Local zoning · Napa County

Napa County — Parking

Parking under the Napa County local zoning and planning code, with the controlling citations.

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Last reviewed: July 6, 2026

Overview

This page distills how off-street parking, loading, and bicycle parking work in the unincorporated areas of Napa County under the County’s zoning ordinance. The core rules live in Title 18 Zoning, with countywide standards for design and counts, and several zoning districts layering on their own parking ratios or siting rules. If you’re new to Napa County regulations, start with the Napa County zoning & planning overview, then use this page to zero in on parking.

Key rule in plain English: the countywide parking chapter does not apply to agricultural and winery uses, and where a zoning district’s parking rules conflict with countywide standards, the district’s rules control (§ 18.110.010) .

Countywide framework (applies unless a district says otherwise)

  • Purpose and scope. The off-street parking chapter exists to reduce congestion and improve safety. It specifically notes that its standards do not apply to agricultural and winery uses, and that a district’s specific parking standards govern if there’s any conflict (§ 18.110.010) .
  • Baseline residential rule. In any zoning district, provide 2 off‑street spaces per dwelling unit, unless a lower standard is allowed elsewhere in County Code or state law (e.g., emergency shelters, residential care, ADUs, two‑unit developments) (§ 18.104.130(B)) .
  • ADUs. Accessory dwelling units generally require 1 space per ADU, with studios requiring none; tandem and setback parking are allowed, and multiple categorical exemptions eliminate any ADU parking entirely (e.g., within 0.5 miles of transit) (§ 18.104.180(B)(3)) . See our ADU page for state-layered rules: California ADU law.
  • Bicycle parking (nonresidential). Provide bike parking proportional to automobile spaces: 0 (0–4 auto spaces), 2 (5–10), or 10 (10+). If 20+ auto spaces are required, at least half of required bike spaces must be covered. Each bike space is 6 ft x 2 ft and needs a secure rack; place bike parking near entries when feasible (§ 18.110.040(B)) .
  • Compact spaces. Up to 35% of required parking may be designed for compact/small cars, per County Road and Street Standards (§ 18.110.040(C)) .
  • Shared/cooperative and TDM reductions. The County may: (a) set a maximum parking cap; (b) allow cooperative/shared parking with a use permit; and (c) approve up to a 10% reduction for non‑auto programs (e.g., shuttles, bus passes, carpools) (§ 18.110.040(A), (E)–(G)) .
  • Location, design, and surfacing. Required spaces may not intrude into required front yards, landscape setbacks, or exterior side yards; driveways should be separated by 125 ft minimum on collectors/minor streets (or as DPW requires); connect adjacent lots where possible; minimize curb cuts; mark and maintain spaces; and meet the County Road and Street Standards for dimensions (§ 18.110.050(A)–(B)) . Parking areas must also incorporate landscaping, including 10 sq ft of landscape per space, plus perimeter trees and pedestrian crosswalks in lots with 20+ spaces (§ 18.110.050(A)(6)–(10)) . For overall design coordination, see Napa County Design Review.
  • Lighting. Any parking lot lighting must prevent glare off site and may be required by the County for safety (§ 18.110.050(C)) .
  • Loading. Off-street loading must be screened; not placed in any front yard or facing a state highway; and designed to 12 ft x 40 ft with 14 ft vertical clearance. Pave loading areas; provide 1 space for the first 10,000 sq ft of floor area plus 1 per 40,000 sq ft above that for storage/warehousing/manufacturing/processing/research; all-office buildings are exempt (§ 18.110.060) .
  • Improvement standards. Parking and loading improvements must meet approved plans and the County Road and Street Standards (§ 18.110.070) .
  • Temporary off-site event parking. Allowed subject to extensive objective standards (e.g., fire lanes 14 ft, security, site limits, dust suppression, setbacks from residences), and limited duration (§ 18.104.130(D)) , .

For broader context on use permissions that drive parking needs, see Napa County Zoning and Napa County Land Use. For streetscape setbacks affecting parking placement, also see Napa County Development Standards and Napa County Overlay Districts.

Selected parking ratios by district or plan area

Some districts set their own counts that supersede countywide baselines. Below are the unincorporated-area districts that include explicit parking articles.

CN — Neighborhood Commercial

  • Purpose/where it applies: Not found in retrieved materials.
  • Parking standards. Provide at least 1 space per 500 sq ft of building floor area, plus 1 space per employee (§ 18.32.070(A)) .
  • Siting and design. Keep parking out of required setback areas; landscape lots at a minimum of 1 tree/6 spaces (double-loaded) or 1 tree/3 spaces (single-loaded); connect adjacent commercial lots where possible (§ 18.32.070(B)–(C)) .

MC — Marine Commercial

  • Purpose/where it applies. Intended to improve public waterfront access and uses; applies only to parcels fronting the west bank of the Napa River south of the city, and certain Lake Berryessa shoreline areas (§ 18.34.010) .
  • Parking siting and design. No parking in required setback areas; landscape at 1 tree/6 spaces (double-loaded) or 1 tree/3 spaces (single-loaded); connect adjacent MC lots where possible; lighting must not be visible from streets or adjoining properties (§ 18.34.080(A)–(C)) .

I — Industrial

  • Purpose/uses. Industrial environment for administrative facilities, research institutions, and specialized manufacturing; agriculture is also allowed by right (§ 18.36.010, § 18.36.020) .
  • Parking ratio. Provide 1 space per employee, plus “2 sq ft of parking area for each sq ft of general office/retail sales area” (§ 18.36.050) . Verify dimensional layout via County Road and Street Standards (§ 18.110.050(B)) .

GI — General Industrial

  • Core parking rules. On-street parking is not permitted on public streets; all required parking/loading must be on-site. Minimum counts: warehousing 1/1,000 sq ft (first 20,000) then 1/2,000; office 1/250 sq ft; manufacturing/processing/packaging/research/service 1/500 sq ft; plus 1 space for each company vehicle (§ 18.44.080(A), (I)(1)–(4)) . Fractional rounding at 1/2+ = 1 space (§ 18.44.080(B)) .
  • Design references. Dust‑free, all‑weather surfacing; permanent maintenance; dimensions per County Road and Street Standards; lighting must be directed on-site (§ 18.44.080(C)–(H)) .
  • Loading in GI. ≥10,000 sq ft buildings: 1 loading space, plus 1 per 40,000 sq ft; size 12' x 40' x 14' clearance; office-only buildings are exempt (§ 18.44.090) .
  • Edge conditions. Extra landscape setbacks when abutting or across from IP; and landscaping ratios for lots, including 1 tree/6 spaces (double-loaded) and 1 tree/3 spaces (single-loaded) (§ 18.44.060(B), § 18.44.110(D), (E)) , .

NP — Napa Pipe plan districts (MUR, IBP‑W, IBP)

  • Framework. Parking counts occur either by Table or by an approved development plan (§ 18.66.280(A)) ; design review and plan-level standards coordinate siting and signage (§ 18.66.310) .
  • Representative ratios (Table 18.66.280). Residential: studios 1.25/unit; 1‑BR 1.5/unit; 2‑BR 2.0/unit; 3‑BR 2.0/unit; senior housing 1.0/unit including employees; guest parking 1 per 4 units. Commercial‑retail 1/250 sq ft; restaurants 1/120 sq ft; hotel 1/room; light industrial: warehousing 1/1,000 sq ft (first 20,000) then 1/2,000; office 1/250 sq ft; manufacturing 1/500 sq ft; wholesale 1/200 sq ft (§ 18.66.280, Table 18.66.280) .
  • Bicycle and loading. NP districts apply countywide bicycle standards (§ 18.66.290, referencing § 18.110.040) and countywide loading standards (§ 18.66.300, referencing §§ 18.110.040–.060) .

PL — Public Lands

  • Parking siting and surfacing (development standards). Required parking/loading must be on the same site as the use; surfacing must be dust‑free and all‑weather; the commission may set other requirements where uses are mixed or indeterminate (Chapter 18.50, development standards—parking/loading; specific § number not shown in retrieved extract) .

Decision-focused standards at a glance

Topic Standard Code Reference
Countywide residential baseline 2 off-street spaces per dwelling unit (unless a lower standard applies) § 18.104.130(B)
ADU parking 1 space per ADU; studios none; tandem/setback allowed; several categorical no‑parking cases § 18.104.180(B)(3)
Bicycle parking (nonresidential) 0 bike spaces (0–4 auto), 2 (5–10 auto), 10 (10+ auto); half covered if 20+ auto required § 18.110.040(B)
Compact spaces Up to 35% of required spaces may be compact § 18.110.040(C)
Not in setbacks No required spaces in required front yard, landscape setbacks, or required exterior side yards § 18.110.050(A)(1)
Landscaping within lots 10 sq ft landscaped area per space; perimeter trees; crosswalks for lots with 20+ spaces § 18.110.050(A)(6)–(10)
Loading (countywide) 12' x 40' x 14' clearance; 1 per first 10k sq ft + 1/40k sq ft; none for all‑office § 18.110.060
CN ratio 1/500 sq ft + 1/employee; no parking in required setbacks § 18.32.070(A)–(B)
MC siting Landscape ratios; connect lots; no parking in required setbacks § 18.34.080(A)–(C)
I (Industrial) 1/employee + 2 sq ft parking area per 1 sq ft of office/retail sales area § 18.36.050
GI ratios Warehouse 1/1,000 (first 20k) then 1/2,000; Office 1/250; Mfg/R&D 1/500; +1 per company vehicle § 18.44.080(I)
NP table examples Residential, retail, restaurant, hotel, industrial ratios by use § 18.66.280 (Table 18.66.280)

Checklist

  • Confirm whether your site is in the unincorporated area and identify its base district and any overlays (Zoning, Overlay Districts).
  • Determine whether district‑specific parking rules supersede countywide standards (e.g., GI, CN, MC, NP) (§ 18.110.010) .
  • Calculate off‑street parking, guest parking, and loading counts using the applicable table or district rules (e.g., GI § 18.44.080; NP § 18.66.280) , .
  • Apply bicycle parking and compact space allowances as eligible (§ 18.110.040(B)–(C)) .
  • Lay out parking outside required setbacks, meet driveway spacing, and connect to adjacent lots where feasible (§ 18.110.050(A)) .
  • Meet surfacing, drainage, lighting, and dimensional standards per the County Road and Street Standards (§ 18.110.050(B), § 18.110.070) , .
  • Design landscaping within lots (e.g., 10 sq ft/space; perimeter trees) and required screening (§ 18.110.050(A)(6)–(10); GI § 18.44.110(D)) , .
  • If pursuing shared/cooperative parking or TDM reductions, prepare the use‑permit submittals and agreements (§ 18.110.040(E)–(G); § 18.124.060(B)) , .
  • For events using temporary off‑site parking, build an “off‑site parking plan” that meets § 18.104.130(D) requirements (e.g., 14 ft fire lanes) .

Risks & Ambiguities

Issue Why it matters What to verify
District vs. countywide conflicts Districts like GI, CN, MC, and NP override general counts Which code section controls for your zoning; § 18.110.010 notes district rules prevail
Multi-family parking specifics outside NP Counts are referenced but the explicit multi-family schedule location wasn’t retrieved Whether your project falls under a specific district or countywide schedule; “Not found in retrieved materials” for the exact §; confirm with Planning
Surfacing/dimensions Layout and stall sizing come from the County Road and Street Standards Current edition acceptance by DPW per § 18.110.070; any project-specific adjustments
Shared parking across parcels Requires permits/agreements; lapses end the allowance Use permit conditions and recorded agreements per § 18.110.040(F)
Agricultural/winery uses Chapter 18.110 does not apply Which chapter or permit governs your ag/winery use parking (§ 18.110.010)
Industrial “I” district metric I‑district uses an older “sq ft of parking area” formula How DPW interprets this with current dimensional standards; confirm under § 18.36.050 and § 18.110.050(B) ,

Plain-English Summary

If you’re building or changing a use in unincorporated Napa County, start with your zoning district. Many projects follow countywide rules for how many spaces you need, where you can put them, how they’re landscaped, and what loading/bicycle facilities look like. But several districts—especially the industrial and plan-area districts—set their own parking ratios and siting standards that override the general rules. When in doubt, check your district chapter first, then layer on the countywide design and bicycle/loading standards, and use Napa County Design Review to coordinate lighting, landscaping, and screening.

Source References

  • Title 18 Zoning — Chapter 18.110 Off‑Street Parking and Loading: purpose/applicability; bicycle parking; compact spaces; shared/cooperative/TDM reductions; siting/design; landscaping; lighting; loading; improvement standards (§§ 18.110.010, 18.110.040–.070)
  • Residential baseline and temporary off‑site event parking (§ 18.104.130)
  • ADU parking standards (§ 18.104.180(B)(3))
  • CN Neighborhood Commercial parking (§ 18.32.070)
  • MC Marine Commercial intent and parking (§§ 18.34.010, 18.34.080)
  • I Industrial intent/uses and parking (§§ 18.36.010, 18.36.020, 18.36.050)
  • GI General Industrial parking and loading (§§ 18.44.080–.090; related landscaping)
  • NP districts (MUR, IBP‑W, IBP) parking table, bicycle, loading, signage (§§ 18.66.280–.310)
  • PL Public Lands development standards—parking/loading (chapter extract; specific § not shown) (Chapter 18.50, development standards for parking/loading)
  • For broader permitting and standards context: Napa County Development Standards, Napa County Design Review, Napa County Overlay Districts, California Building Standards Code, California housing laws.

Information Gaps

  • The specific section citation for the countywide multi-family parking schedule under Chapter 18.110 was not found in the retrieved materials; confirm with the jurisdiction.
  • The precise section number for PL district “development standards—parking/loading” was not shown in the extract; confirm with the jurisdiction.

Sources

Retrieved passages

  • Napa County Zoning Code (§ 2) High relevance
  • Napa County Zoning Code (Chapter 18.110.) High relevance
  • Napa County Zoning Code (Chapter 18.08) High relevance
  • Napa County Zoning Code (§ 36) High relevance
  • Napa County Zoning Code (§ 8) Medium relevance
  • Napa County Zoning Code (Section 12279.7) Medium relevance
  • Napa County Zoning Code (§ 5) Medium relevance
  • Napa County Zoning Code (§ 13) Medium relevance
  • Napa County Zoning Code (§ 2) High relevance
  • Napa County Zoning Code (§ 2) Medium relevance
  • Napa County Zoning Code (§ 1) Medium relevance
  • Napa County Zoning Code (§ 2) Medium relevance

Cited sections

Frequently asked questions

Do countywide parking rules apply to wineries or agricultural uses in unincorporated Napa County?

Not under Chapter 18.110. The county’s off-street parking chapter expressly “does not apply to agricultural and winery uses,” so those uses rely on other applicable chapters/permits (§ 18.110.010). Always check your project’s underlying entitlements first .

How many parking spaces do I need for a small office or warehouse in the GI district?

In the GI district, office uses require 1 space per 250 sq ft, and warehouse space requires 1/1,000 sq ft for the first 20,000 sq ft, then 1/2,000 sq ft above that. Manufacturing/research is 1/500 sq ft. Add 1 space for each company vehicle (§ 18.44.080(I)) .

What are Napa County’s basic residential parking rules for single-family homes and ADUs?

Countywide, the baseline is 2 off‑street spaces per dwelling unit (§ 18.104.130(B)) . Most ADUs need 1 space (studios need none), with multiple exemptions where no ADU parking is required (e.g., within ½ mile of transit). Tandem and setback parking are allowed for ADUs (§ 18.104.180(B)(3)) .

Do I need bicycle parking for commercial projects?

Yes. For nonresidential uses, provide bike parking based on the required auto spaces: 2 spaces if 5–10 auto spaces are required, and 10 bike spaces if 10+ auto spaces are required. If 20+ auto spaces are required, at least half of the bike spaces must be covered (§ 18.110.040(B)) .

Can I put required parking in a front yard or landscape setback?

No. Required spaces may not be located in required front yards, landscape setbacks, or required exterior side yards. Driveway spacing and shared access rules also apply (§ 18.110.050(A)) .

Can I reduce parking by using shared parking or transportation demand management (TDM)?

Possibly. The County can approve cooperative/shared parking with a use permit and allow up to a 10% reduction for TDM programs (e.g., carpools or shuttles), subject to enforceable commitments (§ 18.110.040(E)–(G)) .

What are the loading space requirements for industrial or warehouse projects?

Countywide loading spaces must be at least 12' x 40' with 14' vertical clearance, located and screened per code. Provide 1 space for the first 10,000 sq ft, plus 1 per 40,000 sq ft thereafter (office-only buildings are exempt) (§ 18.110.060) . In GI, parallel loading rules also apply (§ 18.44.090) .

What are the parking rules for CN and MC commercial districts?

In CN, provide 1/500 sq ft plus 1/employee; keep parking out of required setbacks and landscape as specified (§ 18.32.070) . In MC, keep parking out of required setbacks, meet the tree ratios, connect adjacent lots where possible, and shield lighting (§ 18.34.080) .

How does the Napa Pipe (NP) area handle parking?

The NP districts (MUR, IBP‑W, IBP) use a table of required spaces by use (e.g., restaurants 1/120 sq ft, retail 1/250 sq ft, manufacturing 1/500 sq ft) or an approved development plan. NP also applies the county’s bicycle and loading standards (§§ 18.66.280–.300) , .

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