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Single Family ResidenceResidential
$624,172$283 / 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 Jul 14, 2026

421 ROCK RIDGE RD

ALLEN, TX 75002
3
Beds
2
Baths
2,208 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.
2 ac
Lot SizeThe size of the land the home sits on, from county records.
1980
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$624K
$557K low$692K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$336,172
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$268,938
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.48%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$288,000
FIRST UNITED BANK & TRUST CO · recorded Mar 16, 2022

Tax & Assessment

Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$523,758 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$500,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$23,758
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$467,358
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$523,758

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.8 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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
CountyCollin
Lot (acres)The size of the land the home sits on, from county records.2.00
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
FoundationWhat the home is built on, such as a concrete slab, a crawl space, or a basement.Mat/Raft Foundation (Slab)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.Yes
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 321 ft²

Transaction History(2)

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
Lovejoy High SchoolA
High · Grades 9–12 · 0.5 mi
M
Willow Springs Middle SchoolA+
Middle · Grades 7–8 · 2.2 mi
E
Puster Elementary SchoolA+
Elementary · Grades KG–4 · 3.2 mi

District: Lovejoy Independent School District

Neighborhood · ZIP 75002These 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.37
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.101
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.26

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.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.1%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.88,326
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,239 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$121,302
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$148,629
Average tempThe average temperature here across a full year.65°F
Annual precipHow much rain and melted snow falls here in a typical year.41 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.62%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

421 Rock Ridge 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 71% of homes in Allen 75002
  • Costs more per square foot than 92% of homes in Collin County
  • Has a bigger lot than 92% of homes in Collin County
  • Older than 90% of homes in Collin County

What homes are worth in Allen 75002

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

This home
$270K$1.9M

This home is worth more than 71% of homes in Allen 75002.

How it measures up in Allen 75002

The dot is this home. The mark in the middle is the typical home in Allen 75002.

Estimated value$624,172
CheaperTypical $475,750Pricier

Pricier than 71% of homes nearby

Price per ft²$283
CheaperTypical $212Pricier

Pricier than 84% of homes nearby

Living area2,208 ft²
SmallerTypical 2,367 ft²Bigger

Bigger than 43% of homes nearby

Lot size2 ac
SmallerTypical 0.86 acBigger

Bigger than 83% of homes nearby

Year built1980
OlderTypical 1999Newer

Newer than 13% of homes nearby

How 421 Rock Ridge Rd ranks against every home in each area.
MeasureThis homeAllen 75002Collin County
Estimated valuepricier than$624,17271% of homes68% of homes
Price per ft²pricier than$28384% of homes92% of homes
Living areabigger than2,208 ft²43% of homes41% of homes
Lot sizebigger than2 ac83% of homes92% of homes
Year builtnewer than198013% of homes10% of homes

About 421 Rock Ridge Rd

How much is 421 Rock Ridge Rd, Allen, TX worth?

The TopHap Estimate for 421 Rock Ridge Rd, Allen, TX is $624,172 as of Jul 14, 2026. The likely range is $556,677 to $691,667. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 421 Rock Ridge Rd, Allen, TX last sell?

421 Rock Ridge Rd, Allen, TX last sold on Mar 16, 2022, according to the county's recorded deed.

How big is 421 Rock Ridge Rd, Allen, TX?

421 Rock Ridge Rd, Allen, TX has 3 bedrooms, 2 bathrooms, 2,208 square feet of living space and a 2.00-acre lot.

When was 421 Rock Ridge Rd, Allen, TX built?

421 Rock Ridge Rd, Allen, TX was built in 1980, making it 46 years old. The building has 1 story.

What schools serve 421 Rock Ridge Rd, Allen, TX?

421 Rock Ridge Rd, Allen, TX is assigned to Lovejoy High School (high), rated A; Willow Springs Middle School (middle), rated A+; Puster Elementary School (elementary), rated A+. All sit in Lovejoy Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 Rock Ridge Rd, Allen, TX compare to other homes in Allen 75002?

Among the 22,415 homes in Allen 75002, it is worth more than 71% of them ($624,172 against a typical $475,750), its price per square foot is higher than 84% of them ($283 against a typical $212), it is bigger than 43% of them (2,208 ft² against a typical 2,367 ft²), its lot is bigger than 83% of them (2 ac against a typical 0.86 ac) and it is newer than 13% of them (1980 against a typical 1999). Measured against all of Collin County, it is worth more than 68% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

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Closest homes

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