Santa Barbara — Overlay Districts

Last reviewed: July 2, 2026

Overview

This page explains the overlay (special) zoning districts in the City of Santa Barbara Zoning Code and how they modify the base zone rules a property already carries. Overlays discussed here include the S‑D Special District family (including the S‑D‑3 Coastal Overlay), the S‑H Senior Housing overlay, and the HWMF Hazardous Waste Management Facility Overlay. Overlays change or add standards for uses, setbacks, parking and review processes — they work on top of the base zone in the official zoning map and must be read together with the underlying zone and the City's zoning & planning overview and Santa Barbara Zoning rules.

(Links in the body: the page also points to the City's pages for development standards, parking, design review, historic preservation, ADUs and the California Building Standards Code where those topics are relevant.)

How Santa Barbara’s overlays work (core rules)

• Overlays in Santa Barbara are applied in combination with a base zone; land remains in its base zone plus an overlay symbol (for example S‑H, S‑D‑3, HWMF) on the Official Zoning Map. § 28.45.001 (S‑D general) and the zoning table in § 28.10.001 show these combinations.
• An overlay’s standards cannot be less restrictive than the comparable standard in the base zone; if the Planning Commission creates a special-district standard where the base zone has no comparable standard, the Commission must find the overlay does not permit more intense development than the base zone. § 28.45.006.
• Overlays may (and often do) add special procedures (rezoning, development plan, conditional use permit), special noticing, and additional findings for approval. See the specific overlay chapters below for those procedural rules (e.g., HWMF requires Notice of Intent and Local Assessment Committee steps). § 28.75.010, § 28.75.025.

District-by-district breakdown

S‑D Special District (general)

• Purpose: Provide a mechanism to require more restrictive standards in a limited area where base-zone standards are insufficient to protect the neighborhood or achieve the City's objectives. See § 28.45.005 (legislative intent).
• Typical permitted uses: Uses allowed in the underlying (base) zone unless the S‑D text for that numbered overlay specifically restricts them; the S‑D overlay supplements or tightens, it does not generally add unrelated uses. See § 28.45.001 and § 28.45.006.
• Key dimensional standard rule: An S‑D standard must be at least as restrictive as the comparable base-zone standard (cannot broaden entitlement). § 28.45.006.
• Where it applies: S‑D overlays are used citywide in targeted neighborhoods; individual S‑D overlay rules are codified in sections titled S‑D‑1, S‑D‑2, S‑D‑3, etc. See § 28.10.001 for how the Official Zoning Map labels overlays.

S‑D‑1 (example: San Roque Park Subdivision)

• Purpose / Where applied: The S‑D‑1 designation is applied to the San Roque Park Subdivision (north of State Street between San Roque Road and Ontare Road). § 28.45.007.A.
• Typical permitted uses & standards: The S‑D‑1 chapter tailors standards for that subdivision (see the precise S‑D‑1 text for permitted uses or development plan requirements). For the S‑D series the base zone restrictions remain unless the S‑D text modifies them. § 28.45.001 and § 28.45.007.

S‑D‑2

• What the code shows: The S‑D‑2 overlay is referenced in program rules (for example the Average Unit‑Size Density Incentive Program references lots subject to S‑D‑2). § 28.20.030 references S‑D‑2 as an overlay that does not automatically preclude certain programs.
• Important gap: A discrete S‑D‑2 chapter with the full S‑D‑2 standards was Not found in retrieved materials. Verify with the City’s Official Zoning Map and the Department of Community Development for the precise S‑D‑2 standards and map area. Not found in retrieved materials; Verify with the jurisdiction.

S‑D‑3 — Coastal Overlay Zone (Coastal Overlay, labeled S‑D‑3)

• Purpose: Implement the California Coastal Act and the City's certified Local Coastal Program (LCP). § 28.44.010 (legislative intent).
• Where it applies: The S‑D‑3 zone is applied to the City's Coastal Zone boundary (generally up to about 1,000 yards inland from mean high tide in the City, as adopted and as amended). § 28.44.020.
• Permits & procedures: Development in the S‑D‑3 overlay is subject to the Coastal Overlay chapter requirements and in many cases requires a Coastal Development Permit; if there is a conflict between the Local Coastal Program provisions and other city plans, the Local Coastal Program controls. § 28.44.030 and § 28.44.040 (definitions of appealable development). Also see the Coastal Review pointer § 28.37.090.
• Typical implications: additional noticing, potential appeals to the California Coastal Commission for certain categories (appealable development), and LCP consistency findings required at approval. § 28.44.030, § 28.44.040.

S‑H — Senior Housing Zone (S‑H)

• Purpose: Facilitate development of housing for elderly persons while ensuring compatibility and safeguards; S‑H is combined with base zones (A, E, R‑1 or R‑2). § 28.42.001 and § 28.42.005.
• Typical permitted uses: Uses are generally those of the underlying base zone but applied to senior housing development and subject to the S‑H specific development plan and time-limited precise-plan procedures; approval typically requires a development plan and may include conditions. § 28.42.010, § 28.42.130.
• Dimensional standards: Setback requirements default to the base zone unless the S‑H chapter specifies otherwise — see § 28.42.060 (Setbacks same as base zone). § 28.42.060.

HWMF — Hazardous Waste Management Facility Overlay Zone

• Purpose: Provide a mechanism to site off‑site hazardous waste management facilities while protecting public health and compatibility with surrounding uses. § 28.75.005.
• Typical permitted uses: Generally the underlying zone uses except residential; plus specifically allowed offsite hazardous waste uses (transfer, storage, treatment, recycling). Hazardous waste residual repositories are specifically prohibited within city limits. § 28.75.030.
• Key procedural and notice features: Applications require a Notice of Intent at least 90 days before filing, public information meetings, a City-appointed Local Assessment Committee, risk assessments, and CEQA compliance. § 28.75.025, § 28.75.010.
• Dimensional & operational controls: Building height and setbacks generally follow the underlying zone but special project development standards and detailed information (risk assessment, maps within quarter‑ and half‑mile radii) are required. § 28.75.050, § 28.75.045.

Most decision‑relevant standards (quick table)

Practical guidance and comparisons (plain‑English synthesis)

• Read the overlay chapter and the underlying base‑zone chapter together — the overlay rarely replaces everything in the base zone; it usually tightens or adds requirements. See § 28.45.001 and § 28.45.006.
• If your property lies inside S‑D‑3 (Coastal), expect extra public notice, consistency findings with the Local Coastal Program, and in some cases appeals to the California Coastal Commission. The LCP controls where it conflicts with other city plans. § 28.44.030.
• For specialized overlays (like HWMF) the application package is unusually large (technical risk assessment, maps showing sensitive uses, public meetings and a Local Assessment Committee) — plan months of lead time. § 28.75.025 and § 28.75.010.
• Overlays can impose special design or historic‑compatibility review requirements; for projects in landmark districts or with historic resources expect coordination with the City's historic preservation bodies and design review.

Checklist

• Check the Official Zoning Map to confirm base zone + overlay symbol for the parcel (S‑D, S‑D‑3, S‑H, HWMF, etc.) and record the exact overlay number. § 28.10.001.
• Read the overlay chapter text that corresponds to the overlay number (e.g., § 28.44.010–040 for S‑D‑3; § 28.75.001–130 for HWMF).
• Confirm whether the overlay adds permit requirements (development plan, conditional use, coastal permit) and build that sequence into schedule and budget. (See overlay chapter procedure subsections; e.g., § 28.75.010).
• Prepare any specialized studies required by the overlay (e.g., risk assessment, site maps for HWMF) and plan public outreach/noticing. § 28.75.010–025.
• Review relevant development standards, parking, and design review requirements that will still apply.
• If in the Coastal Overlay (S‑D‑3) verify appealable development boundaries on the City Post‑LCP Certification Map and confirm whether the Coastal Commission retains jurisdiction. § 28.44.040.
• Where overlays or projects involve historic resources, consult the City's historic preservation rules early.

Risks & Ambiguities

Plain‑English summary

In Santa Barbara an overlay is a second label on a parcel's zoning that adds neighborhood‑specific rules on top of the regular zone: some overlays (like S‑D‑3 / Coastal) add coastal permit and appeal rules, others (like HWMF) require large technical packages and community review, and S‑D overlays generally make base‑zone rules stricter — always read the overlay chapter together with the underlying zone before designing a project. § 28.45.006, § 28.44.030, § 28.75.025.

Source References

• Santa Barbara Zoning – zoning table and overlay list: § 28.10.001.
• S‑D Special District general rules and S‑D‑1: § 28.45.001, § 28.45.005, § 28.45.006, § 28.45.007.
• Coastal Overlay (S‑D‑3): § 28.44.010, § 28.44.020, § 28.44.030, § 28.44.040; Coastal review pointer § 28.37.090.
• Senior Housing (S‑H): § 28.42.001, § 28.42.005, § 28.42.010, § 28.42.060, § 28.42.130.
• Hazardous Waste Management Facility Overlay (HWMF): Chapter 28.75 — § 28.75.001, § 28.75.005, § 28.75.010, § 28.75.025, § 28.75.030, and related project standards.
• Average Unit‑Size Density Incentive Program reference to overlays and S‑D‑2: § 28.20.030.

Retrieved passages

• Santa Barbara Zoning Code (§ 28.20.030.) Medium relevance show source text
• Santa Barbara Zoning Code (Chapter 28.44.) Medium relevance show source text
• Santa Barbara Zoning Code (chapter nor) Medium relevance show source text
• Santa Barbara Zoning Code (Section 28.21.060.B.3) Medium relevance show source text
• Santa Barbara Zoning Code (Chapter 28.45.) Medium relevance show source text
• Santa Barbara Zoning Code (section and) Medium relevance show source text
• Santa Barbara Zoning Code (§ 28.20.030.) Medium relevance show source text
• Santa Barbara Zoning Code (chapter and) Medium relevance show source text
• Santa Barbara Zoning Code (§ 28.73.080.) High relevance show source text
• Santa Barbara Zoning Code (§ 28.75.010.) High relevance show source text
• Santa Barbara Zoning Code (§ 28.75.025.) Medium relevance show source text
• Santa Barbara Zoning Code (§ 28.75.025.) Medium relevance show source text
• Santa Barbara Zoning Code (§ 28.75.050.) Medium relevance show source text
• Santa Barbara Zoning Code (§ 28.75.030.) Medium relevance show source text
• Santa Barbara Zoning Code (§ 28.08.020.) Medium relevance show source text

Cited sections

• Santa Barbara Zoning – zoning table and overlay list: **§ 28.10.001**. (§ 28.10.001)
• S‑D Special District general rules and S‑D‑1: **§ 28.45.001**, **§ 28.45.005**, **§ 28.45.006**, **§ 28.45.007**. (§ 28.45.001)
• Coastal Overlay (S‑D‑3): **§ 28.44.010**, **§ 28.44.020**, **§ 28.44.030**, **§ 28.44.040**; Coastal review pointer **§ 28.37.090**. (§ 28.44.010)
• Senior Housing (S‑H): **§ 28.42.001**, **§ 28.42.005**, **§ 28.42.010**, **§ 28.42.060**, **§ 28.42.130**. (§ 28.42.001)
• Hazardous Waste Management Facility Overlay (HWMF): Chapter **28.75** — **§ 28.75.001**, **§ 28.75.005**, **§ 28.75.010**, **§ 28.75.025**, **§ 28.75.030**, and related project standards. (§ 28.75.001)
• Average Unit‑Size Density Incentive Program reference to overlays and S‑D‑2: **§ 28.20.030**. (§ 28.20.030)
• SantaBarbara_ZoningCode.md

• Official Santa Barbara code library