How much does underpinning cost in the UK?
Underpinning costs £15,000 on average in the UK. Most jobs fall between £5,000 and £60,000 for the job. Extent of underpinning: One wall or small section £5,000 to £15,000; Larger section or a corner £15,000 to £30,000; Full property £30,000 to £60,000. Prices reviewed July 2026.
Underpinning strengthens or deepens a building's foundations, usually after subsidence. It is priced by how much of the property is affected, and always needs a structural engineer.
Underpinning cost calculator
Use the calculator to price your underpinning in 2026. Adjust the options and area for a UK cost range. Nothing is sent anywhere.
Underpinning cost breakdown
Typical underpinning costs, by option:
| Extent of underpinning | Typical UK cost |
|---|---|
| One wall or small section | £5,000 to £15,000 |
| Larger section or a corner | £15,000 to £30,000 |
| Full property | £30,000 to £60,000 |
| + Structural engineer and building control | add £1,000 to £3,000 |
What's included in the price?
Typical underpinning prices include:
- Excavating and pouring new foundations in sections
- Working to a structural engineer's design
- Building control sign-off
- Making good
What changes the price?
The things that move underpinning prices most:
How much of the property is underpinned
Depth and ground conditions
Access for excavation
Structural engineer and building control fees
These are why two quotes for the same job can differ, and the only way to know your price is to get prices from local firms (through Bark; we may earn a fee, at no extra cost to you).
Does where you live change the cost?
In London, underpinning typically costs around £18,000 for the job, about 20% above the UK average of £15,000. In the North, Scotland and Wales the guide figure is nearer £14,500.
| Region | From | Typical | Up to |
|---|---|---|---|
| Midlands / East (UK average) | £5,000 | £15,000 | £60,000 |
| London | £6,000 | £18,000 | £72,000 |
| South East / South West | £5,300 | £16,000 | £63,000 |
| North / Scotland / Wales | £4,900 | £14,500 | £58,000 |
Guide prices for the job, scaled with the same regional multipliers as the calculator. Not quotes.
Underpinning cost in major UK cities
| City | From | Typical | Up to |
|---|---|---|---|
| Belfast | £4,800 | £14,500 | £57,000 |
| Birmingham | £5,000 | £15,000 | £60,000 |
| Bristol | £5,300 | £16,000 | £63,000 |
| Cardiff | £4,900 | £14,500 | £58,000 |
| Edinburgh | £4,900 | £14,500 | £58,000 |
| Glasgow | £4,900 | £14,500 | £58,000 |
| Leeds | £4,900 | £14,500 | £58,000 |
| Liverpool | £4,900 | £14,500 | £58,000 |
| London | £6,000 | £18,000 | £72,000 |
| Manchester | £4,900 | £14,500 | £58,000 |
| Newcastle | £4,900 | £14,500 | £58,000 |
| Sheffield | £4,900 | £14,500 | £58,000 |
City guide estimates, scaled by local labour costs. Indicative averages for underpinning, not quotes.
The South East and London run above the national figures; ground conditions matter more than location.
Compare this with a real quote
The figures above are guide prices. Two or three quotes for your underpinning tell you what it costs where you live.
Free and no obligation. You answer a few questions on Bark, local pros get in touch, and you decide who, if anyone, to hire. We may earn a fee, at no extra cost to you.Common questions
How much does underpinning cost?
Underpinning costs roughly £5,000 to £60,000 in the UK, typically around £15,000. One wall or a small section is £5,000 to £15,000, a larger section or a corner £15,000 to £30,000, and a full property £30,000 to £60,000 or more. A structural engineer's design and building control, always required, add £1,000 to £3,000 on top.
Is underpinning covered by insurance?
Where underpinning is needed because of subsidence, buildings insurance often covers it, subject to your policy and excess (subsidence excesses are typically £1,000). It is worth claiming rather than paying out of pocket. If you are underpinning by choice, for an extension or a basement rather than to fix subsidence, that is not an insurance matter and you pay for it yourself.
Is it okay to buy a house that has been underpinned?
Usually yes, if it was done properly. Ask for the structural engineer's certificate, the building control sign-off, and any guarantee, and check whether it was a subsidence claim, which can affect future insurance. Properly underpinned and documented, the house can be perfectly sound; the thing to avoid is unrecorded or DIY underpinning, which is why the paperwork matters.
What are the disadvantages of underpinning?
It is expensive, disruptive and slow, and a subsidence history can make a home harder to insure or sell even once fixed. It also does not always address the cause, such as tree roots or a leaking drain, so those need dealing with too. For genuine subsidence it is often the right fix, but it is a major structural job, not a light undertaking.
Can subsidence be fixed without underpinning?
Sometimes. Minor subsidence caused by nearby trees or a leaking drain can settle once the cause is removed, and modern resin or ground-injection methods can stabilise some foundations for less disruption than traditional underpinning. A structural engineer should assess the cause first, because underpinning a symptom without fixing the cause is money poorly spent.
Can I do underpinning myself?
No. Underpinning is structural work that must be designed by a structural engineer and signed off by building control, so it is not a DIY job. Getting it wrong can make subsidence far worse or bring a wall down. The engineer and building control fees, around £1,000 to £3,000, sit on top of the groundwork. The only part you handle is choosing a contractor and clearing access; the work itself has to be done by professionals.
Does underpinning add value to a house?
Not really, it protects value rather than adds it. Underpinning a wall costs £5,000 to £15,000, and a whole property £30,000 to £60,000, but a buyer sees a house that has had subsidence, which can worry lenders even once fixed. The gain is that the property is stable, insurable and sellable at all. Treat it as essential repair you do to protect the home, not money you get back.
Official guidance and sources
The rules and schemes referenced on this page come from these official UK sources. The price figures are Costwise's own; see how we price.
- Building regulations approval GOV.UK · Underpinning is structural work that must comply with the Building Regulations.
- Building control: when you need approval Planning Portal · When building control approval is required for structural work.
Cite this data
These figures are free to use in articles, reports and research under a CC BY 4.0 licence. All we ask is a credit to Costwise, and online a link. Where your style allows, please make "Costwise" the linked word so readers can check the figure for their own region.
Costwise (2026): Underpinning typically costs £15,000 in the UK, ranging from £5,000 to £60,000 for the job. Reviewed July 2026. costwiseuk.co.ukSource: Costwise (costwiseuk.co.uk)Costwise (2026). Underpinning cost. Costwise UK cost data, version 2026-10-05. https://costwiseuk.co.uk/underpinning-cost/2026-10-05 (158 jobs)Dataset DOI: 10.5281/zenodo.21159943 · also on Kaggle, Hugging Face and Figshare. Method: how we price. Downloadable CSV.
These are independent guide prices based on typical UK jobs in 2026. Your actual cost depends on your property, spec, access and where you live. Always get at least three written quotes before committing.