Local zoning · Sebastopol

Sebastopol — Development Standards

Development Standards under the Sebastopol local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

This page summarizes the development standards in the City of Sebastopol’s Draft Title 17: Zoning Code that control setbacks, height, lot coverage, density, and floor‑area ratio (FAR). It is organized district‑by‑district and ties each numeric rule to the controlling municipal code section so you can verify specifics with the official ordinance. For process rules you will also want to check related topics such as the City’s rules for parking, design review, and ADUs.

Note: this page interprets the Draft Title 17 materials provided; if a parcel‑specific issue arises, Verify with the jurisdiction.

How to use this page

  • Read the district subsection that matches your zoning (e.g., R1, R6, CD).
  • Use the table below for quick comparison of the most decision‑relevant numbers (height, setbacks, lot coverage, FAR/density). Each numeric entry cites the ordinance § and the file preview used here.
  • See the Checklist (page end) for what to assemble before submitting plans.

District-by-district development standards

The table and subsections below pull directly from the Draft Title 17 tables and chapters in the Sebastopol zoning document. Each numeric rule is shown in bold and is followed by the controlling code citation.

Residential districts (Table 17.20‑2 summary)

The City organizes residential zones as R1, R2, R3, R4, R5, R6, R7, and RMH (mobile home park). Table 17.20‑2 lists dimensional standards and is summarized here; see § 17.20.030 for applicability and § 17.20.040 for open space rules.

Key takeaways:

  • Maximum building height (main buildings): 30 ft, 2 stories in R1–R7 and RMH (§ 17.20.030) .
  • Accessory buildings height: 17 ft across residential zones (§ 17.20.030) .
  • Front setbacks vary by zone (examples below) and are in Table 17.20‑2 (§ 17.20.030) .
  • Lot coverage is tabulated by parcel size in the residential table (e.g., 50% on parcels ≤ 5,000 sf in many zones) — see Table 17.20‑2 (§ 17.20.030) .
  • Minimum and maximum residential densities are zone‑specific (e.g., R6 and R7 list maximums expressed as 1 DU per X sf) — Table 17.20‑2 (§ 17.20.030) .
  • Open space: private and common open space standards are in § 17.20.040 (e.g., private patios counted only when ≥ 30 sf and dimension ≥ 5 ft) .

Practical notes:

  • The R‑zones include allowances for cul‑de‑sac lot frontage reductions and front‑yard averaging where a block is already built out; check the footnotes to Table 17.20‑2 for those rules (§ 17.20.030) .
  • Mechanical equipment and accessory building rear/side setbacks have special minimums (often no less than 5 ft for mechanical equipment) — see the table footnotes (§ 17.20.030) .

Example district subsections (high‑use zones):

R1 (Very low density single‑family)

  • Purpose: implements the “Very Low Density Residential” GP category; allows up to 1 unit/acre (§ 17.20.010) .
  • Typical permitted uses: detached single‑family dwellings, accessory dwellings (where allowed) (§ 17.20.020) .
  • Key standards (Table 17.20‑2): minimum interior lot area 1 ac (43,560 sf); minimum lot width 150 ft; front yard = 30 ft; rear yard = 20% of lot depth (min 20 ft, max 50 ft); max height = 30 ft/2 stories (§ 17.20.030) .

R5 / R6 / R7 (higher density residential)

  • Purpose: R5 supports townhomes/duplexes; R6 and R7 are for multifamily (R7 highest density) (§ 17.20.010) .
  • Density: R5 up to ~12 du/acre, R6 ~12.1–17.4 du/acre, R7 ~12.1–25 du/acre (purpose statements) (§ 17.20.010) .
  • Setbacks: front yards reduce across zones (example: R5 front = 15 ft, R7 front = 10 ft) — see Table 17.20‑2 (§ 17.20.030) .
  • Lot coverage: varies by lot size per Table 17.20‑2 (e.g., 40% or 50% thresholds depending on parcel area) (§ 17.20.030) .
  • Affordable housing exceptions: deed‑restricted affordable housing can have specific height allowances (see table footnotes and conditional provisions) (§ 17.20.030) .

RMH (Mobile Home Park)

  • Purpose: master planned mobile home park standards; minimum park area 1.5 ac and special design rules apply (§ 17.20.010 and Table 17.20‑2) .

Source table: Table 17.20‑2 in § 17.20.030 (development standards for residential zones).

Small‑lot subdivision standards (special residential rules)

Small‑lot subdivisions (a separate set of standards that can modify underlying R‑district standards) are found at § 17.230.020 – § 17.230.070:

  • Minimum lot sizes for small‑lot subdivisions: allowed on parcels ≥ 15,000 sf in R3/R4 and ≥ 8,000 sf in R5–R7; minimum lot size 1,500 sf (subject to Planning Commission discretion) (§ 17.230.020) .
  • Setbacks (small‑lot): front = 15 ft (covered porch can extend 7 ft), rear = 10 ft, interior side = 4 ft, street side = 15 ft (§ 17.230.030) .
  • Max height for small‑lot subdivisions: 30 ft (§ 17.230.050) .
  • Max lot coverage: 65% (§ 17.230.060) .

Accessory dwelling units (ADUs and JADUs)

  • ADU rules are in the ADU chapter (administrative approvals, setbacks, heights, parking exemptions). Key points from the draft:
    • ADUs are permitted in residential zones and not counted as “development units” under the growth management program (§ 17.220 series) .
    • Setbacks: Attached ADUs and two‑story ADUs follow the primary residence setbacks; detached one‑story ADUs may have one‑half of the primary side/rear setbacks but not less than 5 ft (§ 17.220.030) .
    • Height limits (local): one‑story detached ADU not to exceed 17 ft, two‑story detached ADU not to exceed 25 ft in the local draft; state ADU law may supersede some local limits—verify with state ADU rules and the City (§ 17.220 and state law) .
    • Parking: the draft says no parking requirement for ADUs in many cases; when demolition of a garage occurs, replacement parking may be configured flexibly (§ 17.220). .

Practical link: consult the City’s ADU page for local process expectations and the California ADU law for state backstops.

Commercial, Office, and Industrial zones (Table 17.25‑2)

Commercial and industrial standards are summarized in Table 17.25‑2 (see § 17.25 chapter references). Highlights:

  • Districts: CO (Office), CG (General Commercial), CD (Central Core), M (Manufacturing), OLM, CM (Commercial Mixed?) — each table column lists min lot area, min lot width, FAR, and heights.
  • FAR (non‑residential): typical maximum FAR = 1.5 in CO/CG, M = 0.75, CD allows min 1.0 / max 2.5 for new buildings (Table 17.25‑2) (§ 17.25 table) .
  • Maximum building heights: range by district; e.g., CO/CG 32 ft / 2 stories, CD up to 40 ft / 3 stories (and 50 ft / 4 stories in some cases with CUP) — see Table 17.25‑2 and footnotes (§ 17.25) .
  • Setbacks: many commercial zones allow 0 ft side and corner setbacks and minimal front setbacks (Central Core is designed for zero front setback in some contexts); when abutting residential zones, rear yard setbacks typically require 20 ft (§ 17.25 table) .
  • When a commercial/industrial site abuts residential: transitional buffering and screening standards apply (see § 17.320 referenced in the table) .

Note on design review: many commercial zones anticipate zero front setbacks “unless the Design Review Board determines a different setback is appropriate,” so expect design review to influence final front setback in the Central Core and other areas (§ 17.25 table footnotes) . Consult the City’s design review page early in project planning.

Community Facilities district (CF)

  • Table 17.30‑2 lists CF development standards: maximum building height 32 ft, front yard 15 ft, side yard 5 ft, rear yard 15 ft, and FAR rates that vary by use (e.g., community facilities FAR = 2.0, municipal facilities = 3.0, parks/open space = 0.10) (§ 17.30.030) .
  • When CF abuts residential, dense landscaping and a solid six‑foot fence are required along the abutting lot line (§ 17.30.030) .

Open Space district (OS)

  • OS sets very modest development: one story, not to exceed 17 ft; setbacks front 20 ft, side 10 ft, rear 20 ft; max FAR = 0.10 (§ 17.32.030) .
  • Uses are limited to passive recreation, habitat preservation, and similar (§ 17.32.020) .

Planned Community district (PC)

  • PC is master‑plan driven; most standards are established via an approved development plan and are discretionary (see § 17.40.010–.030) .

Quick standards comparison table (decision‑relevant)

District Typical max height Typical front setback Lot coverage / FAR Typical density limit Code Reference
R1 30 ft (2 stories) 30 ft parcel‑size based (e.g., 50% on ≤5,000 sf) up to 1 DU/acre § 17.20.030
R5 30 ft (2 stories) 15 ft parcel‑size based (see table) up to ~12 DU/acre § 17.20.030
R6 30 ft (2 stories) 15 ft parcel‑size based ~12.1–17.4 DU/acre § 17.20.030
R7 30 ft (2 stories) 10 ft parcel‑size based ~12.1–25 DU/acre § 17.20.030
Small lot subdivision 30 ft front 15 ft / rear 10 ft / side 4 ft 65% max min lot size 1,500 sf (subdivision level) § 17.230.030–060
CD (Central Core) 40 ft / 3 stories (50 ft / 4 possible) often 0 ft (zero build‑to) FAR min 1.0, max 2.5 (new bldgs) mixed‑use density rules Table 17.25‑2 (§ 17.25)
CO / CG 32 ft / 2 stories 0–10 ft depending on street FAR ~1.5 typical 1 DU per X sf per table Table 17.25‑2 (§ 17.25)
CF 32 ft 15 ft FAR 2.0 (community) N/A § 17.30.030
OS 17 ft (one story) 20 ft FAR 0.10 N/A § 17.32.030

(See the full zone tables in Table 17.20‑2, Table 17.25‑2, Table 17.30‑2.)

Checklist — what an applicant must satisfy for a typical development review

  • Confirm the parcel zoning and overlay(s) that apply (check the Zoning Map; overlay rules may change dimensional standards) — see Sebastopol Zoning.
  • Meet or document compliance with the zone’s setbacks, heights, lot coverage, and density/FAR per the applicable table (e.g., Table 17.20‑2 for residential; § 17.20.030) .
  • Prepare a site plan showing building envelopes, parking layout per SMC 17.110 (parking standards), and required open space per § 17.20.040 .
  • If in a commercial or Central Core district, anticipate design review and provide pedestrian/streetscape treatments where zero front setback is proposed (central core footnotes) (§ 17.25).
  • For ADUs, follow the ADU chapter rules (setbacks, height caps, and parking exemptions); ADU approvals are administrative (§ 17.220) .
  • If the site abuts residential zones, include required buffering/screening (dense landscaping or 6 ft fence) — see the CF and commercial tables (§ 17.30.030, Table 17.25‑2) .
  • For projects proposing additional height or lot coverage exceptions (e.g., 10% lot coverage increase for affordable housing), include findings and evidence to support the Planning Commission discretionary approval (see Table footnotes) (§ 17.20.030 notes) .
  • Verify parking and loading per SMC 17.110 and provide required bicycle parking and rideshare spaces where applicable (§ 17.110) .

Risks & Ambiguities

Issue Why it matters What to verify
FAR rules for residential zones The residential tables show lot coverage and density but do not clearly list a residential FAR in the single table provided here Verify whether a specific FAR applies in your residential zone in the full adopted Title 17 (Not found in retrieved materials for explicit residential FAR) — confirm with Planning Dept.
Design Review discretion on front setbacks in commercial/CD Footnotes say zero front setback is standard but the Design Review Board may require a different offset — this affects build‑to lines and façade design Confirm early with the City’s Design Review staff and reference the Central Core footnotes (§ 17.25 footnotes)
ADU local height caps vs. state ADU law State ADU law can limit local standards that effectively prohibit an 800 sf ADU; local chapter lists 17 ft/25 ft local caps in places that may conflict with state standards For ADU projects, cross‑check § 17.220 with current state ADU statutes and the City’s ADU guidance (state law may supersede)
Lot coverage exceptions/percentages Table footnotes allow a Planning Commission increase up to 10% in some cases — this is discretionary and conditioned If you are seeking an increase, prepare open space/recreation evidence; confirm what findings are required (§ 17.20.030 footnotes)
Overlay district effects Overlays (e.g., historic, flood) can modify setbacks, heights, or require extra review — the base table may not show overlay modifications Check the Overlay Districts page and the specific overlay chapter in Title 17 (overlay-specific requirements Not found in retrieved materials; Verify with Planning)

Plain‑English summary

Sebastopol’s Draft Title 17 sets zone‑by‑zone numeric rules you must meet: most residential zones cap main building height at 30 ft / two stories, front setbacks range from 30 ft (R1) down to 10–15 ft in higher density zones, lot coverage is tied to parcel size and appears in Table 17.20‑2, and commercial zones use FAR and shorter setbacks (Central Core commonly allows 0 ft front setback). ADUs have special, more flexible rules (smaller setbacks, parking exemptions) but must still meet the ADU chapter rules. Always verify overlay impacts and design review expectations. (§ 17.20.030, § 17.25 tables, § 17.230 small‑lot rules, § 17.220 ADUs.)

Source References

  • Draft Title 17: Zoning Code — Chapter 17.20 (Residential districts) and Table 17.20‑2; development standards and footnotes (§ 17.20.030, § 17.20.040)
  • Draft Title 17: Zoning Code — Chapter 17.23 (Small lot subdivisions) (§ 17.230.020 – 17.230.070)
  • Draft Title 17: Zoning Code — Table 17.25‑2 (Commercial, office, industrial development standards) (§ 17.25 table)
  • Draft Title 17: Zoning Code — Chapter 17.30 (CF district / Table 17.30‑2) (§ 17.30.030)
  • Draft Title 17: Zoning Code — Chapter 17.32 (OS district / Table 17.32‑1) (§ 17.32.030)
  • Draft Title 17: Zoning Code — ADU provisions (SMC 17.220 series; ADU criteria and setbacks) (§ 17.220.030 and related paragraphs)
  • Draft Title 17: Zoning Code — Parking standards referenced at SMC 17.110 (vehicle, bicycle, rideshare) — see Table excerpts and parking chapter references (§ 17.110)

(These source excerpts are from the Sebastopol Draft Title 17 materials provided for this analysis.)

Sources

Retrieved passages

  • Sebastopol Zoning Code (Title 17) High relevance
  • Sebastopol Zoning Code (Title 17) High relevance
  • Sebastopol Zoning Code (Title 17) High relevance
  • CBC § 66314 (§ 66314) High relevance
  • Sebastopol Zoning Code (Chapter 17.500) High relevance
  • Sebastopol Zoning Code (§ 66317) High relevance
  • CBC § 2017 (Title 17) High relevance
  • Sebastopol Zoning Code (Title 17) High relevance
  • Sebastopol Zoning Code (Title 17) High relevance
  • Sebastopol Zoning Code (Title 17) High relevance
  • Sebastopol Zoning Code (Title 17) High relevance
  • CBC § R1 (Title 17) High relevance
  • Sebastopol Zoning Code (Chapter 17.320) High relevance
  • Sebastopol Zoning Code (Title 17) High relevance

Cited sections

Frequently asked questions

What can I build on an R1 lot in Sebastopol?

You can build uses allowed in R1, principally a detached single‑family dwelling and accessory uses listed in Table 17.20‑1; R1 implements very low density (up to 1 unit/acre) and its dimensional standards (lot size, frontage, setbacks, height) are in Table 17.20‑2 and § 17.20.030.

What are Sebastopol’s setback requirements for single‑family zones?

Setbacks are zone‑specific in Table 17.20‑2 (front yards typically 30 ft in lower density zones and reduced in higher density zones; interior side, street side, and rear yard percentages/feet are listed there). See § 17.20.030 for the table and footnotes.

Do I need design review for a commercial project in Sebastopol?

Many commercial projects — especially in the Central Core and Planned Community contexts — are subject to design review; footnotes to the commercial tables explicitly tie zero front setbacks and pedestrian amenities to Design Review Board determinations (Table 17.25‑2 and its notes) (§ 17.25)

What are Sebastopol’s height limits?

Most residential zones (R1–R7) set main building heights at 30 ft / 2 stories; accessory buildings 17 ft. Commercial zones vary (e.g., CO/CG = 32 ft / 2 stories, CD up to 40–50 ft in some cases). See Table 17.20‑2 and Table 17.25‑2 (§ 17.20.030, Table 17.25‑2).

How is lot coverage calculated in Sebastopol?

Lot coverage percentages are listed by parcel‑size bands in Table 17.20‑2 for residential zones (e.g., 50% for parcels ≤ 5,000 sf in many zones), and special rules/footnotes may allow a Planning Commission increase (see § 17.20.030 and table footnotes).

What FAR rules apply in commercial zones?

Commercial and office zones list maximum FAR values in Table 17.25‑2 (e.g., 1.5 typical; CD may allow min 1.0 / max 2.5 for new buildings). See the commercial table and its footnotes in § 17.25.

Can I build an ADU closer than the primary residence setbacks?

Yes — the ADU chapter allows detached one‑story ADUs to use one‑half of the primary residence side and rear setbacks (but not less than 5 ft), while attached and two‑story ADUs generally follow primary residence setbacks. See the ADU provisions in § 17.220.

If my commercial site abuts residential, what buffering is required?

When a commercial or CF lot abuts a residential district, the tables require screening—for example, dense landscaping or a solid 6 ft fence along the abutting line; transitional setbacks may also apply (see Table 17.25‑2 and § 17.30.030).

Where are small‑lot subdivision standards and how do they differ?

Small‑lot subdivision standards are in § 17.230.020 – .070: smaller minimum parcel sizes (down to 1,500 sf), fixed setbacks (front 15 ft, rear 10 ft, side 4 ft), max height 30 ft, and max lot coverage 65% for those subdivisions (§ 17.230.030–060)

Does Sebastopol use density caps or a growth management system?

Yes — the City has a City Growth Management Program limiting dwelling allocations (see Chapter 17.500). Some units (e.g., ADUs, affordable housing, replacement units) are exempt from annual allocation limits; consult § 17.500 for rules. (Growth management chapter excerpt provided in the draft materials.)

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