Data-driven insights for local properties

ZIP Code 77521

18,588 properties in this area

Browse Streets by Letter

Click a letter to see all streets starting with that letter

A898B1,543C2,220D323E952F528G912H1,256I323J262K248L631M1,232N585O282P949Q93R1,031S2,382T638U12V122W1,081Y26Z37

77521 Summary Statistics

Flood risk, pollution data, and real estate statistics for this area

Area Overview

The majority of properties (97%) sit in FEMA Zone X with minimal flood risk. At an average elevation of 29.1 feet above sea level, this is a low-lying area for the Houston region. Properties here have moderate pollution levels compared to the Houston metro, though 47% are near industrial carcinogen sources.

Flood Risk Summary

FEMA Flood Zones

FEMA designates flood zones based on flood risk. Flood insurance is required for high-risk zones with federally backed mortgages.

XMinimal Risk17,970 (96.7%)

Outside 100-year floodplain. Flood insurance optional but recommended.

AEHigh Risk617 (3.3%)

1% annual flood chance with base flood elevations. Insurance required.

AHigh Risk1 (0.0%)

1% annual flood chance. Flood insurance required for federally backed mortgages.

Flood Risk Level

Our flood risk assessment combines FEMA flood zone, elevation, and proximity to bayous into a single rating.

Very Low17,968
96.7%
Moderate597
3.2%
High16
0.1%
Very High7
0.0%
Average Ground Elevation29.1 ftAbove sea level. Higher elevation generally means lower flood risk.

Pollution Summary

Based on EPA Toxics Release Inventory (TRI) data. TRI tracks industrial facilities that release toxic chemicals into air, water, or land.

Pollution Exposure Level51.6/100(Moderate)Higher = more pollution exposure from nearby industrial facilities.
Properties Near Carcinogen Sources47%Within 2 miles of facilities releasing known carcinogens.
Properties Near PBT Sources53.2%PBTs (Persistent Bioaccumulative Toxics) accumulate in the environment and food chain.
Avg. TRI Facilities Nearby2.3Average number of TRI-reporting industrial facilities within 2 miles of properties.

Real Estate Summary

Based on 2025 Harris County Appraisal District (HCAD) data for residential properties.

Property Values

Median Home Value$246,366
Average Home Value$286,020
Year-over-Year Change+4.25%

Home Characteristics

Average Home Size2,385 sq ft
Average Lot Size16,195 sq ft
Average Year Built1994

Based on 16,028 residential properties in this ZIP code.

Home Age Distribution

Before 1950366
2.3%
1950-19692,029
12.5%
1970-19894,082
25.2%
1990-20094,474
27.7%
2010+5,221
32.3%

Property Types

Real, Residential, Single-Family15,739 (71%)
Real, Vacant Lots/Tracts (Not in City)1,388 (6.3%)
Personal Prop. Mobile Home1,347 (6.1%)
Other Exempt (Government)970 (4.4%)
Real, Commercial909 (4.1%)

Recent Permits (Last 5 Years)

New Dwelling - permit1,667
New Dwelling - no permit431
Additions or Remodeling287
Repairs (Foundation / GM)259
Extra Features (OB&Y)195

New Construction

Properties with New Construction483
Total New Construction Value$72,263,995
Browse 77521 streets by letter:
ABCDEFGHIJKLMNOPQRSTUVWYZ