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Single Family ResidenceResidential
$411,432$957 / 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 74How 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 $196,001 on Aug 24, 2005

421 18TH AVE

SEASIDE, OR 97138
1
Beds
1
Baths
430 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
1932
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$411K
$306K low$517K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$196,001 · Aug 24, 2005

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,079 (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.$53,506 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$53,506
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$72,912
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$328,251

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.33
11
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
3
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
31
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
100
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
21
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.15 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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
StyleThe architectural style of the home, such as ranch or colonial.Tlog Home
CountyClatsop
Lot (acres)The size of the land the home sits on, from county records.0.11
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Masonry (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.None
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
Gearhart Elementary School
Elementary · Grades KG–5 · 1.5 mi
H
Seaside High SchoolD-
High · Grades 9–12 · 1.7 mi
M
Broadway Middle SchoolB
Middle · Grades 6–8 · 1.7 mi

District: Seaside School District 10

Neighborhood · ZIP 97138These 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.136
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.105
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.298

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.67%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.15%
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.1.1%
PopulationHow many people live in this area.11,382
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.33 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$63,096
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$85,187
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.135 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.48%

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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

421 18th 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 less than 69% of homes in Seaside 97138
  • Among the highest price per square foot in Seaside 97138
  • Among the smallest homes in Clatsop County
  • Has a smaller lot than 75% of homes in Clatsop County
  • Older than 83% of homes in Seaside 97138

What homes are worth in Seaside 97138

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

This home
$199K$1.7M

This home is worth more than 31% of homes in Seaside 97138.

How it measures up in Seaside 97138

The dot is this home. The mark in the middle is the typical home in Seaside 97138.

Estimated value$411,432
CheaperTypical $503,329Pricier

Pricier than 31% of homes nearby

Price per ft²$957
CheaperTypical $367Pricier

Pricier than almost all homes nearby

Living area430 ft²
SmallerTypical 1,395 ft²Bigger

Bigger than 2% of homes nearby

Lot size0.11 ac
SmallerTypical 0.22 acBigger

Bigger than 32% of homes nearby

Year built1932
OlderTypical 1976Newer

Newer than 17% of homes nearby

How 421 18th Ave ranks against every home in each area.
MeasureThis homeSeaside 97138Clatsop County
Estimated valuepricier than$411,43231% of homes31% of homes
Price per ft²pricier than$957almost all homes98% of homes
Living areabigger than430 ft²2% of homesalmost no homes
Lot sizebigger than0.11 ac32% of homes25% of homes
Year builtnewer than193217% of homes19% of homes

About 421 18th Ave

How much is 421 18th Ave, Seaside, OR worth?

The TopHap Estimate for 421 18th Ave, Seaside, OR is $411,432 as of Aug 30, 2026. The likely range is $305,779 to $517,085. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 421 18th Ave, Seaside, OR last sell?

421 18th Ave, Seaside, OR last sold on Aug 24, 2005 for $196,001, according to the county's recorded deed.

How big is 421 18th Ave, Seaside, OR?

421 18th Ave, Seaside, OR has 1 bedrooms, 1 bathrooms, 430 square feet of living space and a 0.11-acre lot.

When was 421 18th Ave, Seaside, OR built?

421 18th Ave, Seaside, OR was built in 1932, making it 94 years old. It is a tlog home home. The building has 1 story.

What schools serve 421 18th Ave, Seaside, OR?

421 18th Ave, Seaside, OR is assigned to Gearhart Elementary School (elementary); Seaside High School (high), rated D-; Broadway Middle School (middle), rated B. All sit in Seaside School District 10. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 18th Ave, Seaside, OR compare to other homes in Seaside 97138?

Among the 7,417 homes in Seaside 97138, it is worth more than 31% of them ($411,432 against a typical $503,329), its price per square foot is higher than almost all of them ($957 against a typical $367), it is bigger than 2% of them (430 ft² against a typical 1,395 ft²), its lot is bigger than 32% of them (0.11 ac against a typical 0.22 ac) and it is newer than 17% of them (1932 against a typical 1976). Measured against all of Clatsop County, it is worth more than 31% 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 421 18th Ave, Seaside, OR?

The 2025 property tax bill for 421 18th Ave, Seaside, OR was $1,079. The county assessed it at $53,506.

More homes on 18th Ave

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Assigned schools

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