Oil tanks and Massachusetts homeowners insurance: what the law requires and what your policy leaves out.

The 2010 oil line law, in plain terms

Chapter 453 of the Acts of 2008 did two separate things. The first was a hardware rule, now sitting at M.G.L. c. 148, §38J.

If you own a one-to-four unit home heated with oil, and the fuel supply or return line contacts concrete, earth, or the floor, one of these has to be true:

• The supply line is enclosed in a continuous non-metallic sleeve.
• An oil safety valve is installed at the tank end of the supply line.
• Another release prevention method approved by the board is in place.

A licensed oil burner technician does the installation. The deadline to comply was September 30, 2011.

There are two ways out. You are exempt if the burner sits above the tank and the entire supply line connects to and stays above the top of the tank. You are also exempt if the line or valve was installed on or after January 1, 1990, the work meets the state standards, and a licensed technician certified it to the head of the local fire department.

The certification matters more than people expect. It is a form, it goes to the fire department, and it is the piece of paper a carrier may ask for.

The insurance half of the same law

The second half of Chapter 453 is now M.G.L. c. 175, §4D. It tells carriers what they have to put on the shelf.

Licensed homeowners carriers and the Massachusetts FAIR Plan must make available:

• First-party property coverage for response action costs, at least $50,000 per occurrence.
• Third-party liability coverage for claims arising out of a release of heating oil, at least $200,000 per occurrence, including legal defense costs.
• A deductible no higher than $1,000 per claim.

Two words in that statute do a lot of work: make available. The carrier has to offer it. Nobody has to buy it, and nothing in the law requires the carrier to remind you it exists. Section 4D also lets a carrier ask for proof that the §38J upgrade was done before issuing the coverage.

So the sequence is: fix the line, get the certification, ask for the endorsement. Skip the first step and the third one can stall.

Why the standard policy is not the backstop

The Massachusetts Division of Insurance is direct about this. Its homeowners insurance FAQ says most homeowners policies do not automatically include oil spill cleanup coverage as part of the standard policy, that state law has required carriers to offer coverage for leaks from oil heat systems since 2010, and that the coverage has to be requested before a spill for it to apply.

That last part is the one that stings. This is not a coverage you can add while the basement smells like fuel oil.

There is a second exposure underneath the first. Under M.G.L. c. 21E, the owner of the property can be on the hook for cleaning up contamination on that property. If oil moves off the lot into a neighbor’s soil or into groundwater, you are looking at third-party claims on top of your own cleanup. That is the exposure the $200,000 liability limit in §4D is aimed at.

What a release actually costs, and how many people are covered

The Licensed Site Professional Association, the trade group for the environmental professionals who run these cleanups, published figures for Massachusetts: cleanup ranging from $20,000 to $50,000 for a simple release, and more than $300,000 for a complex one that reaches both soil and groundwater. The same fact sheet counted 75 residential heating oil spills reported in Massachusetts in 2023.

The coverage number is the one worth sitting with. That fact sheet put roughly 114,000 liquid fuel release riders in force against about 616,000 oil-heated homes. About 19 percent.

We are not going to tell you a leak is coming. Most tanks never leak. But the gap between how many homes have the exposure and how many carry the endorsement is wide, and it is wide because the coverage is optional, quiet, and easy to never think about.

What underwriting looks at

Carriers are not uniform here, and appetite changes. In general, when an oil tank comes up in underwriting or at inspection, these are the things that come up with it:

• Age of the tank, and whether it is the original one.
• Where it sits: basement, crawlspace, outdoors, buried.
• Whether the §38J upgrade was done and whether there is documentation.
• Signs of weeping, staining, or rust at the seams and legs.
• Any history of a release on the property.

A buried tank is its own conversation. Underground storage brings different questions and a much shorter list of carriers.

If a carrier asks for a tank inspection because of the tank’s age, that is a normal underwriting request, not a sign that something is wrong. The answer is to get it done and keep the paperwork.

Buying or selling a house with an oil tank

The moment to sort this out is at closing, not after.

If you are buying:

• Ask for the §38J certification or the fire department permit.
• Ask the age of the tank and where the line runs.
• Ask whether there has ever been a release on the property.
• Have your agent add the oil release endorsement at bind.

If you are selling, having the certification in hand removes a question the buyer’s carrier will otherwise ask at the worst possible time.

If the tank is buried, get a professional opinion before you rely on any assumption about coverage.

What to ask your carrier or agent

Four questions, and you can ask them on the phone in five minutes:

1. Does my current policy include coverage for a heating oil release, or is it excluded?
2. If it is not on there, what limits will you offer for first-party response action costs and third-party liability?
3. Do you need the §38J certification before you add it?
4. What is the deductible?

If the answer to the first question is a pause, that is your answer.

What to do next

• Find out whether the upgrade was done. The fire department or the company that services your burner can usually tell you.
• If it was not done, have a licensed oil burner technician do it and get the certification.
• Ask your agent to add the oil release endorsement, and check the next dec page to confirm it is actually on there.
• If you are moving, handle it at bind.

We are an independent Massachusetts brokerage and we read policies for a living. If you want a second opinion on whether your current policy covers a heating oil release, we will read it and tell you what we find. If it is already on there, we will say that.