Carrickfergus · County Antrim
Subsidence repairs in Carrickfergus
If doors have started sticking in your Carrickfergus home and new cracks have appeared, it is worth acting before they widen. We can look at photos first and tell you whether an engineer, a drain survey or your insurer should be the next call.
Guide price from£2,200per property inc VAT
- Postcodes
- BT38
- Population
- about 29,000
- Area
- County Antrim
- Pricing region
- Northern Ireland
What should you know about the ground under Carrickfergus?
Postcode districts BT38 cover Carrickfergus, a County Antrim town of about 29,000 people. Nearby, we also cover Newtownabbey (6 miles), Larne (9 miles) and Belfast (10 miles).
Clay shrinkage is less of a concern in County Antrim, so other causes such as drains, poor footings or older walls are checked first. Historic brine and salt working has caused ground movement in parts of County Antrim in the past. Typical buildings in County Antrim: Red-brick terraces in Belfast, Victorian villas, and post-war and newer estates.
From first photo to finished repair
Send photos or call
Send photos of the cracks with a coin or tape for scale, and say when you first noticed them. We give a free initial assessment and suggest whether an engineer, a drain survey or your insurer comes first.
Find the cause
An independent chartered structural engineer inspects the house and, where needed, arranges a drain survey, trial pits or soil tests. We can arrange the engineer. The aim is to know what is moving, and why, before money goes on repairs.
Repairs and making good
Cracks are stitched and repointed outside, plaster is renewed along the crack lines inside, and sticking doors are eased. Where the work needs it, we deal with building control and hand over the paperwork.
Symptoms that point to subsidence repairs
- Diagonal cracks wider at the top, running from window or door corners
- A gap opening between the skirting board and the floor
- Cracks that open in summer and partly close again in winter
Guide prices for subsidence repairs in Carrickfergus
Guide prices below are for homes in Carrickfergus, 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 |
|---|---|---|
| Structural engineer's investigation and report | £440 – £1,750 | per property |
| CCTV drain survey (common first check) | £130 – £310 | per survey |
| Typical repair once the cause is dealt with: crack stitching and making goodest. | £2,200 – £10,600 | per property |
| Foundation strengthening where it is needed (see underpinning) | £880 – £3,100 | per metre of wall |
Methods for subsidence repairs
Foundation strengthening
Where the ground cannot be made stable, the load is carried down to firmer soil by underpinning, a beam-and-base scheme, mini-piles or resin injection, depending on the soil and access. It is designed by an engineer and is the exception, not the rule.
Best for: Ongoing movement where removing the cause has not worked
Crack stitching and making good
Once movement has stopped, cracked brickwork is cut along the bed joints, stainless helical bars are bonded in to tie the wall together, and the joints are repointed to match. Inside, plaster is renewed along the crack line before redecoration.
Best for: Category 1 to 3 cracking in walls that are otherwise sound
Rules for 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.
Frequently asked questions
How much will subsidence repairs cost in Carrickfergus?
Guide prices for subsidence repairs in Carrickfergus start from about £2,200 per property, 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 Carrickfergus?
We do. Carrickfergus and the surrounding area are covered, including nearby Newtownabbey and Larne. A free initial assessment from your photos is the first step.
Is the ground in County Antrim prone to subsidence?
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.
Will past subsidence affect my home insurance?
It can, because insurers ask about previous subsidence at renewal or when you switch. Staying with the insurer who handled a claim is often simplest. Answer any new insurer’s questions honestly and keep the repair records, which show the problem was dealt with.
How long should I wait before repairing subsidence cracks?
Usually until the cause has been dealt with and the engineer is satisfied that movement has stopped. On clay that can mean watching the house through a summer and a winter. Repairing too early risks the same cracks opening again.
Other structural repairs in Carrickfergus
- Subsidence insurance claim repairs
- Bay window subsidence repairs
- Floor joist repairs
- Gable end wall repairs
- Brick arch repairs
Subsidence repairs near Carrickfergus
Worried about movement at your Carrickfergus property? Share photos or ring for a free initial assessment before you spend anything on investigations.