Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$350,075$197 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $356,000 on Jul 7, 2025

311 KNOLL RIDGE DR

HILLS, IA 52235
5
Beds
3
Baths
1,773 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.
0.29 ac
Lot SizeThe size of the land the home sits on, from county records.
2024
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
11
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

$350K
$330K low$370K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$356,000 · Jul 7, 2025
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$0
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$0
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.102%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$355,000
DUANE BLAKE ETAL · recorded Jul 8, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$684 (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.$98,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$55,100
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$43,100
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$44,100
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$98,200

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.14 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.Conventional
CountyJOHNSON
Lot (acres)The size of the land the home sits on, from county records.0.28
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Yes
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, Attached
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 · 40 ft²Porch · 88 ft²

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
Alexander Elementary SchoolC+
Elementary · Grades PK–6 · 4.7 mi
H
West High SchoolB+
High · Grades 9–12 · 7.0 mi
M
Northwest Junior High SchoolC
Middle · Grades 7–8 · 8.9 mi

District: Iowa City Community School District

Neighborhood · ZIP 52235These 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.164
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.85
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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.18%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.20%
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.33
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.59 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$78,704
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$95,575
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.36 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.61%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.Yes

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

311 Knoll Ridge Dr 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 97% of homes in Hills 52235
  • Costs more per square foot than 84% of homes in Hills 52235
  • Bigger than 86% of homes in Hills 52235
  • Among the newest homes in Hills 52235

What homes are worth in Hills 52235

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

This home
$146K$370K

This home is worth more than 97% of homes in Hills 52235.

How it measures up in Hills 52235

The dot is this home. The mark in the middle is the typical home in Hills 52235.

Estimated value$350,075
CheaperTypical $194,771Pricier

Pricier than 97% of homes nearby

Price per ft²$197
CheaperTypical $154Pricier

Pricier than 84% of homes nearby

Living area1,773 ft²
SmallerTypical 1,382 ft²Bigger

Bigger than 86% of homes nearby

Lot size0.29 ac
SmallerTypical 0.29 acBigger

Bigger than 50% of homes nearby

Year built2024
OlderTypical 2008Newer

Newer than almost all homes nearby

How 311 Knoll Ridge Dr ranks against every home in each area.
MeasureThis homeHills 52235Johnson County
Estimated valuepricier than$350,07597% of homes57% of homes
Price per ft²pricier than$19784% of homes32% of homes
Living areabigger than1,773 ft²86% of homes75% of homes
Lot sizebigger than0.29 ac50% of homes53% of homes
Year builtnewer than2024almost all homesalmost all homes

About 311 Knoll Ridge Dr

How much is 311 Knoll Ridge Dr, Hills, IA worth?

The TopHap Estimate for 311 Knoll Ridge Dr, Hills, IA is $350,075 as of Jul 14, 2026. The likely range is $329,915 to $370,235. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 311 Knoll Ridge Dr, Hills, IA last sell?

311 Knoll Ridge Dr, Hills, IA last sold on Jul 7, 2025 for $356,000, according to the county's recorded deed.

How big is 311 Knoll Ridge Dr, Hills, IA?

311 Knoll Ridge Dr, Hills, IA has 5 bedrooms, 3 bathrooms, 1,773 square feet of living space and a 0.28-acre lot.

When was 311 Knoll Ridge Dr, Hills, IA built?

311 Knoll Ridge Dr, Hills, IA was built in 2024, making it 2 years old. It is a conventional home. The building has 1 story.

What schools serve 311 Knoll Ridge Dr, Hills, IA?

311 Knoll Ridge Dr, Hills, IA is assigned to Alexander Elementary School (elementary), rated C+; West High School (high), rated B+; Northwest Junior High School (middle), rated C. All sit in Iowa City Community School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 311 Knoll Ridge Dr, Hills, IA compare to other homes in Hills 52235?

Among the 493 homes in Hills 52235, it is worth more than 97% of them ($350,075 against a typical $194,771), its price per square foot is higher than 84% of them ($197 against a typical $154), it is bigger than 86% of them (1,773 ft² against a typical 1,382 ft²), its lot is bigger than 50% of them (0.29 ac against a typical 0.29 ac) and it is newer than almost all of them (2024 against a typical 2008). Measured against all of Johnson County, it is worth more than 57% 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 311 Knoll Ridge Dr, Hills, IA?

The 2025 property tax bill for 311 Knoll Ridge Dr, Hills, IA was $684. The county assessed it at $98,200.

Closest homes

More homes in Hills 52235

Assigned schools

Explore the area

See this home in context

Open 311 Knoll Ridge Dr on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map