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Single Family ResidenceResidential
$318,320
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 91How 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 $217,500 on Dec 10, 2019

29920 GRENNAN RD

ROCK FALLS, IL 61071
0
Baths
5 ac
Lot SizeThe size of the land the home sits on, from county records.

Valuation

$318K
$289K low$347K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$217,500 · Dec 10, 2019

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,658 (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.$85,458 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$16,858
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$68,600
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$75,360
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$256,374

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.10
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
18
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
31
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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
CountyWHITESIDE
Lot (acres)The size of the land the home sits on, from county records.5.00
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
Montmorency Ccsd #145C
Elementary · Grades KG–8 · 1.0 mi
H
Rock Falls Township High SchoolC-
High · Grades 9–12 · 4.5 mi

District: Rock Falls Township High School District 301

Neighborhood · ZIP 61071These 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.121
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.86
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.42

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.91%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.12%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.15%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.12,838
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.168 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$59,685
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$72,090
Average tempThe average temperature here across a full year.50°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.55%

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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

29920 Grennan Rd 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 Rock Falls 61071
  • Among the largest lots in Rock Falls 61071

What homes are worth in Rock Falls 61071

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

This home
$41K$345K

This home is worth more than 97% of homes in Rock Falls 61071.

How it measures up in Rock Falls 61071

The dot is this home. The mark in the middle is the typical home in Rock Falls 61071.

Estimated value$318,320
CheaperTypical $117,661Pricier

Pricier than 97% of homes nearby

Lot size5 ac
SmallerTypical 0.25 acBigger

Bigger than almost all homes nearby

How 29920 Grennan Rd ranks against every home in each area.
MeasureThis homeRock Falls 61071Whiteside County
Estimated valuepricier than$318,32097% of homes95% of homes
Lot sizebigger than5 acalmost all homes98% of homes

About 29920 Grennan Rd

How much is 29920 Grennan Rd, Rock Falls, IL worth?

The TopHap Estimate for 29920 Grennan Rd, Rock Falls, IL is $318,320 as of Jul 14, 2026. The likely range is $289,498 to $347,142. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 29920 Grennan Rd, Rock Falls, IL last sell?

29920 Grennan Rd, Rock Falls, IL last sold on Dec 10, 2019 for $217,500, according to the county's recorded deed.

What schools serve 29920 Grennan Rd, Rock Falls, IL?

29920 Grennan Rd, Rock Falls, IL is assigned to Montmorency Ccsd #145 (elementary), rated C; Rock Falls Township High School (high), rated C-. All sit in Rock Falls Township High School District 301. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 29920 Grennan Rd, Rock Falls, IL compare to other homes in Rock Falls 61071?

Among the 5,302 homes in Rock Falls 61071, it is worth more than 97% of them ($318,320 against a typical $117,661) and its lot is bigger than almost all of them (5 ac against a typical 0.25 ac). Measured against all of Whiteside County, it is worth more than 95% 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 29920 Grennan Rd, Rock Falls, IL?

The 2025 property tax bill for 29920 Grennan Rd, Rock Falls, IL was $6,658. The county assessed it at $85,458.

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Assigned schools

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