When buying a home, one thing you might not think about is what could be hiding beneath the yard. In older homes, it’s not uncommon to find buried heating oil tanks that were once used to fuel furnaces. Even if a home no longer relies on oil heat, those underground tanks may still be there, and they can pose risks if left unchecked. That’s why I always recommend an oil tank scan during the inspection process.
What Is an Oil Tank Scan?
An oil tank scan is a non-invasive inspection where a professional uses specialized equipment (typically large metal detectors) to locate underground storage tanks. These scans can detect tanks that were abandoned, improperly decommissioned, or forgotten about over time. And over time, the metal can degrade, and any remaining oil can leak out into the ground.
Why Do One?
Old buried oil tanks can create problems for both homeowners and buyers:
- Environmental hazards – Leaking tanks can contaminate soil and groundwater, leading to costly cleanup.
- Legal liability – If contamination is found after you purchase a property, you may be held responsible for remediation.
- Future costs – Removing or properly decommissioning a tank can cost thousands of dollars.
An oil tank scan provides clarity before you buy, so you know exactly what’s underground and can avoid surprises later.
Who Should Get an Oil Tank Scan?
An oil tank scan is especially important if:
- The home was built before the 1980s (when oil heat was more common).
- There are no records showing that the heating system was always gas or electric.
- The property shows signs of past oil use, like capped pipes protruding from the ground or foundation.
- There’s no record of any oil tank being decommissioned.
- There’s no record of a past oil tank scan for the property.
What Does It Cost?
Oil tank scans generally range from $125–$200, depending on the size of the property. While it’s an extra expense during inspections, it’s minimal compared to the cost of tank removal or environmental cleanup, which can run $2,500–$20,000+.
The Bottom Line
A buried oil tank is out of sight, but it shouldn’t be out of mind. Having an oil tank scan done as part of your due diligence is a smart step to protect your investment, your health, and your peace of mind.