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Single Family ResidenceResidential
$551,653$327 / 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 Sep 24, 2026
Last sold for $548,873 on Feb 13, 2026

509 S WALNUT ST

BOISE, ID 83712
3
Beds
2.5
Baths
1,688 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.
1,742 ft²
Lot SizeThe size of the land the home sits on, from county records.
1970
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$552K
$522K low$581K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$548,873 · Feb 13, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,802 (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.$547,100 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$537,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$547,100

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.7 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.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
StyleThe architectural style of the home, such as ranch or colonial.Townhouse
CountyADA
Lot (acres)The size of the land the home sits on, from county records.0.04
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Yes
CoolingThe type of cooling or air conditioning in the home.Yes
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.Garage, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 56 ft²Patio · 126 ft²

Transaction History(3)

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
Adams Elementary SchoolA+
Elementary · Grades PK–6 · 0.6 mi
H
Boise Senior High SchoolA-
High · Grades 9–12 · 1.5 mi
M
North Junior High SchoolA
Middle · Grades 7–9 · 1.8 mi

District: Boise City Independent School District 1

Neighborhood · ZIP 83712These 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.105
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 100.73

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.36%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.0%
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.11,027
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.440 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$110,343
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$156,221
Average tempThe average temperature here across a full year.47°F
Annual precipHow much rain and melted snow falls here in a typical year.21 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.64%

Owner Tools

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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

509 S Walnut 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 92% of homes in Boise 83712
  • Costs less per square foot than 89% of homes in East End
  • Smaller than 76% of homes in Boise 83712
  • Has a smaller lot than 97% of homes in Ada County
  • Older than 86% of homes in Ada County

What homes are worth in Boise 83712

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

This home
$367K$2.5M

This home is worth more than 8% of homes in Boise 83712.

How it measures up in Boise 83712

The dot is this home. The mark in the middle is the typical home in Boise 83712.

Estimated value$551,653
CheaperTypical $877,199Pricier

Pricier than 8% of homes nearby

Price per ft²$327
CheaperTypical $406Pricier

Pricier than 11% of homes nearby

Living area1,688 ft²
SmallerTypical 2,266 ft²Bigger

Bigger than 24% of homes nearby

Lot size1,742 ft²
SmallerTypical 0.21 acBigger

Bigger than 5% of homes nearby

Year built1970
OlderTypical 1980Newer

Newer than 33% of homes nearby

How 509 S Walnut St ranks against every home in each area.
MeasureThis homeEast EndBoise 83712Ada County
Estimated valuepricier than$551,65310% of homes8% of homes53% of homes
Price per ft²pricier than$32711% of homes11% of homes69% of homes
Living areabigger than1,688 ft²29% of homes24% of homes37% of homes
Lot sizebigger than1,742 ft²7% of homes5% of homes3% of homes
Year builtnewer than197039% of homes33% of homes14% of homes

About 509 S Walnut St

How much is 509 S Walnut St, Boise, ID worth?

The TopHap Estimate for 509 S Walnut St, Boise, ID is $551,653 as of Sep 24, 2026. The likely range is $522,168 to $581,138. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 S Walnut St, Boise, ID last sell?

509 S Walnut St, Boise, ID last sold on Feb 13, 2026 for $548,873, according to the county's recorded deed.

How big is 509 S Walnut St, Boise, ID?

509 S Walnut St, Boise, ID has 3 bedrooms, 2.5 bathrooms, 1,688 square feet of living space and a 0.04-acre lot.

When was 509 S Walnut St, Boise, ID built?

509 S Walnut St, Boise, ID was built in 1970, making it 56 years old. It is a townhouse home. The building has 2 stories.

What schools serve 509 S Walnut St, Boise, ID?

509 S Walnut St, Boise, ID is assigned to Adams Elementary School (elementary), rated A+; Boise Senior High School (high), rated A-; North Junior High School (middle), rated A. All sit in Boise City Independent School District 1. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 S Walnut St, Boise, ID compare to other homes in Boise 83712?

Among the 3,261 homes in Boise 83712, it is worth more than 8% of them ($551,653 against a typical $877,199), its price per square foot is higher than 11% of them ($327 against a typical $406), it is bigger than 24% of them (1,688 ft² against a typical 2,266 ft²), its lot is bigger than 5% of them (1,742 ft² against a typical 0.21 ac) and it is newer than 33% of them (1970 against a typical 1980). Measured against all of Ada County, it is worth more than 53% 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 509 S Walnut St, Boise, ID?

The 2025 property tax bill for 509 S Walnut St, Boise, ID was $3,802. The county assessed it at $547,100.

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