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Single Family ResidenceResidential
$648,595$546 / 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 92How 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 $192,000 on Oct 17, 1997

15501 MONTE ROSA AVE

GUERNEVILLE, CA 95446
3
Beds
1
Baths
1,188 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.
0.67 ac
Lot SizeThe size of the land the home sits on, from county records.
1966
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
5
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

$649K
$598K low$699K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$192,000 · Oct 17, 1997

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,915 (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.$312,686 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$89,565
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$223,121
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$306,556

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.41
100
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
82
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.
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.51%
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.0.67
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system 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.Carport (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

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
Guerneville Elementary (Charter)C-
Elementary · Grades KG–8 · 1.6 mi
H
Analy High SchoolA-
High · Grades 9–12 · 12.7 mi

District: Guerneville Elementary School District

Neighborhood · ZIP 95446These 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.181
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 100.331

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.71%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.26%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.5,101
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.165 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$87,907
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$128,173
Average tempThe average temperature here across a full year.57°F
Annual precipHow much rain and melted snow falls here in a typical year.53 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

15501 Monte Rosa Ave 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 72% of homes in Guerneville 95446
  • Costs more per square foot than 67% of homes in Guerneville 95446
  • Smaller than 77% of homes in Sonoma County
  • Has a bigger lot than 89% of homes in Guerneville 95446
  • Newer than 72% of homes in Guerneville 95446

What homes are worth in Guerneville 95446

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

This home
$212K$1.2M

This home is worth more than 72% of homes in Guerneville 95446.

How it measures up in Guerneville 95446

The dot is this home. The mark in the middle is the typical home in Guerneville 95446.

Estimated value$648,595
CheaperTypical $504,926Pricier

Pricier than 72% of homes nearby

Price per ft²$546
CheaperTypical $472Pricier

Pricier than 67% of homes nearby

Living area1,188 ft²
SmallerTypical 1,100 ft²Bigger

Bigger than 56% of homes nearby

Lot size0.67 ac
SmallerTypical 0.14 acBigger

Bigger than 89% of homes nearby

Year built1966
OlderTypical 1950Newer

Newer than 72% of homes nearby

How 15501 Monte Rosa Ave ranks against every home in each area.
MeasureThis homeGuerneville 95446Sonoma County
Estimated valuepricier than$648,59572% of homes30% of homes
Price per ft²pricier than$54667% of homes67% of homes
Living areabigger than1,188 ft²56% of homes23% of homes
Lot sizebigger than0.67 ac89% of homes80% of homes
Year builtnewer than196672% of homes31% of homes

About 15501 Monte Rosa Ave

How much is 15501 Monte Rosa Ave, Guerneville, CA worth?

The TopHap Estimate for 15501 Monte Rosa Ave, Guerneville, CA is $648,595 as of Sep 24, 2026. The likely range is $598,084 to $699,106. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 15501 Monte Rosa Ave, Guerneville, CA last sell?

15501 Monte Rosa Ave, Guerneville, CA last sold on Oct 17, 1997 for $192,000, according to the county's recorded deed.

How big is 15501 Monte Rosa Ave, Guerneville, CA?

15501 Monte Rosa Ave, Guerneville, CA has 3 bedrooms, 1 bathrooms, 1,188 square feet of living space and a 0.67-acre lot.

When was 15501 Monte Rosa Ave, Guerneville, CA built?

15501 Monte Rosa Ave, Guerneville, CA was built in 1966, making it 60 years old. The building has 2 stories.

What schools serve 15501 Monte Rosa Ave, Guerneville, CA?

15501 Monte Rosa Ave, Guerneville, CA is assigned to Guerneville Elementary (Charter) (elementary), rated C-; Analy High School (high), rated A-. All sit in Guerneville Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 15501 Monte Rosa Ave, Guerneville, CA compare to other homes in Guerneville 95446?

Among the 3,050 homes in Guerneville 95446, it is worth more than 72% of them ($648,595 against a typical $504,926), its price per square foot is higher than 67% of them ($546 against a typical $472), it is bigger than 56% of them (1,188 ft² against a typical 1,100 ft²), its lot is bigger than 89% of them (0.67 ac against a typical 0.14 ac) and it is newer than 72% of them (1966 against a typical 1950). Measured against all of Sonoma County, it is worth more than 30% 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 15501 Monte Rosa Ave, Guerneville, CA?

The 2025 property tax bill for 15501 Monte Rosa Ave, Guerneville, CA was $3,915. The county assessed it at $312,686.

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