Sebastopol Zoning, Planning & Building Codes

Last reviewed: July 3, 2026

Overview

Sebastopol’s land-use rules are codified in the City’s adopted Zoning Code, titled Title 17, City of Sebastopol Zoning Code (the Zoning Code). The Zoning Code is a districting plan (map + text) that implements the General Plan and sets the city’s permitted uses, development standards, review rules and special overlay controls (§ 17.04.010). The Code is organized by district chapters (residential, commercial/industrial, community facilities, open space, planned community, wetlands/combining districts) with citywide rules in separate chapters for general standards, parking, and procedures.

This page orients you to where the important rules live in Sebastopol’s Title 17, summarizes the district families and the major citywide controls, flags the key discretionary/permit paths, and explains how state housing rules (ADU law, density/affordable-housing provisions) are reflected in the local code.

(First-time readers: the city’s land-use map and district boundaries are the Zoning Map incorporated into the Code; see § 17.04.040 for adoption and scope.)

How Sebastopol's code is organized

• The overall title is formally the “City of Sebastopol Zoning Code” — adopted as Title 17 — and the Code’s purpose and applicability are in § 17.04.010–17.04.080.
• The Zoning Map and district descriptions are handled in Chapter 17.10 (Zoning Map and interpretation) and by the chapter that defines each district family (e.g., Chapter 17.20 for Residential districts).
• Citywide development rules that apply across districts are collected in dedicated chapters: general height/setback/encroachment rules in Chapter 17.100, parking standards in Chapter 17.110, and special development programs (inclusionary housing, growth management, park dedication standards) in their own chapters (for example, Ch. 17.250 for inclusionary housing; Ch. 17.500 for the Growth Management Program).
• Procedural chapters for discretionary approvals, design review, conditional uses, variances, environmental review, and enforcement live in the procedural portion of Title 17 (permit and hearing chapters such as the Design Review/permit chapters and Public Hearing/Appeals chapters). For example, design and discretionary review procedures are in the Title 17 permit chapters (see the design-review and hearing chapters listed at the table of contents entries for 17.425 and related sections).

Useful internal links (first mention of each topic below links to the GoCodebook menu pages):

• The City’s zoning program: Sebastopol Zoning — Title 17 itself and the official Zoning Map are the primary controlling documents (§ 17.04.040).
• The General Plan / land-use categories and broad allowable uses: Sebastopol Land Use.
• Citywide standards: Sebastopol Development Standards — general height, yard and creek setbacks and other cross‑cutting standards are in Chapter 17.100 (see § 17.100.010–.020).
• Parking rules: Sebastopol Parking — off-street parking requirements are in Chapter 17.110 (see § 17.110.020).
• Design review and discretionary permits: Sebastopol Design Review — design review and permit procedures are found in the discretionary-permit chapters and design-review chapters (see the permit chapter listings around 17.425).
• Overlay/combining rules: Sebastopol Overlay Districts — wetlands and environmental combining districts appear in Chapter 17.44 and Chapter 17.46 (see § 17.44.010 and § 17.46.050).
• ADU rules and local implementation of state ADU law: Sebastopol ADUs — Chapter 17.220 contains the local accessory dwelling unit and junior ADU rules (see § 17.220.010–.030).
• The state codes that apply at building/permit stage: California Building Standards Code — Title 24/Building Code compliance is required alongside local zoning approvals (referenced in local ADU and building-permit provisions).

Zoning district families (what they are called and where to find them)

The Code groups districts into base district chapters. Below are the principal district families and where the rules for each live (chapter and representative section):

• Residential districts — R1, R2, R3, R4, R5, R6, R7, and RMH (Mobile Home Park) are defined at Chapter 17.20; see § 17.20.010 (purpose and individual district descriptions) and the development standards table in § 17.20.030.
  • Example programmatic controls in the residential chapter: the Code authorizes the Planning Commission to allow up to a 10% increase in lot coverage in some circumstances (see § 17.20.030).
• Commercial / Office / Industrial — districts including CO (Office), CG (General Commercial), CD (Downtown Commercial), M (Industrial), OLM (Office/Light Industrial), and CM (Commercial Industrial) are grouped under Chapter 17.25 (see § 17.25.010–.030). These chapters contain a matrix of permitted uses (Table 17.25‑1) and district development standards (Table 17.25‑2).
• Community Facilities (CF) — Chapter 17.30 lays out CF permitted uses and standards (Table 17.30‑2); representative development standards include a maximum building height of 32 ft and typical setbacks such as 15 ft front / 5 ft side / 15 ft rear shown in the CF table (Table 17.30‑2).
• Open Space (OS) — rules are in Chapter 17.32 with, for example, a maximum of one story / not to exceed 17 ft in some cases per the OS table (Table 17.32‑1).
• Planned Community (PC) — Chapter 17.40 establishes the PC district process and requires a policy statement and development plan for each PC rezoning; PC districts have individually‑set development standards via the approved plan (see § 17.40.060 and § 17.40.040).
• Wetlands / combining districts — W (Primary Wetland), WS (Secondary Wetlands), and WF (Wetlands Fringe) combining districts and the ESOS (Environmental and Scenic Open Space) combining district are in Chapter 17.44 and 17.46; these chapters carry special setback, survey and permit submittal requirements (e.g., resource analyses, vernal-pool/rare-plant surveys). See § 17.44.010–.050 and § 17.46.050 for the ESOS objectives and setback buffers.
• Other chapters: Community Facilities (Ch. 17.30), Small-lot subdivisions (Ch. 17.230), Condominium conversion (Ch. 17.240), Inclusionary housing (Ch. 17.250), and Growth Management (Ch. 17.500) contain program-specific rules. Examples: small-lot subdivisions have a maximum building height of 30 ft (§ 17.230.050) and maximum lot coverage 65% (§ 17.230.060).

Citywide development standards — where they live and representative rules

• Where to find them: the cross‑cutting or citywide standards are principally in Chapter 17.100 (general height, yard encroachments, creek setbacks and accessory rules) and in each district chapter’s development-standard tables (for example Tables 17.20‑2 for residential and Table 17.25‑2 for commercial/industrial). See § 17.100.010 and the district development-standard chapters.
• Heights and exceptions: Chapter 17.100 spells out elements that may exceed height limits (e.g., chimneys, solar equipment may extend up to 5 ft beyond limits) and other general height rules (see § 17.100.020).
• Setbacks/FAR/lot coverage: primary values are set in each district table — e.g., CF district setbacks referenced above (Table 17.30‑2), OS FAR limits and height caps (Table 17.32‑1), and small-lot subdivision rules front setback 15 ft / rear 10 ft / max lot coverage 65% / max height 30 ft in § 17.230.030–.060.
• Floor area ratio and density: commercial and industrial FAR maximums and residential density caps are in each district table (see Table 17.25‑2 and Table 17.20‑2 for the district‑by‑district numbers such as maximum FARs and maximum residential densities).
• Parking: citywide off‑street parking standards are in Chapter 17.110; the ordinance requires off-street parking per the schedules and design standards in § 17.110.020–.030, includes dimensional specs (Table 17.110‑1), and contains shared‑parking and reduction rules (see § 17.110.020 and § 17.110.030).

Link to city parking guidance: Sebastopol Parking (first mention).

Design review & discretionary approvals (the permit path)

• Design review and most discretionary land‑use permits are regulated under the Title 17 permit chapters; a design review requirement is applied across development proposals and is implemented under the design/permitting procedures listed in the Code (see the design‑review, hearing, conditional-use and variance chapters — see the listing for 17.425 et seq. for design review procedures and decision authorities).
• Typical permit path (high level): (1) pre‑application or completeness check; (2) application for the specific entitlement (e.g., design review, conditional use permit, variance), with required submittals; (3) staff review and environmental review (CEQA where required), public notice/public hearing if required; (4) decision by the Planning Director, Planning Commission or City Council depending on the entitlement; and (5) building permit issuance after entitlements and any dwelling‑allocation (if required) are in place. The Code structures appeals and hearings in its procedural chapters; see the hearing, appeals, and enforcement sections.
• Growth management (dwelling allocations): Sebastopol operates a Growth Management Program that limits the total dwelling allocations to 750 dwelling units through 2035, with annual allocations limited to 50 units, and includes a list of exemptions (for example, accessory dwelling units and affordable housing units are exempt). A building permit for a new dwelling generally requires a dwelling allocation from the Planning Director unless exempt (§ 17.500.030.B–D).

Link to design-review guidance: Sebastopol Design Review (first mention).

Specific plans & overlay districts

• Specific plans: Sebastopol’s zoning structure uses a Planned Community (PC) district process for area‑level plans; the PC district requires a policy statement and development plan and sets project‑specific standards at approval (see § 17.40.060 and related PC development criteria). The Code does not list any City-adopted, named citywide specific-plan chapter in the excerpts retrieved; individual PC districts are handled by the PC rezone + plan process.
• Overlay and combining districts: environmental and wetlands combining districts (W, WS, WF) and the ESOS combining district impose additional environmental submittal requirements, mandatory setbacks, surveys (vernal‑pool/rare‑plant surveys) and referral to state/federal agencies for projects in these areas — see § 17.44.040–.050 and § 17.46.050.
• Temporary & recovery overlays: the Code also includes a temporary REC Combining District and other program overlays with their own timelines and requirements (see the REC chapter entries such as Ch. 17.48).

Link to overlays: Sebastopol Overlay Districts (first mention).

Building permits & how the local permit path works in practice

• Building permits must comply with Title 17 entitlements and with state building and fire codes; the Code requires that building permits for new residential units be supported by the applicable land‑use entitlement and, where required, a dwelling allocation under the Growth Management Program (§ 17.500.030.D).
• The local ADU process is administratively approved by the Planning Director (Chapter 17.220): ADUs are processed via an administrative review with the Planning Department and then require building permits that meet the California Building Standards (Title 24) and local building/fire requirements (§ 17.220.020.E and related ADU provisions).
• For larger or discretionary projects (rezones, PC districts, conditional-use permits or projects requiring design review and environmental review), the Code sets out a public‑hearing process (decision authority varies by permit type — Planning Director, Planning Commission, or City Council) and an appeals process; see the permit chapters (e.g., 17.425 series and the public hearing chapter 17.460).

Link for building-code compliance: California Building Standards Code (first mention).

State housing law in Sebastopol — ADUs, density & affordable housing interactions

Summary of how state laws are implemented or referenced in local Title 17:

• Accessory Dwelling Units (ADUs) and Junior ADUs: Sebastopol expressly implements ADU rules consistent with Government Code § 65852.2 via Chapter 17.220. The local code sets local objective ADU standards (for example, maximum ADU size 840 sq ft for most parcels and 1,000 sq ft where parcel size is 10,000 sq ft or greater; height limits such as 17 ft for one‑story detached ADUs and 25 ft for permitted two‑story detached ADUs; and parking exemptions). ADUs are processed administratively by the Planning Director (see § 17.220.010–.030).

  • Representative ADU specifics from the local code: maximum floor area 840 sq. ft. (or 1,000 sq. ft. on lots ≥ 10,000 sq. ft.), attached expansion limited to 50% of existing living area, detached 1‑story height cap 17 ft, detached 2‑story cap 25 ft, and no parking requirement for ADUs in many cases (see § 17.220.020.D and § 17.220.020.14).
  • ADU permit processing: Planning Director administrative approval is required; conversions and some pre‑existing units may be approved subject to building code compliance (§ 17.220.020.E–G).
  • Link to local ADU guidance: Sebastopol ADUs (first mention).

• Density bonus / inclusionary housing: Sebastopol has an inclusionary housing program in Chapter 17.250 that implements local affordable-housing obligations and sets mechanisms for achieving deed‑restricted affordable units or in‑lieu fees; density‑bonus interaction is handled by the density allowances and inclusionary chapter procedures (see § 17.250.010).

• SB 9 / ministerial lot-splits & duplexes: the uploaded Title 17 excerpts reviewed for this overview do not contain explicit, SB 9–specific ministerial approval text or an explicit SB 9 implementation chapter (e.g., ministerial two‑unit/lot‑split streamlining language) in the retrieved materials. Users should verify current local practice with Planning staff, because recent state‑level changes (SB 9 and similar laws) are sometimes implemented by later ordinance amendments, not captured in older Title 17 drafts. Not found in the retrieved materials — verify with the jurisdiction.

• Rent control / tenant protections: a search of the retrieved Title 17 text did not show an adopted city rent control ordinance or local just-cause eviction controls in Title 17. If you need a definitive answer about local rent‑control ordinances, consult City staff or county/state resources. Not found in the retrieved materials — verify with Sebastopol.

Link to state housing-law overview (first mention): California housing laws and California ADU law.

Practical orientation — how to use the Code for a real project

• Step 1 — Identify the site’s zoning: consult the City’s Zoning Map (Title 17, Chapter 17.10) to determine the base district and any combining/overlay districts (wetlands, ESOS, REC).
• Step 2 — Read the district chapter for permitted uses and the district development-standard table (e.g., Residential = Ch. 17.20; Commercial/Industrial = Ch. 17.25) and the citywide general standards in Ch. 17.100.
• Step 3 — Confirm parking, landscaping, signage and other program-level requirements in the specialized chapters (parking in Ch. 17.110, landscaping and screening chapters, signage chapter). For parking, see § 17.110.020 and the off‑street parking charts.
• Step 4 — Determine whether the proposed work requires only administrative review (e.g., many ADUs per Ch. 17.220), or requires design review, conditional use permit, or PC rezoning (see the permit chapters around 17.425, 17.460, and the PC rules in 17.40).
• Step 5 — For new dwelling units, confirm whether a dwelling allocation is required under the Growth Management Program (Ch. 17.500) before a building permit can be issued; ADUs are exempt from the dwelling‑allocation limit (§ 17.500.030.C).

Information Gaps / Things to verify with City staff

• Current implementation of SB 9, ministerial duplex/lot‑split workflows (no SB 9–specific implementing text located in the retrieved Title 17 excerpts). Not found in the retrieved materials — verify with the City.
• Any recent amendments to the Zoning Code after the adopted Title 17 (2018 draft used here) — always check the City’s online municipal code or Planning Department for the latest ordinance updates. Not found in the retrieved materials — verify with the City.

Source References

• City of Sebastopol — Draft Title 17 Zoning Code (table of contents and text excerpts) — see for example § 17.04.010 (adoption/purpose) and organization listings.
• Chapter listing and district tables (Residential Ch. 17.20; Commercial/Industrial Ch. 17.25; Community Facilities Ch. 17.30; Open Space Ch. 17.32).
• Accessory Dwelling Units — Chapter 17.220 (ADU criteria, size, height, parking, administrative process) — see § 17.220.010–.030.
• Parking — Chapter 17.110 (off‑street parking requirements and tables, e.g., § 17.110.020).
• Wetlands / combining districts and ESOS — Chapter 17.44 and Chapter 17.46 (resource analysis, setbacks, vernal‑pool surveys).
• Growth Management Program (dwelling allocation limits) — Chapter 17.500, including § 17.500.030 on dwelling allocations/exemptions.