Rohnert Park — Development Standards

Last reviewed: July 2, 2026

Overview

This page explains the City of Rohnert Park rules for development standards (setbacks, heights, lot coverage, density, FAR, accessory-structure rules) as written in the local zoning ordinance (Title 17). The core development matrix is the Development Standards Table in § 17.10.020; supplemental rules for projections, accessory buildings, separations, and maximum housing unit size appear in related sections cited below. For procedural context see the city's Zoning overview and the general plan‑consistency rules that govern application of these standards (§ 17.02.060) .

Note: first-time readers who need off-street vehicle requirements should consult the city's parking standards; applicants should also check whether a project triggers design review, is inside an overlay district such as the DDAZ or SVPD, or invokes the local ADU chapter and State ADU law (ADUs); building-code compliance is separately enforced under the California Building Standards Code (Title 24).

How to read the ordinance

• The City’s Chapter 17.10—Development Standards contains the master table and footnotes; use it to read district rows across the dimensional columns (§ 17.10.020) .
• Projections into yards, accessory-structure setbacks, and separations are in § 17.10.040, § 17.10.050, and § 17.10.060 respectively .
• ADU-specific streamlining and sizing rules are in § 17.08.040 (ADUs/JADUs) and must be applied consistent with State law .

District-by-district standards (purpose, typical uses, key dimensional controls, where it applies)

Notes: the numeric values below are drawn from the Development Standards Table and associated footnotes in § 17.10.020; where a district’s purpose or FAR is described, that is cited to the zone descriptions in Article I — Residential Zoning Districts (Chapter 17.06) and related form‑based chapters where applicable .

R-R (Rural Residential)

• Purpose / typical uses: The R-R district preserves very low-density, large-lot, rural character near the city edge (single-family residential/agricultural transition) § 17.06.020 .
• Key dimensional standards (table): minimum lot 40,000 sq ft, maximum building height 35 ft (primary), front setback 50 ft, minimum interior side 10 ft, rear 50 ft, maximum lot coverage 30% — see § 17.10.020 .
• Where it applies: peripheral / low‑density neighborhoods identified on the zoning map; verify on the zoning map and with staff.

R-E (Estate Residential)

• Purpose / typical uses: R-E for estate lots (very low density single‑family) consistent with Estate General Plan designation § 17.06.020 .
• Key standards: minimum lot 17,000 sq ft, height 35 ft, front setback 25 ft, maximum lot coverage 40%, density 2 units/acre; consult § 17.10.020 for the full row .

R-L (Residential — Low Density)

• Purpose / typical uses: R-L aims at conventional suburban single‑family detached development (FAR 0.40) § 17.06.020 .
• Key standards: minimum lot 5,000 sq ft (with clustering exceptions), height 35 ft, front setback 20 ft, interior side 5 ft, rear 20 ft (reduced to 10 ft for certain one‑story additions; footnote), maximum lot coverage 50%, FAR 0.40 — see § 17.10.020 and footnotes .

R-M (Residential — Medium Density)

• Purpose / typical uses: R-M allows attached and detached single‑family housing and duplex types (FAR 0.55) § 17.06.020 .
• Key standards: minimum lot 3,700 sq ft, height 35 ft, front setback 20 ft, interior side may be eliminated for attached units (see footnote), rear 20 ft, open space and per-unit requirements apply; consult § 17.10.020 and footnotes for attached‑unit exceptions .

R-H (Residential — High Density) and DTR-H (Downtown R‑High)

• Purpose / typical uses: R-H for multifamily and higher-density housing, FAR 1.15; DTR-H matches R-H except located in the downtown PDA and uses the same standards unless otherwise noted § 17.06.020 .
• Key standards: R-H minimum lot 10,000 sq ft, height 45 ft, front setback 20 ft, interior side 5 ft (increased 1 ft per foot of height above 35 ft), lot coverage 40%, FAR 1.15; DTR-H permits taller buildings up to 60 ft in designated downtown zones — see § 17.10.020 and footnotes for corner/attached exceptions .

C-O, C-N, C-R (Commercial districts)

• Purpose / typical uses: C-O professional/administrative offices; C-N neighborhood commercial (small retail/food service); C-R regional commercial (shopping/entertainment). Permitted land uses and conditional uses are listed in the land‑use tables in Chapter 17.06 (Use Tables) — see § 17.06.720 / 17.06.720.B and § 17.06.030 for how to read use tables .
• Key dimensional standards (from table): building heights generally 35–65 ft depending on district, front setbacks 10–15 ft, interior side 10–15 ft, rear 10 ft, FAR commonly 0.4–1.0 depending on use and footnotes; refer to § 17.10.020 for district row values and footnotes that adjust FAR for hotels, industrial projects, or mixed uses .

I-L (Limited Industrial)

• Purpose / typical uses: light industrial, manufacturing, and warehouse where compatible with surrounding uses § 17.02.070 .
• Key standards: minimum lot 20,000 sq ft, height 45 ft, setbacks 15 ft front, FAR 0.5 (with footnote exceptions), lot coverage 60% — see § 17.10.020 .

M-U and DTM-U / Downtown Form‑Based (mixed‑use / downtown)

• Purpose / typical uses: M-U and the downtown DTM-U/DDAZ zones are intended for mixed‑use / downtown intensification. The form‑based DDAZ and SV Planned Development (SVPD / SOMO Village) overlay sets specific transect‑based standards (heights, frontage types, lot coverage) that can supersede the general table where adopted .
• Key dimensional standards: M-U rows show higher FARs (e.g., 1.5) and lot coverage allowances (up to 80%) with the possibility to reduce setbacks or eliminate them when approved by planning commission (see table notes and § 17.10.020 and the DDAZ/SVPD chapters) . The DDAZ Form‑Based codes list explicit story/ft limits and frontage/lot coverage specifics in Chapter 17.06.DDAZ (e.g., Downtown Core up to 7 stories / 85 ft to eave) .

PI, OS- / OS-EC (Public/Institutional and Open Space)

• Purpose / typical uses: PI for schools, civic facilities; OS for parks/open space and OS-EC for environmental conservation (OS rules often apply to developable portion only). Key sizes, setbacks, and FARs are in § 17.10.020; many OS zones have special open‑space design rules in Chapter 17.06 .

Planned Development (P‑D) and Specialty Overlays (SVPD, DDAZ)

• Purpose / typical uses: P‑D districts (including the SVPD / SOMO Village) are negotiated, site‑specific zones where a final development plan prescribes the specific development standards (minimum lot sizes, setbacks, heights, open space) that apply to the parcel(s) — see § 17.06.210 and the SVPD Article (Article XV.A) § 17.06.810–.820 .
• How it affects standards: if a parcel is in a P‑D or SVPD, the P‑D standards in the approved final development plan control; where the plan is silent, the general standards in Title 17 apply § 17.06.210(B) .

Quick reference table — core decision‑relevant numeric standards (selected districts)

(If a parenthetical footnote appears in the table, read the footnotes under § 17.10.020 for exceptions such as increased FAR for hotels in C‑R, and allowed reductions for attached units or downtown frontage types) .

Important supplemental standards (short summaries & citations)

• Projections into required yards (eaves, bay windows, balconies, porches): limited encroachments are allowed (e.g., up to 2 ft into side yards, 4 ft into front/rear), with conditions and utility‑easement restrictions § 17.10.040 .
• Separation between buildings: main‑to‑main minimum 10 ft, plus 1 ft extra separation per foot of height over 35 ft, and 5 ft min from main to detached accessory structures § 17.10.050 .
• Accessory structures: detached accessory structures must be behind the main building, cover no more than 10% of the rear yard (unless ADU), and side/rear setbacks are typically 3 ft (carports 5 ft) — see § 17.10.060 .
• Maximum size of housing units (formula): R‑zone unit size caps are set by formulas (e.g., R‑L: 600 sq ft + 0.40 × net lot area; R‑M: 400 sq ft + FAR factor) — see § 17.10.070 .
• ADUs/JADUs: accessory dwelling units are a permitted use in single‑ and multi‑family zones; Rohnert Park’s ADU chapter § 17.08.040 adopts size, height, setback, streamlining, and ministerial processing consistent with state law (e.g., 16–18 ft typical detached ADU height caps, ministerial 60‑day processing) — see § 17.08.040 .
• Project‑specific PD / SVPD / DDAZ standards: where a Planned Development, SOMO Village PD, or DDAZ overlay exists, the project‑specific plan or form‑based code sets the standards; those chapters instruct that their standards prevail when different from the general table § 17.06.210 and § 17.06.700–.740 .

Checklist — what an applicant must satisfy (minimum)

• Demonstrate General Plan consistency for the site (per § 17.02.060) .
• Use the § 17.10.020 Development Standards table to confirm lot size, setbacks, height, lot coverage, FAR and density for the parcel; include footnote reading for exceptions .
• Provide a scaled site plan showing building footprints, required setbacks, parking layout (see city parking rules), driveways, landscaping, and easements § 17.10.020; 17.10.040; 17.10.060 .
• If proposing an ADU/JADU, prepare ministerial ADU documentation consistent with § 17.08.040 and State ADU law; verify setbacks and height caps in ADU section .
• Confirm whether the parcel is subject to a P‑D, SVPD, or DDAZ overlay; if so, attach the approved final development plan or transect standards as the controlling document § 17.06.210; 17.06.820 .
• Determine whether Design Review is required under Chapter 17.06 (and DDAZ procedures) and submit elevations and materials accordingly (design review) .
• For any nonconforming conditions, confirm the applicability of nonconforming uses and whether a variance or exception is needed (see § 17.25 procedures) .

Risks & Ambiguities

Plain‑English summary

Rohnert Park’s Title 17 puts the basic size, height, setback, lot‑coverage and FAR rules in the Development Standards table (§ 17.10.020); accessory‑structure rules, projections, separations, and ADU streamlining are spelled out in adjacent sections (e.g., § 17.10.040–.070 and § 17.08.040). Planned Development or form‑based overlays (SVPD/DDAZ) can substitute parcel‑specific standards, so verify whether your site is inside one of those overlays before you design.

Source References

• § 17.10.010 — Purpose; Development standards chapter introduction .
• § 17.10.020 — Development Standards Table (core table of lot size, setbacks, heights, FAR, lot coverage, densities) .
• § 17.10.030 — Legally established yard setbacks (continuation of shorter setbacks allowed for expansions) .
• § 17.10.040 — Projections into yards (eaves, balconies, porches) .
• § 17.10.050 — Required separation between structures (main‑to‑main, accessory separations) .
• § 17.10.060 — Accessory structure location, coverage, and permit thresholds .
• § 17.10.070 — Maximum size of housing units (formula‑based caps by residential district) .
• § 17.06.010–.020 — Purpose and district descriptions for residential districts (R‑series) and context for allowed uses .
• § 17.06.210 — Planned Development (P‑D) general provisions and instruction to list project‑specific standards in final development plans .
• § 17.06.700–.740 — DDAZ / Downtown Form‑Based Code procedures and standards (walkable neighborhood and frontage rules) .
• § 17.08.040 — Accessory Dwelling Units (ADU / JADU) standards and streamlining (ministerial processing, sizing, height) .
• Rohnert Park municipal code excerpts and table extracts used above are from the uploaded Rohnert Park zoning code (Title 17) materials provided by the user .

Information Gaps

• Parcel‑specific final development plans (P‑D), adopted SVPD or project maps were not supplied; where a property is in a P‑D/SVPD the final plan is required to identify exact standards — Verify with the jurisdiction. Not found in retrieved materials: the city’s current live zoning map with parcel overlays.
• Some footnote cross‑references and design‑guideline specifics (e.g., precise DDAZ frontage measurement diagrams) are summarized in the ordinance but detailed graphics and site plans are not included in the supplied excerpts — check the published department exhibits or project file for graphics.
• If you require the exact permitted‑use list for a district (P/C/A designations per use), consult Table 17.06.720.B and the Use Tables in Chapter 17.06 — select uses were shown in snippets but a complete use table as published on the city website was not attached here. Verify with the jurisdiction.

Retrieved passages

• Rohnert Park Zoning Code (§ 4) High relevance show source text
• Rohnert Park Zoning Code (§ 3) High relevance show source text
• Rohnert Park Zoning Code (Section 17.06.230) High relevance show source text
• Rohnert Park Zoning Code (section of) High relevance show source text
• Rohnert Park Zoning Code (Section 17.10.070) High relevance show source text
• Rohnert Park Zoning Code (§ 4) High relevance show source text
• Rohnert Park Zoning Code (Section 17.06.250) High relevance show source text
• Rohnert Park Zoning Code (§ 3) High relevance show source text
• CBC § 66314 (§ 66314) High relevance show source text
• Rohnert Park Zoning Code (§ 4) High relevance show source text
• Rohnert Park Zoning Code (Section 17.08.040) High relevance show source text
• Rohnert Park Zoning Code (section no) High relevance show source text
• Rohnert Park Zoning Code (Section 21155) Medium relevance show source text
• Rohnert Park Zoning Code (§ 66317) Medium relevance show source text
• CBC § 66321 (§ 66321) Medium relevance show source text

Cited sections

• **§ 17.10.010** — Purpose; Development standards chapter introduction . (§ 17.10.010)
• **§ 17.10.020** — Development Standards Table (core table of lot size, setbacks, heights, FAR, lot coverage, densities) . (§ 17.10.020)
• **§ 17.10.030** — Legally established yard setbacks (continuation of shorter setbacks allowed for expansions) . (§ 17.10.030)
• **§ 17.10.040** — Projections into yards (eaves, balconies, porches) . (§ 17.10.040)
• **§ 17.10.050** — Required separation between structures (main‑to‑main, accessory separations) . (§ 17.10.050)
• **§ 17.10.060** — Accessory structure location, coverage, and permit thresholds . (§ 17.10.060)
• **§ 17.10.070** — Maximum size of housing units (formula‑based caps by residential district) . (§ 17.10.070)
• **§ 17.06.010–.020** — Purpose and district descriptions for residential districts (R‑series) and context for allowed uses . (§ 17.06.010)
• **§ 17.06.210** — Planned Development (P‑D) general provisions and instruction to list project‑specific standards in final development plans . (§ 17.06.210)
• **§ 17.06.700–.740** — DDAZ / Downtown Form‑Based Code procedures and standards (walkable neighborhood and frontage rules) . (§ 17.06.700)
• **§ 17.08.040** — Accessory Dwelling Units (ADU / JADU) standards and streamlining (ministerial processing, sizing, height) . (§ 17.08.040)
• Rohnert Park municipal code excerpts and table extracts used above are from the uploaded Rohnert Park zoning code (Title 17) materials provided by the user . (Title 17)
• RohnertPark_ZoningCode.md

• Official Rohnert Park code library