triggered (e.g., wetland delineation / USACE confirmation, geotechnical for hillside, canal fill/shoreline reports). Wetland mapping is confirmed by USACE per the code. § 14.13.020; § 14.12.020.
Verify whether the project requires a use permit, design review, or other discretionary approvals (e.g., fill in wetlands requires a use permit; certain roof changes in -E/A require design review). Consult Chapter 14.22 (Use Permits) and Chapter 14.25 (Design Review). § 14.13.050–070; § 14.14.030; § 14.25.040.
Check cross-cutting rules that still apply: setbacks and site standards in Chapter 14.16 (e.g., creek/canal setbacks), parking requirements in Chapter 14.18 (see San Rafael Parking) and sign/landscaping rules where relevant. § 14.16.080; § 14.18.x.
Confirm any historic-preservation or other overlay overlays that may interact with your parcel (see San Rafael Historic Preservation). Not all overlays are mutually exclusive — verify with staff. Not found in retrieved materials: a consolidated parcel-level crosswalk; verify with the jurisdiction. .

Risks & Ambiguities

Issue	Why it matters	What to verify
Overlay mapping vs. on‑site conditions	Some overlays (hillside, wetlands) protect resources not fully mapped; a parcel may be subject to overlay rules even if not shown on the map	Confirm with Community Development whether the parcel is mapped and whether site-specific surveys (wetland delineation, slope calc) trigger overlay rules (§ 14.12.020; § 14.13.020).
Wetland delineation authority	The WO relies on USACE confirmation; city inventory may lag actual site conditions	Obtain an up-to-date wetland delineation and ask staff whether USACE confirmation or city inventory listing is required (§ 14.13.020).
Interplay with base‑zone standards	Overlays replace or modify base standards in different ways; failure to read both can miss a critical limit (e.g., FAR, setbacks)	Read the overlay chapter together with the applicable base district rules in Division II and cross-referenced chapters (14.16, 14.18, 14.25). Verify conflicting provisions with the planning department (§ 14.02.030; § 14.16.x).
Design review triggers not intuitive	Small dimensional changes (e.g., 6 in. of roof height in -E/A) can trigger discretionary review	Review the specific review triggers in the overlay (14.14.030) and design review rules (14.25.040(C)) early; ask staff if a proposed work is exempt or minor.
Canal and creek setbacks depend on multiple sections	The -C chapter points to other chapters for setback specifics	Confirm applicable setback distance for your parcel (e.g., 25 ft guidance is in § 14.16.080 but may be modified by canal design plans) and whether an adopted canal design plan controls.

Plain‑English Summary

If your lot touches a hill, wetland, Eichler neighborhood, or the San Rafael Canal, an overlay zone likely adds special rules — think lower heights in Eichler areas, extra paperwork and no‑fill rules near wetlands and the canal, and slope-focused standards in hillsides — and those overlay chapters are written into Title 14 of the Municipal Code (look up § 14.12, § 14.13, § 14.14, § 14.15).

Source References

Title 14 — Zoning (San Rafael Municipal Code), organization and mapping of overlays: § 14.01.010; § 14.02.030.
Hillside Development Overlay: Chapter 14.12 — §§ 14.12.010–020.
Wetland Overlay: Chapter 14.13 — §§ 14.13.020, 14.13.030, 14.13.040, 14.13.100.
Eichler and Alliance Homes Overlay: Chapter 14.14 — §§ 14.14.010–030.
Canalfront Review Overlay: Chapter 14.15 — § 14.15.010; cross‑references to § 14.13.040(B) and § 14.16.080 for setbacks and fill rules.
Overlay applicability and coordination with development and design review: § 14.16.200 and Chapter 14.25 (Design Review).

If you need parcel‑specific confirmation (overlay mapping or how base district rules interact with an overlay), verify with the City of San Rafael Community Development Department. Not found in retrieved materials: a parcel-level interactive map URL or a consolidated table pairing every mapped parcel with its overlays; verify with the jurisdiction.

Sources

Retrieved passages

San Rafael Zoning Code (§ 1) High relevance
San Rafael Zoning Code (Section 14.13.040) High relevance
San Rafael Zoning Code (Section 14.13.040) High relevance
San Rafael Zoning Code (§ 1) Medium relevance
San Rafael Zoning Code (Chapter 14.17) Medium relevance
San Rafael Zoning Code (§ 1) Medium relevance
San Rafael Zoning Code (Title 14) Medium relevance
San Rafael Zoning Code (Section 14.16.030) Medium relevance

Cited sections

Official San Rafael code library

Frequently asked questions

What are the overlay districts in San Rafael and where are they listed?

San Rafael’s overlay districts are the Hillside Development Overlay (-H), Wetland Overlay (-WO), Eichler and Alliance Homes Overlay (-E/A), and Canalfront Review Overlay (-C); they are established in Title 14 and listed in the overlay table (see § 14.02.030 and the individual chapters § 14.12–§ 14.15).

How do I know if the Hillside overlay applies to my lot?

The -H applies to lots with an average slope of 25% or greater and to lots in hillside General Plan designations; even unmapped steep lots are presumed to be covered — confirm with a slope calculation and the Community Development Department (see § 14.12.020).

What limits does the Eichler/Alliance overlay place on home additions?

In an -E/A area additions must respect the overlay’s design intent: maximum height is 17 ft and there is a limit of one habitable floor; roof changes that increase height by more than 6 inches or alter pitch are subject to design review (see §§ 14.14.020–030).

Can I fill or build over wetlands in San Rafael?

Filling open water or wetlands is tightly controlled: the -WO requires delineation/confirmation (USACE mapping), and fill in open waters requires a use permit and may trigger other permits (see § 14.13.020 and § 14.13.030). The code also authorizes restoration orders and cost recovery for illegal fill.

Are canalfront projects treated differently for setbacks and access?

Yes. The -C overlay emphasizes canal orientation, public access, and views and points to setback rules in § 14.16.080 (for example, a 25 ft recommendation from canal banks is stated there). Fill and dredging in canal waters also require special permits and review. Verify whether a canal design plan supersedes baseline setbacks.

Do overlays replace the base zoning rules?

Overlays modify or add to base district rules — they can replace specific site development standards or add new requirements. Always read the overlay chapter together with the base district rules in Division II and the site/use chapters (e.g., Chapter 14.16); consult staff if there’s conflict. § 14.02.030 and related cross-references explain the interaction.

Will adding an ADU in an overlay area change the overlay requirements?

The Retrieved materials do not provide an overlay‑specific ADU exemption. ADUs remain subject to overlay rules where they affect the same siting/height/setback triggers (verify with the planning department); consult the local ADU rules and state ADU law for specific ADU standards. Not found in retrieved materials: overlay‑specific ADU exceptions. Verify with the jurisdiction.

When does a hillside lot need a geotechnical report?

The code requires hillside standards for lots with average slope >25%; while the text references geotechnical/slope considerations in Chapter 14.12 and related design review criteria, project‑level geotechnical reports are commonly required where grading, foundations, or stability are implicated. Confirm specific submittal requirements with staff (see § 14.12.010–020 and § 14.25.050 design criteria).

Who confirms whether my lot contains mapped wetlands?

The Wetland Overlay references wetlands identified and confirmed by the U.S. Army Corps of Engineers and notes the city maintains an inventory in the Community Development Department; a professional wetland delineation and USACE determination may be required (see § 14.13.020).

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