Napa County, CA Real Estate & Homes for Sale
By Matthew Martinez, Founder, CEO & Managing Broker, Diamond Real Estate Group. California DRE #01869679.
Napa County, California, runs from the Napa River marshes at American Canyon, near San Pablo Bay, up the Napa Valley to Calistoga, with Howell Mountain, Pope Valley and Lake Berryessa to the east; it had 132,949 residents on July 1, 2025 (Census) and five incorporated cities and towns. The California Association of REALTORS® (C.A.R.) put the county’s median sale price for existing single-family homes at $918,000 in September 2026, 2.0% above a year earlier.
Most residents live in the five cities and towns. The rest of the county is unincorporated farm and hill land, where county rules and voter-approved farmland protections decide what can be built and rented.
- County seat
- City of Napa
- Population
- 132,949 (July 1, 2025, Census estimate)
- Incorporated cities and towns
- 5: American Canyon, Calistoga, Napa, St. Helena, Yountville
- Median sale price
- $918,000 (Sept 2026, C.A.R.)
- Land area
- 748 sq mi (2020 Census)
- Transfer tax
- $1.10 per $1,000, county only
- Wine appellations
- 19 AVAs in or partly in the county
Napa County homes for sale
The listings below cover the whole county, from new subdivisions in American Canyon to vineyard estates up-valley. Narrow them by town, price, acreage or property type in our Napa County property search, and read the town guide linked in the comparison table before you book showings.
What do homes in Napa County sell for?
$918,000
September 2026, C.A.R.
+2.0%
September 2026 vs September 2025, C.A.R.
−16.0%
September 2026 vs September 2025, C.A.R.
Prices held while volume fell: the median rose from $900,000 to $918,000 over the year on 16.0% fewer sales, and August’s $947,000 shows how far one month can swing. Napa sat about 2% above California’s $899,720.
The county figure blends very different markets: in the town table below, medians run from $699,697 in American Canyon to $2,199,503 in St. Helena, and four of the nine areas have too few recent sales for a meaningful median.
| Measure | Figure | Period and source |
|---|---|---|
| Median sale price, existing single-family homes | $918,000 (August 2026: $947,000) | September 2026, C.A.R. |
| Same measure, a year earlier | $900,000 | September 2025, C.A.R. |
| Change in number of sales | −24.1% month to month; −16.0% year over year | September 2026, C.A.R. |
| Median value of owner-occupied homes | $869,500 | ACS 2020–2024, Census QuickFacts |
| Median gross rent | $2,237 a month | ACS 2020–2024, Census |
| Owner-occupied housing unit rate | 63.4% | ACS 2020–2024, Census |
| Housing units | 57,201 | July 1, 2025, Census estimate |
Napa County next to the counties around it
| County | Median sale price, September 2026 (C.A.R.) | Transfer tax on a typical city sale |
|---|---|---|
| Napa | $918,000 (+2.0% year over year) | $1.10 per $1,000 in every city and town; no city tax found |
| Sonoma | $875,000 (+10.1%) | $1.10, plus $2.00 per $1,000 more in Santa Rosa and Petaluma |
| Solano | $580,000 (−4.6%) | $1.10 in most cities; $4.40 per $1,000 in total in Vallejo |
| California | $899,720 (+1.7%) | Varies by city |
Napa County towns and areas compared
Each Napa County town guide has a row, with one dated price figure from its research. Redfin’s medians cover different months, so read them as a rough order of prices.
| Town or area | Setting | Typical property types | Price figure (period, source) | Government |
|---|---|---|---|---|
| American Canyon | South county, on the Solano County line next to Vallejo | Single-family subdivisions, including new construction at Watson Ranch | $699,697 median, ZIP 94503 (3 months to August 2026, Redfin) | City (1992) |
| Napa | South end of the valley; the county’s largest city | 19th-century homes in Napa Abajo and Fuller Park, 1950s Westwood houses, hillside homes in Alta Heights | $829,605 median (3 months to September 2026, Redfin) | City |
| Yountville | Mid-valley floor | Single-family homes, townhouses, mobile home communities | $1,444,679 median, ZIP 94599 (3 months to July 2026, Redfin; 4 sales in July) | Town (1965) |
| Oakville | Mid-valley; its valley floor lies in the Agricultural Preserve | Vineyard estates and farm parcels | Too few sales for a median (one sale on Redfin’s page, October 23, 2026) | Unincorporated |
| Rutherford | Mid-valley floor, between Oakville and St. Helena | Vineyard estates, some on the restored Napa River reach | Too few sales for a median (two listings asking $5.5M and $7.3M, Redfin, October 23, 2026) | Unincorporated |
| St. Helena | Up-valley | In-town homes near the historic downtown; vineyard estates on the edges | $2,199,503 median, ZIP 94574 (3 months to June 2026, Redfin) | City (1876) |
| Calistoga | Head of the valley | Single-family homes, mobile homes (about a quarter of units in 2016), multifamily and townhomes | $999,774 median, ZIP 94515 (3 months to June 2026, Redfin) | City (1886) |
| Angwin | Howell Mountain, eastern hills | Rural homes and acreage near Pacific Union College and its forest land | Too few recent sales; latest Redfin month was May 2025 (3 sales, $1,690,000 median, ZIP 94508) | Unincorporated |
| Pope Valley | Eastern hills beyond Howell Mountain, near Lake Berryessa | Ranches, vineyards and raw land | Too few sales for a median (one sale in the 3 months to June 2026, ZIP 94567, Redfin) | Unincorporated |
The last column matters as much as the price. In the five municipalities, city or town hall sets zoning, rental rules and the local fire map; everywhere else, Napa County Planning, Building & Environmental Services (PBES) issues permits.
What are the main regions of Napa County?
These five regions are our groupings, not official ones.
South county: American Canyon and the bay edge
American Canyon, once called Napa Junction, became a city on January 1, 1992, and had 22,773 residents in July 2025; about three-quarters of its households own their homes. Much of its new building is in the 309-acre Watson Ranch Specific Plan area, where KB Home opened Sorrel in May 2026 with two-story homes advertised from the $590,000s. More in our American Canyon guide.
The City of Napa
With 76,562 residents on 18.05 square miles, the city holds about 58% of the county’s population and names 25 neighborhoods, from mid-1800s Napa Abajo and Fuller Park to 1950s Westwood. Two city issues to check early are the Napa River flood project, under construction since 2000, and the capped vacation-rental permits. Silverado uses Napa addresses but is unincorporated. See our City of Napa homes guide.
Mid-valley floor: Yountville, Oakville and Rutherford
South of St. Helena the valley floor is mostly vineyard. Yountville, incorporated in 1965 on about 1.5 square miles, buys treated water from the California Department of Veterans Affairs, which runs the Veterans Home of California–Yountville, founded there in 1884. Oakville and Rutherford are unincorporated farm communities that share their names with federal appellations established in 1993; the Census counts 84 residents in the Rutherford census area. Along the 4.5-mile Rutherford reach of the Napa River, restored by 2014, riverfront owners pay for upkeep through a maintenance assessment district.
Up-valley: St. Helena and Calistoga
St. Helena, incorporated in 1876, has 5,194 residents, the highest median in the table and an Urban Limit Line in its 2019 General Plan; its code restricts new water connections outside the city. Calistoga, incorporated in 1886, holds residential growth to a 1.35% population growth rate, averaged over five-year cycles, through yearly allocations, sits over a geothermal resource of about 200 to 210 °F and draws about a third of its water from Kimball Reservoir.
Eastern hills: Angwin, Pope Valley and Lake Berryessa
The eastern hills rise to Howell Mountain and the inner valleys beyond. Angwin, an unincorporated community of 2,931 on 4.8 square miles (ACS 2020–2024), grew around Pacific Union College, which dates its founding to 1882; the Howell Mountain AVA takes in the mountain above the 1,400-foot contour. Pope Valley is ranch and vineyard country, with 734 residents across a 95.3-square-mile school-district area. Lake Berryessa, formed behind Reclamation’s Monticello Dam in 1957, stores 1.6 million acre-feet and has 165 miles of shoreline (Reclamation).
County-wide rules that affect a Napa County purchase
Check these rules before price, because they set what a property can be used for.
Transfer tax, property tax and loan limits
The county’s documentary transfer tax is $0.55 per $500 of value, or $1.10 per $1,000, and each city or town receives half of what is collected inside its limits (Napa County). We found no separate city transfer tax in any of the five. In Northern California the seller customarily pays, though the contract can say otherwise.
| Where the property is | Transfer tax per $1,000 | On a $918,000 sale, no loans assumed |
|---|---|---|
| American Canyon, Calistoga, Napa, St. Helena or Yountville | $1.10 (the city or town receives half) | $1,009.80 |
| Unincorporated Napa County, including Angwin, Oakville, Pope Valley and Rutherford | $1.10 | $1,009.80 |
| For comparison: Santa Rosa or Petaluma, Sonoma County | $3.10 | $2,845.80 |
| For comparison: Vallejo, Solano County | $4.40 | $4,039.20 |
Under Proposition 13 the base tax is 1% of assessed value plus voter-approved debt, assessed value rises at most 2% a year, and a sale resets it to market value (Board of Equalization). Some parcels add special taxes or assessments, such as American Canyon’s Community Facilities District No. 2018-1 or Rutherford’s river maintenance district, so read the whole tax bill in escrow. For 2026, FHFA’s one-unit conforming loan limit runs from an $832,750 baseline to a $1,249,125 ceiling in high-cost areas (FHFA); ask your lender for the Napa County figure before choosing between a conforming and a jumbo loan.
Short-term rentals and room taxes by jurisdiction
Five of the six jurisdictions ban short stays or cap them tightly.
| Jurisdiction | Rentals of about 30 days or less | Room tax on lodging |
|---|---|---|
| Unincorporated county | Generally prohibited (County Code 18.104.410); exceptions for existing bed-and-breakfast use permits and some Silverado Country Club rentals under a development agreement; no new B&B permits | 13% TOT plus a 2% tourism assessment |
| City of Napa | Permit needed for stays under 31 days; cap of 41 whole-home permits (all issued, wait list full) and 60 hosted; whole-home permits can transfer to a buyer | 12% plus 1% housing tax plus 2% assessment (15%) |
| St. Helena | Cap of 25 permits; the owner must have held the home three years; permits can’t be transferred | 13%, including 1% for housing |
| Calistoga | Banned citywide by Ordinance 778 (November 18, 2025); fines of $1,000 per violation, each day counted separately, and minimum fines of $1,500 to $5,000 | 13% plus a 2% assessment |
| Yountville | Advertising a short-term rental unit is unlawful (town code 8.08.060); every residential rental needs a town permit renewed each January | 13%, including 1% from Measure S |
| American Canyon | No short-term rental program; the zoning code lists no short-term rental use in any residential district and allows bed-and-breakfast inns only with a use permit; ADUs carry a 30-day minimum rental term | 12%, plus 2% at hotels in the tourism district |
Don’t pay for vacation-rental income unless a valid permit exists and can pass to you at closing. A 2019 county staff report estimated about 450 unpermitted short-term rentals in the unincorporated area, so a rental history proves nothing.
Rent rules
For long-term rentals the baseline is the state’s Tenant Protection Act (AB 1482, Civil Code 1947.12): yearly increases on covered units are capped at 5% plus the change in the cost of living, or 10%, whichever is lower. Housing first certified for occupancy in the past 15 years is exempt (mobilehomes excepted), as are many single-family homes and condos not owned by a REIT or corporation, with written notice to the tenant; the law expires on January 1, 2030 unless extended (Civil Code 1947.12).
| Jurisdiction | Local rule we confirmed |
|---|---|
| American Canyon | Mobilehome Park Rent Stabilization Program (ACMC chapter 15.04, 1995, amended 2011), with vacancy control; newly built spaces exempt |
| Yountville | Rental Property Registration Program (2017): a calendar-year permit for every residential rental, with the number in all advertising |
| Napa, St. Helena, Calistoga, unincorporated county | None confirmed in our review; ask the city or county, especially about mobilehome space rents |
Wildfire, fire hazard zones, AB 38 and insurance
Read a parcel’s fire history alongside its price.
| Fire (CAL FIRE name) | Started | Acres | Structures destroyed |
|---|---|---|---|
| Atlas Fire (Southern LNU Complex) | October 9, 2017, off Atlas Peak Road | 51,624 (Napa and Solano) | 783 |
| Tubbs Fire (Central LNU Complex) | October 8, 2017, off Highway 128 and Bennett Lane, Calistoga | 36,807 (Napa and Sonoma) | 5,636 |
| Nuns, Adobe, Norrbom, Pressley, Partrick and Oakmont fires (Central LNU Complex) | October 9, 2017 | 44,573 (Napa and Sonoma) | 1,355 |
| LNU Lightning Complex | August 17, 2020 | 363,220 (five counties) | Not given on the incident page |
| Glass Fire | September 27, 2020, near Crystal Springs Road | 67,484 (Napa and Sonoma) | 1,528 |
Look the parcel up on the state’s Fire Hazard Severity Zone viewer, linked from the fire-map pages of the City of Napa, St. Helena and Yountville; St. Helena notes its updated local maps are the first since 2008. In a High or Very High zone, AB 38 (Civil Code 1102.19) has required since July 1, 2021 that the seller provide documentation of defensible-space compliance from an inspection made within six months before the sale, or, if that isn’t available, that both sides agree in writing that the buyer will obtain compliance within a year of closing (State Fire Marshal).
Insurance cost can change a deal. On May 1, 2026 the Department of Insurance reported that the FAIR Plan, the state’s insurer of last resort, added about 16,000 residential policies in the first quarter, against 35,000 to 50,000 a quarter from 2024 through September 2025 (CDI). Ask for quotes in the first days of escrow. In the unincorporated county, Napa County runs 20 volunteer and career fire stations and offers a chipping program.
Water, groundwater, wells and septic
Outside the city and town systems, ask early whether a home is on a private well or a small water system.
| Area | Main water source, as each agency describes it |
|---|---|
| City of Napa | Lake Hennessey, Milliken Reservoir and the State Water Project |
| American Canyon | State Water Project via the North Bay Aqueduct, with peak-season supplements from Napa and Vallejo |
| Yountville | Treated water bought from the California Department of Veterans Affairs, mainly from Rector Reservoir |
| St. Helena | Bell Canyon Reservoir, the Stonebridge wells and water bought from the City of Napa |
| Calistoga | Kimball Reservoir (about a third of demand) and State Water Project water |
| Unincorporated areas | Private wells or small systems, such as the Howell Mountain Mutual Water Company in Angwin; wells permitted by Napa County Environmental Health |
Groundwater falls under the Sustainable Groundwater Management Act (SGMA). The state ranks the Napa Valley Subbasin (basin 2-002.01) high priority, raised from medium in 2019 for reasons the county says weren’t groundwater conditions. Napa County is its groundwater sustainability agency (DWR SGMA portal); it adopted the subbasin’s plan on January 11, 2022, and the state approved it in January 2023 (Natural Resources Agency). The county’s groundwater FAQ lists the Napa-Sonoma Lowlands, Pope Valley and Berryessa Valley basins as very low priority, with no SGMA actions required, and says domestic wells pumping under two acre-feet a year can be exempt from metering, reporting and fees (Napa County).
County Environmental Health permits septic systems from conventional and engineered designs to alternative treatment systems, pretreatment units and hold-and-haul tanks, inspects the alternative systems (Napa County) and lists contractors who monitor them. Its page mentions no inspection at sale, so arrange your own. On a rural parcel, ask for:
- the well log, a recent yield test and water-quality results;
- the septic permit, the bedroom count it was designed for and a pumping and inspection report;
- any shared-well or road maintenance agreement recorded on title.
Agricultural land, the Ag Preserve and the Williamson Act
Napa County created California’s first agricultural preserve, and the rules below apply to agriculturally designated land in the unincorporated county.
| Rule | What it does | Year |
|---|---|---|
| Agricultural Preserve (Ordinance 274) | About 23,000 acres at the start, more than 32,000 today, per Napa Valley Vintners | April 1968 |
| Measure A | Voter-adopted growth management system for slow growth | 1980 |
| Measures J and P | Converting land the General Plan designates agricultural needs a public vote; the policies can’t change without one until after December 31, 2058 | 1990, 2008 |
| Minimum parcel sizes | 40 acres in Agricultural Resource areas; 160 acres in Agriculture, Watershed and Open Space areas, each with listed exceptions | General Plan |
| Winery Definition Ordinance (No. 947) | New wineries need a 10-acre parcel; new or expanded wineries must source at least 75% of their grapes in Napa County | January 23, 1990 |
| Conservation Regulations (County Code 18.108) | Erosion control plan for earth disturbance on slopes over 5%; a use permit exception on 30–50% slopes or within stream and wetland setbacks | Current code |
| Williamson Act contracts | 84,955 acres on 955 parcels; at least 10 acres of prime or 40 of non-prime land; 10-year terms that renew each year unless non-renewed | January 1, 2026 |
A Williamson Act contract can lower property tax: for 2026–27, 681 of the 955 contracted parcels were assessed below their Prop 13 values, by $14,056,807 in total (Napa County). Ask whether a parcel is under contract and whether non-renewal has been filed, and read the contract before pricing the land.
Is any of Napa County in the coastal zone?
No. Napa County has no ocean coastline, so Coastal Commission rules don’t apply. Tidal water comes up the Napa River instead: its lower 17 miles, ending at San Pablo Bay, are estuarine (SF Bay Water Board). For a parcel on the marsh or tidal river, ask early which agencies must approve work there.
Buying land or a vineyard in Napa County
Land value here comes from vines, water and permits. The county’s 2025 crop report valued all agricultural production at $974,204,600, of which winegrapes were $968,687,700 from 42,937 bearing acres; Cabernet Sauvignon averaged $8,645 a ton (Napa County Agricultural Commissioner). The Final 2025 Grape Crush Report ranked District 4, Napa County, first in California at $6,635.85 a ton, 4.5% below 2024 (CDFA/USDA NASS).
Small parcels cost far more per acre. Assessor appraisal records for 168 Napa vineyard properties (2017–2021) averaged about $632,598 an acre for 1 to 10 acres, $190,645 for 10 to 40 acres and $145,683 for 40 to 100 acres (Wine Business Journal, 2025). They are appraisals, not sale prices, but compare price per acre only between parcels of similar size.
- Winery potential: under the Winery Definition Ordinance a new winery needs at least 10 acres. If a listing includes a winery, get its existing permit and production and visitor limits.
- Plantable acres: check slopes and stream setbacks against the Conservation Regulations before counting them.
- A second home: in the unincorporated county an ADU can be up to 1,200 square feet and a junior ADU up to 500, and either the junior unit or the main house must be owner-occupied.
- Contracts: read any Williamson Act contract and grape purchase agreements before pricing.
The 19 appellations, from the 1981 Napa Valley AVA to the 2024 Crystal Springs of Napa Valley AVA, are set out in our Napa Valley appellation guide. For the transaction, see vineyards and wineries for sale in Napa County, our vineyard real estate hub and the vineyard due-diligence checklist.
Getting around Napa County
Residents averaged 24.9 minutes to work (ACS 2020–2024). Highway 29 is the main road up the valley, running through American Canyon, Napa, Yountville and St. Helena to Calistoga, with the Silverado Trail on the valley’s east side. Highway 12 through Jameson Canyon, four lanes for its full six miles, links Highway 29 with Interstate 80 in Solano County. At Soscol Junction, where Highway 29, Highway 221 and Soscol Ferry Road meet, Caltrans and the Napa Valley Transportation Authority built a $56.7 million flyover and two roundabouts; Caltrans gave fall 2024 for opening to traffic and fall 2025 for finishing construction (Caltrans).
VINE Transit’s regional buses are Route 10 between Calistoga and Napa Valley College, Routes 11 and 11X to Vallejo, Route 21 to Solano County and Route 29, the Napa–BART Express; seven routes serve the City of Napa and flexible services cover the other towns (VINE Transit). From Vallejo, San Francisco Bay Ferry boats reach San Francisco in about an hour, for $10 one way from July 2026 (SF Bay Ferry). The Napa Valley Vine Trail has 12.5 miles open between Napa and Yountville; the 11 miles on to St. Helena were still in engineering in September 2026 (Vine Trail Coalition).
Napa County Airport has no commercial airline service; the county points travelers to the Sonoma County, Oakland, Sacramento and San Francisco airports (Napa County).
How Diamond Real Estate Group helps buyers in Napa County
Most of the work happens before the offer. We confirm whether the parcel is in a city or the unincorporated county, pull its fire zone and history, check the water source and septic permit with the agency that issued them, read any rental permit, Williamson Act contract or winery permit, and price from sales of the same kind of property, not the county median.
- How we work with buyers, from the first tour to closing.
- Agents and brokerages serving Napa County, with licenses linked.
- Luxury homes and estates in Napa and Sonoma and investment property.
- Selling first? Start with our seller services.
- Comparing wine counties? Read Sonoma versus Napa for homebuyers and what living in Napa is like.
Napa County real estate FAQs
How much do homes cost in Napa County?
C.A.R.’s county median was $918,000 in September 2026, up from $900,000 a year earlier. Town medians range from $699,697 in American Canyon’s ZIP code (three months to August 2026) to $2,199,503 in St. Helena’s (three months to June 2026), both Redfin calculations.
Which cities and towns are in Napa County?
Five are incorporated: the cities of American Canyon, Calistoga, Napa and St. Helena, and the Town of Yountville. Angwin, Oakville, Pope Valley, Rutherford, Silverado and the rest of the county are unincorporated.
Is there land for sale in Napa County, and can I split or build on it?
Yes, but agricultural land carries 40- or 160-acre minimum parcel sizes, with listed exceptions, so a split needs enough acreage for each new parcel to meet the minimum, and Measures J and P require a countywide vote to convert designated farmland. Before paying for building potential, confirm with county planning that the parcel is legal and buildable and that a well and septic system can be permitted.
Can I buy a vineyard with a winery in Napa County?
Yes. Under the 1990 Winery Definition Ordinance a new winery needs at least 10 acres and must source at least 75% of its grapes in the county, so a permitted winery is a different purchase from bare vineyard land. Ask for its permit and production and visitor limits, and see our Napa County vineyards and wineries guide.
Can I use a Napa County home as a vacation rental?
Rarely. Short stays are generally banned in the unincorporated county, Calistoga and Yountville; St. Helena caps permits at 25 and bars transfers; and the City of Napa’s 41 whole-home permits are all issued, though an existing one can pass to a buyer. Longer stays fall outside these rules, though Yountville requires a permit for every rental.
Does any city in Napa County charge its own transfer tax?
We found none. Every sale pays the county’s $1.10 per $1,000, about $1,010 on a $918,000 home, and the city or town gets half.
Which school districts serve Napa County?
Napa Valley Unified serves Napa, American Canyon and Yountville, with more than 16,000 students in 26 schools. St. Helena has the St. Helena Unified School District, Angwin the Howell Mountain Elementary School District and Pope Valley the Pope Valley Union Elementary School District. Confirm the assignment for any address with the district.
Can I get to BART or San Francisco without a car?
Yes, with planning. VINE Route 29, the Napa–BART Express, runs Monday to Saturday, and Routes 11 and 11X connect with the Vallejo ferry, about an hour from San Francisco. Up-valley, Route 10 runs about hourly on weekdays.
How does buying in Napa County compare with Sonoma County?
Napa’s September 2026 median of $918,000 was a little above Sonoma’s $875,000 (C.A.R.). Napa has no city transfer taxes, while Santa Rosa and Petaluma add $2.00 per $1,000, and in unincorporated areas Napa County generally bans short stays, which Sonoma County licenses except in zones such as R1, R2 and R3. See our Sonoma County real estate guide.
What should I check about wildfire insurance before buying in the hills?
Look up the Fire Hazard Severity Zone, ask for the seller’s AB 38 defensible-space report in a High or Very High zone, and get quotes in the first days of escrow. The Department of Insurance reported FAIR Plan growth slowing to about 16,000 new residential policies statewide in early 2026.
Do rural Napa County homes use wells and septic systems?
Often, outside city water and sewer service. County Environmental Health permits both, and its page mentions no inspection at sale, so order your own. Ask whether the well draws from the high-priority Napa Valley Subbasin or a very low priority basin such as Pope Valley.
Where are new homes being built in Napa County?
American Canyon has the clearest example: KB Home opened Sorrel at Watson Ranch in May 2026 with homes from the $590,000s. Elsewhere growth is slow by design: St. Helena had permitted 24 of its 256-unit 2023–2031 target by mid-2024 (draft LAFCO review), and Calistoga rations residential allocations yearly.
Are mobile homes part of the Napa County market?
Yes. Napa LAFCO’s 2016 review reported about a quarter of Calistoga’s housing units as mobile homes, Yountville’s housing includes mobile home communities, and American Canyon’s code has a mobilehome park overlay and rent stabilization for park spaces. Read the park’s lease and rules alongside the home itself.
Sources & notes
- C.A.R.: September 2026; Census QuickFacts; Redfin city and ZIP pages (October 2026)
- Napa County: transfer tax, TOT, short-term rentals (2019), wells and septic, groundwater FAQs, Williamson Act, ADUs, General Plan, 2025 crop report
- Rental codes: Napa, St. Helena, Calistoga, Yountville, American Canyon
- CAL FIRE: Atlas, Tubbs, Nuns complex, LNU, Glass; AB 38 bulletin; CDI (May 2026)
- Civil Code 1947.12; BOE: Proposition 13; FHFA: 2026 loan limits; DWR: County of Napa GSA
- 2025 Grape Crush Report; Wine Business Journal; Reclamation; VINE Transit; SF Bay Ferry
Figures carry their dates where they appear, and we refresh market numbers every quarter. This is general information, not legal, tax or insurance advice; confirm the rules for a specific property with the agency named. Last reviewed October 2026 by Matthew Martinez.
Explore Napa County and plan your next move
Share your preferred location, budget, property requirements and timing. We can help organize a focused search, arrange showings or discuss preparing a property for sale.
- American Canyon real estate
- Angwin real estate
- Calistoga real estate
- Oakville real estate
- Pope Valley real estate
- Rutherford real estate
- St. Helena real estate
- Yountville real estate
- Napa real estate
Local resource: Napa County planning and building services. Check official information for the address you are considering; area descriptions do not establish a property’s permitted uses.
Napa County: distinguish the residence from the estate ambition
A Napa County search can involve a town residence, an occasional base, extensive grounds, or a transaction with genuine operating assets. The useful comparison begins by naming which of those propositions the buyer wants rather than treating a wine-country setting as one type of ownership.
Buying: identify what is actually included
Compare Napa, American Canyon, and Yountville through the actual residences and ownership arrangements offered. For Oakville, Rutherford, or Pope Valley property involving land, distinguish residence, infrastructure, operating agreements, equipment, and proposed future use.
The residence, estate, and vineyard evidence worksheet helps make that transaction boundary explicit. Use the detailed vineyard due diligence guide when an agricultural asset is genuinely part of the transaction.
Selling: support the feature before marketing the possibility
Describe the property's current accommodation and documented improvements clearly. Keep operating claims, rental ideas, and prospective construction separate from the amenities already supported by evidence. An attractive plan can be discussed accurately without being presented as an existing right.
Napa County's PBES record resource is a starting point for county-held documents and cautions that the online results may be incomplete. Establish the city or county authority responsible for the parcel before routing a current-use or project question.
Use county buyer representation for a defined purchase brief and county seller representation for evidence-led preparation. Compare Calistoga and St. Helena as their own local property searches rather than as interchangeable estate labels.
