821 Foster Rd is a 1,516 square foot house on a 7,220 square foot lot with 3 bedrooms. - it last sold on September 29, 2005 for $579,000. Based on Redfin's Napa data, we estimate the home's value is $811,672.
Single-familyProperty Type
1990Year Built
7,220 sq ftLot Size
$535Est. Price/Sq.Ft.
Source:Public Records
Redfin Estimate
$811,672
$233K since sold in September 2005$9,000 since July
Recently sold homes
Estimate history
Homes for sale
This home's estimate is 7.5% higher than the average sale price ($755K) of 6 comparable homes.
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Zoning and permits
Zoning
Permits
RS 7
Single-Family Residential District
This district implements the single-family residential category of the General Plan and applies to areas intended to develop into a single-family detached unit pattern. RS areas typically include custom home subdivisions on hillsides or constrained sites, and post war tract subdivisions, which usually have uniform platting patterns, setbacks and building types. This district provides opportunities for low density detached single-family homes, accessory dwelling units, clustered and planned developments, mobile homes, manufactured housing and compatible uses such as day care and smaller residential care facilities. Bed and breakfast inns, and public and quasi-public uses may also be allowed in appropriate locations at the discretion of the city.
Permitted uses
Include but are not limited to:
Housing-Single unit
Housing-Senior
Housing-Student
Educational/school
Oct 27, 2017 • Final
Windows doors
Remove and replace the front entry door.
Remodel
May 9, 2008 • Final
Windows doors
Remodel
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Property details
Interior
Heating & Cooling
Heating Type: Central
Fireplace Information
# of Fireplaces: 1
Has Fireplace
Room Information
# of Rooms: 6
Exterior
Exterior Information
Construction Type: Wood
Building Construction Quality: Good
Building Type: Flat
Property Information
Subdivision Name: CEDAR KNOLLS
Living Sq. Ft: 1,516
Building Sq. Ft: 1,516
Legal Description: LOT 16 CEDAR KNOLLS SUB 7R/M75
Parking & Garage Information
Parking Type: Attached Garage
Garage/Parking Sq. Ft: 443
Garage / Carport Type: Attached
Lot Information
# of Buildings: 1
Land Sq. Ft: 7,220
Legal Lot Number: 16
Acres: 0.1657
Zoning Code: RS 7
County Use Description: 1 FAMILY RESID
Financial
Assessor Information
Assessment Year: 2025
Public facts
Beds: 3
Baths: —
Sq. Ft.: 1,516
Stories: —
Lot Size: 7,220 square feet
Style: Single Family Residential
Year Built: 1990
Year Renovated: 1990
County: Napa County
APN: 43152004000
Home facts updated by county records on Jul 15, 2026
Around this home
Schools
Snow Elementary School
Public K-5 • Assigned • 0.3mi
2/10
Provided by GreatSchools
Lifestyle
Provided by Walk Score and Local Logic
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
3/10 Fire Factor
0.77% chance of being in a wildfire in next 30 years
5/10 Heat Factor
7 days above 95° expected this year, 15 days in 30 years
1/10 Wind Factor
Minimal risk of severe winds over next 30 years
9/10 Air Factor
16 unhealthy days expected this year, 17 days in 30 years
Provided by First Street
Historical weather
Napa, CA • 94558
Average low and high temperatures (°F)
59
39
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41
68
44
67
45
77
51
84
54
85
55
90
59
85
57
76
51
61
44
56
41
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
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Oct
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Dec
Sun exposure
In this area, properties receive around 11.6 hours in
June and 4.9 hours in December, placing it above the
U.S. average for solar exposure.
11.6 hrs
4.9 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$772,000 – $934,000
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