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Single Family ResidenceResidential
$439,466$138 / 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 96How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $448,900 on Aug 3, 2021

21851 ROSE MARIS LN

TOMBALL, TX 77377
4
Beds
3
Baths
3,184 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.
0.3 ac
Lot SizeThe size of the land the home sits on, from county records.
2018
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.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$439K
$422K low$457K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$448,900 · Aug 3, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,482 (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.$442,122 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$70,891
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$371,231
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$429,099
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$442,122

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
CountyHARRIS
Lot (acres)The size of the land the home sits on, from county records.0.30
ConstructionThe main material the home's frame and walls are built from.Brick
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Outdoor kitchen

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.

M
Grand Lakes Junior High SchoolA
Middle · Grades 7–8 · 1.9 mi
E
Grand Oaks Elementary SchoolB+
Elementary · Grades PK–4 · 2.0 mi
H
Tomball High SchoolB+
High · Grades 9–12 · 6.1 mi

District: Tomball Independent School District

Neighborhood · ZIP 77377These 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.86
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.20

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.3.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.42,020
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,095 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$111,135
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$144,540
Average tempThe average temperature here across a full year.68°F
Annual precipHow much rain and melted snow falls here in a typical year.48 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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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

21851 Rose Maris Ln 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 79% of homes in Harris County
  • Costs less per square foot than 85% of homes in Tomball 77377
  • Bigger than 88% of homes in Harris County
  • Has a bigger lot than 85% of homes in Harris County
  • Newer than 89% of homes in Harris County

What homes are worth in Tomball 77377

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

This home
$210K$1.6M

This home is worth more than 56% of homes in Tomball 77377.

How it measures up in Tomball 77377

The dot is this home. The mark in the middle is the typical home in Tomball 77377.

Estimated value$439,466
CheaperTypical $417,783Pricier

Pricier than 56% of homes nearby

Price per ft²$138
CheaperTypical $162Pricier

Pricier than 15% of homes nearby

Living area3,184 ft²
SmallerTypical 2,518 ft²Bigger

Bigger than 75% of homes nearby

Lot size0.3 ac
SmallerTypical 0.19 acBigger

Bigger than 75% of homes nearby

Year built2018
OlderTypical 2005Newer

Newer than 76% of homes nearby

How 21851 Rose Maris Ln ranks against every home in each area.
MeasureThis homeTomball 77377Harris County
Estimated valuepricier than$439,46656% of homes79% of homes
Price per ft²pricier than$13815% of homes33% of homes
Living areabigger than3,184 ft²75% of homes88% of homes
Lot sizebigger than0.3 ac75% of homes85% of homes
Year builtnewer than201876% of homes89% of homes

About 21851 Rose Maris Ln

How much is 21851 Rose Maris Ln, Tomball, TX worth?

The TopHap Estimate for 21851 Rose Maris Ln, Tomball, TX is $439,466 as of Aug 30, 2026. The likely range is $421,691 to $457,241. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21851 Rose Maris Ln, Tomball, TX last sell?

21851 Rose Maris Ln, Tomball, TX last sold on Aug 3, 2021 for $448,900, according to the county's recorded deed.

How big is 21851 Rose Maris Ln, Tomball, TX?

21851 Rose Maris Ln, Tomball, TX has 4 bedrooms, 3 bathrooms, 3,184 square feet of living space and a 0.30-acre lot.

When was 21851 Rose Maris Ln, Tomball, TX built?

21851 Rose Maris Ln, Tomball, TX was built in 2018, making it 8 years old. The building has 2 stories.

What schools serve 21851 Rose Maris Ln, Tomball, TX?

21851 Rose Maris Ln, Tomball, TX is assigned to Grand Lakes Junior High School (middle), rated A; Grand Oaks Elementary School (elementary), rated B+; Tomball High School (high), rated B+. All sit in Tomball Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21851 Rose Maris Ln, Tomball, TX compare to other homes in Tomball 77377?

Among the 16,186 homes in Tomball 77377, it is worth more than 56% of them ($439,466 against a typical $417,783), its price per square foot is higher than 15% of them ($138 against a typical $162), it is bigger than 75% of them (3,184 ft² against a typical 2,518 ft²), its lot is bigger than 75% of them (0.3 ac against a typical 0.19 ac) and it is newer than 76% of them (2018 against a typical 2005). Measured against all of Harris County, it is worth more than 79% 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 21851 Rose Maris Ln, Tomball, TX?

The 2025 property tax bill for 21851 Rose Maris Ln, Tomball, TX was $11,482. The county assessed it at $442,122.

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