Valuation & costs
How Much Does It Cost to Repair Subsidence?
Subsidence repair costs vary enormously depending on the cause and severity. Minor cases — fixing a leaking drain, managing or removing a tree, and filling cracks — can cost a few hundred to a few thousand pounds. Underpinning, the major structural repair, typically costs many thousands (often £10,000-£50,000+). Crucially, buildings insurance usually covers subsidence (subject to an excess), so your out-of-pocket cost may be limited.
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- Insuranceusually covers it
- £10k-£50k+underpinning
- 7-28 dayscash avoids the cost
It depends on the cause and severity
There is no single figure for subsidence repair — it depends entirely on what is causing it and how bad it is. Often the cheapest and most effective fix is to address the cause: repairing a leaking drain, or managing/removing a tree drawing moisture from clay soil. In many cases, removing the cause and monitoring is enough, with only cosmetic crack repair needed. Major structural repair (underpinning) is the expensive end and is not always necessary.
Typical cost ranges
| Work | Typical cost |
|---|---|
| Drain repair | Hundreds to low thousands |
| Tree management/removal | Hundreds to low thousands |
| Crack repair (cosmetic) | Hundreds |
| Monitoring period | Modest |
| Underpinning | Often £10,000-£50,000+ |
These are illustrative — get quotes for your specific case.
What insurance covers
The crucial point: buildings insurance usually covers subsidence, including investigation and structural repair such as underpinning, subject to a subsidence excess (often higher than a standard excess, e.g. £1,000). So even where the works are expensive, your out-of-pocket cost may be limited to the excess. Notify your insurer early and keep continuity of cover — this is one reason a documented, insurer-handled repair is so valuable when you later sell (see selling an underpinned house).
Repair or sell?
Whether to repair depends on the cost (and how much insurance covers), the severity, and your plans. Repairing and documenting the works — with the engineer’s report, completion certificate and any guarantee — restores value and the buyer market. Selling as-is avoids the cost and time but at a lower price. If insurance covers most of the cost and you have time, repairing first usually maximises value; if not, or you need speed, selling as-is can be the better call.
Selling without repairing
If you would rather not undertake the repair, a cash buyer or specialist investor will purchase the subsidence-affected house as-is, factor the remediation cost into the offer, and complete in 7-28 days without a lender to satisfy. You disclose the subsidence, accept a price reflecting the works, and avoid the cost and disruption of repair. See selling with subsidence.
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Written & reviewed by Lisa Hayes, Founder
Lisa Hayes is the founder of Ready Steady Sell and an independent UK home-selling expert with over a decade helping homeowners weigh cash house buyers, property investors and the wider fast house-sale industry — without pressure or hidden fees. Every guide is reviewed for accuracy under our editorial standards.
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Frequently asked questions
Straight answers, no sales talk
How much does it cost to repair subsidence?
It varies hugely — minor fixes (drain repair, tree work, crack filling) cost hundreds to a few thousand; underpinning typically costs many thousands (often £10,000-£50,000+).
Does insurance cover subsidence repair?
Buildings insurance usually covers subsidence, including investigation and underpinning, subject to a subsidence excess. Your out-of-pocket cost may be limited to the excess.
Is underpinning always needed for subsidence?
No — often addressing the cause (a leaking drain or a tree) and monitoring is enough, with only cosmetic crack repair. Underpinning is the major repair, not always necessary.
How much is the subsidence excess on insurance?
It is usually higher than a standard excess — often around £1,000 — but the insurer covers the rest of a covered subsidence claim. Check your policy.
Should I repair subsidence before selling?
If insurance covers most of the cost and you have time, repairing and documenting it maximises value. If not, or you need speed, selling as-is to a cash buyer can be better.
Can I sell without repairing subsidence?
Yes — a cash buyer buys as-is, factors the remediation into the offer, and completes in 7-28 days. You must disclose the subsidence.