Rio Vista — Land Use

Last reviewed: July 2, 2026

Overview

This page summarizes what Rio Vista's local zoning ordinance (Title 17) says about land use: which uses are permitted by district, which require a conditional use (use permit), and the most decision‑relevant dimensional and development rules that control whether a use will be allowed. All statements below are grounded in Rio Vista Municipal Code Title 17; specific controlling code citations are included for each rule (§ citations) and the municipal code extracts used are cited. For procedural rules (use permits, site & architectural review, parking) see the cited sections and the linked topics below.

For related rules see the city's pages on parking, development standards, design review, overlay districts, ADUs, and note that technical building code requirements are in the California Building Standards Code.

District-by-district land use summary

Below are the main zoning districts established in Title 17 with the ordinance's stated purpose, typical permitted uses, key dimensional/development standards (where the ordinance provides numeric standards), and where that district applies procedurally (e.g., required approvals).

Notes on how citations are used: each district statement references the Rio Vista code section(s) that define uses and standards (for example § 17.08.020). The municipal code file excerpts used for this page are available in the retrieved ordinance excerpts cited inline (file citation markers).

R-E-1 (Residential Estate, One Acre) — § 17.10

• Purpose: Large‑lot residential / estate development where one‑acre lots are required; preserves low‑density, estate character. See § 17.10.010.
• Typical permitted uses: single‑family dwellings, accessory dwellings, agricultural operations, accessory buildings, home occupations, adult day care, family day care homes, employee agricultural housing (as allowed by state Employee Housing Act). See § 17.10.020.
• Key dimensional/parking standards: Minimum site area and yard schedule are set in the zoning schedule for R‑E‑1 (the code uses a zoning schedule in § 17.06.010 and specific R‑E‑1 minima in § 17.10.040). See § 17.06.010 and § 17.10.040 for the numeric minima; parking: § 17.10.090 requires a minimum of two covered off‑street spaces per dwelling unit.
• Approvals: Site and architectural review applies where specified; conditional uses require the findings in § 17.66.070.

R-1 (Residential Low Density) — § 17.08

• Purpose: Urban single‑family neighborhoods. See § 17.08.010.
• Typical permitted uses: single‑family and mobile homes, accessory dwelling units, home occupations, accessory buildings, daycare (adult/family), residential care facilities, supportive and transitional housing. See § 17.08.020.
• Key dimensional/standards: Title 17 provides minimum lot area, yards and maximum heights in the R‑1 chapter and the zoning schedule (§ 17.08.040 and § 17.06.010) — consult those sections for numeric front/side/rear yard and lot area minima. Site & architectural review procedures for single‑family dwellings are referenced in § 17.16.110 and the R‑1 chapter.
• Approvals: Conditional uses must meet § 17.66.070 findings; some single‑family projects are subject to the city's site and architectural review processes (Chapter 17.60).

R-2 (Residential Medium Density) — § 17.12

• Purpose: Mix of single‑unit and small multi‑unit dwellings at medium density. See § 17.12.010.
• Typical permitted uses: one‑family dwellings, duplexes/triplexes, accessory dwelling units, home occupations, day cares, residential care, supportive/transitional housing. See § 17.12.020.
• Key dimensional/standards: Minimum land area per unit rules and minimum footage rules (corner/interior lot widths, lot depth ratios) are in § 17.12.050–.070 and the zoning schedule (§ 17.06.010). Parking and building height rules are in the R‑2 chapter.

R-3 (Residential High Density) — § 17.14

• Purpose: High‑density multiple dwellings and associated community services. See § 17.14.010.
• Typical permitted uses: single‑family, duplexes, triplexes, multiple dwellings, dwelling groups, ADUs, home occupations, daycare, residential care, supportive/transitional housing. See § 17.14.020.
• Key dimensional/standards: Parking: 1.5 spaces per dwelling unit and screening rules for parking (see § 17.14.040). Maximum main building height: 35 feet; accessory buildings 15 feet (see § 17.14.050). Minimum widths and lot proportion rules are in § 17.14.060.

R-4 (Residential High Density with limited commercial) — § 17.16

• Purpose: Like R‑3 but allows small‑scale limited office/commercial uses by conditional use permit to match neighborhood scale. See § 17.16.010.
• Typical permitted uses: Same as R‑3 for residential; select small commercial uses allowed with a conditional use permit (see § 17.16.030).
• Key dimensional/standards: Maximum lot coverage 60% (see § 17.16.100), height and parking standards follow the residential chapters unless otherwise noted. Site and architectural review is required for new exterior changes (§ 17.16.110).

C-1 (Neighborhood Commercial) — § 17.18

• Purpose: Small‑scale neighborhood retail and services with a pedestrian orientation. See § 17.18.010.
• Typical permitted uses: Local retail/service (grocery, bakery, drugstore, barber/beauty, professional offices), restaurants/cafés (no entertainment/dancing), commercial parking, adult/ family day care; similar neighborhood‑scaled uses allowed by right. See § 17.18.020.
• Conditional uses: Parks, government offices, public/semi‑public buildings, convalescent care, nursery schools, upper‑floor residential in mixed buildings, plus other limited commercial uses with a permit (§ 17.18.030).
• Key standards: Maximum building height 35 ft; accessory building 15 ft; yard rules and parking standards are in the chapter. See § 17.18.040–.060.
• Approvals: Site and architectural review as prescribed in Chapter 17.60 is required for many projects.

C-2 (Community Commercial) — § 17.20

• Purpose: Full range of downtown/community commercial services (central business area). See § 17.20.010.
• Typical permitted uses: retail stores inside buildings, business/professional offices, theatres, clinics, hotels/motels, restaurants, upper‑floor or ground‑floor residential (when designed accordingly), auto parking lots, and accessory uses (ADUs allowed where indicated). See § 17.20.020.
• Conditional uses: Bakeries/creameries/laundries, printing, mortuaries, museums, government offices, animal hospitals, cocktail lounges as accessory uses, day care centers, service stations, and other limited commercial uses with findings (§ 17.20.030).
• Key standards: Site & architectural approval required for new structures and exterior improvements (§ 17.20.040). Minimum side yard rules and loading rules are in the chapter.

C-3 / C-3‑I (General & Service Commercial + light industrial) — § 17.24

• Purpose: Heavier commercial and lighter industrial uses that are incompatible with downtown retail but serve important storage/manufacturing functions. See § 17.24.010.
• Typical permitted uses: wholesale, storage/warehousing, vehicle/boat/farm implement sales & repair, building material yards, equipment rental, bakeries and light manufacturing (non‑odorous); some uses (auto body, painting) only when fully enclosed. See § 17.24.020.
• Conditional uses: Restaurants, service stations, public utilities, outdoor storage (if screened), public/semi‑public facilities, convalescent care, day care, etc. See § 17.24.030.
• Development & review: Site & architectural approval required for C‑3 and C‑3‑I (§ 17.24.070); manufacturing processes limited to gas/electric or city‑approved fuel sources (§ 17.24.060).

C‑H (Highway Commercial) — § 17.26

• Purpose: Commercial uses serving highway traffic (Highway 12 corridor), e.g., hotels, restaurants, groceries, gas, building supply. See § 17.26.010–.020.

M‑G (General Manufacturing) — § 17.30

• Purpose: Heavier industrial uses, research, manufacturing and services that may require truck access and outdoor storage. See § 17.30.010–.020.
• Typical permitted uses: Research & development, laboratories, light manufacturing of non‑odorous goods, services/suppliers to natural gas industry, warehouses, certain contractor yards—many heavy uses allowed but some uses are conditional/limited. See § 17.30.020–.030.
• Key dimensional rules: Minimum lot area typically 0.5 acre except where specified; no maximum building coverage (except for access, parking, drainage, landscaping and setbacks); no blanket maximum building height but subject to airport obstruction and fire department review (§ 17.30.050–.070).

I‑P‑I (Industrial Park / Industrial) — § 17.28

• Purpose: Modern, non‑nuisance industrial, research labs and large office uses compatible with industrial parks. See § 17.28.010–.020.
• Typical permitted uses: Administrative/professional offices, research & development labs, limited manufacturing (non‑odorous), printing, equipment rental, public/semi‑public facilities. See § 17.28.020.

B‑P (Business Park) — § 17.29

• Purpose: Business park on the former Rio Vista Airport site: modern non‑nuisance industrial, research, large office and business services with locational criteria. See § 17.29.010.
• Uses & frontage rules: Permitted and conditional uses vary by whether a lot fronts on an arterial/collector corridor (Airport Road, Poppy House Road, St. Francis Road, etc.) versus interior/local streets. The code uses a tabular "P / C / —" matrix with a frontage footnote to determine whether uses are Permitted (P) or Conditional (C). See § 17.29.020.
• Key numeric standards (development standards table): Minimum lot area 40,000 sq ft, minimum lot width 100 ft, minimum front yard 25 ft, minimum side yards 10–15 ft, minimum rear yard 20 ft, maximum building height 50 ft, minimum landscaped site area 10%, minimum yard adjoining a residential district 30 ft (table in § 17.29.050). See § 17.29.050 for the full frontage‑sensitive table and development standards.

Army Base District — § 17.27

• Purpose: Implements the Army Base District Design Guidelines for the former Army Base / waterfront redevelopment. See § 17.27.020–.040.
• Typical permitted uses: Parks, fishing facilities, interpretive centers, trails, open space, promenades (permitted). Conditional uses include research stations, Delta science facilities, docks and boat storage, warehouses for research, small commercial supporting uses; conditional uses require § 17.66.070 findings and must conform to the Army Base District Design Guidelines. See § 17.27.030–.040.
• Site & design: Site and architectural approval (Chapter 17.60) and the Army Base Design Guidelines are mandatory; a PUD or specific plan is encouraged/expected for phased development. See § 17.27.050–.060.

D‑W (Downtown Waterfront / Waterfront Specific Plan area) — § 17.42

• Purpose: Implements the Waterfront Specific Plan; permitted uses and development standards are set out in the Specific Plan's regulating code (Section 2 of that plan). See § 17.42.010–.060.
• Parking & review: Off‑street parking for new construction may be provided on‑site or by a fee‑in‑lieu agreement per the Specific Plan (§ 17.42.070). Site, architectural and sign review per Chapter 17.60 and the Specific Plan rules apply.

P‑L (Park Land), D‑R (Drill Reservation), O‑A‑R (Open Agricultural/Riverfront), other special districts — §§ 17.38, 17.40, 17.36

• These chapters set tailored permitted and conditional uses (open space, trails, agricultural/reservation drilling, riverfront uses). See § 17.38.020–.030, § 17.40.020–.030, and § 17.36.020–.050 for permitted uses and the conditions that apply.

Quick reference table — common, decision‑relevant uses and code references

Checklist — what an applicant must satisfy for a new or changed land use

• Confirm the zoning district for the parcel (zoning map) and the applicable district chapter in Title 17; locate the district’s permitted and conditional uses (e.g., § 17.08.020 for R‑1).
• If the use is listed as conditional, prepare a use permit application and findings evidence per § 17.66.070 (site plan, parking, noise/traffic analysis, soil/geologic suitability).
• Meet the district’s dimensional standards (lot area, yards, height, lot coverage) as listed in the district chapter and the zoning schedule § 17.06.010.
• Provide required off‑street parking per the parking schedule and account for any special rules in C‑2/D‑W/B‑P (§ 17.48.010 and district references). See the city’s parking page for guidance.
• If required by the district, obtain site & architectural approval under Chapter 17.60 and conform with design guidelines (e.g., Army Base, Waterfront Specific Plan). See the city's design review page.
• Comply with landscaping/screening requirements (Chapter 17.44); see landscaping and screening.
• If proposing an ADU, follow the rules in the municipal ADU chapter and state ADU law; see the Rio Vista ADU page and California ADU law. Not all ADU technical standards (e.g., plumbing/electrical) are in Title 17 — the California Building Standards Code also applies.

Risks & Ambiguities

Plain‑English summary

Rio Vista spells out allowed and conditional land uses zone‑by‑zone in Title 17. Residential zones (R‑1, R‑2, R‑3/R‑4) generally allow housing and accessory units, commercial zones (C‑1, C‑2, C‑3) allow neighborhood to regional retail/service uses with varying limits, and industrial/business park zones (M‑G, I‑P‑I, B‑P) allow research, light manufacturing and business uses with frontage‑sensitive rules. Conditional uses require a use permit with public notice and findings under § 17.66.070; many projects also need site and architectural approval (Chapter 17.60). Always check the district chapter for the precise permitted/conditional list and the district’s dimensional table before assuming a use is allowed.

Information Gaps

• The captured ordinance excerpts include image‑based tables (parking schedule, some zoning schedule tables, B‑P use matrix). The OCR/text extract omitted portions of those images. Exact numeric values for some parking and zoning schedule rows are therefore incomplete in the retrieved materials. Verify numeric table entries directly in the official Title 17 code or with city planning staff. Not found in retrieved materials: full numeric detail for every parking/use matrix row where the original is an image.
• Where Title 17 defers to the Waterfront Specific Plan or Army Base District Design Guidelines, the full list of regulating code details and design standards are in those separate documents (not fully reproduced here). Verify plan‑level standards in the Specific Plan/design guidelines.

Source References

• Rio Vista Municipal Code, Title 17 — Zoning (downloaded from ecode360): General Title 17 table of contents and district chapters; key chapters cited below.
• R‑1 uses: § 17.08.020 (R‑1 permitted uses)
• R‑2 uses: § 17.12.020 (R‑2 permitted uses)
• R‑3 uses & parking/height: § 17.14.020; § 17.14.040–.050 (parking & height)
• R‑4: § 17.16.010–.040 (R‑4 definitions and conditional use rules)
• C‑1: § 17.18.010–.060 (Neighborhood Commercial uses and standards)
• C‑2: § 17.20.010–.040 (Community Commercial uses and conditional uses)
• C‑3 / C‑3‑I: § 17.24.010–.070 (General & service commercial / light industrial rules)
• M‑G: § 17.30.010–.080 (General manufacturing permitted & conditional uses, development standards)
• B‑P Business Park: § 17.29.010–.060 (uses by frontage, development standards table)
• Army Base District: § 17.27.020–.060 (permitted/conditional uses, Army Base Design Guidelines requirement)
• Waterfront Specific Plan / D‑W district: § 17.42.010–.070 (regulating code in the Specific Plan; parking fee‑in‑lieu)
• Use permit process & findings: § 17.66.070 (use permits: application, findings, conditions)
• Zoning Schedule: § 17.06.010 (summarized zoning schedule — yard/area/height tables)
• Parking schedule and off‑street parking standards: Chapter 17.48 (parking schedule excerpts located in the code tables) — see the parking schedule images in the municipal code extracts.

Retrieved passages

• Rio Vista Zoning Code (§ 17.16.130) High relevance show source text
• Rio Vista Zoning Code (§ 410) High relevance show source text
• Rio Vista Zoning Code (§ 1) High relevance show source text
• Rio Vista Zoning Code (Section 17.66.070) High relevance show source text
• Rio Vista Zoning Code (§ 17.27.020.) High relevance show source text
• Rio Vista Zoning Code (§ 17.48.010) High relevance show source text
• Rio Vista Zoning Code (§ 17.29.020) High relevance show source text
• Rio Vista Zoning Code (Section 17.44.180) High relevance show source text
• Rio Vista Zoning Code (§ 408) High relevance show source text
• Rio Vista Zoning Code (§ 411) High relevance show source text
• Rio Vista Zoning Code (Section 17.18.010) High relevance show source text
• Rio Vista Zoning Code (§ 17.30.030) High relevance show source text
• Rio Vista Zoning Code (CHAPTER 17.14) High relevance show source text
• Rio Vista Zoning Code (§ 17.14.030.) High relevance show source text

Cited sections

• Rio Vista Municipal Code, Title 17 — Zoning (downloaded from ecode360): General Title 17 table of contents and district chapters; key chapters cited below. (Title 17)
• **R‑1 uses:** **§ 17.08.020** (R‑1 permitted uses) (§ 17.08.020)
• **R‑2 uses:** **§ 17.12.020** (R‑2 permitted uses) (§ 17.12.020)
• **R‑3 uses & parking/height:** **§ 17.14.020**; **§ 17.14.040–.050** (parking & height) (§ 17.14.020)
• **R‑4:** **§ 17.16.010–.040** (R‑4 definitions and conditional use rules) (§ 17.16.010)
• **C‑1:** **§ 17.18.010–.060** (Neighborhood Commercial uses and standards) (§ 17.18.010)
• **C‑2:** **§ 17.20.010–.040** (Community Commercial uses and conditional uses) (§ 17.20.010)
• **C‑3 / C‑3‑I:** **§ 17.24.010–.070** (General & service commercial / light industrial rules) (§ 17.24.010)
• **M‑G:** **§ 17.30.010–.080** (General manufacturing permitted & conditional uses, development standards) (§ 17.30.010)
• **B‑P Business Park:** **§ 17.29.010–.060** (uses by frontage, development standards table) (§ 17.29.010)
• **Army Base District:** **§ 17.27.020–.060** (permitted/conditional uses, Army Base Design Guidelines requirement) (§ 17.27.020)
• **Waterfront Specific Plan / D‑W district:** **§ 17.42.010–.070** (regulating code in the Specific Plan; parking fee‑in‑lieu) (§ 17.42.010)
• **Use permit process & findings:** **§ 17.66.070** (use permits: application, findings, conditions) (§ 17.66.070)
• **Zoning Schedule:** **§ 17.06.010** (summarized zoning schedule — yard/area/height tables) (§ 17.06.010)
• **Parking schedule and off‑street parking standards:** Chapter 17.48 (parking schedule excerpts located in the code tables) — see the parking schedule images in the municipal code extracts. (Chapter 17.48)
• RioVista_ZoningCode.md

• Official Rio Vista code library