Boiler Replacement Cost in Boston, Massachusetts
Boiler replacement in Boston runs about $13,400 for a typical job. Basic installs start near $7,900. High-efficiency equipment with duct or electrical work can reach $17,900.
Boston Weather and HVAC Load
NOAA's 1991-2020 climate normals put Boston at 5,545 heating degree days and 801 cooling degree days per year. Heating is the bigger job here, and furnaces and heat pumps in Boston put in far more hours than the air conditioner. A normal year brings 92 nights at or below freezing and 14 days over 90°F. Snowfall averages about 49 inches. For a 2,000 sq ft house, this climate points to a heating load somewhere near 60,000 BTU/h. Treat that as a starting number. A Manual J calculation will move it up or down based on insulation and windows.
| Heating degree days / year | 5,545 |
|---|---|
| Cooling degree days / year | 801 |
| Nights at or below 32°F | 92 |
| Days above 90°F | 14 |
| Average low / high | 44.5°F / 59.3°F |
Boston Housing Stock
The median Boston home dates to 1947, according to the Census ACS. That makes the typical house about 79 years old. Many houses that age were built with hot-water or steam heat, and plenty still run cast-iron boilers and radiators. Boston has roughly 99,000 owner-occupied homes, or 35.4% of households. The median home value is $710,400, and median household income is $94,755. We use both figures to adjust labor and pricing for this page.
Between 2020 and 2025, NOAA's Storm Events Database logged 2 hail days and 15 days with damaging thunderstorm winds in Suffolk County. Storms here are more likely to cause power surges than coil damage, so a surge protector on the outdoor unit is worth the small cost.
When Replacement Makes Sense
- Leaks, rust, or pressure that keeps dropping
- Fuel bills keep going up
- Some radiators stay cold
- The pilot or ignition keeps failing
What Moves the Price
- Condensing or non-condensing boiler
- A new chimney liner or venting
- Fuel type: gas, oil or propane
- A combi boiler that also makes your hot water
- Pumps, zone valves and the piping around the boiler
For Boston we raised the national figures about 43%, based on local income, home values and climate-based equipment sizing. Get at least three written quotes; real bids can land outside this range.
What the Quote Should Cover
- The new boiler and the piping around it
- Startup and safety tests
- Venting and fuel hookups
- Removing the old boiler
- Flushing and refilling the system
Massachusetts Permits, Efficiency Rules and Rebates
Massachusetts falls in the DOE's North region. New split central air conditioners must meet at least 13.4 SEER2, and heat pumps sold anywhere in the U.S. need 14.3 SEER2 and 7.5 HSPF2. Plan on a mechanical permit for most replacements in Boston; the contractor normally pulls it. Before you sign, ask each bidder for their Massachusetts license or registration number and proof of insurance. The federal 25C tax credit ended for equipment installed after December 31, 2025, so incentives now come mostly from utilities and state programs. Check your electric and gas utility's rebate page before you pick equipment.
Before You Hire
- For a steam system, hire a contractor who works on steam regularly.
- Ask for a heat-loss calculation. A lot of old boilers are much bigger than the house needs.
- Ask your gas or oil company about rebates on condensing boilers.
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Boiler Replacement Questions from Boston Homeowners
How much is boiler replacement in Boston?
Plan on $7,900 to $17,900, with most jobs near $13,400. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule boiler replacement in Boston?
Between late spring and early fall. Boston averages 92 freezing nights a year, and heating calls spike from November through February.
Can I replace a boiler with a heat pump?
Yes, with an air-to-water heat pump or a ductless system. The radiators may need upgrading, because heat pumps run cooler water than boilers.
How long does a boiler last?
A cast-iron boiler can last 25 to 35 years. A modern condensing boiler usually lasts 15 to 20 with yearly service.
Boiler Replacement Near Boston
- Cambridge $8,700 to $19,700
- Worcester $6,500 to $14,700
- Springfield $5,700 to $12,900
- Lowell $6,800 to $15,400
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Boston Logan International Airport; NOAA Storm Events Database 2020-2025, Suffolk County. Prices are our estimates, not contractor quotes. Updated 2026.