Electric companies in Charleston County, South Carolina
Charleston County, SC ranks 1st of 46 South Carolina counties for hurricane risk, FEMA score 99.6. Charleston County, SC has 414,711 residents. Charleston County, SC: 2 utilities listed by EIA. Charleston County, SC: home electricity prices of 14.59 to 14.93 cents per kWh.
Charleston County, SC on the map
Charleston County, SC darker: more storm events
Outage risk in Charleston County, SC
Charleston County, SC, NWS storm events 2015 to 2025: 285 in all, 68.7 per 100,000 residents of 414,711, rank 5 of 46 South Carolina counties. Property damage in Charleston County, SC: $1.7M.
Events by year in Charleston County, SC
events a year, Charleston County, SC
- 64'15
- 34'16
- 18'17
- 17'18
- 43'19
- 22'20
- 5'21
- 28'22
- 16'23
- 19'24
- 19'25
Events by type
| Charleston County, SC | FEMA | Score | Rank | Events | Peak | Damage |
|---|---|---|---|---|---|---|
| Charleston County, SC, thunderstorm and high wind | Relatively Moderate | 82.5 | 15 of 46 | 264 | 2015 (63) | $205K |
| Charleston County, SC, tornado | Relatively Moderate | 71.0 | 27 of 46 | 21 | 2024 (9) | $1.5M |
| Charleston County, SC, hurricane and tropical storm | Very High | 99.6 | 1 of 46 | 0 | none | $0 |
| Charleston County, SC, ice storm | Relatively High | 94.5 | 7 of 46 | 0 | none | $0 |
| Charleston County, SC, winter storm and heavy snow | Relatively Moderate | 84.2 | 3 of 46 | 0 | none | $0 |
| Charleston County, SC, heat wave | Relatively Moderate | 82.7 | 9 of 46 | 0 | none | $0 |
ZIP codes in Charleston County, SC
- 29401
- 29403
- 29404
- 29405
- 29406
- 29407
- 29409
- 29412
- 29414
- 29418
- 29420
- 29424
- 29425
- 29426
- 29429
- 29438
- 29439
- 29449
- 29451
- 29455
- 29456
- 29458
- 29464
- 29466
- 29470
- 29482
- 29487
Electric utilities in Charleston County, SC
| Utility listed for Charleston County, SC | Type | Home price ¢/kWh | Yearly bill at 1,050 kWh | Share of Charleston County, SC median income of $84,320 |
|---|---|---|---|---|
| Dominion Energy South Carolina, Inc in Charleston County, SC | Investor Owned | 14.59 | $1,839 | 2.18% |
| Berkeley Electric Coop Inc in Charleston County, SC | Cooperative | 14.93 | $1,883 | 2.23% |
Prices are statewide utility averages, not a county price.
Facts about Charleston County, SC
- Residents of Charleston County, SC, ACS 2023
- 414,7113 of 46 South Carolina counties
- Households in Charleston County, SC
- 175,4992.36 people each
- Owner-occupied homes in Charleston County, SC
- 63.5%111,425 owner and 64,074 renter households
- Median household income in Charleston County, SC
- $84,3202 of 46 South Carolina counties
- Housing units in Charleston County, SC
- 206,29930,800 vacant or seasonal, 14.9% of the units
- Homes heated by electricity in Charleston County, SC
- 76.6%134,419 homes, 22 of 46 South Carolina counties
- Utilities listed for Charleston County, SC
- 22 with a home price: Dominion Energy South Carolina, Inc, Berkeley Electric Coop Inc
- Lowest home price in Charleston County, SC
- 14.59 ¢/kWhDominion Energy South Carolina, Inc, 2.3% below the highest
- Highest home price in Charleston County, SC
- 14.93 ¢/kWhBerkeley Electric Coop Inc
- Monthly bill gap in Charleston County, SC
- $4between the two at 1,050 kWh, $44 a year, 0.05% of the Charleston County, SC median income
- ZIP areas touching Charleston County, SC
- 2729401 to 29487
- Outage-linked storm events in Charleston County, SC
- 285NWS storm events, 2015 to 2025
- Homes built before 1980 in Charleston County, SC
- 35.3%median year built 1991
- Flood claims in Charleston County, SC
- 6,064NFIP 2015 to 2025, $116.1M paid
- Home energy burden in Charleston County, SC
- 1.8%$1,836 a year on electricity (DOE LEAD)
Electricity price since 2015 in Charleston County, SC
Dominion Energy South Carolina, Inc charged Charleston County, SC homes 14.41 ¢/kWh in 2015. Charleston County, SC: 14.59 ¢ in 2024, 1% up. Charleston County, SC: against 13% up for the South Carolina average.
Charleston County, SC: a 1,050 kWh month at that price. Charleston County, SC: $151 in 2015, $153 in 2024. Charleston County, SC: $1,839 a year, 2.2% of the $84,320 median income.
Charleston: 10 yearly prices
| Year | Dominion Energy South Carolina, Inc, Charleston County, SC | Charleston: Gap to South Carolina average | Charleston: Gap to U.S. average |
|---|---|---|---|
| 2015, Charleston | 14.41 | +1.84 | +1.76 |
| 2016, Charleston | 14.56 | +1.91 | +2.01 |
| 2017, Charleston | 15.12 | +2.10 | +2.23 |
| 2018, Charleston | 13.02 | +0.58 | +0.15 |
| 2019, Charleston | 14.30 | +1.31 | +1.29 |
| 2020, Charleston | 13.45 | +0.67 | +0.30 |
| 2021, Charleston | 14.66 | +1.80 | +1.00 |
| 2022, Charleston | 16.22 | +2.63 | +1.18 |
| 2023, Charleston | 14.41 | +0.73 | -1.59 |
| 2024, Charleston | 14.59 | +0.36 | -1.89 |
Charleston County, SC: EIA-861 home prices, 2015 to 2024, not a Charleston County, SC price.
CSVHousing and heating in Charleston County, SC
Charleston County, SC: 72,804 of 206,299 homes were built before 1980 and 76,534 in 2000 or later. Charleston County, SC has 119,948 detached houses, 48,430 homes in 5+ unit buildings, 10,217 mobile homes, and 64,074 of 175,499 households rent.
Age of homes in Charleston County, SC
% of homes by decade built, Charleston County, SC
- 5pre-40
- 340s
- 650s
- 960s
- 1170s
- 1480s
- 1490s
- 1700s
- 1810s
- 220+
Heating fuel in Charleston County, SC
| Charleston County, SC | Value | State median | Gap | Rank (1 = highest) |
|---|---|---|---|---|
| Charleston County, SC, median year built | 1991 | 1987 | +4 years | 10 of 46 |
| Charleston County, SC, built before 1980 | 35.3% | 39.7% | -4.4 points | 34 of 46 |
| Charleston County, SC, built 2000 or later | 37.1% | 24.0% | +13.1 points | 8 of 46 |
| Charleston County, SC, detached houses | 58.1% | 64.6% | -6.5 points | 35 of 46 |
| Charleston County, SC, apartments in 5+ unit buildings | 23.5% | 4.4% | +19.1 points | 2 of 46 |
| Charleston County, SC, mobile homes | 5.0% | 22.4% | -17.5 points | 45 of 46 |
| Charleston County, SC, renter households | 36.5% | 26.6% | +10.0 points | 5 of 46 |
| Charleston County, SC, median home value | $450,800 | $158,600 | +$292,200 | 1 of 46 |
| Charleston County, SC, median gross rent a month | $1,506 | $878 | +$628 | 2 of 46 |
| Charleston County, SC, people per household | 2.30 | 2.46 | -0.16 | 42 of 46 |
Cost of living with electricity in Charleston County, SC
Charleston County, SC: electricity $1,836 a year per home (DOE LEAD), all home energy $2,095, 1.8% of $115,105 income. 171,795 households in Charleston County, SC spend about $315.4 million a year on electricity and $359.9 million on all home energy. Lower-income homes in Charleston County, SC ($17,199 a year) spend 10.4% of income, 5.7 times the all-home figure.
Energy burden in Charleston County, SC
| Charleston County, SC | Homes | Income | Power | Gas | Other | Burden |
|---|---|---|---|---|---|---|
| Charleston County, SC, all households | 171,795 | $115,105 | $1,836 | $248 | $11 | 1.8% |
| Charleston County, SC, lower income | 35,699 | $17,199 | $1,641 | $146 | $5 | 10.4% |
| Charleston County, SC, owners | 108,650 | $143,857 | $2,116 | $357 | $16 | 1.7% |
| Charleston County, SC, renters | 63,145 | $65,633 | $1,354 | $61 | $2 | 2.2% |
Flood claims and flood insurance in Charleston County, SC
Charleston County, SC: 6,064 NFIP flood claims in 2015 to 2025, $116.1M paid, median paid claim $13,231.
46,856 of 148,009 residential structures in Charleston County, SC carry an NFIP contract. 59,986 NFIP policies of any type were in force in Charleston County, SC on 8 Sep 2026. Charleston County, SC lists 1,245 repetitive-loss properties, 177 of them severe repetitive loss.
Charleston County, SC: claims history, not an outage count.
Flood claims by year in Charleston County, SC
flood claims a year, Charleston County, SC
- 2,111'15
- 1,463'16
- 1,579'17
- 119'18
- 63'19
- 86'20
- 41'21
- 141'22
- 295'23
- 142'24
- 24'25
| Charleston County, SC | Value | Median county | Rank (1 = highest) |
|---|---|---|---|
| Charleston County, SC, claims 2015-2025 | 6,064 | — | 1 of 39 |
| Charleston County, SC, paid 2015-2025 | $116.1M | — | 2 of 39 |
| Charleston County, SC, median paid claim | $13,231 | — | — |
| Charleston County, SC, claims per 1,000 homes | 41.0 | 2.4 | 3 of 39 |
| Charleston County, SC, homes with flood insurance | 31.7% | 0.5% | 2 of 46 |
| Charleston County, SC, policies in force | 59,986 | — | — |
| Charleston County, SC, repetitive-loss properties | 1,245 | — | — |
Charleston County, SC: OpenFEMA NFIP, claims as of 8 Sep 2026, insured share as of 3 Aug 2026; counts under 5 are hidden.
Charleston County, SC: flood claims by state, flood hub.
Climate and electric heating in Charleston County, SC
Charleston County, SC totals 1,935 heating degree days and 2,320 cooling degree days a year (1991-2020 normal).
For heating, Charleston County, SC is the 44th coldest of 46 counties in South Carolina: 1,935 against a median of 2,581. For cooling, Charleston County, SC is the 3rd hottest: 2,320 against a median of 1,995.
Charleston County, SC sits between climates, 385 degree days separate heating and cooling.
Charleston County, SC: 2,483 cooling degree days in 2016-2025, 2,320 on the normal, 7% over.
Charleston County, SC: electricity heats 76.6% of 175,499 homes; the winter totals 1,935 heating degree days.
| Charleston County, SC | Value | SC median county | Charleston County, SC, rank (1 = highest) |
|---|---|---|---|
| Charleston County, SC, heating degree days, 1991-2020 normal | 1,935 | 2,581 | 44 of 46 |
| Charleston County, SC, heating degree days, 2016-2025 mean | 1,703 | 2,274 | 44 of 46 |
| Charleston County, SC, cooling degree days, 1991-2020 normal | 2,320 | 1,995 | 3 of 46 |
| Charleston County, SC, cooling degree days, 2016-2025 mean | 2,483 | 2,160 | 3 of 46 |
| Charleston County, SC, electric heating, ACS 2019-2023 | 76.6% | 75.0% | 22 of 46 |
Charleston County, SC: ACS B25040, 175,499 homes; NOAA nClimDiv, retrieved 7 Oct 2026.
Analyst note on Charleston County, SC
Charleston County, SC touches 27 ZIP areas, 29401 to 29487, about 15,360 residents each. Charleston County, SC counts 414,711 residents in 175,499 households. Household income in Charleston County, SC is $84,320; 111,425 of its 175,499 households own.
134,419 of the 175,499 homes in Charleston County, SC heat with electricity. Charleston County, SC has 206,299 housing units, 30,800 (14.9%) vacant or seasonal, and 64,074 rented homes. Charleston County, SC logged 285 storm events for its 414,711 residents.
The median home in Charleston County, SC dates from 1991. Homes in Charleston County, SC pay $1,836 a year for electricity. Charleston County, SC home electricity prices run Dominion Energy South Carolina, Inc to Berkeley Electric Coop Inc, $4 a month apart at 1,050 kWh.
Bill and heat pump calculator, Charleston County, SC
Compare Charleston County, SC with its neighbours
- Berkeley County sits 20 miles north of Charleston County, SC, with 238,723 residents against 414,711 there, 196 storm events against 285, median home built 2000 against 1991, energy burden 2.1% against 1.8%, income $82,327 against $84,320.
- Dorchester County sits 26 miles northwest of Charleston County, SC, with 164,322 residents against 414,711 there, 262 storm events against 285, median home built 1999 against 1991, energy burden 2.4% against 1.8%, income $76,896 against $84,320.
- Colleton County sits 36 miles west of Charleston County, SC, with 38,623 residents against 414,711 there, 631 storm events against 285, median home built 1988 against 1991, energy burden 4.2% against 1.8%, income $48,779 against $84,320.
- Williamsburg County sits 56 miles north of Charleston County, SC, with 30,517 residents against 414,711 there, 50 storm events against 285, median home built 1985 against 1991, energy burden 4.5% against 1.8%, income $43,471 against $84,320.
- Clarendon County sits 57 miles north of Charleston County, SC, with 31,037 residents against 414,711 there, 126 storm events against 285, median home built 1989 against 1991, energy burden 3.4% against 1.8%, income $48,887 against $84,320.
Cities in Charleston County, SC
- Charleston electricity rates152,014 residents
- North Charleston electricity rates117,460 residents
- Mount Pleasant electricity rates92,662 residents
South Carolina: home prices since 2001, planned plants.
Questions on Charleston County, SC
Charleston County, SC: what do homes pay for electricity?
Charleston County, SC homes paid 14.59 to 14.93 cents per kWh in 2024 across 2 listed utilities: $153 to $157 a month at 1,050 kWh, 2.18% to 2.23% of Charleston County, SC income.
Charleston County, SC: how many homes heat with electricity?
Charleston County, SC: 134,419 of 175,499 occupied homes, 76.6%, rank 22 of 46.
Charleston County, SC: median household income?
$84,320 in Charleston County, SC, rank 2 of 46; 414,711 residents, 175,499 households.
Charleston County, SC: outage-linked storms since 2015?
Charleston County, SC: 285 NWS events, peak year 2015.
Charleston County, SC: flood insurance claims since 2015?
Charleston County, SC: 6,064 NFIP flood claims, $116.1M paid, 41.0 per 1,000 homes, 31.7% of homes insured.
How old are the homes in Charleston County, SC?
Charleston County, SC: median home built 1991; 35.3% predate 1980, 58.1% detached, 23.5% in 5+ unit buildings.
Charleston County, SC: share of income for energy?
Charleston County, SC homes spend $1,836 a year on electricity, $2,095 on all energy: 1.8% of $115,105; 10.4% for lower incomes.