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Manassas Park city, Virginia

A shallow water table limits basements on 16% of Manassas Park city's mapped land. Shrink-swell clay limits houses without basements on 0%.

None of the county is in drought on the October 13, 2026 Drought Monitor map. FEMA's flood data list 1 flood losses here since 2016. 25% of homes were built before 1980, against 50% nationally; the median home dates from 1997.

Data as of October 13, 2026 · sources

0%

expansive clay: shrink-swell limits slab homes

16%

high water table: limits basements

0%

in drought, October 13, 2026

25%

of homes built before 1980

Soil under Manassas Park city

Expansive clay (limits slab homes)0.0%
High water table (limits basements)16.4%
Septic fields very limited60.9%
Clay swell (LEP, by area)2.1%
High-swell land (LEP 6%+)0.3%
Urban land, not rated15.3%
Mapped soil1,934 acres
Soil seriesShare hereSeries nationally: high water table
Gaila18%n/a
Arcola16%n/a
Glenelg6%0%
Manassas5%n/a
Nestoria5%n/a
Meadowville5%n/a
Manassas city: 26%Prince William County: 35%Fairfax city: 10%Fairfax County: 33%Falls Church city: 13%Alexandria city: 44%Arlington County: 3%Fauquier County: 28%Manassas Park city Manassas cityPrince WilliamFairfax cityFairfaxFalls Church cityAlexandria cityArlingtonFauquierManassas Park city
Manassas Park city (heavy outline) and nearby counties, shaded by high water table share.under 10%10-25%25-40%40-60%60%+

How we count

What the numbers mean here

On 16% of Manassas Park city's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.

Rain over the 12 months to August 2026: 33.42 in, 8.70 in below the 1991-2020 average year of 42.12 in.

USDA rates 61% of the land very limited for septic absorption fields.

Drought

0% of the county is in drought (D1 or worse) on the October 13, 2026 map. Part of the county was in drought in 42 of the last 52 weeks; the most was 100% of its area, in 41 weeks, most recently on the July 28, 2026 map.

October 21, 2025Share of area in drought, weeklyOctober 13, 2026
Category, October 13, 2026Share of county
D0 abnormally dry or worse0%
D1 moderate drought or worse0%
D2 severe or worse0%
D3 extreme or worse0%
D4 exceptional0%

Flood losses since 2016

1 flood losses since 2016, $4,890 paid. The worst year was 2019, with 1.

YearFlood losses
20160
20170
20180
20191
20200
20210
20220
20230
20240
20250
2026 to date0

Rain

Average year, 1991-202042.12 in
12 months to August 202633.42 in (-8.70)
202531.46 in (-10.66)
Wettest year since 18952003: 62.31 in
Driest year since 18951930: 20.03 in
Days with 1 inch or more, normal at VIENNA (12 mi away)10.2

Homes

Housing units5,569
Median year built1997
Built before 198025%
Built 2000 or later43%
Owner-occupied67%
Median value, owner-occupied$395,900
Single-family detached40%

What repairs cost

Published ranges from cost guides, not quotes. More sources, and where they disagree.

WorkRangeSource
Basement waterproofing, US $3,000 to $10,000 Fixr, February 6, 2026
Sump pump installation, US $800 to $2,000 Fixr, January 31, 2025
Crawl space encapsulation, US $2,000 to $8,000 Fixr, August 29, 2025

Nearby counties

PlaceDistanceExpansive clayHigh water table
Manassas city, VA 3 mi 0% 26%
Prince William County, VA 5 mi 9% 35%
Fairfax city, VA 10 mi 2% 10%
Fairfax County, VA 10 mi 6% 33%
Falls Church city, VA 16 mi 0% 13%
Alexandria city, VA 20 mi 3% 44%
Arlington County, VA 20 mi 0% 3%
Fauquier County, VA 21 mi 6% 28%

Sources: USDA SSURGO (August 5, 2026) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026) · NOAA (August 2026) · Census ACS 2020-2024. Methods · Data status