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Avery County, North Carolina

USDA's soil survey flags shrink-swell clay on 0% of Avery County's mapped land and a shallow water table under basements on 4%, both below the national shares of 15% and 29%. None of the county is in drought on the October 13, 2026 Drought Monitor map.

FEMA's flood data list 148 flood losses here since 2016, 10% of them in buildings with basements. 35% of homes were built before 1980, against 50% nationally; the median home dates from 1985.

Data as of October 13, 2026 · sources

0%

expansive clay: shrink-swell limits slab homes

4%

high water table: limits basements

0%

in drought, October 13, 2026

35%

of homes built before 1980

Soil under Avery County

Expansive clay (limits slab homes)0.0%
High water table (limits basements)3.8%
Septic fields very limited94.6%
Clay swell (LEP, by area)1.5%
High-swell land (LEP 6%+)0.0%
Mapped soil158,124 acres
Soil seriesShare hereSeries nationally: expansive clay
Porters12%n/a
Chestnut7%n/a
Saunook7%n/a
Unaka7%n/a
Cullasaja6%n/a
Pineola4%n/a
Mitchell County: 0%Watauga County: 0%Carter County: 1%Caldwell County: 0%Yancey County: 0%Burke County: 0%Johnson County: 0%McDowell County: 0%Avery County MitchellWataugaCarterCaldwellYanceyBurkeJohnsonMcDowellAvery
Avery County (heavy outline) and nearby counties, shaded by expansive clay share.under 10%10-25%25-40%40-60%60%+

How we count · survey areas NC011 (2025-09-02)

What the numbers mean here

Rain over the 12 months to August 2026: 41.30 in, 15.18 in below the 1991-2020 average year of 56.48 in.

USDA rates 95% of the land very limited for septic absorption fields.

With shrink-swell clay on 0% and a shallow water table on 4% of the land, the soil survey points to neither problem across most of Avery County; conditions still vary lot by lot.

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 38 of the last 52 weeks; the most was 100% of its area, in 31 weeks, most recently on the August 4, 2026 map.

October 21, 2025Share of area in drought, weeklyOctober 13, 2026
Category, October 13, 2026Share of county
D0 abnormally dry or worse60.5%
D1 moderate drought or worse0%
D2 severe or worse0%
D3 extreme or worse0%
D4 exceptional0%

Flood losses since 2016

148 flood losses since 2016, $12.5 million paid. The worst year was 2024, with 137. Foundations of the buildings, where recorded: 10% basements, 16% slabs, 42% crawl spaces, 32% elevated. Median water depth outside the building: 55.5 in.

YearFlood losses
20160
20170
20182
20192
20200
20217
20220
20230
2024137
20250
2026 to date0

Rain

Average year, 1991-202056.48 in
12 months to August 202641.30 in (-15.18)
202545.83 in (-10.65)
Wettest year since 18952013: 79.52 in
Driest year since 18951925: 36.53 in
Days with 1 inch or more, normal at BOONE 1 SE (18 mi away)15.5

Homes

Housing units14,201
Median year built1985
Built before 198035%
Built 2000 or later22%
Owner-occupied83%
Median value, owner-occupied$265,800
Single-family detached68%

What repairs cost

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

WorkRangeSource
Foundation repair, US $2,200 to $8,200 Fixr, January 27, 2026
Pier-and-beam repair, US $2,000 to $15,000 Fixr, January 27, 2026
Foundation inspection, US $300 to $600 Fixr, January 31, 2025

Nearby counties

PlaceDistanceExpansive clayHigh water table
Mitchell County, NC 14 mi under 1% 2%
Watauga County, NC 16 mi 0% 4%
Carter County, TN 19 mi 1% 1%
Caldwell County, NC 24 mi 0% 6%
Yancey County, NC 25 mi 0% 3%
Burke County, NC 26 mi 0% 2%
Johnson County, TN 27 mi 0% 1%
McDowell County, NC 28 mi 0% 5%

Sources: USDA SSURGO (September 2, 2025) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026) · NOAA (August 2026) · Census ACS 2020-2024. Methods · Data status