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Boilers heat much of the country’s older and colder housing through radiators and radiant floors. A replacement boiler costs $4,000 to $10,000 installed in 2026, averaging around $5,750, with efficiency and fuel type driving most of the range.
What you’re paying for
The boiler unit is the biggest line item, followed by labor and any piping or venting changes. Switching to a high-efficiency condensing boiler often means new venting and a condensate drain, which adds to the install. Controls, a thermostat, and permits round out the bill.
Cost by type
Efficiency and fuel set the price. The table below shows typical installed pricing across standard and high-efficiency models and the common fuel types.
Efficiency: how high to go?
Boiler efficiency is rated in AFUE. A high-efficiency condensing boiler (90%+ AFUE) extracts more heat from the same fuel, lowering bills — worth the premium in cold climates with long heating seasons. In milder regions, a standard-efficiency unit may be the better value since the fuel savings take longer to recoup.
Combi or standard?
A combi boiler handles both home heating and on-demand hot water in one unit, freeing up the space a separate water heater would occupy — popular in smaller homes. A standard boiler pairs with a separate water heater or indirect tank. Your home’s layout and hot-water demand decide which fits.
How to save on a boiler
- Match efficiency to your climate instead of automatically buying the top model.
- Get itemized quotes comparing the same type and size.
- Service it annually to maximize lifespan and efficiency.
- Check state and utility rebates for high-efficiency units.
| Item | Typical range | Notes |
|---|---|---|
| Boiler unit | $1,500 – $7,000 | – |
| Installation labor | $1,000 – $3,500 | – |
| Piping & venting | $500 – $2,500 | – |
| Controls & thermostat | $150 – $600 | – |
| Permit | $100 – $500 | When a heating and cooling project needs a permit on Permit Notebook, our sister site |
| Option | Typical range | Notes |
|---|---|---|
| Standard-efficiency | $2,200 – $7,000 | – |
| High-efficiency (condensing) | $4,000 – $10,000 | – |
| Gas boiler | $4,000 – $10,000 | – |
| Oil boiler | $4,800 – $9,000 | – |
| Propane boiler | $2,800 – $7,500 | – |
What affects the price
- Efficiency (AFUE) High-efficiency condensing boilers (90%+ AFUE) cost more upfront but lower fuel use.
- Fuel type Gas, oil, and propane boilers carry different equipment and installation costs.
- Size (BTU) Larger homes need higher-output boilers, which cost more.
- Combi vs. standard A combi boiler provides heat and on-demand hot water in one unit, changing the price and plumbing.
- Piping & venting Switching to a condensing boiler may require new venting and condensate drainage.
Boiler replacement cost by state
Where you live can change the price as much as the options you pick. Labor is a big part of the bill, and construction workers are paid more in some states than others. A typical boiler replacement job costs about $4,700 to $11,700 in Hawaii (17% above the U.S. average). In Arkansas, it costs about $3,400 to $8,500 (15% below the U.S. average).
See the typical cost in all 50 states and D.C.
| State | Typical range |
|---|---|
| Alabama | $3,500 – $8,700 |
| Alaska | $4,600 – $11,500 |
| Arizona | $3,800 – $9,500 |
| Arkansas | $3,400 – $8,500 |
| California | $4,500 – $11,200 |
| Colorado | $4,000 – $10,000 |
| Connecticut | $4,300 – $10,700 |
| Delaware | $3,900 – $9,800 |
| District of Columbia | $4,300 – $10,800 |
| Florida | $3,600 – $9,100 |
| Georgia | $3,700 – $9,200 |
| Hawaii | $4,700 – $11,700 |
| Idaho | $3,800 – $9,400 |
| Illinois | $4,600 – $11,500 |
| Indiana | $4,000 – $10,100 |
| Iowa | $3,900 – $9,700 |
| Kansas | $3,800 – $9,500 |
| Kentucky | $3,700 – $9,300 |
| Louisiana | $3,600 – $9,000 |
| Maine | $3,900 – $9,800 |
| Maryland | $4,000 – $10,000 |
| Massachusetts | $4,600 – $11,500 |
| Michigan | $4,000 – $10,000 |
| Minnesota | $4,400 – $10,900 |
| Mississippi | $3,500 – $8,700 |
| Missouri | $4,100 – $10,200 |
| Montana | $3,900 – $9,800 |
| Nebraska | $3,800 – $9,400 |
| Nevada | $4,100 – $10,300 |
| New Hampshire | $4,000 – $9,900 |
| New Jersey | $4,600 – $11,400 |
| New Mexico | $3,700 – $9,200 |
| New York | $4,400 – $11,000 |
| North Carolina | $3,600 – $9,000 |
| North Dakota | $4,000 – $10,100 |
| Ohio | $4,000 – $10,000 |
| Oklahoma | $3,600 – $9,100 |
| Oregon | $4,400 – $11,000 |
| Pennsylvania | $4,000 – $10,100 |
| Rhode Island | $4,200 – $10,400 |
| South Carolina | $3,600 – $9,100 |
| South Dakota | $3,600 – $9,000 |
| Tennessee | $3,700 – $9,200 |
| Texas | $3,600 – $9,100 |
| Utah | $3,800 – $9,400 |
| Vermont | $3,900 – $9,700 |
| Virginia | $3,800 – $9,500 |
| Washington | $4,600 – $11,600 |
| West Virginia | $3,800 – $9,500 |
| Wisconsin | $4,200 – $10,400 |
| Wyoming | $4,000 – $9,900 |
These are numbers to plan with, not quotes. Each one is this guide's U.S. range, adjusted for what construction workers earn in that state. See every state cost guide or how we estimate.
Common questions
- How much does it cost to replace a boiler?
- Most boiler replacements run $4,000–$10,000 installed, averaging about $5,750. Standard-efficiency units start lower; high-efficiency condensing boilers cost more.
- Boiler vs. furnace — what's the difference?
- A boiler heats water for radiators or radiant floor heat; a furnace heats air blown through ducts. They're different systems — replace like with like unless you're converting the whole heating system.
- Is a high-efficiency boiler worth it?
- In cold climates with heavy heating use, a 90%+ AFUE condensing boiler usually pays back through lower fuel bills. In milder areas the payback is slower.
- How long does a boiler last?
- Boilers last 15–25 years — often longer than forced-air furnaces. Annual servicing extends their life.
- What is a combi boiler?
- A combination (combi) boiler provides both space heating and on-demand domestic hot water from a single unit, saving space by eliminating a separate water heater.
- What are the signs I need a new boiler?
- Age past 15 years, rising heating bills, frequent repairs, uneven heat, leaks, or strange noises all point toward replacement.
How we estimate: These are typical U.S. prices for materials and for hiring a pro to install them. We checked them against the 2026 sources listed below (see how we get our numbers). Your price depends on where you live, the size of the job and the materials you pick. Get two or three written bids before you choose a contractor.
Sources
We checked the prices on this page against 2026 numbers from these sources: