Environmental searches explained — and when you need one

An environmental search is a £30–60 desktop report your conveyancer orders when you buy a property. It answers one question: is there anything in the recorded environmental history of this land — landfill, industry, contamination risk — that you or your lender should know before exchange? For most buyers it comes back clear and is never thought about again. This guide is for when it doesn't, and for deciding whether you need more than the basic version.

What the search actually checks

The main providers (Groundsure, Landmark, and conveyancer-branded versions of the same) compile broadly the same sources:

• Historic landfill records— the same Environment Agency dataset this site is built on: 19,851 closed sites across England. Around 55% of England postcodes have at least one within 1km, which is why "landfill within 250m" appearing on a search result is common and rarely a deal-breaker.
• Current permitted waste sites — operational landfill and waste-transfer stations (not covered by this site).
• Historic industrial land use — from old Ordnance Survey maps: gasworks, tanneries, works of all kinds.
• Contaminated land— sites formally determined under Part 2A of the Environmental Protection Act 1990 (a small, serious list held by councils), plus a modelled "potentially contaminative" assessment.
• Other factors — flood risk, ground stability, radon, energy/infrastructure projects, depending on the product.

How to read the result

Reports conclude with a risk assessment, usually "Passed" or "Further action recommended". Two things matter:

• "Passed" doesn't mean pristine. It means the assessor judged the recorded factors unlikely to lead to the property being designated contaminated land. A former tip 400m away will often still be listed in the detail — read the detail.
• "Further action" isn't a failed house. It means the assessor wants more information — commonly a lender- driven request for a "risk screening" or, rarely, a phase 2 ground investigation. Many further-action results are resolved with a £150–400 desk review; genuine remediation cases are the exception.

When you actually need one

If you're buying with a mortgage, the decision is made for you — virtually all conveyancers order one as standard and lenders expect it. The real questions are at the margins:

• Cash buyers: searches are optional, and skipping them saves days, not real money. If the free data (this site, EA flood maps) shows anything nearby — or the area has industrial history — spend the £60.
• Buying on or beside a recorded site: upgrade from the basic screening report to one with a manual risk assessment, and make sure your conveyancer actually raises enquiries with the seller about ground condition, gas membranes and any warranties from when the estate was built.
• Remortgaging: usually not required unless the lender asks.

What free data covers — and where it stops

You can check historic landfill proximity for free by searching your postcode on this site, and it's worth doing before you offer — it's the single most common "surprise" in environmental search results. But the paid search adds the contaminated-land register, operational sites, the old industrial-use maps and a professional risk opinion with liability attached. Free data tells you what questions to ask; the search is the formal answer your lender will accept.

What to do now

1. Search the postcodeyou're buying — free, 30 seconds, and you'll walk into the conveyancing process knowing what the search will find.
2. If anything shows within 250m, read our guide to buying near a former landfill.
3. When you instruct a conveyancer, ask which environmental search they order and whether it includes a manual assessment if a risk is flagged.