Carrickfergus · County Antrim
Retaining wall repairs in Carrickfergus
A garden retaining wall in Carrickfergus holds back far more weight than it looks, and the push increases every time the soil behind it gets wet. Most leaning or bulging walls turn out to have poor drainage, thin construction or shallow footings, often all three.
Guide price from£440per wall inc VAT
- Postcodes
- BT38
- Population
- about 29,000
- Area
- County Antrim
- Pricing region
- Northern Ireland
Is County Antrim prone to ground movement?
Carrickfergus (BT38) has around 29,000 residents and sits in County Antrim. We also take enquiries from nearby 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. What you mostly find across County Antrim: red-brick terraces in Belfast, Victorian villas, and post-war and newer estates.
Repair options we may recommend
Structural repair and partial rebuild
A leaning or bulging section is taken down, the soil behind dug out and supported, and the wall rebuilt on a new footing with drainage and, where specified, reinforcement tied into the sound wall either side. The engineer’s design sets footing size and wall thickness.
Best for: A section that has moved while the rest stays sound
Rebuilding on new footings
Where the whole wall is failing, it is replaced with a new retaining wall on a properly sized footing, with free-draining backfill, a membrane, weep holes and a drain at the base. Reinforced blockwork faced in brick or stone is common, so the wall matches its surroundings.
Best for: Walls failing along their length, or retaining significant height
What to expect when we carry out retaining wall repairs
Photos and measurements
Send photos of the whole wall from the front and the end, so any lean shows, plus close-ups of cracks and weep holes. Tell us roughly how tall it is and what sits at the top, such as lawn, patio, drive or a building.
Engineer’s design
Where the wall needs it, an independent chartered structural engineer is appointed to design the repair or new wall, including footing, thickness, reinforcement and drainage. We can arrange this, and the design forms the basis of the quote.
Written quote
You receive a no-obligation written quote covering demolition, excavation, temporary support, the footing, the new or repaired wall, drainage and spoil removal. It becomes a fixed price in writing once the repair is specified.
Is it time for retaining wall repairs? Common signs
- Water seeping through joints, or white salt staining, after rain
- No weep holes, or weep holes that never seem to drain
- Ground cracking or sinking along the top of the wall
What should you budget for retaining wall repairs in Carrickfergus?
The ranges below reflect typical Northern Ireland costs for retaining wall repairs, including VAT. Scaffold, access and making good can push a job to the top of the range.
| Item | Guide price | Per |
|---|---|---|
| Minor repairs and drainage | £440 – £1,750 | per wall |
| Structural repair or partial rebuild | £2,650 – £13,200 | per wall |
| New retaining wall | £175 – £395 | per m² of wall face |
Rules for retaining wall 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 retaining wall repairs questions
How much will retaining wall repairs cost in Carrickfergus?
Guide prices for retaining wall repairs in Carrickfergus start from about £440 per wall, 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?
Yes, Carrickfergus is covered, along with postcode districts BT38. We also cover nearby Newtownabbey and Larne.
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.
Who is responsible for a retaining wall between two properties?
Usually the owner of the higher ground, because the wall holds up their land, but it depends on your title deeds and how the wall came to be built. Check the deeds first, take advice if it is unclear, and agree the repair with your neighbour before work starts.
Is a leaning retaining wall dangerous?
It can be, especially if the lean is getting worse, the wall is tall, or there is a path, drive or building next to it. A wall that has leaned slightly for decades may be stable, but one that has moved recently should be kept clear and assessed soon.
Other structural repairs in Carrickfergus
- Subsidence repairs
- Concrete repairs
- Bowing wall repairs
- Chimney stack repairs
- Extension pulling away repairs
Retaining wall repairs near Carrickfergus
For a guide price on retaining wall repairs in Carrickfergus, use the quote tool or send photos with the wall’s rough height and what sits behind it.