Redwood City — Overlay Districts

Last reviewed: July 2, 2026

Overview

Redwood City's combining (overlay) districts are established in Article 25 of the Zoning Ordinance; they modify, add to, or limit the rules of the underlying base district to address special situations (for example allowing vehicular sales in an industrial area or permitting emergency shelters). The combining districts are applied as suffixes (for example CP-V) and do not normally reduce underlying district requirements unless the ordinance explicitly says so. See the city's zoning material for map and district context; development proposals must also remain consistent with the city's published development standards. The combining-district rules and individual district text below are drawn directly from the Redwood City Zoning Ordinance; see the cited code sections for the authoritative language. § 25.1–25.8

NOTE: this page covers only the overlay/combining district rules in the Redwood City Zoning Ordinance (Article 25). For building-code requirements consult the California Building Standards Code. For site-level issues (setbacks, parking, design review, ADUs) consult the linked pages below.

• First natural mentions of related topics (linked): zoning, development standards, parking, design review, ADUs, California Building Standards Code.

What the code establishes (Article 25, Combining Districts)

• Purpose: Combining districts modify or supplement base districts to address special conditions (the ordinance expressly: "To provide modifications, additions, and limitations to other districts..." — § 25.1). The combining designation does not automatically reduce the underlying requirements unless specifically allowed elsewhere in the ordinance — § 25.2.

Below are the combining districts the City uses, with a district-by-district practical breakdown (purpose, typical permitted uses, the usual approval trigger, and where it applies). Each entry cites the controlling code section.

T (Transient Residential Units) Combining District

• Purpose: To allow transient residential-type uses as an add-on to an existing district where appropriate. § 25.3
• Typical permitted uses (when the "T" suffix is added): motels, mobile home parks, nursing homes and hospitals, and clubs/lodges/fraternities — these uses are allowed only after obtaining a Use Permit (i.e., conditional approval) per the combining district text. § 25.3
• Dimensional / development standards: The combining district itself does not list unique setbacks/height or lot-coverage numbers; projects remain subject to the base district's development standards unless the ordinance says otherwise (see § 25.2). Verify applicable development standards and parking rules for motel/hotel uses. § 25.2

Where it applies: Any district may receive the "T" suffix when the City determines transient residential uses are appropriate and a Use Permit is obtained. § 25.3

O (Office) Combining District

• Purpose: Permit office and related professional/medical uses where otherwise the base residential density would preclude them. § 25.4
• Typical permitted uses: Professional offices and medical/dental offices and laboratories (specifically excluding manufacture/sale/distribution of pharmaceuticals) — permitted only with a Use Permit when the "O" suffix is applied to R-4 or R-5 districts. § 25.4
• Dimensional / development standards: Projects retain the base district dimensional standards (setbacks, height, FAR) unless otherwise amended; confirm parking and site layout expectations early. See the base R-4/R-5 rules and the city's parking requirements. § 25.2

Where it applies: The O suffix is limited to R-4 and R-5 districts (multi-family zones) and only where the City has applied that suffix. § 25.4

V (Vehicular) Combining District

• Purpose: Allow automobile-related sales and service uses in appropriate commercial/industrial districts where these uses would otherwise be restricted. § 25.5
• Typical permitted uses (with a Use Permit): Franchised new-vehicle dealers (passenger vehicles); used-car sales; new/used truck sales with service/repair primarily within a permanent building; sales/installation of auto parts and accessories (mufflers, tires, brakes, etc.). § 25.5
• Approval trigger: All V-district automobile uses require a Use Permit; auto sales/repair are not by-right merely because the suffix exists. § 25.5
• Dimensional / development standards: The V designation does not replace base district dimensional rules; site layout, service bays, outdoor display, and stacking must meet base district standards and applicable articles (including parking and outdoor equipment sections). Verify against development standards and parking. § 25.2; § 25.5

Where it applies: The V suffix may be added to CG, CP, IR, or IP district designations only (General Commercial, Commercial Park, Industrial—Restricted, Industrial Park). § 25.5

W (Water) Combining District

• Purpose: To permit and regulate development in/on/over water bodies—essentially a tidal/plain/waterfront overlay. § 25.6
• Typical permitted approach: The W suffix is used with the TP (Tidal Plain) district; permitted and conditionally permitted uses within the TP-W district are generally those allowed on the adjacent landward property, but implementation is specifically through a Planned Development Permit. § 25.6
• Approval trigger: A Planned Development Permit is required for development in TP-W. § 25.6
• Dimensional / development standards: Uses allowed mirror the landward adjacent district's permitted and conditional uses; specific waterfront design, public access, and environmental constraints may apply (see TP district standards and the Planned Development permit rules). Confirm shoreline-specific standards and public-access requirements in the TP Article and the City's development standards. § 25.6

Where it applies: Only in combination with the TP (Tidal Plain) district — i.e., TP-W. § 25.6

R (Residential) Combining District

• Purpose: To add or recognize residential uses in districts where mixed residential/commercial use is appropriate; the R suffix authorizes residential uses where allowed by the General Plan and zoning. § 25.7
• Typical effect: The R combining district permits residential uses consistent with the R-5 district standards (the code explicitly references R-5 as the template for residential use rules). That means development under an "R" combining district is subject to the R-5 density and dimensional framework unless the ordinance provides otherwise. § 25.7
• Approval trigger and standards: Use-specific approvals (Use Permits, Planned Development, design review) depend on the base district and the proposed change; verify density, parking, setbacks and open-space requirements under the R-5 provisions and related articles. See the R-5 Article and development standards. § 25.7

Where it applies: The R suffix can be applied to any district that either allows residential uses or is designated for mixed-use in the General Plan. § 25.7

S (Emergency Shelter) Combining District

• Purpose: To comply with California housing law requirements by permitting emergency shelters as-of-right where the S suffix applies. § 25.8
• Permitted uses: Emergency shelters are expressly permitted in the S combining district in addition to the underlying district's permitted uses — emergency shelters are therefore allowed where the "S" suffix has been applied without requiring a conditional-use finding that would otherwise be needed. § 25.8.B
• Use standards (high-level items from the code): The shelter operator must have a written management plan covering staff training, neighborhood outreach, transportation, security, resident screening/compatibility, and resident services (training/counseling/treatment) as applicable. Additional operational conditions may be applied by the City. § 25.8.C.1
• Approval trigger: Because the City applies the S suffix to comply with state law, emergency shelters are permitted within S-districts; however, projects still must comply with development, health & safety, and zoning standards and any applicable site‑plan or permit review. Confirm whether design review or a ministerial site approval is required for the particular facility. § 25.8

Where it applies: The S suffix may be added to any zoning district; the ordinance explicitly allows that practice to implement state-mandated emergency shelter siting. § 25.8.A

Quick reference table — Combining districts (decision-relevant)

Practical guidance and synthesis

• Combining districts are shorthand modifiers: an "R" or "V" suffix tells you immediately what additional uses or regulatory layer applies on top of the base district, but the underlying district's numeric standards (setbacks, height, FAR, lot coverage) remain controlling unless the combining-district text explicitly changes them. See § 25.2.

• Many combining-district uses (notably T, O, and V) are allowed only with a Use Permit. Applicants should budget time for discretionary review and public noticing per the City's permit procedures (Article 41 and the Planning Division process). Confirm whether your project also requires design review or a Planned Development permit (especially for TP-W). § 25.3–25.6; Article 41.

• For auto-related proposals in a V combining district, expect the City to require that sales, display, and repair activities be enclosed or arranged such that outside storage/stacking and public interface meet circulation and screening rules; coordinate early with the Planning Division and study parking and site-circulation standards. § 25.5

• For S (Emergency Shelter), the operator's written management plan is a core submittal item; the code explicitly lists topics the plan must address (staff training, outreach, transportation, security, screening/compatibility of residents, and resident services). Expect conditions of approval tied to the management plan and to local health/safety/fire requirements. § 25.8.C

• Where the combining district references another permit route (for example TP-W requiring a Planned Development permit), that higher-level permit's standards control procedural timing and submittal content. Verify the applicable precise plan or TP article for shoreline-specific standards. § 25.6

Checklist

• Confirm the exact zoning on the parcel (base district and any existing combining suffixes) via the City zoning map and Planning Division. Verify with the City's zoning resources. § 3.1
• Identify which combining district(s) (if any) apply or must be requested; cite the specific combining-district section (§ 25.3–25.8) used.
• Determine whether the proposed use is permitted by-right, requires a Use Permit, or requires a Planned Development Permit (TP-W). § 25.3–25.6
• Prepare submittals to show compliance with base-district dimensional standards (setbacks, height, lot coverage, open space) — consult the City's development standards. § 25.2
• Prepare parking calculations and circulation plan per parking rules and any special V-district needs. § 25.5
• If in an S district, prepare the required management plan and operational details per § 25.8.C.
• Confirm whether design review or historic‑resource review is required and coordinate with design review and historic preservation processes as applicable. Article 40 / Article 45 (see ordinance index).

Risks & Ambiguities

Plain-English Summary

Redwood City's overlay rules (called combining districts) are suffixes like -V, -S, -R that add specific allowed uses or procedural rules on top of the base zone; they usually do not change yard, height, or lot coverage rules unless the code explicitly states otherwise. Before you design a project, confirm the exact zoning suffixes on your parcel, determine whether the overlay makes your intended use permitted or only allowed with a Use Permit/Planned Development Permit, and prepare the submittals the code requires (for example the management plan for an S shelter). § 25.1–25.8

Source References

• Redwood City Zoning Ordinance, Article 25, “Combining Districts” — § 25.1 (Purpose), § 25.2 (Minimum Requirements), § 25.3–25.8 (T, O, V, W, R, S).
• Specific combining-district texts cited: § 25.3 (T) and § 25.4 (O) — see code excerpts.
• § 25.5 (V) and § 25.6 (W); § 25.7 (R); § 25.8 (S) — combining district details and use standards.
• Zoning map/district list and combining-district table: Article 3 (District designations) and cross references in Article 3. § 3.1.
• For procedure, public notice, and permit types see Article 41 (Common Procedures) and Article 40 (Administration).

Retrieved passages

• Redwood City Zoning Code (Article 49) High relevance show source text
• Redwood City Zoning Code (Section 39.3.) High relevance show source text
• Redwood City Zoning Code (Article 42) High relevance show source text
• CBC § 3 (§ 3) High relevance show source text
• Redwood City Zoning Code (§ 3) High relevance show source text
• Redwood City Zoning Code (Section apply) Medium relevance show source text
• Redwood City Zoning Code (§ 5) Medium relevance show source text
• Redwood City Zoning Code (§ 5.1) Medium relevance show source text
• Redwood City Zoning Code (§ 19) High relevance show source text
• Redwood City Zoning Code (Article 25) High relevance show source text
• Redwood City Zoning Code (Article 36) Medium relevance show source text

Cited sections

• Redwood City Zoning Ordinance, Article 25, “Combining Districts” — **§ 25.1** (Purpose), **§ 25.2** (Minimum Requirements), **§ 25.3–25.8** (T, O, V, W, R, S). (Article 25)
• Specific combining-district texts cited: **§ 25.3** (T) and **§ 25.4** (O) — see code excerpts. (§ 25.3)
• **§ 25.5** (V) and **§ 25.6** (W); **§ 25.7** (R); **§ 25.8** (S) — combining district details and use standards. (§ 25.5)
• Zoning map/district list and combining-district table: Article 3 (District designations) and cross references in Article 3. **§ 3.1**. (Article 3)
• For procedure, public notice, and permit types see Article 41 (Common Procedures) and Article 40 (Administration). (Article 41)
• RedwoodCity_ZoningCode.md

• Official Redwood City code library