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Residential (General/Single)Residential
$843,697$293 / 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 86How 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 $155,000 on Jan 14, 2011

12428 ROSEMARY AVE

NEW BERLIN, WI 53151
4
Beds
2.5
Baths
2,880 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.
1.36 ac
Lot SizeThe size of the land the home sits on, from county records.
2011
Year BuiltThe year the home was originally built, according to county records.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$844K
$724K low$963K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$155,000 · Jan 14, 2011

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,883 (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.$720,300 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$168,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$551,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$813,300

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.143 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.1 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.Residential (General/Single)
StyleThe architectural style of the home, such as ranch or colonial.Custom Design
CountyWAUKESHA
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(6)

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
Elmwood Elementary SchoolA+
Elementary · Grades PK–6 · 0.9 mi
M
Eisenhower Middle/HighA+
Middle · Grades 7–12 · 2.1 mi

District: New Berlin School District

Neighborhood · ZIP 53151These 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.78
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.76
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.30

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.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.33,202
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,856 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$98,242
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$127,485
Average tempThe average temperature here across a full year.47°F
Annual precipHow much rain and melted snow falls here in a typical year.34 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.54%

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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

12428 Rosemary 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 98% of homes in New Berlin 53151
  • Costs more per square foot than 91% of homes in New Berlin 53151
  • Bigger than 93% of homes in New Berlin 53151
  • Has a bigger lot than 83% of homes in New Berlin 53151
  • Newer than 98% of homes in New Berlin 53151

What homes are worth in New Berlin 53151

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

This home
$202K$836K

This home is worth more than 98% of homes in New Berlin 53151.

How it measures up in New Berlin 53151

The dot is this home. The mark in the middle is the typical home in New Berlin 53151.

Estimated value$843,697
CheaperTypical $418,253Pricier

Pricier than 98% of homes nearby

Price per ft²$293
CheaperTypical $238Pricier

Pricier than 91% of homes nearby

Living area2,880 ft²
SmallerTypical 1,758 ft²Bigger

Bigger than 93% of homes nearby

Lot size1.36 ac
SmallerTypical 0.47 acBigger

Bigger than 83% of homes nearby

Year built2011
OlderTypical 1977Newer

Newer than 98% of homes nearby

How 12428 Rosemary Ave ranks against every home in each area.
MeasureThis homeNew Berlin 53151Waukesha County
Estimated valuepricier than$843,69798% of homes89% of homes
Price per ft²pricier than$29391% of homes79% of homes
Living areabigger than2,880 ft²93% of homes88% of homes
Lot sizebigger than1.36 ac83% of homes82% of homes
Year builtnewer than201198% of homes97% of homes

About 12428 Rosemary Ave

How much is 12428 Rosemary Ave, New Berlin, WI worth?

The TopHap Estimate for 12428 Rosemary Ave, New Berlin, WI is $843,697 as of Sep 24, 2026. The likely range is $724,056 to $963,338. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 12428 Rosemary Ave, New Berlin, WI last sell?

12428 Rosemary Ave, New Berlin, WI last sold on Jan 14, 2011 for $155,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 12428 Rosemary Ave, New Berlin, WI?

12428 Rosemary Ave, New Berlin, WI has 4 bedrooms, 2.5 bathrooms and 2,880 square feet of living space.

When was 12428 Rosemary Ave, New Berlin, WI built?

12428 Rosemary Ave, New Berlin, WI was built in 2011, making it 15 years old. It is a custom design home.

What schools serve 12428 Rosemary Ave, New Berlin, WI?

12428 Rosemary Ave, New Berlin, WI is assigned to Elmwood Elementary School (elementary), rated A+; Eisenhower Middle/High (middle), rated A+. All sit in New Berlin School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 12428 Rosemary Ave, New Berlin, WI compare to other homes in New Berlin 53151?

Among the 11,204 homes in New Berlin 53151, it is worth more than 98% of them ($843,697 against a typical $418,253), its price per square foot is higher than 91% of them ($293 against a typical $238), it is bigger than 93% of them (2,880 ft² against a typical 1,758 ft²), its lot is bigger than 83% of them (1.36 ac against a typical 0.47 ac) and it is newer than 98% of them (2011 against a typical 1977). Measured against all of Waukesha County, it is worth more than 89% 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 12428 Rosemary Ave, New Berlin, WI?

The 2025 property tax bill for 12428 Rosemary Ave, New Berlin, WI was $8,883. The county assessed it at $720,300.

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