Northern Ireland
Structural repairs in County Londonderry
Structural repairs across County Londonderry: subsidence, cracks, underpinning, wall ties, lintels and claim repairs. Clay shrinkage is less of a concern in County Londonderry, so other causes such as drains, poor footings or older walls are checked first.
- Nation
- Northern Ireland
- Pricing region
- Northern Ireland
- Towns listed
- 4
- Mining legacy
- Not a major factor
What is the ground like in County Londonderry?
County Londonderry has basalt, older hard rock and glacial deposits, with soft river ground along the Foyle and Bann.
Ground movement here is more often linked to soils, drains and trees than to mining.
What usually causes cracking in County Londonderry?
In County Londonderry, cracking usually comes back to one of these. We rule each in or out before recommending a repair.
- Loose or saturated ground where water has collected around foundations
- Bay windows built on shallower footings than the main walls
- Shallow footings and corroded wall ties in older brick houses
- Garden and boundary walls leaning as tree roots and frost get to them
- Extensions and bays moving differently from the main house
What kind of buildings are common here?
Georgian and Victorian houses in Derry, brick terraces and post-war estates.
Which repairs do we carry out in County Londonderry?
- Concrete repairs
- Subsidence insurance claim repairs
- Underpinning
- Boundary and garden wall repairs
- Bay window subsidence repairs
- Wall tie replacement
- Roof structure repairs
- Resin injection ground stabilisation
- Brick arch repairs
- Lintel replacement
- Bowing wall repairs
- Gable end wall repairs
- Crack stitching
- Chimney stack repairs
- Subsidence repairs
- Floor joist repairs
- Structural surveys and crack monitoring
- Extension pulling away repairs
- Structural crack repairs
- Retaining wall repairs
Guide prices in County Londonderry
A selection of guide prices on Northern Ireland rates, including VAT. Each repair page has the full table.
| Item | Guide price | Per |
|---|---|---|
| Crack stitching: crack stitching with stainless helical bars | £70 – £160 | per metre of crack |
| Wall tie replacement: semi-detached house | £2,200 – £4,400 | per house |
| Bowing wall repairs: lateral restraint for a typical gable | £880 – £2,650 | per wall |
| Structural surveys and crack monitoring: structural engineer's inspection and report | £440 – £1,750 | per property |
Towns we cover in County Londonderry
We list 4 towns in County Londonderry, covering 4 postcode districts in the BT postcode area. The largest are Derry (about 84,000 people), Coleraine (about 26,000 people) and Limavady (about 11,000 people). Each town page has local postcodes, nearby places and the repairs we carry out there.
Do repairs in County Londonderry need approval?
Underpinning in Northern Ireland needs council building control approval. There is no Party Wall Act in Northern Ireland.
Questions about structural repairs in County Londonderry
Do you cover the whole of County Londonderry?
Yes. We take enquiries from across County Londonderry, including Derry, Coleraine, Limavady and Magherafelt. A free initial assessment from your photos is the first step.
Is County Londonderry affected by subsidence?
Most of County Londonderry is on firmer ground than the clay belts of the south-east. Ground movement here is more often linked to soils, drains and trees than to mining. Whether a particular building has moved, and why, needs an investigation on site.
How much do structural repairs cost in County Londonderry?
It depends on the repair. On Northern Ireland rates, crack stitching from about £70 per metre of crack and lateral restraint for a bowing gable from about £880 per wall, including VAT. Your written price follows photos or a survey.
What should I send for a free assessment in County Londonderry?
Photos of each crack inside and out with a coin or tape for scale, a wider shot showing where it is on the building, your postcode in County Londonderry, and when you first noticed it. If an insurer is involved, include the claim reference.