Christchurch · Dorset
Retaining wall repairs in Christchurch
On sloping plots in Christchurch and across Dorset, many retaining walls were built decades ago with little thought for drainage. As the soil stays wet and roots grow, those walls start to lean, and the lean usually speeds up rather than slows.
Guide price from£515per wall inc VAT
- Postcodes
- BH6, BH7, BH23
- Population
- about 31,000
- Area
- Dorset
- Pricing region
- South West
What should you know about the ground under Christchurch?
Christchurch is in Dorset and takes in postcode districts BH6, BH7, BH23. About 31,000 people live there. We also take enquiries from nearby Bournemouth (4 miles), New Milton (5 miles) and Ferndown (7 miles).
Parts of Dorset have clay that can shrink near trees in dry spells. Ground movement here is more often linked to soils, drains and trees than to mining. Typical buildings in Dorset: Stone and brick villages, Victorian villas in Bournemouth, and inter-war and post-war semis.
What to look for before calling about retaining wall repairs
- No weep holes, or weep holes that never seem to drain
- Wall leaning forward, or bulging out in the middle of its length
- Ground cracking or sinking along the top of the wall
Retaining wall repairs prices in Christchurch
For Christchurch we use South West rates. Treat the table as a budget guide, inc VAT; the price you pay is the one on your written quote.
| Item | Guide price | Per |
|---|---|---|
| Minor repairs and drainage | £515 – £2,050 | per wall |
| Structural repair or partial rebuild | £3,100 – £15,400 | per wall |
| New retaining wall | £205 – £465 | per m² of wall face |
How we usually approach retaining wall repairs
Temporary support and reducing load
While a repair is designed and programmed, a dangerous wall may be propped, or soil and loads near the top removed to reduce the push. Moving parked cars or a shed back from the wall is sometimes the simplest first step.
Best for: Walls that are moving now and need making safe
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
What happens during retaining wall repairs, step by step?
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.
Build and drain
The failing section is taken down, the soil supported in short lengths, and the footing cast. The wall is rebuilt with drainage behind it, backfilled with free-draining material, and building control inspects where the work needs it.
Rules for retaining wall repairs in England
In England, underpinning and other work that alters or strengthens a wall or foundation is building work under the Building Regulations (Part A, structure), so building control approves and inspects it. Like-for-like repairs often are not, and we tell you which applies before a price is agreed. Work to a party wall, or excavation close to a neighbour’s foundations, can also need a notice under the Party Wall etc. Act 1996.
Questions about retaining wall repairs in Christchurch
How much will retaining wall repairs cost in Christchurch?
Guide prices for retaining wall repairs in Christchurch start from about £515 per wall, including VAT, on South West rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you cover Christchurch?
Yes, Christchurch is covered, along with postcode districts BH6, BH7, BH23. We also cover nearby Bournemouth and New Milton.
Is the ground in Dorset prone to subsidence?
Dorset mixes chalk downs, Oxford and Kimmeridge Clays in the vales, and the sands and gravels of the Poole basin. Clay vales can shrink and swell, and parts of the coast are known for landslip. 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.
What are weep holes in a retaining wall?
Weep holes are small openings near the base of a retaining wall that let water drain out from the soil behind it. Without them, water builds up and adds hydrostatic pressure that can push the wall over. They work best with a drainage layer behind the wall, and they need to be kept clear.
Other structural repairs in Christchurch
- Structural crack repairs
- Structural surveys and crack monitoring
- Bay window subsidence repairs
- Subsidence insurance claim repairs
- Crack stitching
Retaining wall repairs near Christchurch
Send photos of the whole wall and its end profile at your Christchurch property for a free initial assessment and a no-obligation written quote.