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Single Family ResidenceResidential
$242,860$147 / 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 78How 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

306 4TH AVE

PORTSMOUTH, IA 51565
4
Beds
1
Baths
1,648 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.
0.38 ac
Lot SizeThe size of the land the home sits on, from county records.
1918
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
8
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

$243K
$189K low$297K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,940 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$153,633 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$16,726
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$136,907
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$134,479
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$153,633

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyShelby
Lot (acres)The size of the land the home sits on, from county records.0.39
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Brick (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air
CoolingThe type of cooling or air conditioning in the home.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 168 ft²

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

M
Harlan Community Middle SchoolA-
Middle · Grades 6–8 · 9.4 mi
E
Harlan Primary School
Elementary · Grades PK–2 · 9.5 mi
H
Harlan High SchoolB+
High · Grades 9–12 · 9.5 mi

District: Harlan Community School District

Neighborhood · ZIP 51565These 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.104
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 100.19

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.16%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.7%
PopulationHow many people live in this area.452
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.10 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$83,664
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$84,993
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.33 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.59%

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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

306 4th 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 67% of homes in Shelby County
  • Has a smaller lot than 69% of homes in Portsmouth 51565
  • Older than 65% of homes in Shelby County

What homes are worth in Portsmouth 51565

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

This home
$76K$511K

This home is worth more than 53% of homes in Portsmouth 51565.

How it measures up in Portsmouth 51565

The dot is this home. The mark in the middle is the typical home in Portsmouth 51565.

Estimated value$242,860
CheaperTypical $234,705Pricier

Pricier than 53% of homes nearby

Price per ft²$147
CheaperTypical $151Pricier

Pricier than 47% of homes nearby

Living area1,648 ft²
SmallerTypical 1,568 ft²Bigger

Bigger than 56% of homes nearby

Lot size0.38 ac
SmallerTypical 1.97 acBigger

Bigger than 31% of homes nearby

Year built1918
OlderTypical 1940Newer

Newer than 38% of homes nearby

How 306 4th Ave ranks against every home in each area.
MeasureThis homePortsmouth 51565Shelby County
Estimated valuepricier than$242,86053% of homes67% of homes
Price per ft²pricier than$14747% of homes62% of homes
Living areabigger than1,648 ft²56% of homes60% of homes
Lot sizebigger than0.38 ac31% of homes52% of homes
Year builtnewer than191838% of homes35% of homes

About 306 4th Ave

How much is 306 4th Ave, Portsmouth, IA worth?

The TopHap Estimate for 306 4th Ave, Portsmouth, IA is $242,860 as of Sep 24, 2026. The likely range is $188,552 to $297,168. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 306 4th Ave, Portsmouth, IA last sell?

306 4th Ave, Portsmouth, IA last sold on May 31, 1989, according to the county's recorded deed.

How big is 306 4th Ave, Portsmouth, IA?

306 4th Ave, Portsmouth, IA has 4 bedrooms, 1 bathrooms, 1,648 square feet of living space and a 0.39-acre lot.

When was 306 4th Ave, Portsmouth, IA built?

306 4th Ave, Portsmouth, IA was built in 1918, making it 108 years old. The building has 2 stories.

What schools serve 306 4th Ave, Portsmouth, IA?

306 4th Ave, Portsmouth, IA is assigned to Harlan Community Middle School (middle), rated A-; Harlan Primary School (elementary); Harlan High School (high), rated B+. All sit in Harlan Community School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 306 4th Ave, Portsmouth, IA compare to other homes in Portsmouth 51565?

Among the 234 homes in Portsmouth 51565, it is worth more than 53% of them ($242,860 against a typical $234,705), its price per square foot is higher than 47% of them ($147 against a typical $151), it is bigger than 56% of them (1,648 ft² against a typical 1,568 ft²), its lot is bigger than 31% of them (0.38 ac against a typical 1.97 ac) and it is newer than 38% of them (1918 against a typical 1940). Measured against all of Shelby County, it is worth more than 67% 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 306 4th Ave, Portsmouth, IA?

The 2024 property tax bill for 306 4th Ave, Portsmouth, IA was $1,940. The county assessed it at $153,633.

More homes on 4th Ave

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Assigned schools

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