Old two- and three-families
The median home in Gloucester was built in 1946. A third of the city's housing units are in two- to four-family houses, one of the highest shares on this site. Three in ten homes heat with oil, four in ten with gas and two in ten with electricity.
In an old multi-family the water heaters often stand together in one basement. Label which heater serves which apartment, and which valve shuts each one. When one leaks at night, that label saves ten minutes. What to do in those ten minutes.
The city's own water
Gloucester is not an MWRA community. The city runs its own water system. Ask the water department for the hardness figure and flush the tank at least once a year. Why hardness matters.
Rental units
If you own the building, hot water is your obligation to the tenants, with a deadline. What the state code requires.
Gas and rebates
National Grid supplies both gas and electricity. For a gas smell, leave and call 911, then National Grid at 800-233-5325. Mass Save's 2026 rebate on a heat pump water heater is $750.