Holywood · County Down
Extension pulling away repairs in Holywood
Rear and side extensions are common across Holywood, 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£530per junction inc VAT
- Postcodes
- BT18
- Population
- about 13,000
- Area
- County Down
- Pricing region
- Northern Ireland
Is County Down prone to ground movement?
We cover Holywood and its postcode districts BT18, part of County Down, with a population of roughly 13,000. If you are just outside Holywood, we also cover Newtownards (6 miles), Bangor (6 miles) and Downpatrick (22 miles).
Shrinkable clay is less common in County Down than in south-east England. Ground movement here is more often linked to soils, drains and trees than to mining. What you mostly find across County Down: Victorian seaside houses in Bangor and Holywood, brick terraces and post-war estates.
What happens when we carry out extension pulling away repairs in Holywood?
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.
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.
Signs you may need extension pulling away repairs
- A vertical crack or gap where the extension meets the house
- Mastic or render at the joint repeatedly splitting open
- Extension roof flashing lifting off the original wall
How much will extension pulling away repairs cost in Holywood?
Guide prices below are for homes in Holywood, on Northern Ireland rates and including VAT. A survey or good photos let us turn them into a fixed written price.
| 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 Holywood?
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 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 Holywood: questions and answers
How much will extension pulling away repairs cost in Holywood?
Guide prices for extension pulling away repairs in Holywood 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 cover Holywood?
We do. Holywood and the surrounding area are covered, including nearby Newtownards and Bangor. A free initial assessment from your photos is the first step.
Is the ground in County Down prone to subsidence?
County Down is mostly drumlin till over older rock and granite in the Mournes, with soft estuarine ground around Belfast Lough and Strangford. Only an investigation can say why a particular building has moved.
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.
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.
Other structural repairs in Holywood
- Floor joist repairs
- Brick arch repairs
- Chimney stack repairs
- Structural surveys and crack monitoring
- Crack stitching
Extension pulling away repairs near Holywood
Photos of the crack, the internal corner and the roof flashing are a good start; send them about your Holywood home and we will reply with a view.