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Single Family ResidenceResidential
$746,998$337 / 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 94How 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 $162,500 on Jan 29, 1997

18 N CASTLEGREEN CIR

SPRING, TX 77381
2.5
Baths
2,215 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.
1996
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$747K
$703K low$791K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$162,500 · Jan 29, 1997

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,065 (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.$565,293 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$80,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$485,293
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$534,336
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$565,293

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.12 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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
StyleThe architectural style of the home, such as ranch or colonial.Conventional
CountyMONTGOMERY
Lot (acres)The size of the land the home sits on, from county records.0.20
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.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 80 ft²Porch · 29 ft²

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Galatas Elementary SchoolA+
Elementary · Grades KG–4 · 0.8 mi
H
The Woodlands High SchoolA+
High · Grades 9–12 · 1.4 mi
M
J.L. McCullough Junior High SchoolA+
Middle · Grades 7–8 · 2.7 mi

District: Conroe Independent School District

Neighborhood · ZIP 77381These 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.67
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.23

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.38%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.9%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.43,284
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,209 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$136,502
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$172,466
Average tempThe average temperature here across a full year.68°F
Annual precipHow much rain and melted snow falls here in a typical year.49 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

18 N Castlegreen Cir 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 87% of homes in Montgomery County
  • Costs more per square foot than 96% of homes in Cochran's Crossing
  • Smaller than 78% of homes in Cochran's Crossing
  • Newer than 93% of homes in Cochran's Crossing

What homes are worth in Spring 77381

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

This home
$199K$2.5M

This home is worth more than 67% of homes in Spring 77381.

How it measures up in Spring 77381

The dot is this home. The mark in the middle is the typical home in Spring 77381.

Estimated value$746,998
CheaperTypical $595,798Pricier

Pricier than 67% of homes nearby

Price per ft²$337
CheaperTypical $236Pricier

Pricier than 94% of homes nearby

Living area2,215 ft²
SmallerTypical 2,594 ft²Bigger

Bigger than 34% of homes nearby

Lot size0.2 ac
SmallerTypical 0.22 acBigger

Bigger than 41% of homes nearby

Year built1996
OlderTypical 1990Newer

Newer than 85% of homes nearby

How 18 N Castlegreen Cir ranks against every home in each area.
MeasureThis homeCochran's CrossingSpring 77381Montgomery County
Estimated valuepricier than$746,99860% of homes67% of homes87% of homes
Price per ft²pricier than$33796% of homes94% of homes96% of homes
Living areabigger than2,215 ft²22% of homes34% of homes56% of homes
Lot sizebigger than0.2 ac42% of homes41% of homes42% of homes
Year builtnewer than199693% of homes85% of homes35% of homes

About 18 N Castlegreen Cir

How much is 18 N Castlegreen Cir, Spring, TX worth?

The TopHap Estimate for 18 N Castlegreen Cir, Spring, TX is $746,998 as of Sep 24, 2026. The likely range is $702,545 to $791,451. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 N Castlegreen Cir, Spring, TX last sell?

18 N Castlegreen Cir, Spring, TX last sold on Jan 29, 1997 for $162,500, according to the county's recorded deed.

How big is 18 N Castlegreen Cir, Spring, TX?

18 N Castlegreen Cir, Spring, TX has 2.5 bathrooms, 2,215 square feet of living space and a 0.20-acre lot.

When was 18 N Castlegreen Cir, Spring, TX built?

18 N Castlegreen Cir, Spring, TX was built in 1996, making it 30 years old. It is a conventional home. The building has 1 story.

What schools serve 18 N Castlegreen Cir, Spring, TX?

18 N Castlegreen Cir, Spring, TX is assigned to Galatas Elementary School (elementary), rated A+; The Woodlands High School (high), rated A+; J.L. McCullough Junior High School (middle), rated A+. All sit in Conroe Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18 N Castlegreen Cir, Spring, TX compare to other homes in Spring 77381?

Among the 12,428 homes in Spring 77381, it is worth more than 67% of them ($746,998 against a typical $595,798), its price per square foot is higher than 94% of them ($337 against a typical $236), it is bigger than 34% of them (2,215 ft² against a typical 2,594 ft²), its lot is bigger than 41% of them (0.2 ac against a typical 0.22 ac) and it is newer than 85% of them (1996 against a typical 1990). Measured against all of Montgomery County, it is worth more than 87% 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 18 N Castlegreen Cir, Spring, TX?

The 2025 property tax bill for 18 N Castlegreen Cir, Spring, TX was $4,065. The county assessed it at $565,293.

More homes on N Castlegreen Cir

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