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Single Family ResidenceResidential
$534,779$557 / 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 99How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

556 COLBY ST

ASHLAND, CA 94580
2
Beds
1
Baths
960 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.
0.12 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.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$535K
$528K low$541K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,989 (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.$96,159 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$31,757
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$71,402
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$94,137
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$718,920

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.6 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.11%
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.0.2 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
CountyALAMEDA
Lot (acres)The size of the land the home sits on, from county records.0.12
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(11)

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
Hesperian Elementary SchoolD-
Elementary · Grades KG–5 · 0.2 mi
M
Edendale Middle SchoolF
Middle · Grades 6–8 · 0.5 mi
H
San Lorenzo High SchoolC-
High · Grades 9–12 · 0.7 mi

District: San Lorenzo Unified School District

Neighborhood · ZIP 94580These 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.45
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.89
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.582

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.98%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.23%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.28,849
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.8,205 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$97,479
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$130,534
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.20 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

556 Colby St 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 less than 96% of homes in San Lorenzo 94580
  • Costs less per square foot than 72% of homes in Alameda County
  • Smaller than 96% of homes in San Lorenzo 94580
  • Has a smaller lot than 69% of homes in Ashland
  • Older than 68% of homes in Alameda County

What homes are worth in San Lorenzo 94580

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

This home
$500K$997K

This home is worth more than 4% of homes in San Lorenzo 94580.

How it measures up in San Lorenzo 94580

The dot is this home. The mark in the middle is the typical home in San Lorenzo 94580.

Estimated value$534,779
CheaperTypical $754,493Pricier

Pricier than 4% of homes nearby

Price per ft²$557
CheaperTypical $571Pricier

Pricier than 44% of homes nearby

Living area960 ft²
SmallerTypical 1,300 ft²Bigger

Bigger than 4% of homes nearby

Lot size0.12 ac
SmallerTypical 0.12 acBigger

Bigger than 31% of homes nearby

Year built1950
OlderTypical 1951Newer

Newer than 43% of homes nearby

How 556 Colby St ranks against every home in each area.
MeasureThis homeAshlandSan Lorenzo 94580Alameda County
Estimated valuepricier than$534,77924% of homes4% of homes11% of homes
Price per ft²pricier than$55769% of homes44% of homes28% of homes
Living areabigger than960 ft²20% of homes4% of homes10% of homes
Lot sizebigger than0.12 ac31% of homes31% of homes34% of homes
Year builtnewer than195053% of homes43% of homes32% of homes

About 556 Colby St

How much is 556 Colby St, Ashland, CA worth?

The TopHap Estimate for 556 Colby St, Ashland, CA is $534,779 as of Aug 30, 2026. The likely range is $528,420 to $541,138. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 556 Colby St, Ashland, CA last sell?

556 Colby St, Ashland, CA last sold on Nov 21, 2019, according to the county's recorded deed.

How big is 556 Colby St, Ashland, CA?

556 Colby St, Ashland, CA has 2 bedrooms, 1 bathrooms, 960 square feet of living space and a 0.12-acre lot.

When was 556 Colby St, Ashland, CA built?

556 Colby St, Ashland, CA was built in 1950, making it 76 years old. The building has 1 story.

What schools serve 556 Colby St, Ashland, CA?

556 Colby St, Ashland, CA is assigned to Hesperian Elementary School (elementary), rated D-; Edendale Middle School (middle), rated F; San Lorenzo High School (high), rated C-. All sit in San Lorenzo Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 556 Colby St, Ashland, CA compare to other homes in San Lorenzo 94580?

Among the 8,131 homes in San Lorenzo 94580, it is worth more than 4% of them ($534,779 against a typical $754,493), its price per square foot is higher than 44% of them ($557 against a typical $571), it is bigger than 4% of them (960 ft² against a typical 1,300 ft²), its lot is bigger than 31% of them (0.12 ac against a typical 0.12 ac) and it is newer than 43% of them (1950 against a typical 1951). Measured against all of Alameda County, it is worth more than 11% 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 556 Colby St, Ashland, CA?

The 2025 property tax bill for 556 Colby St, Ashland, CA was $1,989. The county assessed it at $96,159.

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