Alleghany County and Its Homes
Alleghany County grew 5 percent from 2020 to 2025, to 11,479 people by the Census Bureau's estimate, in about 7,800 housing units.
Its one incorporated town, Sparta, has a page here. About 15 percent of Alleghany County's housing units are inside town limits, the rest in unincorporated areas.
Alleghany County at a Glance
- Population: 11,479 (2025), 10,891 (2020)
- Housing units: about 7,800
- Median year built: 1980 (North Carolina: 1991)
- Built before 1980: 51% (statewide: 34%)
- Detached houses: 77%
- Mobile homes: 17%
- Owner-occupied: 74%
- Heated with electricity: 50% (statewide: 65%)
- Climate zone: 5 on both maps
- Towns with pages here: 1
Census Bureau estimates for Alleghany County (housing: 2020 to 2024).
Towns in Alleghany County
Sparta
1,918 people · median home 1970 · Blue Ridge Energy
What We Do in Alleghany County
Attic Insulation in Alleghany County
Some 51 percent of Alleghany County housing units predate 1980; joists showing above their insulation mean more blown-in fiberglass is due, R-60 from bare.
Attic Insulation Removal in Alleghany County
Wet, moldy or animal-soiled insulation comes out of Alleghany County attics, and a mouse-soiled Alleghany County attic is sanitized and deodorized; in the 17 percent of homes built before 1960, vermiculite is ruled out first.
Air Sealing in Alleghany County
Some 50 percent of Alleghany County homes heat with electricity, often through attic ducts; their joints and the ceiling's gaps are sealed first.
Homes in Alleghany County
Half of Alleghany County's 7,800 housing units were built before 1980: 32 percent before 1970, 51 percent before 1980 (nearly all before the state's 1978 insulation rule) and 7 percent in 2010 or later (16 percent statewide). The largest share went up in the 1970s; fiberglass from those years may have settled, so check its depth against the joists. Sparta's median home dates from 1970, 10 years older than Alleghany County's as a whole.
Only about 5,200 of Alleghany County's 7,800 housing units were someone's usual home in the Census Bureau's 2020 to 2024 survey; the heating shares below describe those households. Alleghany County by type: 77 percent detached houses, 6 percent in buildings of two or more homes and 17 percent mobile homes. In Alleghany County, 50 percent of households heat with electricity, 15 percent with tank gas (6 percent statewide), 22 percent with oil or kerosene (2 percent statewide) and 9 percent with wood (1 percent statewide).
Alleghany County Homes by Year Built
- Before 1940: about 390 units, 5% (±2)
- 1940s: about 400 units, 5% (±2)
- 1950s: about 530 units, 7% (±2)
- 1960s: about 1,170 units, 15% (±3)
- 1970s: about 1,470 units, 19% (±3)
- 1980s: about 940 units, 12% (±3)
- 1990s: about 1,310 units, 17% (±3)
- 2000s: about 1,050 units, 13% (±3)
- 2010s: about 410 units, 5% (±2)
- 2020 or later: about 140 units, 2% (±1)
Climate Across Alleghany County
NOAA 1991 to 2020 normals for Alleghany County towns, by station: Sparta 3.5 SSW station (Sparta): about 5,150 heating and 650 cooling degree days. NOAA's Transou station, 13 miles from Sparta, has about 5,630 heating and 320 cooling degree days.
Power and Gas in Alleghany County
The card lists Alleghany County's town utilities by the territory maps; a power bill confirms the one at an address.
Alleghany County has no natural gas franchise on the NC Utilities Commission's map.
Who Supplies Power in Alleghany County
- Blue Ridge Energy: Sparta
Energy Programs for Alleghany County Homes
Check each program's current terms for an Alleghany County home; some pay only through the utility's contractor network.
Programs for Alleghany County
- Weatherization Rebates (Smart Rebates) (Blue Ridge Energy; Sparta): air sealing, duct sealing and insulation rebates.
- Energy Saver North Carolina (statewide income-qualified; any Alleghany County address).
- Weatherization Assistance Program (statewide income-qualified; any Alleghany County address).
Alleghany County Insulation FAQs
Do you serve all of Alleghany County?
Yes: Sparta and every unincorporated Alleghany County address.
Which utilities offer insulation rebates in Alleghany County?
Blue Ridge Energy's Weatherization Rebates (Smart Rebates) (Sparta).
Does attic insulation in Alleghany County need a permit?
Ask Alleghany County Planning & Inspection before work starts. For an address in Sparta, the town or city hall can tell you whether Alleghany County's office handles its permits.
Is there natural gas in Alleghany County?
Not from a gas utility: the NC Utilities Commission's map shows no franchise for Alleghany County.
Counties Near Alleghany County
Wilkes County · Ashe County · Surry County · Yadkin County · Watauga County · All service areas
Alleghany County, NC
Open in Google Maps (opens in a new tab)Insulation Pros in Alleghany County
An insulation contractor serving North Carolina, Alleghany County included.
Send the square footage of your Alleghany County attic, or call (336) 870-3893.