Buying a house with oil heat can make sense. Oil heat alone isn’t a reason to pass on a house. The written inspection report answers the heating-system question. The tank is the question you take further. Under InterNACHI’s Standards of Practice, the inspector inspects the heating system using normal operating controls and describes the energy source and the heating method. The Standards also say the inspector describes the location of any observed fuel-storage system, but isn’t required to inspect fuel tanks.
The report can tell you the house heats with oil and where the tank sits. Per the Standards, the inspector isn’t required to inspect or evaluate fuel tanks, and isn’t required to operate any system that’s shut down. Read that location line as a verdict on the tank, or leave a system that didn’t run unexplained, and you can close on a tank nobody evaluated and a system nobody saw run. This is general information for buyers, not heating, legal or financial advice.
What Does a Home Inspection Check on an Oil Heating System?
InterNACHI’s Standards of Practice say the inspector inspects the heating system using normal operating controls. The Standards also say the inspector describes the location of the thermostat for the heating system, the energy source and the heating method. So a written report tells you how the house heats and what fuel runs it.
The Standards also list what the inspector reports as in need of correction: any heating system that did not operate, and if the heating system was deemed inaccessible. Read those lines closely. They tell you what the inspector could and couldn’t do on the day.
Under the plumbing part of the Standards, the inspector describes the location of the main fuel supply shut-off valve and of any observed fuel-storage system. On an oil-heated house, that’s the line that points to the tank.
Our licensed inspectors perform a visual examination of the structure and all major systems. HVAC is among what we evaluate. We document every finding with photographs, so nothing is left to guesswork.
Why Do So Many Houses Around Here Heat With Oil?
Oil heat is concentrated in the Northeast. Per the U.S. Energy Information Administration, about 4.79 million households in the United States used heating oil as the primary heating fuel in the winter of 2023–2024, and about 82% of those households were in the Northeast. That’s why the question comes up for buyers in our area.
Our buried oil tank post says that homes across our region built “from the 1920s through the 1970s frequently ran on oil.” So an oil system in a listing can simply reflect when the house was built.
Any sign of a buried or former tank is its own question. Our post on buying a home with a buried oil tank covers it. Keep it on your list and handle it separately.
What Doesn’t the Inspection Cover on an Oil System?
The Standards list inspecting fuel tanks or underground or concealed fuel supply systems among the things the inspector isn’t required to do. In plumbing, the Standards say the inspector isn’t required to evaluate fuel storage tanks or supply systems. So a fuel-storage location line in your report is a location, not a verdict on the tank.
The Standards also say the inspector isn’t required to inspect, measure or evaluate the interior of flues or chimneys.
As a general principle, a visual inspection can report only what’s visible and accessible on the day. A tank that can’t be seen isn’t part of that picture.
Questions about the tank’s condition or the system’s service belong with a heating professional. The same goes for cost or a conversion. Those are questions for that professional and for your own planning.
What If the Heat Didn’t Run on Inspection Day?
The Standards say the inspector isn’t required to operate any system that is shut down. They also say the inspector reports as in need of correction any heating system that did not operate. So a report can tell you the heat didn’t run without telling you why. That’s a question to settle before you close.
Our service page asks that all utilities — water, electric and gas — be turned on so every system can be tested. As a general rule, an oil system also needs fuel in the tank to run. A buyer can ask the seller to confirm that before the visit.
A report that says the heat didn’t run is something to settle with the seller and your real estate agent. Don’t let that line sit unexplained.
Questions to Ask Before Buying a House With Oil Heat
Put your questions in writing. A written inspection report gives you something specific to bring to the seller or your real estate agent, instead of a general worry about oil heat.
- Did the heating system run with normal controls during the inspection?
- Where does the report say the fuel-storage system is, and could the inspector see it?
- What can the seller document about the tank: its age, any replacement, any problem?
- What service records does the seller have for the system?
- Who supplies the fuel, and is there anything to arrange before closing?
- Is there any sign of a former or buried tank?
Our post on how to read the age of an older furnace notes that in Bucks and Montgomery County we photograph the equipment’s data plate, so you can read the manufacture date yourself.
Questions about the agreement of sale belong with your real estate agent.
What Should Sellers With Oil Heat Do Before the Inspection?
Keep the heating system on and the fuel supply in place so the system can run. Our seller preparation post asks for a three-foot clear zone in front of the furnace and other equipment. And gather what you can document about the tank and the system’s service.
Sellers can’t decide what goes in the report. They can make sure the system is available to test and the paperwork is easy to find.
Frequently Asked Questions About Oil Heat
Does a home inspector check the oil tank?
The Standards say the inspector describes the location of any observed fuel-storage system. They also list inspecting fuel tanks among the things the inspector isn’t required to do. So the report can tell you where a tank was seen, and questions about its condition are for a heating professional.
Will the report say the house heats with oil?
The Standards say the inspector describes the energy source and the heating method, so the fuel belongs in the report. Our licensed inspectors document every finding with photographs, and our reports are delivered within 24 hours.
Is oil heat common in the Northeast?
Per the EIA, about 82% of the households that used heating oil as the primary heating fuel in the winter of 2023–2024 were in the Northeast. That share comes from the EIA’s own reporting on heating oil use.
Does the inspector check the flue or chimney on an oil system?
The Standards list inspecting, measuring or evaluating the interior of flues or chimneys among the things the inspector isn’t required to do. A visual inspection can report only what’s visible and accessible on the day.
Can the seller’s answers replace an inspection?
No. A seller’s answers tell you what the seller knows. A full written home inspection documents what’s visible and accessible on the day, with photographs. Use both.
Know What You’re Taking On
Inspection Professionals’ written report documents every finding with photographs and is delivered within 24 hours, so you can see the evidence for each finding rather than a summary.
Knowing what the report says about the oil system, and what it leaves to you, gives you specific questions for the seller before closing.
A full home inspection is the written report to have in hand while you ask.
If you’re buying a house with oil heat in Bucks County, Montgomery County, Philadelphia or Delaware County, contact Inspection Professionals about a full written home inspection.
