Local zoning · Santa Rosa

Santa Rosa — Development Standards

Q: How is building height measured in Santa Rosa?

Height measurement rules are in § 20-30.070 — the Code specifies how maximum height is calculated and lists exceptions; district tables then give maximum heights (e.g., 35 ft , 45 ft , 55 ft in various districts). Always apply § 20-30.070 when confirming compliance.

Q: Where do I find the FAR calculation rules (what counts toward floor area)?

FAR definitions and calculation rules are in § 20-23.060 ; the Code lists exclusions (crawlspaces, structured parking, porches/balconies, certain historic structure areas) and special counting rules for double-height interior spaces.

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

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Last reviewed: July 2, 2026

Overview

Santa Rosa's development standards are codified in Title 20 (the Zoning Code) and set the measurable site rules — setbacks, height limits, lot coverage, residential density, and where applicable, floor area ratio (FAR). The Zoning Code uses district-specific tables (e.g., Table 2-7, Table 2-8, Table 2-9) and technical measurement rules (setback and height measurement) to control building placement and bulk; see § 20-23.040, § 20-23.060, § 20-30.070, and § 20-30.110 for the controlling rules and tables in the Code.

This page focuses strictly on the Zoning Code development standards (not Title 24 building code, permits, or housing law). For related processes see Santa Rosa Zoning & planning overview and the City pages for parking, design review, overlay districts, and ADUs as they interact with development standards.

How the Code is structured (quick reference)

Dimensional standards are organized by zoning district in "Table 2-*" within the Zoning Code; those tables give minimum setbacks, maximum lot coverage, maximum height, and where applicable maximum density or FAR (density = units per acre; FAR = building floor area ÷ lot area). See § 20-23.040 (district tables) and § 20-23.060 (FAR rules and calculations).
Measurement rules (how to measure height and setbacks, vision triangles, etc.) are in § 20-30.070 and § 20-30.110. These are required reading when applying the numeric standards in the tables.
Design Review can impose larger setbacks, or other site-specific deviations; see the City design review chapter. The Code notes the Design Review process may require larger setbacks.

District-by-district development standards

Below are the Santa Rosa zoning districts for which the Zoning Code provides explicit development tables in the retrieved materials. Each subsection gives purpose, common uses, and the key numeric controls. All numeric standards below are taken from the Zoning Code Tables shown in the ordinance excerpts (see the Code references after each district).

CO (Office Commercial)

Purpose & typical uses: CO is intended for low-impact office and professional uses near residential areas; mixed office/residential conversions may be allowed depending on specific provisions. See Table 2-7 for details.
Key dimensional standards (Table 2-7 / § 20-23.040): front setback 15 ft (more if adjacent to residential), side interior 5 ft, rear 5 ft for one-story buildings (10 ft for two-story), maximum lot coverage 65%, maximum height 35 ft. Setback measurement rules: § 20-30.110.

CN (Neighborhood Commercial)

Purpose & typical uses: CN supports neighborhood retail and service uses that serve nearby residential neighborhoods. Mixed-use with residential is encouraged in some CN areas.
Key dimensional standards (Table 2-7 / § 20-23.040): front setback 7.5 ft where adjacent to a residential zone or use (none required elsewhere), side and rear setbacks vary with adjacency and design review; maximum lot coverage 85% for retail/service uses (some uses limited to 65%), and maximum height 45 ft (see exceptions).

CG (General Commercial)

Purpose & typical uses: CG accommodates more intensive commercial activity, auto-oriented and larger footprint uses.
Key dimensional standards (Table 2-7 / § 20-23.040): setbacks may be none except when adjacent to residential; maximum lot coverage 100% for the district; maximum height 55 ft (measurement rules apply).

CV (Commercial Village) and Core/Mixed-Use Districts (CMU, SMU, MMU, NMU, CSC)

Purpose & typical uses: CV and the Core/Mixed-Use districts (CMU, SMU, MMU, NMU, CSC) prioritize pedestrian-oriented, mixed-use development and downtown scale. New development is encouraged to include residential components.
Key dimensional standards (Table 2-8 / § 20-23.040 and FAR rules § 20-23.060): many CMU/SMU/MMU/NMU areas are regulated by FAR rather than strict density; where an FAR map applies, maximum base FAR is mapped and the Code requires new development to achieve at least the midpoint of the maximum FAR unless exceptions apply. Maximum heights vary by subarea (commonly 35 ft–55 ft depending on district). See the Code for the specific FAR map and the calculation rules (what counts toward floor area).

TV-M (Transit Village - Medium)

Purpose & typical uses: TV-M is a transit-oriented district supporting medium-density housing near transit. The district encourages pedestrian orientation and reduced setbacks to support transit ridership.
Key dimensional standards (Table 2-9 / § 20-23.040): minimum lot size: none required; residential maximum density 40 units per acre minimum (district establishes a minimum density target); front/side/rear setbacks: generally none except where required by the review authority (Design Review may require setbacks). Maximum lot coverage 100%; height limits referenced to § 20-30.070 and may be tied to assigned FAR areas.

BP, IL, IG (Business Park and Industrial)

Purpose & typical uses: BP (Business Park), IL (Light Industrial), IG (General Industrial) accommodate manufacturing, distribution, and large-site employment uses, with development standards tuned to operations and buffering from residential uses.
Key dimensional standards (Table 2-11 / § 20-23.040): minimum lot sizes (e.g., 20,000 sf in BP), setbacks adjacent to residential (7.5 ft front adjacent to R zone; interior side 5 ft when adjacent to residential), lot coverage varies or is CUP-determined (e.g., up to 85% in some IG areas), height commonly 55 ft (but may be set by CUP).

OSR, OSC, PI (Open Space / Public and Institutional)

Purpose & typical uses: OSR/OSC protect open space resources; PI is Public/Institutional for schools, parks, utilities.
Key dimensional standards (Table 2-13 / § 20-23.040): OSR front/side/rear setbacks and lot coverage are established by CUP and resource protection (e.g., maximum coverage may be 1% or 6,000 sf for OSR); PI setbacks often 15 ft front and corner, interior side 5 ft, rear 15 ft, maximum PI lot coverage often 65%, typical height 35 ft but PI can vary by CUP.

Notes about special rules and overlays

Many combining and overlay districts (historic -H, hillside, Station Area, AGF, etc.) add or change setbacks, FAR, or other site standards — for example properties north of 3rd Street with over 35 ft in height require Cultural Heritage Board and Design Review Board review in the -H district. See the Code combining district sections and the City's overlay district summaries. For overlay details see Santa Rosa Overlay Districts.

Quick standards table (decision-relevant extract)

Zoning District	Typical front setback	Max lot coverage	Max height (typical)	Density / FAR	Code Reference
CO	15 ft (adjacent to R)	65%	35 ft	Per Table 2-7	§ 20-23.040 (Table 2-7)
CN	7.5 ft (adjacent to R) / none elsewhere	85% (retail/service)	45 ft	Per Table 2-7	§ 20-23.040 (Table 2-7)
CG	none required (except adjacent to R)	100%	55 ft	Per Table 2-7	§ 20-23.040 (Table 2-7)
CMU / SMU / MMU / NMU	Varies — see Table 2-8	Varies by use	35–55 ft typical	FAR-controlled — mapped base FAR; mid-point target	§ 20-23.040, § 20-23.060
TV-M	generally none (Design Review may set)	100%	See § 20-30.070	40 u/ac target	§ 20-23.040 (Table 2-9)
BP / IL / IG	7.5 ft front when adjacent to R (BP)**	up to 85% (IG)	55 ft (typical)	CUP may control	§ 20-23.040 (Table 2-11)
OSR / OSC / PI	CUP-determined / 15 ft (PI)	OSR 1% or 6,000 sf; PI 65%	OSR & PI 35 ft typical	Very low / CUP	§ 20-23.040 (Table 2-13)

(These table extracts are the City’s starting standards; the Code notes that a subdivision, CUP, or Design Review may set different or additional requirements. See § 20-23.040 and the table notes.)

How FAR is handled (short)

The Code defines FAR and the calculation rules (what counts and what is excluded) in § 20-23.060: crawlspaces, structured parking, some historic building area, and certain outdoor spaces are excluded; double-height spaces may be counted double. New development in mapped FAR areas is expected to reach at least the midpoint of the maximum FAR (exceptions for parcel constraints exist).

ADUs and accessory structures

The Zoning Code incorporates State ADU rules but also applies local ADU-specific limits: accessory structures less than 50% of the ADU floor area are ministerial and must meet lot coverage and setback requirements; detached accessory structure height 16 ft per § 20-42.030 (local ADU subsection), with additional rules for hillside, historic districts, and when 800 sf thresholds are exceeded. Check the local ADU section and the City's ADU guidance. See Santa Rosa ADUs and the Zoning Code ADU rules (see § 20-42.030) for full standards.

Checklist — what an applicant must demonstrate (minimum)

Confirm zoning district and applicable overlay(s) and read the district table (e.g., Table 2-7 / Table 2-8 / Table 2-9). See § 20-23.040.
Show measured setbacks per § 20-30.110 and site plan demonstrating front/side/rear clearance.
Show building heights measured per § 20-30.070 and confirm any height exceptions.
Calculate lot coverage and, if applicable, FAR using the Code’s definitions (see § 20-23.060).
If in a mapped FAR area (CMU/SMU/MMU/NMU), demonstrate how the project meets the required midpoint-of-FAR target or show constraints justifying lower FAR. § 20-23.060.
Review Design Review triggers early (Design Review can increase setbacks or impose design-based conditions); consult the City’s design review page and the Code notes.
If proposing an ADU, ensure ADU-specific setbacks, height caps, and ministerial processing conditions are met per the ADU section (see § 20-42.030) and state ADU law. See Santa Rosa ADUs and California ADU law.

Risks & Ambiguities

Issue	Why it matters	What to verify
Overlay districts (historic, hillside, -SA, AGF, -H) change numeric standards	Overlays can require larger setbacks, additional review, or different FAR/height treatment; failing to identify overlays leads to noncompliant design	Confirm overlays on the parcel and read the combining district text; verify Design Review or Cultural Heritage Board triggers (e.g., north of 3rd Street > 35 ft in -H). See overlay combining district notes.
FAR mapping vs. district table numbers	Some central districts are FAR-controlled rather than density-controlled; an applicant using the wrong metric can under- or over-build	Review the CMU/SMU/MMU/NMU FAR map and § 20-23.060 FAR calculation rules.
Measurement conventions (height, setbacks)	Height and setback measurement rules (e.g., top of roof, eave, slope measurement) materially affect compliance	Read § 20-30.070 (height measurement) and § 20-30.110 (setbacks / vision triangles) and confirm with plan reviewer.
Conflicting CUP or PD conditions	Past approvals (CUPs, PDs, subdivisions) may impose site-specific deviations from the numeric tables	Pull the lot’s land-use history and recorded conditions; the Code allows CUP/subdivision to set different limits. § 20-23.040 notes.
ADU local rules vs. State law updates	State ADU law imposes statewide limits that can preempt some local rules (e.g., minimum 4-ft side/rear for ADU)	Cross-check local ADU section (§ 20-42.030) with current State ADU law; where the local ordinance conflicts, state law may control — verify with Planning.

Plain-English Summary

Santa Rosa’s Title 20 sets district-by-district numeric standards (setbacks, lot coverage, height, density or FAR) in tables (e.g., Table 2-7, 2-8, 2-9); always measure setbacks and height per the measurement sections and check for overlays or Design Review that can change the numbers. Key references are § 20-23.040 (district tables), § 20-23.060 (FAR), § 20-30.070 (height), and § 20-30.110 (setbacks).

Source References

Title 20 Zoning Code—district tables and notes (see Tables 2-7, 2-8, 2-9, 2-11, 2-13). Code locations cited above: § 20-23.040 (Tables 2-7/2-8/2-9/2-11/2-13).
FAR definitions, calculation rules, and midpoint target: § 20-23.060.
Measurement rules for height and setbacks: § 20-30.070 and § 20-30.110.
ADU-specific standards and ministerial rules: (local ADU section; see the ADU subsection in Title 20) — local ADU rules including accessory structure height § 20-42.030 referenced in Code excerpts.
Temporary housing development standards (setbacks, height, unit limits): local temporary housing section in Title 20.
Santa Rosa planning pages mentioned in text: Santa Rosa zoning & planning overview, Santa Rosa Zoning, Santa Rosa Parking, Santa Rosa Design Review, Santa Rosa Overlay Districts, Santa Rosa ADUs. (Internal navigation links to City resources cited for applicant process context.)

Sources

Retrieved passages

Santa Rosa Zoning Code (§ 1) High relevance
Santa Rosa Zoning Code (chapter and) High relevance
Santa Rosa Zoning Code High relevance
Santa Rosa Zoning Code High relevance
Santa Rosa Zoning Code (Title 20) High relevance
CBC § 66314 (§ 66314) High relevance
CFC § 20 (Section 20-61.030.B) High relevance
CBC § 20 (Section 20-52.040.) High relevance

Cited sections

Official Santa Rosa code library

Frequently asked questions

What can I build on an R-1 lot in Santa Rosa?

R-1 is the single-family residential district; the Zoning Code provides R-district standards in the residential district tables (setbacks, lot coverage, height limits). The retrieved excerpts do not include the full R-1 table in the materials supplied here, so specific numeric R-1 standards are Not found in retrieved materials — Verify with the City and consult § 20-23.040 (residential district tables) for the exact R-1 front/side/rear setbacks and coverage.

What are Santa Rosa setback requirements?

Setback requirements depend on the zoning district table (for example Table 2-7 and Table 2-9 list district setbacks). Setback measurement rules are in § 20-30.110; note the Code and Design Review process can require larger setbacks. See Table 2-7 for commercial setbacks and Table 2-9 for TV-M transit setbacks.

How is building height measured in Santa Rosa?

Height measurement rules are in § 20-30.070 — the Code specifies how maximum height is calculated and lists exceptions; district tables then give maximum heights (e.g., 35 ft, 45 ft, 55 ft in various districts). Always apply § 20-30.070 when confirming compliance.

Does Santa Rosa use FAR and where does it apply?

Yes. Certain central/mixed-use districts (CMU, SMU, MMU, NMU) are governed by mapped FAR limits rather than simple density caps. FAR is defined and the calculation rules (what counts toward floor area, exclusions, double-counting for tall lobbies, etc.) are in § 20-23.060; the Code requires new development to achieve the midpoint of the maximum FAR unless constrained.

Do I need Design Review for a project that changes setbacks or height?

Possibly. The Code expressly notes the Design Review process may require larger setbacks and several combining districts trigger additional review (e.g., the -H combining district north of 3rd Street for > 35 ft). Check the project triggers in the Zoning Code and consult the City design review page.

What are the lot coverage limits in commercial districts?

Lot coverage is district-specific. For example, Table 2-7 shows CO max coverage 65%, CN up to 85% for many retail/service uses (some uses limited to 65%), and CG up to 100%. Always confirm the exact use category and the applicable line in § 20-23.040 (Table 2-7).

Where do I find the FAR calculation rules (what counts toward floor area)?

FAR definitions and calculation rules are in § 20-23.060; the Code lists exclusions (crawlspaces, structured parking, porches/balconies, certain historic structure areas) and special counting rules for double-height interior spaces.

Are ADU setbacks and size governed by the Zoning Code?

Yes. Local ADU rules are in the Zoning Code ADU section (see the ADU subsection), including ministerial processing rules, accessory structure height limits (16 ft for some accessory structures), and special hillside/historic district provisions. State ADU law also applies and can supersede local provisions in some instances — verify both § 20-42.030 (local ADU rules) and current state ADU statutes.

What happens if a prior CUP or subdivision set different standards for my lot?

The Code states that subdivision or CUP approvals may establish site-specific minimum lot area, maximum lot coverage, setbacks, or dimensions based on site characteristics; in such cases, the recorded CUP/subdivision conditions control. Check the property’s recorded approvals and the applicable Table notes in § 20-23.040.

Where do I confirm the exact numeric standards for my parcel?

Start with the parcel’s zoning designation on the City’s zoning map and then read the district table in § 20-23.040 for that district (Table 2-7, 2-8, 2-9, etc.). Then apply measurement rules (§ 20-30.070, § 20-30.110) and check overlays/combining districts for additional rules. If in a mapped FAR area, consult § 20-23.060 and the FAR map. ---

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