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Single Family ResidentialResidential
$108,638$60 / 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 89How 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 $72,000 on Sep 11, 2020

509 E 1ST AVE

MONMOUTH, IL 61462
0
Baths
1,809 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.
0.2 ac
Lot SizeThe size of the land the home sits on, from county records.
1900
Year BuiltThe year the home was originally built, according to county records.

Valuation

$109K
$97K low$121K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$72,000 · Sep 11, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,319 (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.$29,790 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$2,300
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$27,490
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$27,450
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$89,370

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residential
CountyWARREN
Lot (acres)The size of the land the home sits on, from county records.0.20
PoolWhether the property has a pool, and what kind, such as in-ground.No

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.

H
Monmouth-Roseville High SchoolD+
High · Grades 9–12 · 0.5 mi
E
Lincoln Early Childhood School
Elementary · Grades PK–1 · 0.7 mi
M
Monmouth-Roseville Jr High SchoolD+
Middle · Grades 7–8 · 12.7 mi

District: Monmouth-Roseville Community Unit School District 238

Neighborhood · ZIP 61462These 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.107
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.78
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.89%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.14%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.18%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.10,689
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.70 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$67,274
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$82,942
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.37 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.56%

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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 E 1st 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.

  • Costs less per square foot than 69% of homes in Monmouth 61462
  • Bigger than 80% of homes in Monmouth 61462
  • Has a smaller lot than 73% of homes in Warren County
  • Older than 84% of homes in Monmouth 61462

What homes are worth in Monmouth 61462

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

This home
$24K$331K

This home is worth more than 56% of homes in Monmouth 61462.

How it measures up in Monmouth 61462

The dot is this home. The mark in the middle is the typical home in Monmouth 61462.

Estimated value$108,638
CheaperTypical $99,313Pricier

Pricier than 56% of homes nearby

Price per ft²$60
CheaperTypical $79Pricier

Pricier than 31% of homes nearby

Living area1,809 ft²
SmallerTypical 1,280 ft²Bigger

Bigger than 80% of homes nearby

Lot size0.2 ac
SmallerTypical 0.22 acBigger

Bigger than 38% of homes nearby

Year built1900
OlderTypical 1930Newer

Newer than 16% of homes nearby

How 509 E 1st Ave ranks against every home in each area.
MeasureThis homeMonmouth 61462Warren County
Estimated valuepricier than$108,63856% of homes56% of homes
Price per ft²pricier than$6031% of homes32% of homes
Living areabigger than1,809 ft²80% of homes80% of homes
Lot sizebigger than0.2 ac38% of homes27% of homes
Year builtnewer than190016% of homes17% of homes

About 509 E 1st Ave

How much is 509 E 1st Ave, Monmouth, IL worth?

The TopHap Estimate for 509 E 1st Ave, Monmouth, IL is $108,638 as of Sep 24, 2026. The likely range is $96,657 to $120,619. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 E 1st Ave, Monmouth, IL last sell?

509 E 1st Ave, Monmouth, IL last sold on Sep 11, 2020 for $72,000, according to the county's recorded deed.

How big is 509 E 1st Ave, Monmouth, IL?

509 E 1st Ave, Monmouth, IL has 1,809 square feet of living space and a 0.20-acre lot.

When was 509 E 1st Ave, Monmouth, IL built?

509 E 1st Ave, Monmouth, IL was built in 1900, making it 126 years old.

What schools serve 509 E 1st Ave, Monmouth, IL?

509 E 1st Ave, Monmouth, IL is assigned to Monmouth-Roseville High School (high), rated D+; Lincoln Early Childhood School (elementary); Monmouth-Roseville Jr High School (middle), rated D+. All sit in Monmouth-Roseville Community Unit School District 238. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 E 1st Ave, Monmouth, IL compare to other homes in Monmouth 61462?

Among the 3,868 homes in Monmouth 61462, it is worth more than 56% of them ($108,638 against a typical $99,313), its price per square foot is higher than 31% of them ($60 against a typical $79), it is bigger than 80% of them (1,809 ft² against a typical 1,280 ft²), its lot is bigger than 38% of them (0.2 ac against a typical 0.22 ac) and it is newer than 16% of them (1900 against a typical 1930). Measured against all of Warren County, it is worth more than 56% 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 E 1st Ave, Monmouth, IL?

The 2025 property tax bill for 509 E 1st Ave, Monmouth, IL was $1,319. The county assessed it at $29,790.

More homes on E 1st Ave

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