Peacehaven · East Sussex
Extension pulling away repairs in Peacehaven
An extension pulling away from a Peacehaven house is often a drain problem, a shallow footing or a missing tie-in, rather than a failing building. Finding out which applies decides whether the fix is a junction repair or new foundations.
Guide price from£670per junction inc VAT

- Postcodes
- BN10
- Population
- about 19,000
- Area
- East Sussex
- Pricing region
- South East
Is East Sussex prone to ground movement?
Peacehaven, East Sussex: about 19,000 residents across postcode districts BN10. Nearby, we also cover Seaford (5 miles), Lewes (6 miles) and Brighton (6 miles).
Shrinkable clay is widespread in East Sussex. Ground movement here is more often linked to soils, drains and trees than to mining. Housing stock in East Sussex: Regency and Victorian terraces on the coast, Wealden timber-framed houses, and inter-war bungalows and semis.
From first photo to finished repair
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.
Find what is moving
An independent chartered structural engineer can inspect, and we can arrange one. A drain survey under the extension, a trial pit at its footing and tell-tale monitoring across the joint are common checks before choosing the repair.
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.
Symptoms that point to extension pulling away repairs
- Patio doors or windows in the extension starting to bind
- Daylight or draughts showing through the internal corner joint
- Floor level dropping where the extension and house floors meet
Guide prices for extension pulling away repairs in Peacehaven
These are guide prices for Peacehaven, using South East 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. | £670 – £2,250 | per junction |
| Movement joint and making goodest. | £450 – £1,350 | per junction |
| Underpinning the extension where needed | £1,100 – £2,800 | per metre of wall |
Methods for extension pulling away repairs
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
Movement joint and making good
Where some seasonal movement is expected to continue, the junction is formed into a proper flexible movement joint with a compressible filler and sealant, so the two parts can move without cracking. Flashings and internal finishes are detailed to suit.
Best for: Minor ongoing movement that does not threaten the structure
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.
Frequently asked questions
What is the price of extension pulling away repairs in Peacehaven?
Guide prices for extension pulling away repairs in Peacehaven start from about £670 per junction, including VAT, on South East rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you carry out extension pulling away repairs in Peacehaven?
Yes, Peacehaven is covered, along with postcode districts BN10. We also cover nearby Seaford and Lewes.
Does the ground around Peacehaven cause cracking?
Inland East Sussex is Weald Clay and Wealden sands, while the South Downs and the coast around Brighton and Eastbourne are chalk. The Weald Clay areas are prone to shrink-swell movement near trees. Only an investigation can say why a particular building has moved.
Who is responsible if a recent extension is moving?
If the extension is recent, the original builder, the designer or building control records may be relevant, and you may have rights against the builder. Gather the plans, completion certificate and contract. Insurance often excludes defects in new construction, so check your policy.
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.
More repairs we carry out in Peacehaven
- Roof structure repairs
- Subsidence insurance claim repairs
- Chimney stack repairs
- Subsidence repairs
- Crack stitching
Extension pulling away repairs near Peacehaven
Call about the cracked extension junction at your Peacehaven property; a free initial assessment first, then a fixed written price once the repair is specified.