Average Heating Bill in Connecticut → Fairfield County
$472/mo
$2,829/year
$1.41/sq ft (oil heat, 2,000 sq ft home)
| Fuel | Local Price | Cost/MMBTU | Annual Cost | Monthly (Heating) |
|---|---|---|---|---|
| Natural Gas Cheapest | $1.89/therm | $20 | $1,608 | $268 |
| Heat Pump | $0.30/kWh | $30 | $2,361 | $393 |
| Heating Oil | $4.20/gallon | $36 | $2,829 | $472 |
| Electric Baseboard | $0.30/kWh | $89 | $7,083 | $1,180 |
Cheapest option for this area
Natural Gas
$1,608/year estimated — saving $1,221/year vs heating oil
Average monthly heating costs during the October–March season for a 2,000 sq ft home in Fairfield 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 (5,665 HDD for Fairfield County), and current EIA state-average energy rates. Oil prices reflect local median from 14 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 Fairfield County can be $0.50–$1.00/gallon.
Median: $4.20/gal · 14 suppliers reporting prices
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