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Single Family ResidenceResidential
$1,031,452$607 / 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 85How 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 $400,000 on May 28, 1999

3670 HAPPY VALLEY RD

SANTA ROSA, CA 95404
3
Beds
2
Baths
1,700 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.
1.07 ac
Lot SizeThe size of the land the home sits on, from county records.
1976
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
3
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1M
$880K low$1.2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$400,000 · May 28, 1999

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,400 (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.$639,620 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$303,818
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$335,802
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$627,079

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.19
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
68
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
27
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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.minimal

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
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1977
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(5)

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
Madrone Elementary SchoolB
Elementary · Grades KG–6 · 1.1 mi
M
Rincon Valley Middle SchoolC+
Middle · Grades 7–8 · 1.7 mi
H
Maria Carrillo High SchoolA+
High · Grades 9–12 · 2.1 mi

District: Santa Rosa High School District

Neighborhood · ZIP 95404These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.102
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.82
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.598

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.43,241
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.541 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$104,299
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$140,649
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.43 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

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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

3670 Happy Valley Rd 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.

  • Worth more than 77% of homes in Sonoma County
  • Costs more per square foot than 82% of homes in Santa Rosa 95404
  • Has a bigger lot than 85% of homes in Santa Rosa 95404

What homes are worth in Santa Rosa 95404

Each bar is how many homes fall in that price range. The marker is this home.

This home
$372K$2.5M

This home is worth more than 69% of homes in Santa Rosa 95404.

How it measures up in Santa Rosa 95404

The dot is this home. The mark in the middle is the typical home in Santa Rosa 95404.

Estimated value$1,031,452
CheaperTypical $826,463Pricier

Pricier than 69% of homes nearby

Price per ft²$607
CheaperTypical $498Pricier

Pricier than 82% of homes nearby

Living area1,700 ft²
SmallerTypical 1,696 ft²Bigger

Bigger than 51% of homes nearby

Lot size1.07 ac
SmallerTypical 0.18 acBigger

Bigger than 85% of homes nearby

Year built1976
OlderTypical 1970Newer

Newer than 57% of homes nearby

How 3670 Happy Valley Rd ranks against every home in each area.
MeasureThis homeSanta Rosa 95404Sonoma County
Estimated valuepricier than$1,031,45269% of homes77% of homes
Price per ft²pricier than$60782% of homes77% of homes
Living areabigger than1,700 ft²51% of homes58% of homes
Lot sizebigger than1.07 ac85% of homes85% of homes
Year builtnewer than197657% of homes46% of homes

About 3670 Happy Valley Rd

How much is 3670 Happy Valley Rd, Santa Rosa, CA worth?

The TopHap Estimate for 3670 Happy Valley Rd, Santa Rosa, CA is $1,031,452 as of Sep 24, 2026. The likely range is $880,433 to $1,182,471. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 3670 Happy Valley Rd, Santa Rosa, CA last sell?

3670 Happy Valley Rd, Santa Rosa, CA last sold on May 28, 1999 for $400,000, according to the county's recorded deed.

How big is 3670 Happy Valley Rd, Santa Rosa, CA?

3670 Happy Valley Rd, Santa Rosa, CA has 3 bedrooms, 2 bathrooms and 1,700 square feet of living space.

When was 3670 Happy Valley Rd, Santa Rosa, CA built?

3670 Happy Valley Rd, Santa Rosa, CA was built in 1976, making it 50 years old. The building has 1 story.

What schools serve 3670 Happy Valley Rd, Santa Rosa, CA?

3670 Happy Valley Rd, Santa Rosa, CA is assigned to Madrone Elementary School (elementary), rated B; Rincon Valley Middle School (middle), rated C+; Maria Carrillo High School (high), rated A+. All sit in Santa Rosa High School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 3670 Happy Valley Rd, Santa Rosa, CA compare to other homes in Santa Rosa 95404?

Among the 12,323 homes in Santa Rosa 95404, it is worth more than 69% of them ($1,031,452 against a typical $826,463), its price per square foot is higher than 82% of them ($607 against a typical $498), it is bigger than 51% of them (1,700 ft² against a typical 1,696 ft²), its lot is bigger than 85% of them (1.07 ac against a typical 0.18 ac) and it is newer than 57% of them (1976 against a typical 1970). Measured against all of Sonoma County, it is worth more than 77% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 3670 Happy Valley Rd, Santa Rosa, CA?

The 2025 property tax bill for 3670 Happy Valley Rd, Santa Rosa, CA was $7,400. The county assessed it at $639,620.

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