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Single Family ResidenceResidential
$468,676$166 / 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 73How 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 $45,000 on Jun 29, 2016

45 UNION ST

WARREN, ME 04864
3
Beds
1
Baths
2,820 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.
5.12 ac
Lot SizeThe size of the land the home sits on, from county records.
1870
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.

Valuation

$469K
$344K low$594K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$45,000 · Jun 29, 2016

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,305 (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.$303,200 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$84,600
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$218,600

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.40
56
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
5
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
45
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
95
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
2
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.39 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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Conventional
CountyKNOX
Lot (acres)The size of the land the home sits on, from county records.5.12
ConstructionThe main material the home's frame and walls are built from.Brick
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Space
PoolWhether the property has a pool, and what kind, such as in-ground.No

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

E
Warren Community SchoolD
Elementary · Grades PK–6 · 0.3 mi
H
Medomak Valley High SchoolC+
High · Grades 9–12 · 3.4 mi
M
Medomak Middle SchoolB-
Middle · Grades 7–8 · 3.5 mi

District: School Administrative District 40

Neighborhood · ZIP 04864These 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.56
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.79
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.54

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.88%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.13%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.3%
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.4,804
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.101 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$83,709
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$101,350
Average tempThe average temperature here across a full year.45°F
Annual precipHow much rain and melted snow falls here in a typical year.49 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.50%

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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

45 Union 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 more than 78% of homes in Warren 04864
  • Costs less per square foot than 94% of homes in Warren 04864
  • Bigger than 94% of homes in Warren 04864
  • Has a bigger lot than 84% of homes in Knox County
  • Older than 92% of homes in Warren 04864

What homes are worth in Warren 04864

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

This home
$200K$724K

This home is worth more than 78% of homes in Warren 04864.

How it measures up in Warren 04864

The dot is this home. The mark in the middle is the typical home in Warren 04864.

Estimated value$468,676
CheaperTypical $373,673Pricier

Pricier than 78% of homes nearby

Price per ft²$166
CheaperTypical $280Pricier

Pricier than 6% of homes nearby

Living area2,820 ft²
SmallerTypical 1,386 ft²Bigger

Bigger than 94% of homes nearby

Lot size5.12 ac
SmallerTypical 1.75 acBigger

Bigger than 78% of homes nearby

Year built1870
OlderTypical 1987Newer

Newer than 8% of homes nearby

How 45 Union St ranks against every home in each area.
MeasureThis homeWarren 04864Knox County
Estimated valuepricier than$468,67678% of homes53% of homes
Price per ft²pricier than$1666% of homes6% of homes
Living areabigger than2,820 ft²94% of homes89% of homes
Lot sizebigger than5.12 ac78% of homes84% of homes
Year builtnewer than18708% of homes10% of homes

About 45 Union St

How much is 45 Union St, Warren, ME worth?

The TopHap Estimate for 45 Union St, Warren, ME is $468,676 as of Sep 24, 2026. The likely range is $343,737 to $593,615. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 45 Union St, Warren, ME last sell?

45 Union St, Warren, ME last sold on Jun 29, 2016 for $45,000, according to the county's recorded deed.

How big is 45 Union St, Warren, ME?

45 Union St, Warren, ME has 3 bedrooms, 1 bathrooms, 2,820 square feet of living space and a 5.12-acre lot.

When was 45 Union St, Warren, ME built?

45 Union St, Warren, ME was built in 1870, making it 156 years old. It is a conventional home. The building has 2 stories.

What schools serve 45 Union St, Warren, ME?

45 Union St, Warren, ME is assigned to Warren Community School (elementary), rated D; Medomak Valley High School (high), rated C+; Medomak Middle School (middle), rated B-. All sit in School Administrative District 40. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 45 Union St, Warren, ME compare to other homes in Warren 04864?

Among the 1,903 homes in Warren 04864, it is worth more than 78% of them ($468,676 against a typical $373,673), its price per square foot is higher than 6% of them ($166 against a typical $280), it is bigger than 94% of them (2,820 ft² against a typical 1,386 ft²), its lot is bigger than 78% of them (5.12 ac against a typical 1.75 ac) and it is newer than 8% of them (1870 against a typical 1987). Measured against all of Knox 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 45 Union St, Warren, ME?

The 2025 property tax bill for 45 Union St, Warren, ME was $4,305. The county assessed it at $303,200.

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Assigned schools

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