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Single Family ResidenceResidential
$517,907$439 / 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 95How 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
Last sold for $18,500 on Dec 18, 2014

30455 227TH PL SE

BLACK DIAMOND, WA 98010
3
Beds
1
Baths
1,180 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.
0.2 ac
Lot SizeThe size of the land the home sits on, from county records.
1977
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$518K
$495K low$541K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$18,500 · Dec 18, 2014

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,531 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$458,000 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$197,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$261,000
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$465,000
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$458,000

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyKING
Lot (acres)The size of the land the home sits on, from county records.0.20
HeatingThe type of heating system in the home.Electric
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(8)

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

Foreclosure Filings(1)

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

E
Sawyer Woods Elementary SchoolA-
Elementary · Grades KG–5 · 0.3 mi
H
Kentlake High SchoolC+
High · Grades 9–12 · 0.8 mi
M
Cedar Heights Middle SchoolC-
Middle · Grades 6–8 · 2.8 mi

District: Kent School District

Neighborhood · ZIP 98010These 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.83
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.116
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.237

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.35%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.7%
PopulationHow many people live in this area.6,853
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.363 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$136,748
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$169,893
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.54 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.43%

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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

30455 227th Pl Se 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 87% of homes in Black Diamond 98010
  • Costs more per square foot than 75% of homes in Black Diamond 98010
  • Smaller than 90% of homes in Black Diamond 98010
  • Older than 79% of homes in Black Diamond 98010

What homes are worth in Black Diamond 98010

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

This home
$370K$1.7M

This home is worth more than 13% of homes in Black Diamond 98010.

How it measures up in Black Diamond 98010

The dot is this home. The mark in the middle is the typical home in Black Diamond 98010.

Estimated value$517,907
CheaperTypical $752,114Pricier

Pricier than 13% of homes nearby

Price per ft²$439
CheaperTypical $358Pricier

Pricier than 75% of homes nearby

Living area1,180 ft²
SmallerTypical 2,260 ft²Bigger

Bigger than 10% of homes nearby

Lot size0.2 ac
SmallerTypical 0.17 acBigger

Bigger than 55% of homes nearby

Year built1977
OlderTypical 2008Newer

Newer than 21% of homes nearby

How 30455 227th Pl Se ranks against every home in each area.
MeasureThis homeBlack Diamond 98010King County
Estimated valuepricier than$517,90713% of homes18% of homes
Price per ft²pricier than$43975% of homes38% of homes
Living areabigger than1,180 ft²10% of homes20% of homes
Lot sizebigger than0.2 ac55% of homes50% of homes
Year builtnewer than197721% of homes48% of homes

About 30455 227th Pl Se

How much is 30455 227th Pl Se, Black Diamond, WA worth?

The TopHap Estimate for 30455 227th Pl Se, Black Diamond, WA is $517,907 as of Aug 30, 2026. The likely range is $494,575 to $541,239. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 30455 227th Pl Se, Black Diamond, WA last sell?

30455 227th Pl Se, Black Diamond, WA last sold on Dec 18, 2014 for $18,500, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 30455 227th Pl Se, Black Diamond, WA?

30455 227th Pl Se, Black Diamond, WA has 3 bedrooms, 1 bathrooms, 1,180 square feet of living space and a 0.20-acre lot.

When was 30455 227th Pl Se, Black Diamond, WA built?

30455 227th Pl Se, Black Diamond, WA was built in 1977, making it 49 years old. The building has 1 story.

What schools serve 30455 227th Pl Se, Black Diamond, WA?

30455 227th Pl Se, Black Diamond, WA is assigned to Sawyer Woods Elementary School (elementary), rated A-; Kentlake High School (high), rated C+; Cedar Heights Middle School (middle), rated C-. All sit in Kent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 30455 227th Pl Se, Black Diamond, WA compare to other homes in Black Diamond 98010?

Among the 3,588 homes in Black Diamond 98010, it is worth more than 13% of them ($517,907 against a typical $752,114), its price per square foot is higher than 75% of them ($439 against a typical $358), it is bigger than 10% of them (1,180 ft² against a typical 2,260 ft²), its lot is bigger than 55% of them (0.2 ac against a typical 0.17 ac) and it is newer than 21% of them (1977 against a typical 2008). Measured against all of King County, it is worth more than 18% 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 30455 227th Pl Se, Black Diamond, WA?

The 2026 property tax bill for 30455 227th Pl Se, Black Diamond, WA was $4,531. The county assessed it at $458,000.

More homes on 227th Pl Se

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