Can You Sell a House with Subsidence in Northern Ireland?

By James Gorman

You can sell a house affected by subsidence, but the sale needs reliable diagnosis and a clear history. Not every crack is subsidence, and treating all movement as the same can lead to poor decisions about repair, insurance, price and marketing.

A seller should establish what happened, whether movement is active, what work was completed and how the property has performed since. Surveyors, insurers and lenders may each need different evidence.

Get the movement properly diagnosed

Cracking can result from settlement, thermal movement, failed materials, leaking drains or other causes. Ask a suitably qualified building surveyor or structural engineer to investigate rather than diagnosing the property from crack shape alone.

The professional may recommend measurements, drainage checks, ground investigation or a period of monitoring. Agree the scope in writing and keep every report, drawing, photograph and test result.

If the evidence does not confirm subsidence, retain that finding. If it does, the report should explain the likely cause, current activity and recommended next steps without claiming certainty beyond the investigation.

Speak to the insurer before arranging major work

Check the buildings-insurance policy and contact the insurer where a potential claim may exist. Starting structural work without discussing the position can affect how an insurer handles the matter.

Keep the claim reference, correspondence, loss-adjuster reports, specifications, invoices, completion records and any monitoring after repair. If the property has changed insurer, collect the historic evidence while it is still accessible.

Do not describe the matter as resolved only because visible cracks were filled. Buyers will want to know whether the cause was understood and whether movement remained stable.

Prepare one clear property history

Create a timeline showing when signs first appeared, who inspected them, what was found, what work followed and what monitoring took place. Include relevant drainage, tree, foundation or structural records where they form part of the professional conclusion.

Give the file to your solicitor and estate agent early. Answer buyer enquiries accurately and allow the buyer's surveyor and lender to reach their own view.

The guide to renegotiating after a survey explains why evidence and repair scope matter when a buyer raises a condition issue after agreeing a price.

Expect mortgage and insurance questions

A buyer's lender may ask for a structural report, repair evidence, monitoring or insurance information. Policy varies by lender and case, so neither an agent nor a seller can guarantee a mortgage outcome.

The buyer will also need suitable buildings insurance. Historic claims, underpinning or ongoing monitoring may affect the information requested by insurers. Encourage early enquiries rather than allowing the issue to appear near exchange or completion.

Where further work is needed, consider whether completing it before launch will improve the buyer pool or whether the property should be marketed with a clear specification and realistic price. That decision should use professional cost and condition evidence.

Set a realistic sale strategy

There is no universal subsidence discount. Value depends on the property, diagnosis, repair history, stability, insurance position and the number of buyers able to proceed.

James can help position the home and organise the marketing around the facts. Start with a free Derry property valuation, then contact James Gorman Property with the date and type of the latest professional report.

Official guidance

The RICS consumer guide to subsidence explains the difference between subsidence and settlement, common warning signs, professional investigation, insurance and repair options.

This article is general property information, not structural, insurance, mortgage, legal or survey advice. Use your own insurer, solicitor, lender and appropriately qualified building professionals.