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Single Family ResidentialResidential
$70,965$64 / 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 72How 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

505 W 1ST AVE

MONMOUTH, IL 61462
0
Baths
1,114 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.
0.1 ac
Lot SizeThe size of the land the home sits on, from county records.
1920
Year BuiltThe year the home was originally built, according to county records.

Valuation

$71K
$51K low$91K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,641 (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.$22,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,320
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$21,580
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$21,100
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$68,700

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.0.10
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.

H
Monmouth-Roseville High SchoolD+
High · Grades 9–12 · 0.1 mi
E
Lincoln Early Childhood School
Elementary · Grades PK–1 · 1.2 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

505 W 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.

  • Worth less than 70% of homes in Monmouth 61462
  • Costs less per square foot than 65% of homes in Monmouth 61462
  • Smaller than 66% of homes in Warren County
  • Has a smaller lot than 96% of homes in Warren County

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 30% 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$70,965
CheaperTypical $99,437Pricier

Pricier than 30% of homes nearby

Price per ft²$64
CheaperTypical $78Pricier

Pricier than 35% of homes nearby

Living area1,114 ft²
SmallerTypical 1,277 ft²Bigger

Bigger than 37% of homes nearby

Lot size0.1 ac
SmallerTypical 0.22 acBigger

Bigger than 6% of homes nearby

Year built1920
OlderTypical 1930Newer

Newer than 42% of homes nearby

How 505 W 1st Ave ranks against every home in each area.
MeasureThis homeMonmouth 61462Warren County
Estimated valuepricier than$70,96530% of homes30% of homes
Price per ft²pricier than$6435% of homes37% of homes
Living areabigger than1,114 ft²37% of homes34% of homes
Lot sizebigger than0.1 ac6% of homes4% of homes
Year builtnewer than192042% of homes42% of homes

About 505 W 1st Ave

How much is 505 W 1st Ave, Monmouth, IL worth?

The TopHap Estimate for 505 W 1st Ave, Monmouth, IL is $70,965 as of Sep 24, 2026. The likely range is $51,282 to $90,648. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 505 W 1st Ave, Monmouth, IL last sell?

505 W 1st Ave, Monmouth, IL last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 505 W 1st Ave, Monmouth, IL?

505 W 1st Ave, Monmouth, IL has 1,114 square feet of living space and a 0.10-acre lot.

When was 505 W 1st Ave, Monmouth, IL built?

505 W 1st Ave, Monmouth, IL was built in 1920, making it 106 years old.

What schools serve 505 W 1st Ave, Monmouth, IL?

505 W 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 505 W 1st Ave, Monmouth, IL compare to other homes in Monmouth 61462?

Among the 3,868 homes in Monmouth 61462, it is worth more than 30% of them ($70,965 against a typical $99,437), its price per square foot is higher than 35% of them ($64 against a typical $78), it is bigger than 37% of them (1,114 ft² against a typical 1,277 ft²), its lot is bigger than 6% of them (0.1 ac against a typical 0.22 ac) and it is newer than 42% of them (1920 against a typical 1930). Measured against all of Warren County, it is worth more than 30% 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 505 W 1st Ave, Monmouth, IL?

The 2025 property tax bill for 505 W 1st Ave, Monmouth, IL was $1,641. The county assessed it at $22,900.

More homes on W 1st Ave

Closest homes

More homes in Monmouth 61462

Assigned schools

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