Houses Built On or Near a Historic Landfill: What the EPA Register Shows

Towns grew over their old dumps. A closed landfill can sit under a green area, a car park or, occasionally, the house itself — and the listing will not mention it. The EPA keeps the register, and it is public.

What a historic landfill is

Under section 22 of the Waste Management Act, local authorities had to identify the landfills that operated before modern licensing — the town dumps, the quarry infills, the sites that closed before 1997 — and register them with the EPA, which issues a Certificate of Authorisation setting out how each site must be managed. The result is a national register of closed and historic landfills with their mapped boundaries.

The register covers the authorised sites. Older or smaller dumps that were never identified are not on it, which is why a clean result is reassuring but not conclusive.

Why it matters for a home

Decomposing waste produces ground gas — methane and carbon dioxide — that can migrate through soil and collect in buildings, and leachate that can contaminate ground and water. Modern landfills are engineered to contain both; historic ones often were not. A house built on or immediately beside one needs a specialist’s view on gas protection and ground conditions, and a lender may want the same.

Beyond the risk itself, a landfill nearby affects what you can do with the land, what an insurer or lender asks, and what the next buyer’s surveyor will raise. Knowing now is cheaper than finding out from them.

Capping, monitoring and what a site becomes

A Certificate of Authorisation sets out how a historic site must be managed: capping to keep rain out of the waste, gas and leachate monitoring, and an after-care period that can run for decades. Well-managed sites become playing pitches, parks and car parks, and many people live happily beside them. The questions are whether the works were done, whether monitoring continues, and what it shows.

The historic register is separate from the EPA’s licensed industrial and waste facilities — the modern, engineered landfills and the factories and plants that hold an EPA licence. Those are a different check in the report (Industrial sites), with their own distances, so a clean landfill result does not mean there is no licensed facility nearby.

How a VeriSale report grades it

VeriSale checks the EPA’s mapped closed and historic landfills for the property’s point and for sites within 500 m — the distance over which gas and contamination effects are local. The EPA has published mapped boundaries for only a minority of registered sites so far, so a clear result means no mapped site is recorded there, not that the ground has been checked.

• The property sits on a recorded historic landfillGraded very low: “get specialist ground-gas/contamination advice.”
• One or more landfills within 500 mGraded mid: “worth a surveyor’s view on ground gas.”
• None on or within 500 mGraded well, with the caveat that older dumps may be unrecorded.

This is one of 39 checks in the report, each graded A–F with a plain-language summary. The report compiles public data; it is not a survey or legal advice.

What to ask before you bid

• Was the site, or any part of the estate, formerly a landfill or infilled ground?
• Does the house have ground-gas protection (a membrane and ventilated sub-floor), and was it certified?
• Has there ever been an environmental site assessment, and can the seller share it?

Frequently asked questions

Other checks explained