Attic Insulation in Guilford County, NC

Guilford County and Its Homes

Guilford County grew 4 percent from 2020 to 2025, to 562,234 people by the Census Bureau's estimate, in about 238,000 housing units.

Its ten incorporated towns each have a page here: Greensboro, High Point, Summerfield, Gibsonville, Oak Ridge, Stokesdale, Pleasant Garden, Jamestown, Sedalia and Whitsett. About 85 percent of Guilford County's housing units are inside town limits, the rest in unincorporated areas.

Tall historic office building on a tree-lined corner of Elm Street in Greensboro — Elm Street in downtown Greensboro, the Guilford County seat, North Carolina Photo: Warren LeMay from Cullowhee, NC, United States, CC0, via Wikimedia Commons

Guilford County at a Glance

Population: 562,234 (2025), 538,726 (2020)
Housing units: about 238,000
Median year built: 1987 (North Carolina: 1991)
Built before 1980: 41% (statewide: 34%)
Detached houses: 62%
Mobile homes: 3%
Owner-occupied: 60%
Heated with electricity: 54% (statewide: 65%)
Climate zone: 3 (2021 map), 4 (state code)
Towns with pages here: 10

Census Bureau estimates for Guilford County (housing: 2020 to 2024).

Towns and Communities in Guilford County

Greensboro
308,667 people · median home 1985 · Duke Energy
High Point
120,571 people · median home 1989 · its own electric system
Summerfield
11,327 people · median home 2000 · Duke Energy
Gibsonville
9,876 people · median home 2004 · Duke Energy
Oak Ridge
7,896 people · median home 1997 · Duke Energy
Stokesdale
6,133 people · median home 2002 · Duke Energy
Pleasant Garden
5,165 people · median home 1977 · Duke Energy
Jamestown
3,803 people · Duke Energy
Sedalia
691 people · Duke Energy
Whitsett
606 people · median home 1973 · Duke Energy
Burlington
Alamance County town · about 2,600 residents in Guilford County
Kernersville
Forsyth County town · about 600 residents in Guilford County
Archdale
Randolph County town · about 390 residents in Guilford County

Unincorporated communities the Census Bureau maps in Guilford County: Forest Oaks (about 1,700 housing units, median year built 1976) and McLeansville.

What We Do in Guilford County

Attic Insulation in Guilford County
Some 41 percent of Guilford County housing units predate 1980; joists showing above their insulation mean more blown-in fiberglass is due, R-49 from bare.
Attic Insulation Removal in Guilford County
Wet, moldy or animal-soiled insulation comes out of Guilford County attics, and a mouse-soiled Guilford County attic is sanitized and deodorized; in the 18 percent of homes built before 1960, vermiculite is ruled out first.
Air Sealing in Guilford County
Some 54 percent of Guilford County homes heat with electricity, often through attic ducts; their joints and the ceiling's gaps are sealed first.

Homes in Guilford County

Half of Guilford County's 238,000 housing units were built before 1987: 28 percent before 1970, 41 percent before 1980 (nearly all before the state's 1978 insulation rule) and 12 percent in 2010 or later. The largest share went up in the 2000s, under codes that asked for less than ENERGY STAR now suggests; ENERGY STAR notes insulation is often thinnest at the eaves. Among Guilford County towns, the median home is oldest in Whitsett (1973) and newest in Gibsonville (2004).

Guilford County by type: 62 percent detached houses, 29 percent in buildings of two or more homes and 3 percent mobile homes. In Guilford County, 54 percent of homes heat with electricity, 40 percent with piped gas (24 percent statewide) and 3 percent with tank gas.

Guilford County Homes by Year Built

Before 1940: about 14,120 units, 6% (±1)
1940s: about 8,680 units, 4% (±1)
1950s: about 19,550 units, 8% (±1)
1960s: about 23,790 units, 10% (±1)
1970s: about 30,420 units, 13% (±1)
1980s: about 34,540 units, 15% (±1)
1990s: about 37,550 units, 16% (±1)
2000s: about 40,090 units, 17% (±1)
2010s: about 25,610 units, 11% (±1)
2020 or later: about 3,690 units, 2% (±1)

Climate Across Guilford County

NOAA 1991 to 2020 normals for Guilford County towns, by station: Greensboro PTI Airport station (Summerfield, Oak Ridge and Stokesdale): about 3,500 heating and 1,550 cooling degree days; Burlington Fire Station 5 (Gibsonville, Sedalia and Whitsett): about 3,290 heating and 1,650 cooling degree days; Greensboro Water Plant station (Greensboro and Pleasant Garden): about 3,440 heating and 1,570 cooling degree days; High Point station (High Point and Jamestown): about 3,120 heating and 1,710 cooling degree days.

Power and Gas in Guilford County

The card lists Guilford County's town utilities by the territory maps; a power bill confirms the one at an address. The territory map does not split Duke Energy's two North Carolina companies in Guilford County; their programs are the same, and the power bill names the one at an address.

Piedmont Natural Gas holds the Guilford County gas franchise (NC Utilities Commission map), and 40 percent of Guilford County homes heat with piped gas.

Who Supplies Power in Guilford County

Duke Energy: Greensboro, Summerfield, Gibsonville, Oak Ridge, Stokesdale, Pleasant Garden, Jamestown, Sedalia and Whitsett; homes near High Point
High Point's own electric system: High Point
EnergyUnited: homes near Oak Ridge and Stokesdale

Energy Programs for Guilford County Homes

Check each program's current terms for a Guilford County home; some pay only through the utility's contractor network. Insulation Pros is an approved Duke Energy trade ally for Duke's rebate.

Programs for Guilford County

Smart $aver Insulate and Seal (Duke Energy rebate; Greensboro, Summerfield, Gibsonville, Oak Ridge and more).
Home Energy House Call (Duke Energy home assessment; Greensboro, Summerfield, Gibsonville, Oak Ridge and more).
ElectriCities energy audits (ElectriCities member towns; High Point).
Income-qualified Weatherization (Duke Energy income-qualified; Greensboro, Summerfield, Gibsonville, Oak Ridge and more).
Energy Saver North Carolina (statewide income-qualified; any Guilford County address).
Weatherization Assistance Program (statewide income-qualified; any Guilford County address).
High Point's electric utility lists rebates for heat pumps and water heaters, and none for insulation (program page).
Piedmont Natural Gas lists rebates for high-efficiency gas furnaces, and none for insulation or air sealing (program page).

Get Your Free Estimate

or call (336) 870-3893

Guilford County Insulation FAQs

Do you serve all of Guilford County?

Yes: Greensboro, High Point, Summerfield, Gibsonville, Oak Ridge, Stokesdale, Pleasant Garden, Jamestown and two more towns, the parts of Burlington, Kernersville and Archdale inside Guilford County, and every unincorporated Guilford County address.

Which utilities offer insulation rebates in Guilford County?

Duke Energy's Smart $aver Insulate and Seal (Greensboro, Summerfield, Gibsonville, Oak Ridge and more).

Does attic insulation in Guilford County need a permit?

Ask Guilford County Inspections before work starts. For an address in Greensboro, High Point, Summerfield or another Guilford County town, the town or city hall can tell you whether Guilford County's office handles its permits.