Data-driven insights for local properties

ZIP Code 77021

10,232 properties in this area

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77021 Summary Statistics

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

Area Overview

The majority of properties (99%) sit in FEMA Zone X with minimal flood risk. At an average elevation of 40 feet above sea level, this is a moderate elevation area for the Houston region. Properties here have moderate pollution levels compared to the Houston metro, with 100% 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 Risk10,099 (98.7%)

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

AEHigh Risk133 (1.3%)

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

Flood Risk Level

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

Very Low10,099
98.7%
Moderate133
1.3%
Average Ground Elevation40 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 Level56.5/100(Moderate)Higher = more pollution exposure from nearby industrial facilities.
Properties Near Carcinogen Sources100%Within 2 miles of facilities releasing known carcinogens.
Properties Near PBT Sources95.1%PBTs (Persistent Bioaccumulative Toxics) accumulate in the environment and food chain.
Avg. TRI Facilities Nearby5.4Average 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$208,200
Average Home Value$341,713
Year-over-Year Change+7.6%

Home Characteristics

Average Home Size2,581 sq ft
Average Lot Size7,755 sq ft
Average Year Built1967

Based on 7,545 residential properties in this ZIP code.

Home Age Distribution

Before 19502,309
29.5%
1950-19693,230
41.2%
1970-198999
1.3%
1990-2009709
9%
2010+1,488
19%

Property Types

Real, Residential, Single-Family7,551 (66.5%)
Real, Vacant Lots/Tracts (In City)1,819 (16%)
Real, Commercial606 (5.3%)
Other Exempt (Government)414 (3.6%)
Real, Vacant Commercial389 (3.4%)

Recent Permits (Last 5 Years)

New Dwelling - permit916
Additions or Remodeling599
Residential Demolition211
Repairs (Foundation / GM)205
Extra Features (OB&Y)76

New Construction

Properties with New Construction451
Total New Construction Value$74,537,362
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