Why Connecticut Homeowners Are Converting from Oil to Gas
If your home in Stamford, Greenwich, Darien, or anywhere in Fairfield County still runs on oil heat, you're not alone — but you're in a shrinking group. Over the past decade, thousands of CT homeowners have made the switch to natural gas, and for good reason: lower fuel costs, less maintenance, no more worrying about oil deliveries, and a smaller carbon footprint.
As licensed HVAC contractors who've handled hundreds of oil-to-gas conversions across Fairfield County CT and Westchester County NY, we're going to walk you through exactly what the process involves, what it costs, and whether it makes sense for your home.
What Does an Oil-to-Gas Conversion Actually Involve?
An oil-to-gas conversion isn't just swapping one piece of equipment for another. Here's the full scope:
- Gas line connection — If your street has a natural gas main (most of Fairfield County does), Eversource or your local utility will run a gas line to your home. This is often free or heavily subsidized.
- New heating equipment — Your oil boiler or furnace gets replaced with a gas-fired unit. We install high-efficiency condensing boilers (95%+ AFUE) from Navien, Weil-McLain, and Burnham.
- Oil tank removal — Your existing oil tank (usually in the basement or buried underground) needs to be professionally decommissioned and removed. Underground tanks require soil testing.
- Gas piping — Interior gas piping from your meter to the new equipment, plus any other gas appliances (water heater, stove, dryer).
- Permits and inspections — CT requires permits for gas work. We handle all of this.
Oil-to-Gas Conversion Costs in Connecticut
Here's what you can expect to pay in the Fairfield County / Westchester County market:
| Component | Cost Range | Notes |
|---|---|---|
| Gas boiler (installed) | $6,500 – $14,000 | Depends on size, brand, efficiency |
| Gas furnace (installed) | $4,500 – $10,000 | If you have ductwork |
| Interior gas piping | $800 – $2,500 | Distance from meter to equipment |
| Oil tank removal (indoor) | $500 – $1,500 | Straightforward basement tanks |
| Oil tank removal (underground) | $1,500 – $4,000+ | Includes soil testing |
| Gas line from street | Often FREE | Utility typically covers this |
| Total project | $8,000 – $22,000 | Most homes: $10,000 – $16,000 |
Want an exact number? We provide free, no-obligation estimates for oil-to-gas conversions. Call (866) 203-0469 or request a quote online.
Annual Savings: Oil vs. Natural Gas
The biggest motivator for most homeowners is the ongoing savings. Here's a realistic comparison for a typical 2,500 sq ft home in Connecticut:
| Factor | Oil Heat | Natural Gas |
|---|---|---|
| Annual fuel cost | $2,800 – $4,200 | $1,400 – $2,200 |
| Annual maintenance | $300 – $500 | $100 – $200 |
| Equipment efficiency | 80 – 87% AFUE | 92 – 98% AFUE |
| Annual total | $3,100 – $4,700 | $1,500 – $2,400 |
| Annual savings | $1,200 – $2,300 per year | |
At those savings, most conversions pay for themselves in 5–8 years. And you're getting brand-new, reliable equipment with a 10–15 year warranty.
Is Natural Gas Available on Your Street?
In Fairfield County, natural gas availability is extensive but not universal. Most of Stamford, Greenwich, Norwalk, and Darien have gas mains. Some parts of New Canaan, Westport, and northern Fairfield County may not.
If your street doesn't have a gas main, you have two alternatives: propane conversion (similar equipment, different fuel source) or a heat pump system that runs on electricity. Both are legitimate options we install regularly.
What About Rebates?
Connecticut offers significant incentives for converting from oil to gas:
- Energize CT / Eversource — Up to $750 rebate for high-efficiency gas heating equipment
- Federal IRA tax credits — Up to $2,000 for qualifying heat pump installations, $600 for high-efficiency gas furnaces/boilers
- Utility gas line subsidies — Eversource often covers the cost of running a gas line to your home
The Bottom Line
If your home has access to natural gas and your oil equipment is more than 15 years old, conversion almost always makes financial sense. You'll save $1,200–$2,300 per year on fuel, eliminate oil deliveries and tank maintenance, and get modern equipment that's cleaner, quieter, and more reliable.
The best time to convert is before your oil system fails — not during a January cold snap when you're under pressure to make a quick decision.
Need HVAC help in Fairfield County CT or Westchester County NY? Call (866) 203-0469 or get a free estimate online.