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Single Family ResidenceResidential
$703,731$648 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 86How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $765,000 on Apr 2, 2020

4820 HIGHWAY 1

UNINCORP COUNTY, CA
1
Beds
1
Baths
1,086 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
0.22 ac
Lot SizeThe size of the land the home sits on, from county records.
1950
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
1
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$704K
$604K low$803K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$765,000 · Apr 2, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,666 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$214,230 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$66,603
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$147,627
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$210,031

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.40
99
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
75
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
30
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.197 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.1 percent flood zone

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountySONOMA
Lot (acres)The size of the land the home sits on, from county records.0.22
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system in the home.None
CoolingThe type of cooling or air conditioning in the home.None
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(12)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Bodega Bay Elementary SchoolA
Elementary · Grades KG–5 · 3.1 mi
M
Tomales Elementary SchoolB
Middle · Grades KG–8 · 12.9 mi
H
Tomales High SchoolD
High · Grades 9–12 · 13.0 mi

District: Shoreline Unified School District

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Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

4820 Highway 1 measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Costs more per square foot than 82% of homes in Sonoma County
  • Smaller than 84% of homes in Sonoma County
  • Older than 85% of homes in Sonoma County

How it measures up in Sonoma County

The dot is this home. The mark in the middle is the typical home in Sonoma County.

Estimated value$703,731
CheaperTypical $771,004Pricier

Pricier than 39% of homes nearby

Price per ft²$648
CheaperTypical $487Pricier

Pricier than 82% of homes nearby

Living area1,086 ft²
SmallerTypical 1,560 ft²Bigger

Bigger than 16% of homes nearby

Lot size0.22 ac
SmallerTypical 0.16 acBigger

Bigger than 64% of homes nearby

Year built1950
OlderTypical 1978Newer

Newer than 15% of homes nearby

How 4820 Highway 1 ranks against every home in each area.
MeasureThis homeSonoma County
Estimated valuepricier than$703,73139% of homes
Price per ft²pricier than$64882% of homes
Living areabigger than1,086 ft²16% of homes
Lot sizebigger than0.22 ac64% of homes
Year builtnewer than195015% of homes

About 4820 Highway 1

How much is 4820 Highway 1, Unincorp County, CA worth?

The TopHap Estimate for 4820 Highway 1, Unincorp County, CA is $703,731 as of Sep 24, 2026. The likely range is $604,413 to $803,049. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4820 Highway 1, Unincorp County, CA last sell?

4820 Highway 1, Unincorp County, CA last sold on Apr 2, 2020 for $765,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 4820 Highway 1, Unincorp County, CA?

4820 Highway 1, Unincorp County, CA has 1 bedrooms, 1 bathrooms, 1,086 square feet of living space and a 0.22-acre lot.

When was 4820 Highway 1, Unincorp County, CA built?

4820 Highway 1, Unincorp County, CA was built in 1950, making it 76 years old. The building has 1 story.

What schools serve 4820 Highway 1, Unincorp County, CA?

4820 Highway 1, Unincorp County, CA is assigned to Bodega Bay Elementary School (elementary), rated A; Tomales Elementary School (middle), rated B; Tomales High School (high), rated D. All sit in Shoreline Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4820 Highway 1, Unincorp County, CA compare to other homes in Sonoma County?

Among the 155,404 homes in Sonoma County, it is worth more than 39% of them ($703,731 against a typical $771,004), its price per square foot is higher than 82% of them ($648 against a typical $487), it is bigger than 16% of them (1,086 ft² against a typical 1,560 ft²), its lot is bigger than 64% of them (0.22 ac against a typical 0.16 ac) and it is newer than 15% of them (1950 against a typical 1978). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 4820 Highway 1, Unincorp County, CA?

The 2025 property tax bill for 4820 Highway 1, Unincorp County, CA was $2,666. The county assessed it at $214,230.

More homes on Highway 1

Closest homes

Assigned schools

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