Smethwick · West Midlands
Extension pulling away repairs in Smethwick
Rear and side extensions are common across Smethwick, and so is the crack where new meets old. Usually it reflects the two parts sitting on different foundations, and the first question is whether the gap is still opening.
Guide price from£600per junction inc VAT

- Postcodes
- B21, B66, B67
- Population
- about 54,000
- Area
- West Midlands
- Pricing region
- West Midlands
What is the ground like in West Midlands?
Smethwick is in West Midlands and takes in postcode districts B21, B66, B67. About 54,000 people live there. Neighbouring towns we cover: West Bromwich (2 miles), Birmingham (3 miles) and Halesowen (5 miles).
Parts of West Midlands have clay that can shrink near trees in dry spells. Parts of West Midlands lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. What you mostly find across West Midlands: Victorian terraces, inter-war semis, Black Country industrial housing and large post-war estates.
What should you budget for extension pulling away repairs in Smethwick?
These are guide prices for Smethwick, using West Midlands rates and including VAT. Your written quote follows photos or a survey, and is fixed once the repair is specified.
| Item | Guide price | Per |
|---|---|---|
| Junction crack repair with stainless tiesest. | £600 – £2,000 | per junction |
| Movement joint and making goodest. | £400 – £1,200 | per junction |
| Underpinning the extension where needed | £1,000 – £2,500 | per metre of wall |
Repair options we may recommend
Junction crack repair with stainless ties
The open joint is cut out, stainless ties or helical bars are fixed across it into both the old and new masonry, and the joint is repointed or rendered to match. Inside, the corner is replastered. This suits extensions that moved once and have since stopped.
Best for: Settled extensions with a stable gap at the junction
Underpinning the extension
If the extension is still dropping because its footings are too shallow or on poor ground, they are taken deeper by mass concrete, beam-and-base or mini-piles. The engineer designs the scheme, and the junction is repaired once the new foundation is in.
Best for: Active movement from shallow footings, roots or soft ground
What to expect when we carry out extension pulling away repairs
Show us the junction
Send photos of the crack outside, the internal corner and any flashing above, with a measure for scale. We give a free initial assessment and an initial view on whether the gap is likely old or still opening.
Choose the fix
The engineer decides between ties, a movement joint or underpinning. We confirm a fixed price in writing once the repair is specified, covering the junction, flashings, internal finishes and any foundation work.
Finish and hand over
Internal corners are replastered, skirtings and coving refixed, and doors or windows in the extension eased where the movement affected them. Records of the repair and any approvals are passed to you.
Is it time for extension pulling away repairs? Common signs
- Mastic or render at the joint repeatedly splitting open
- Floor level dropping where the extension and house floors meet
- A vertical crack or gap where the extension meets the house
Rules for extension pulling away repairs in England
In England, underpinning and other work that alters or strengthens a wall or foundation is building work under the Building Regulations (Part A, structure), so building control approves and inspects it. Like-for-like repairs often are not, and we tell you which applies before a price is agreed. Work to a party wall, or excavation close to a neighbour’s foundations, can also need a notice under the Party Wall etc. Act 1996.
Your extension pulling away repairs questions
How much will extension pulling away repairs cost in Smethwick?
Guide prices for extension pulling away repairs in Smethwick start from about £600 per junction, including VAT, on West Midlands rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you cover Smethwick?
We do. Smethwick and the surrounding area are covered, including nearby West Bromwich and Birmingham. A free initial assessment from your photos is the first step.
Is the ground in West Midlands prone to subsidence?
The West Midlands is mostly Mercia Mudstone and glacial till, with the South Staffordshire coalfield under much of the Black Country, where shallow coal and limestone workings are recorded around Dudley, Tipton and Walsall. Only an investigation can say why a particular building has moved.
Can a drain under my extension cause it to move?
Yes, a cracked or displaced drain beneath or beside an extension can soften clay or wash away fine soil. A CCTV drain survey usually finds it. Repairing the drain is often the first and most important step before any repair to the walls.
Can I just fill the gap with mastic?
Mastic can keep water out short term, but it does not stop movement or reconnect the walls. If the gap reopens after filling, something is still moving. Photograph and measure it over a few months first, so an engineer can see the trend.
Other structural repairs in Smethwick
- Mining subsidence repairs
- Retaining wall repairs
- Lintel replacement
- Structural crack repairs
- Crack stitching
Extension pulling away repairs near Smethwick
For a no-obligation written quote to repair an extension pulling away in Smethwick, call or send a few photos with a tape measure across the gap.