Craigavon · County Armagh
Bay window subsidence repairs in Craigavon
Bay windows are a feature of many older streets in Craigavon, and so is the crack where a bay meets the front wall. Often it reflects a shallower bay footing reacting to the ground, rather than a problem with the whole house.
Guide price from£530per bay inc VAT

- Postcodes
- BT64, BT65, BT66
- Population
- about 59,000
- Area
- County Armagh
- Pricing region
- Northern Ireland
What should you know about the ground under Craigavon?
We cover Craigavon and its postcode districts BT64, BT65, BT66, part of County Armagh, with a population of roughly 59,000. Nearby, we also cover Portadown (3 miles), Banbridge (8 miles) and Armagh (13 miles).
Clay shrinkage is less of a concern in County Armagh, so other causes such as drains, poor footings or older walls are checked first. Ground movement here is more often linked to soils, drains and trees than to mining. Across County Armagh, most homes are Georgian houses in Armagh, brick terraces in Portadown and Lurgan, and post-war estates.
What should you budget for bay window subsidence repairs in Craigavon?
Prices in Craigavon are worked out on Northern Ireland rates. They include VAT and are a starting point: access, the extent of the damage and whether an engineer or building control is involved all move the figure.
| Item | Guide price | Per |
|---|---|---|
| Bay junction crack repair and tie-inest. | £530 – £1,600 | per bay |
| Traditional underpinning of a bay | £2,650 – £6,150 | per bay |
| Mini-piled bay underpinning | £4,400 – £10,600 | per bay |
Repair options we may recommend
Junction crack repair and tie-in
Where movement has stopped, the open joint between bay and house is raked out, stainless ties or helical bars are fixed across it, and the joint is repointed to match. Internal plaster along the crack is cut back and renewed before redecoration.
Best for: Old, stable cracks where the bay is no longer moving
Mini-piled bay underpinning
Small piles are installed to depth around or beneath the bay and linked by a reinforced beam or needles that pick up its weight. It suits deeper soft ground and heavy root activity, and the compact rigs fit into a front garden.
Best for: Deep clay, nearby trees, or poor ground below the bay
What to expect when we carry out bay window subsidence repairs
Photos and first view
Send photos of the outside junction, the inside corners and the window, with a scale. We give a free initial assessment and tell you whether the crack looks old and stable or whether an engineer should inspect first.
Engineer and checks
Where the cause is unclear, an independent chartered structural engineer inspects, sometimes with a trial pit at the bay and a drain survey. We can arrange the engineer. Monitoring may be suggested if the movement could be seasonal.
Carry out the work
Ties are fitted across the junction, or the bay is underpinned in sequence with building control inspecting the dig. The bay window and flashings are checked and eased or resealed where the movement has disturbed them.
Is it time for bay window subsidence repairs? Common signs
- Bay roof or lead flashing pulling away from the main wall
- Gaps opening around the internal bay window board
- A step or slope in the bay floor towards the window
Rules for bay window subsidence 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.
Your bay window subsidence repairs questions
How much will bay window subsidence repairs cost in Craigavon?
Guide prices for bay window subsidence repairs in Craigavon start from about £530 per bay, 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 Craigavon?
Yes. We take enquiries from across Craigavon, including BT64, BT65, BT66, and from nearby places such as Portadown and Banbridge. Send photos for a free initial view and we will tell you what happens next.
Is the ground in County Armagh prone to subsidence?
County Armagh has glacial drumlin till over older rock, with soft ground and peat near Lough Neagh. Only an investigation can say why a particular building has moved.
Does a bay window always need underpinning?
No, many bays are fixed by tying the junction and repointing, once any cause such as a leaking gully is put right. Underpinning is for bays still dropping after the cause has been dealt with, or with footings too shallow for the ground they sit on.
Can I just fill the crack myself?
Filling it hides the evidence without dealing with the cause, and if the bay is still moving the crack will reopen. Photograph it with a scale and date first. If you plan to claim on insurance, tell your insurer before any repair, including filling.
Other structural repairs in Craigavon
- Chimney stack repairs
- Bowing wall repairs
- Crack stitching
- Structural crack repairs
- Retaining wall repairs
Bay window subsidence repairs near Craigavon
Send photos of the bay junction inside and out at your Craigavon home for a free initial assessment and a guide price.