Does the whole house need underpinning?

Almost never. Underpinning is targeted at the elevations or bays that have moved. The specialist sizes the work to the survey findings.

What does the warranty cover?

Most specialists offer a 10-year warranty against further movement of the underpinned section, transferable to a new owner.

Are there cheaper alternatives?

Resin injection is often cheaper where the cause is shrinkable clay rather than failing footings. The survey identifies which method is appropriate.

Underpinning in Bexley

The permanent, insurer-recognised fix for serious settlement on older south London homes.

Worried about it? Here's what happens next.

If you've been told you need underpinning, you're probably already worried about the cost, the noise and the time on site. The honest reality: it's the most invasive of the repair methods, but for some cases it's the only one that lasts. The first thing to confirm is whether you actually need it. Many homeowners get an underpinning quote when resin would do the job for a third of the price.

1. Second-opinion survey

If you already have an underpinning quote, a second specialist confirms whether it's the right method.

2. Engineer-designed bay sequence

Bays are sized and staggered so the wall stays fully supported throughout.

3. Mass concrete pour and sign-off

Building control inspect each bay. 10-year transferable guarantee on completion.

Will Underpinning work for my home?

This is right for you if…

✓ Shallow Victorian footings that have failed on deep clay
✓ Properties where resin injection won't reach a stable bearing layer
✓ Cases where the original footing is cracked, undersized or sitting on unsuitable ground

This isn't the answer if…

× Most modern build types (resin or stitching is usually enough)
× Tree-related clay shrinkage on intact footings (resin is faster and cheaper)

What it will cost and how long it takes

Cost

Mass concrete underpinning in south east London typically costs £15,000 to £45,000 depending on the number of bays and access. Insurance covers most cases tied to active subsidence claims subject to a standard excess.

Timeline

Four to six weeks on site for most domestic projects. Home stays liveable throughout, with kitchen and at least one bathroom remaining in use.

What you actually get

Permanent solution for deep clay

Extending footings below the active zone removes seasonal shrinkage as a cause.

Insurer-recognised method

Accepted by every major UK buildings insurer.

Engineer-designed bay sequence

Signed off by a structural engineer to keep the wall stable during excavation.

10-year transferable guarantee

Standard guarantee that passes to the next owner if you sell.

Will my insurance pay for it?

Mass concrete underpinning is universally accepted by UK insurers. The specialist handles the claim paperwork end to end and prices the work against your buildings cover.

Areas We Cover for Underpinning

Specialists working on underpinning in these south east London locations:

Underpinning in Bexleyheath Underpinning in Blackheath Underpinning in Bromley Underpinning in Chislehurst Underpinning in Dartford Underpinning in Eltham Underpinning in Erith Underpinning in Greenwich Underpinning in Orpington Underpinning in Sidcup Underpinning in Welling

Get a Underpinning specialist in Bexley

Speak to a vetted subsidence specialist covering your postcode. No obligation, callback usually within 1 working day.

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Underpinning FAQs

It's the most invasive of the repair methods. Expect a working area of around two metres in front of the wall being underpinned, noise during excavation, and concrete delivery days.