Commercial Real Estate in Napa County: Zoning, Districts and Taxes

By Matthew Martinez, Founder, CEO & Managing Broker, Diamond Real Estate Group. California DRE #01869679.

Commercial real estate in Napa County is concentrated in a few places: downtown Napa and the city’s commercial corridors, the industrial and business-park land around the county airport and American Canyon, and the small downtowns of Yountville, St. Helena and Calistoga. Most of the rest of the county is agricultural land, where commercial activity is largely limited to wineries and other uses the county permits case by case. So the first job on any Napa commercial deal is to confirm which jurisdiction controls the parcel and what its zoning actually allows.

This guide is for business owners, investors and wine-industry buyers looking at Napa County property to buy or lease. It covers the five cities and the unincorporated county, the industrial area in the south county, the town-level limits on chain businesses, winery-related property, and the transfer and lodging taxes. For the broader process of buying, leasing and investing, start with our commercial real estate hub.

Five cities, one county: who controls the parcel

Napa County has five incorporated cities and towns: American Canyon, Napa, Yountville, St. Helena and Calistoga. Each writes its own zoning code and runs its own planning counter. Land outside those limits falls under Napa County Planning, Building & Environmental Services (PBES) and Title 18 of the County Code.

A Napa mailing address can sit in the unincorporated county, and the airport industrial area is split between county land and land now inside American Canyon. Look up the parcel, then confirm the zoning and the permit history with the agency that controls it. Our Napa County guide describes the towns and the unincorporated areas in more detail.

Area	Who regulates it	Typical commercial property
City of Napa	City of Napa (Title 17 zoning)	Downtown retail, restaurants and offices; hotels; neighborhood and community shopping centers
Airport industrial area	Napa County, and the City of American Canyon for annexed parcels	Warehouses, wine storage, production and business-park buildings
American Canyon	City of American Canyon	Retail and service buildings, plus industrial land near the airport
Yountville, St. Helena, Calistoga	Each town or city	Small downtown retail, restaurants, tasting rooms and lodging
Unincorporated county	Napa County PBES (Title 18)	Wineries under use permits, a few commercial and industrial districts, airport uses

Unincorporated Napa County zoning for commercial and industrial use

The county’s zoning title has only a handful of commercial and industrial districts, which tells you how little land outside the cities is zoned for business. Based on a reproduction of the code with text as of October 4, 2026, they are:

Commercial: CL Commercial Limited (Chapter 18.28), CN Commercial Neighborhood (18.32) and MC Marine Commercial (18.34).
Industrial: I Industrial (18.36), IP Industrial Park (18.40) and GI General Industrial (18.44).
Airport: AV Airport (18.24), plus the AC Airport Compatibility combining district (18.80), which overlays other zones near the airport.
Napa Pipe: the NP district (18.66), with mixed-use residential waterfront and industrial/business-park subareas.

Two other combining districts are worth knowing on rural commercial deals: HR Historic Restaurant (18.103) and PS Agricultural Produce Stand (18.102). Most of the county’s land is zoned AP Agricultural Preserve or AW Agricultural Watershed, where agriculture is the priority use. Our guide to AP and AW zoning explains those limits, and why a building on ag land can’t simply be converted to a general commercial use.

Downtown Napa and the city’s commercial districts

The City of Napa is the county’s largest commercial market. Chapter 17.10 of its municipal code sets out seven commercial districts:

District	Intended for
CL Local Commercial	Small-scale retail, services and restaurants serving nearby neighborhoods
CC Community Commercial	A broad range of community-serving retail, services, entertainment and offices
CT Tourist Commercial	Hotels, visitor-serving retail, entertainment and wine-related uses
DCC Downtown Core Commercial	The pedestrian-oriented downtown shopping core and its historic character
DMU Downtown Mixed Use	A less intensive mix of retail, office, institutional and residential uses around the core
DN Downtown Neighborhood	The transition to surrounding residential areas, with housing, limited services, offices and live/work
OBC Oxbow Commercial	Hotels, recreation, visitor-serving retail and dining, and live/work in eastern downtown

The district purpose is only a starting point. The chapter’s use tables decide whether a given business is permitted, needs a use permit or isn’t allowed, and downtown parcels also follow the city’s downtown specific plan and design review. Our page on mixed-use buildings covers the downtown rules on ground-floor and upper-floor uses, and our City of Napa guide describes downtown and the Oxbow district.

The airport industrial area and American Canyon

South of the City of Napa, the land around Napa County Airport holds most of the county’s warehouse and industrial space. Napa County’s policy documents page posts the Napa Valley Business Park Specific Plan, described as guiding development of the “designated 2,945-acre Napa County Airport Industrial area,” under a heading for archival reference. State CEQA filings for projects in the area cite an Airport Industrial Area Specific Plan instead.

We have not confirmed with the county whether those names refer to the same plan, or which version is in force as of October 2026. Ask PBES, or American Canyon for parcels in the city, which plan and development standards apply before you rely on them.

Part of the area is now inside American Canyon. A 2014 state CEQA filing for Napa Logistics Park Phase II, with the City of American Canyon as lead agency, described about 176 vacant acres near Devlin Road and South Kelly Road zoned SP-2, Napa County Airport Industrial Area Specific Plan. The proposal was for up to 2,270,640 square feet of warehouse, distribution, e-commerce and accessory space. That was a proposal at the time, not a description of what was built.

For a buyer or tenant, the practical point is that two neighboring buildings can answer to different agencies. Our guide to industrial and warehouse space covers clear height, loading, power and the bonded-winery questions that come up here, and our American Canyon guide describes the city.

Yountville, St. Helena and Calistoga: small downtowns, local limits

The up-valley towns have small commercial districts and their own rules about chain businesses. Check them before you sign a lease or price a building on the assumption that any tenant can move in.

St. Helena

St. Helena regulates “formula businesses” in section 17.22.120 of its municipal code. Where the zoning table requires a conditional use permit, the planning commission must find, among other things, that the business is consistent with the town’s historic character and, in the CB district, supports the downtown core. The section states: “No formula restaurants are allowed.” The posted code was current through an ordinance passed July 22, 2026. Our St. Helena guide covers the town more broadly.

Yountville

Yountville’s Primary Commercial district is meant to reinforce Washington Street as the town’s main commercial street. Its standards cap floor area ratio at 0.25, with a bonus of up to 0.15 for certain uses, and require a use permit and design review for restaurants. We found no formula-business rule in that chapter (code text as of October 4, 2026), and an undated North Bay Business Journal report said the town relies on design standards rather than a chain ban. See our Yountville guide.

Calistoga

Calistoga’s posted zoning code, checked in October 2026, lists formula restaurants and formula visitor accommodations as prohibited uses in its DC Downtown Commercial district (Chapter 17.21). Other formula businesses that the district otherwise allows need a use permit there.

An undated North Bay Business Journal article traced the city’s no-formula policy to 1996. We did not read the code’s definition of a formula business or the rules for Calistoga’s other districts, so ask the city’s planning department whether a particular operator counts before you sign or price a lease.

Winery and tasting room property

Much of Napa County’s commercial real estate value sits in wineries, which are permitted uses on agricultural land rather than ordinary commercial buildings. Napa County adopted its Winery Definition Ordinance, No. 947, on January 23, 1990, and a winery’s use permit sets its production, visitation, marketing events and hours. Those permit terms often matter more to value than the building.

Tasting rooms inside the cities follow city zoning instead, such as the wine-related uses contemplated in Napa’s Tourist Commercial district. Our guides cover the Napa County winery use permit process and leasing tasting room space. For whole wineries, vineyards and estates, see our vineyard and winery services.

Transfer tax, lodging tax and property tax

Napa County’s documentary transfer tax is $0.55 per $500 of value, or $1.10 per $1,000. Inside a city, the city receives half of the county’s collection. We found no separate city transfer tax in any of the five. The county computes the tax on value less any liens the buyer assumes, while new loans count toward value, and it lists legal entity changes of control and leases over 35 years among the covered transfers.

The county says the seller customarily pays in Northern California. That matches custom in Diamond’s North Bay markets, but it’s negotiable and local custom varies, so state it in the purchase agreement. Our transfer tax guide explains how the tax works statewide.

Lodging location	Room tax (as posted, October 2026)	Added assessment or tax	Source
Unincorporated Napa County	13%	2% tourism assessment	Napa County TOT page (no date shown)
City of Napa	12%	1% affordable and workforce housing tax, plus 2% tourism improvement district assessment	City remittance form effective June 16, 2025
Other cities	Set by each city	Ask the city’s finance department

Lodging operators in the unincorporated county register each facility with the tax administrator every year and file returns by calendar quarter. For any hotel or inn purchase, ask for the property’s TOT filings; they are also a quick check on reported revenue.

On property tax, a purchase is generally a change in ownership under Proposition 13, so budget for reassessment to the price you pay, not the seller’s current bill.

Due diligence that matters in Napa County

Get the use confirmed in writing. Ask the city or PBES whether your use is allowed and whether the current use is permitted, especially on older rural buildings.
Read the winery or use permit. On a winery or other permitted use, pull the permit and any modifications, and compare actual operations with what the permit allows.
Check the airport overlay. Near the airport, the AC combining district and airport land use compatibility policies can limit uses, height and occupancy.
Plan for water and wastewater. Rural commercial sites often rely on wells and septic or process-wastewater systems, which cap occupancy and expansion; the county regulates both through its environmental health programs.
Review accessibility and hazards. Check the CASp status, flood maps along the Napa River and fire hazard zones at the wildland edge.

Our commercial due diligence checklist covers title, survey, environmental and lease review step by step. Diamond may refer you to partners we work with; you’re free to choose any provider.

Questions people ask

Does the City of Napa have its own transfer tax?

We found none. A sale pays the county’s $1.10 per $1,000 of value, and the city receives half of what is collected inside its limits.

Where is industrial space in Napa County?

Mostly in the airport industrial area south of the City of Napa, part of which is unincorporated county land and part inside American Canyon. The county also has I, IP and GI industrial districts and the Napa Pipe district.

Can I open a chain store or restaurant in St. Helena?

Not a chain restaurant: St. Helena’s code says no formula restaurants are allowed. Other formula businesses follow the zoning table and, where a conditional use permit is required, findings about the town’s character and downtown.

Can I convert a building on agricultural land to a commercial use?

Usually not as a general commercial use. Most rural land is zoned AP or AW, where agriculture comes first and wineries and similar uses need county permits. Confirm with Napa County PBES before you make an offer that depends on a new use.

What is the hotel tax in Napa?

As of October 2026, the City of Napa’s remittance form, effective June 16, 2025, shows a 12% transient occupancy tax, a 1% housing tax and a 2% tourism assessment. The county’s page lists 13% plus a 2% tourism assessment in the unincorporated area.

Will my property taxes change when I buy a commercial building?

Usually yes. A purchase is generally a change in ownership under Proposition 13, so the assessor reassesses the property to its value at the time of sale.

Does Diamond handle commercial leasing in Napa County?

Yes. Diamond handles commercial sales and leasing in Napa County, along with vineyard and winery properties.

If you are looking for space or weighing a commercial purchase or sale in Napa County, tell us the use, size and timing you have in mind. Contact us and we’ll start with the zoning and permit questions for the specific property.

This page is general information, not legal or tax advice. Use permits, airport overlays and transfer tax terms can change what a Napa property is worth to you, so have a California real estate attorney and a tax adviser review the lease or purchase agreement before you commit.

Sources & notes

Note: Calistoga’s formula-business rules are taken from its DC district chapter; the 1996 origin is as reported by the North Bay Business Journal. Lodging tax rates for American Canyon, Yountville, St. Helena and Calistoga are not listed here; confirm them with each city.

Last reviewed October 2026 by Matthew Martinez.