Heating Oil, Propane & Home Services on the South Shore
One family-owned company for dependable heating oil and propane delivery, HVAC, plumbing, and electrical work, with 24/7 emergency service when you need it most.
Your full-service fuel and home services company
Williams Energy has delivered heating oil, propane, and full home services across the South Shore since 1919. What started as a local fuel and construction business has grown into one trusted name for keeping your home warm, comfortable, and running, from the tank in the basement to the panel on the wall.
Generations of South Shore families have stayed with us for the same reasons: fuel that shows up before the tank runs low, a real person who answers the phone, and technicians who handle heating, cooling, plumbing, and electrical work without sending you to four different companies. You can read the full story of how Williams Energy started and where it stands today on our about page.
Everything your home needs, under one name
Five service lines, one local team. Pick the one you need today, or lean on us for all of them.
Heating Oil
Premium heating oil and Bioheat delivery, automatic or will-call, with transparent South Shore pricing and tank service.
Explore heating oil →Propane
Clean-burning propane delivery, tank installation and monitoring, and bottle exchange for heat, hot water, and cooking.
Explore propane →Heating & Cooling
HVAC repair and installation, heat pumps, AC, furnaces, boilers, and natural gas conversions as a Mitsubishi Diamond dealer.
Explore HVAC →Plumbing
Plumbing repair, water heater installation, drain cleaning, and emergency frozen-pipe help across the South Shore.
Explore plumbing →Electrical
Electrical repair, new installations, and whole-home generator installation to keep the lights on through every storm.
Explore electrical →Thinking about a heat pump? Now is a smart time to upgrade
Plenty of South Shore homes still run on an aging boiler or furnace, with cold rooms upstairs and no central air through a humid coastal summer. A modern heat pump handles both jobs from one system: efficient heat in the winter and cooling in the summer. As a Mitsubishi Diamond dealer, we install cold-climate models that hold up to a real New England winter, not the underpowered units that gave heat pumps a bad reputation years ago.
The cost picture has shifted too. Massachusetts rebate programs and incentives can take a large chunk off the price of a new system, and we walk you through exactly what your home qualifies for before you sign anything. You get an honest look at whether the upgrade pays for itself, with no pressure either way. See current heat pump rebates and incentives.
A century of taking care of South Shore homes
Williams Energy is a family-owned local business, founded by George A. Williams and still run on the values he set: integrity, dependability, and showing up for your neighbors. Over more than a hundred years we have grown to cover a wider range of services than most of our competitors, so one trusted team can handle your fuel, your comfort systems, your plumbing, and your wiring.
Watch the short video to meet the people behind the name and see why so many South Shore families have stayed with us across generations. See why neighbors choose Williams Energy.
Find the help that fits your home today
Whether you are filling a tank, planning an upgrade, or facing a breakdown right now, there is a clear next step.
Never run low
Automatic heating oil delivery means your tank gets filled before it gets low, even in a January cold snap. No watching the gauge, no run-out worries, no surprises. See how oil delivery works.
Upgrade and save
Tired of an old system and high bills? As a Mitsubishi Diamond dealer we install efficient heat pumps and high-efficiency systems, and we walk you through every Massachusetts rebate you qualify for. Explore heat pump installation.
Need us now
No heat, an empty tank, or water on the basement floor does not wait for business hours. Our 24/7 emergency line gets a local technician headed your way fast. See emergency plumbing help.
Plan ahead
A heating service plan keeps your equipment tuned, catches small problems early, and gives you priority when the weather turns. Predictable comfort, predictable cost. Compare service plans.
Becoming a customer is simple
Three steps from your first call to a warm, well-run home.
Reach out
Call us or request a free estimate online. Tell us what you need, whether that is fuel delivery, a repair, or a brand new system.
Get a straight answer
We look at your home and lay out your options, timing, and cost in plain language. No surprises, and no hard sell.
We handle the rest
Your delivery, install, or repair gets scheduled with a local crew, and our 24/7 line is there if anything comes up afterward.
Serving homes and businesses across the South Shore
From our offices in Braintree and Marshfield, our drivers and technicians know the South Shore the way only a local company can, from the narrow coastal roads to the older Capes and colonials that were built before natural gas ever reached the street. We serve Braintree, Marshfield, Hingham, Duxbury, Kingston, Norwell, Plymouth, Carver, Middleboro, Cohasset, and the surrounding towns.
When a nor'easter rolls in, being genuinely local is what gets fuel to your door and a technician to your home on time. Find your town and the services we offer there.
What our neighbors say
"The rep was thorough and went through everything. Fuel was delivered the next day as well as servicing the boiler. Highly recommended by my family, having used them for decades, as I'm sure I will also."— Mike S.
"The Williams team was amazing. It was quick scheduling the appointment, and the service was performed efficiently and with excellent care. We had our bathroom vanity installed and I could not be happier. I highly recommend!"— Sonya H.
"I am very happy with the clear and fast response from Williams Energy. They explained up front how they charge for service, and there were no surprises. I will use their services again."— Jen G.
Common questions
What services does Williams Energy offer?
We are a full-service fuel and home services company. That covers heating oil and Bioheat delivery, propane delivery, HVAC repair and installation including heat pumps and air conditioning, plumbing, and electrical work. Most South Shore homes can rely on us for everything from a fuel fill to a new heating system to a generator install.
What areas do you serve?
We serve the South Shore of Massachusetts from our offices in Braintree and Marshfield, including Hingham, Duxbury, Kingston, Norwell, Plymouth, Carver, Middleboro, Cohasset, and the towns around them. Our service radius reaches about 50 miles from Braintree.
Do you offer automatic fuel delivery so I never run out?
Yes. With automatic delivery we track your usage and the weather and schedule a fill before your tank gets low, so you are not watching the gauge in the middle of winter. If you prefer to order yourself, will-call delivery is available too.
What happens if I have a no-heat or no-fuel emergency?
We offer 24/7 emergency service for situations that cannot wait, like no heat, an empty tank, or a burst pipe. Call (781) 843-0415 any hour and we will get a local technician headed your way.
Can a service plan help me avoid breakdowns?
A heating service plan covers regular maintenance, catches small issues before they become expensive failures, and gives you priority scheduling when demand spikes in a cold snap. It is the simplest way to keep both your equipment and your budget predictable.
How do I become a Williams Energy customer?
Becoming a customer takes just a few minutes. You can request a free estimate for a project or installation, or sign up for fuel delivery and service, and our local team will take it from there.