Average Heating Bill in Delaware → New Castle County
$441/mo
$2,648/year
$1.32/sq ft (oil heat, 2,000 sq ft home)
| Fuel | Local Price | Cost/MMBTU | Annual Cost | Monthly (Heating) |
|---|---|---|---|---|
| Natural Gas | $1.65/therm | $18 | $1,131 | $189 |
| Heat Pump Cheapest | $0.18/kWh | $17 | $1,097 | $183 |
| Heating Oil | $4.90/gallon | $42 | $2,648 | $441 |
| Electric Baseboard | $0.18/kWh | $52 | $3,290 | $548 |
Cheapest option for this area
Heat Pump
$1,097/year estimated — saving $1,551/year vs heating oil
Average monthly heating costs during the October–March season for a 2,000 sq ft home in New Castle County:
Based on a 2,000 sq ft home with 85% oil furnace efficiency, COP 3.0 heat pump, NOAA 30-year normal heating degree days (4,546 HDD for New Castle County), and current EIA state-average energy rates. Oil prices reflect local median from 4 tracked suppliers.
Data updated 2026-07-17.
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If you're staying with oil heat, compare local suppliers to find the best price. The spread in New Castle County can be $0.50–$1.00/gallon.
Median: $4.90/gal · 4 suppliers reporting prices
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