Data-driven insights for local properties

ZIP Code 77520

12,384 properties in this area

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77520 Summary Statistics

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

Area Overview

The majority of properties (93%) sit in FEMA Zone X with minimal flood risk. At an average elevation of 23.1 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, with 65% within 2 miles of facilities releasing known carcinogens.

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 Risk11,517 (93.0%)

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

AEHigh Risk585 (4.7%)

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

VEHigh (Coastal) Risk278 (2.2%)

Coastal flooding with wave action. Insurance required.

AOHigh Risk4 (0.0%)

Shallow flooding 1-3 ft from rivers/streams. Insurance required.

Flood Risk Level

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

Very Low11,531
93.1%
Moderate500
4.0%
High154
1.2%
Very High199
1.6%
Average Ground Elevation23.1 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 Level61.7/100(Moderate)Higher = more pollution exposure from nearby industrial facilities.
Properties Near Carcinogen Sources64.9%Within 2 miles of facilities releasing known carcinogens.
Properties Near PBT Sources65.4%PBTs (Persistent Bioaccumulative Toxics) accumulate in the environment and food chain.
Avg. TRI Facilities Nearby3Average 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$162,751
Average Home Value$201,861
Year-over-Year Change+4.08%

Home Characteristics

Average Home Size1,970 sq ft
Average Lot Size13,278 sq ft
Average Year Built1957

Based on 9,517 residential properties in this ZIP code.

Home Age Distribution

Before 19503,497
35.9%
1950-19694,331
44.5%
1970-1989981
10.1%
1990-2009488
5%
2010+434
4.5%

Property Types

Real, Residential, Single-Family9,182 (66.5%)
Real, Vacant Lots/Tracts (In City)943 (6.8%)
Real, Commercial894 (6.5%)
Other Exempt (Government)892 (6.5%)
Real, Vacant Commercial631 (4.6%)

Recent Permits (Last 5 Years)

Additions or Remodeling432
Repairs (Foundation / GM)209
Disaster Review150
Extra Features (OB&Y)141
New Dwelling - permit133

New Construction

Properties with New Construction163
Total New Construction Value$11,448,846
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