Llantrisant · Mid Glamorgan
Subsidence repairs in Llantrisant
Cracks in a house in Llantrisant are not always subsidence, and subsidence is not always serious. The first job is to find out what is moving and why, whether that is a leaking drain, a nearby tree or soft ground under shallow footings.
Guide price from£2,300per property inc VAT

- Postcodes
- CF38, CF72
- Population
- about 14,000
- Area
- Mid Glamorgan
- Pricing region
- Wales
Why does the ground in Mid Glamorgan matter for subsidence repairs?
Postcode districts CF38, CF72 cover Llantrisant, a Mid Glamorgan town of about 14,000 people. Nearby, we also cover Pontypridd (4 miles), Tonypandy (7 miles) and Caerphilly (7 miles).
Parts of Mid Glamorgan have clay that can shrink near trees in dry spells. Historic coal workings are recorded beneath parts of Mid Glamorgan, and a coal mining search is worth checking where movement is unexplained. What you mostly find across Mid Glamorgan: long stone and brick terraces on valley sides, Victorian houses in Bridgend and post-war estates.
What happens when we carry out subsidence repairs in Llantrisant?
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.
Deal with the cause
Drains are repaired, vegetation is managed on the engineer’s advice, or a foundation scheme is designed if nothing else will work. Where monitoring is recommended, readings run for several months to show the movement has stopped.
Written quote
We price the agreed repair and confirm a fixed price in writing once it is specified. If there is an insurance claim, we can price to the loss adjuster’s or engineer’s schedule instead of our own scope.
Signs you may need subsidence repairs
- A gap opening between the skirting board and the floor
- Wallpaper rippling or tearing where the wall meets the ceiling
- Cracks that open in summer and partly close again in winter
How much will subsidence repairs cost in Llantrisant?
Guide prices below are for homes in Llantrisant, on Wales 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 | £460 – £1,850 | per property |
| CCTV drain survey (common first check) | £140 – £320 | per survey |
| Typical repair once the cause is dealt with: crack stitching and making goodest. | £2,300 – £11,000 | per property |
| Foundation strengthening where it is needed (see underpinning) | £920 – £3,200 | per metre of wall |
Which repair method suits a home in Llantrisant?
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
Remove the cause, then repair
Most subsidence is dealt with this way. The drain is repaired or the vegetation managed, the house is watched to confirm it has stabilised, and then the cracks are stitched, repointed and made good inside. It is the least disruptive route and usually the cheapest.
Best for: Clay movement or drain leaks where the cause can be removed
Rules for subsidence repairs in Wales
In Wales, the Welsh version of the Building Regulations applies. Underpinning and other work that alters or strengthens the structure needs building control approval and inspection; like-for-like repairs often do not. The Party Wall etc. Act 1996 applies to work on party walls and excavation close to a neighbour’s foundations.
Subsidence repairs in Llantrisant: questions and answers
How much will subsidence repairs cost in Llantrisant?
Guide prices for subsidence repairs in Llantrisant start from about £2,300 per property, including VAT, on Wales rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you cover Llantrisant?
We do. Llantrisant and the surrounding area are covered, including nearby Pontypridd and Tonypandy. A free initial assessment from your photos is the first step.
Is the ground in Mid Glamorgan prone to subsidence?
Mid Glamorgan lies on the South Wales coalfield, with dense historic workings, spoil tips and steep valley sides. Landslip, retaining walls and mining legacy are all live issues in the valleys. Only an investigation can say why a particular building has moved.
Should I cut down the tree near my house?
Not without advice, because felling a mature tree on clay can make things worse. As the roots stop drawing water, the clay swells and can lift the foundations, which is called heave. Pruning or staged removal may be advised instead. Check whether the tree is protected.
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.
Other structural repairs in Llantrisant
- Brick arch repairs
- Subsidence insurance claim repairs
- Chimney stack repairs
- Structural crack repairs
- Lintel replacement
Subsidence repairs near Llantrisant
Send photos of the cracks in your Llantrisant home, with something for scale, and we will give a free initial assessment and tell you the sensible next step.