Belfast · County Antrim
Extension pulling away repairs in Belfast
Repairing a separating extension in Belfast can be as simple as tying the junction or as involved as underpinning. The choice rests on the movement history and the ground, and we confirm a fixed written price once the repair is specified.
Guide price from£530per junction inc VAT
- Postcodes
- BT1, BT2, BT7
- Population
- about 350,000
- Area
- County Antrim
- Pricing region
- Northern Ireland
What should you know about the ground under Belfast?
Belfast, County Antrim: about 350,000 residents across postcode districts BT1, BT2, BT7. If you are just outside Belfast, we also cover Newtownabbey (4 miles), Lisburn (7 miles) and Carrickfergus (10 miles).
Most of County Antrim is on firmer ground than the clay belts of the south-east. Historic brine and salt working has caused ground movement in parts of County Antrim in the past. What you mostly find across County Antrim: red-brick terraces in Belfast, Victorian villas, and post-war and newer estates.
What happens when we carry out extension pulling away repairs in Belfast?
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.
Repair the junction
Drains are repaired first if they are leaking. The joint is then tied, formed as a movement joint or rebuilt after underpinning, with roof flashings reset so the junction stays watertight. Building control is handled where needed.
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.
Signs you may need extension pulling away repairs
- A vertical crack or gap where the extension meets the house
- Daylight or draughts showing through the internal corner joint
- Mastic or render at the joint repeatedly splitting open
How much will extension pulling away repairs cost in Belfast?
The ranges below reflect typical Northern Ireland costs for extension pulling away repairs, including VAT. Scaffold, access and making good can push a job to the top of the range.
| Item | Guide price | Per |
|---|---|---|
| Junction crack repair with stainless tiesest. | £530 – £1,750 | per junction |
| Movement joint and making goodest. | £350 – £1,050 | per junction |
| Underpinning the extension where needed | £880 – £2,200 | per metre of wall |
Which repair method suits a home in Belfast?
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
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
Rules for extension pulling away repairs in Northern Ireland
In Northern Ireland, the Building Regulations (Northern Ireland) 2012 apply and the council’s building control service approves structural work such as underpinning; minor like-for-like repairs usually need no approval. The Party Wall Act does not apply in Northern Ireland, so work to shared walls depends on deeds and agreement with neighbours.
Extension pulling away repairs in Belfast: questions and answers
What is the price of extension pulling away repairs in Belfast?
Guide prices for extension pulling away repairs in Belfast start from about £530 per junction, including VAT, on Northern Ireland 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 Belfast?
Yes, Belfast is covered, along with postcode districts BT1, BT2, BT7. We also cover nearby Newtownabbey and Lisburn.
Does the ground around Belfast cause cracking?
County Antrim is largely basalt over chalk, with soft estuarine 'sleech' along Belfast Lough that is notorious for settlement. Historic salt mining is recorded near Carrickfergus. 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.
Why is my extension pulling away from my house?
Usually because the extension and the house sit on different foundations that react differently to the ground. Shallow extension footings, leaking drains under the extension, nearby roots and weak tie-ins between old and new walls are the common causes.
More repairs we carry out in Belfast
- Structural surveys and crack monitoring
- Gable end wall repairs
- Bay window subsidence repairs
- Roof structure repairs
- Boundary and garden wall repairs
Extension pulling away repairs near Belfast
Call about the cracked extension junction at your Belfast property; a free initial assessment first, then a fixed written price once the repair is specified.