How Much Does Boiler Replacement Cost in Boston? [2025 Data]

You’ll spend an average of $4,339 on boiler replacement costs in Boston, Massachusetts, with most projects totaling $2,454 to $6,723. Your final cost will depend on a few factors, including the size of your home, the type of fuel, and your HVAC contractor’s fees. Explore how much you should budget for a new boiler in Boston to keep yourself toasty all winter long.

Boiler Replacement Cost Factors 

In Boston, Massachusetts, the total cost of a new boiler primarily depends on its size and type, as well as its system type. Here’s how those factors affect your budget.

Size

You can estimate the cost of your boiler by your home’s square footage and boiler capacity using the table below. However, call an HVAC pro in Boston, Massachusetts, for the most accurate estimate.

Fuel Type

The most common fuels used for boilers in Boston, Massachusetts, are natural gas, propane, and oil. The fuel type you choose will have a major impact on both your ongoing costs and how much you pay for a new boiler.

• Oil boiler: Oil burns hotter than gas, so oil boilers provide more heat and are better in colder climates. However, oil boilers require more maintenance than gas options, so keep things like long-term maintenance costs in mind before buying. 

• Gas and propane boiler: Propane and natural gas are common options for heating homes. In addition to the unit price, installation costs $1,000 to $3,000 and requires new exhaust lines, drains, and fuel lines.

• Electric: Electric boilers are highly efficient and don't require some of the components that gas and oil boilers need, like exhaust vents. They take a long time to heat up but are an attractive option for tiny homes in warm climates.

• Wood: Large, outdoor, wood-fueled boilers are good options for rural areas that have easy access to wood. 

System Type

Boilers are broken out by fuel type, but they can also vary in other ways—like their system types.

• Standard or conventional boilers: These boilers work by quickly heating water in pipes and sending it to your taps. Standard units are one of the most popular choices for homeowners in large homes and those with floor heating systems. 

• Combination boilers: Combination boilers are popular because they’ll give you access to hot water quickly. However, the supply tends to be limited due to the lack of a storage tank. 

• System boilers: These work by keeping high-pressure hot water in a sealed cylinder, where it can be sent to multiple taps within your home simultaneously. 

• High-efficiency boilers: High-efficiency boilers are up to 98% efficient, which accounts for thousands of dollars in savings over the boiler's life. Standard boilers are around 80% efficient, making them ideal for cold climates.

Climate Zone

The capacity of your boiler (in BTUs) depends on your region and climate. Warmer climates make it much easier to heat water, even for larger houses, so fewer BTUs are required. You can estimate your necessary BTUs by finding out which climate zone you live in. 

HVAC Pro Costs

In addition to the boiler’s specifics and your climate zone, there are a handful of other factors to be aware of when planning a boiler replacement. Here’s what you should know.

Licensing and Certification

If you’re planning to replace a boiler in your Boston home, be sure to hire a qualified HVAC professional for the job. While there’s no city or state licensing program for HVAC technicians, the Commonwealth of Massachusetts requires all pros who service, install, or repair oil-burning equipment to have a valid Oil Burner Technician Certificate.

It’s also smart to hire a NATE-certified contractor when replacing a boiler (or completing any other type of HVAC project). This certification is awarded by North American Technician Excellence (NATE), the country’s biggest nonprofit certification program for heating, ventilation, air conditioning, and refrigeration (HVACR) professionals. It ensures that your contractor is up-to-date on the latest industry knowledge and has experience in the field.

Permits

In Boston, you need a permit to replace your boiler. Your contractor should include the cost of permits on your project quote (so be sure to ask if you don’t see any permit fees listed) and pull all necessary permits for you.

Sales Tax

It might not be the first thing that comes to mind when you’re tallying up your boiler replacement costs, but you should factor in Boston’s 6.25% sales tax before finalizing your budget. The total amount of tax you pay will depend on the price of your boiler, but for a $4,000 unit, you’d pay $250 in sales tax.

Does Boiler Replacement Increase Home Value?

Yes, replacing a boiler can increase your home value in Boston. Not only can a new boiler help you get through the chilly New England winters, but it can also be a great selling point if you put your house on the market. However, if you pair your new boiler with an updated air conditioning unit to revamp your entire HVAC system, you could boost your home’s value even further—by between 5% and 7%.

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.