Portsmouth · Hampshire
Retaining wall repairs in Portsmouth
Wondering whether a bowed garden wall in Portsmouth can be repaired or must come down? The answer depends on height, the size of the bulge and whether the footing has moved, and photos usually tell us which it is likely to be.
Guide price from£560per wall inc VAT
- Postcodes
- PO1, PO2, PO5
- Population
- about 210,000
- Area
- Hampshire
- Pricing region
- South East
What is the ground like in Hampshire?
Portsmouth is in Hampshire and takes in postcode districts PO1, PO2, PO5. About 210,000 people live there. If you are just outside Portsmouth, we also cover Fareham (5 miles), Hayling Island (5 miles) and Havant (6 miles).
Shrinkable clay is widespread in Hampshire. Ground movement here is more often linked to soils, drains and trees than to mining. What you mostly find across Hampshire: Victorian terraces in Portsmouth and Southampton, 1930s semis, and large post-war and new-build estates.
Signs you may need retaining wall repairs
- Wall leaning forward, or bulging out in the middle of its length
- Water seeping through joints, or white salt staining, after rain
- Ground cracking or sinking along the top of the wall
How much will retaining wall repairs cost in Portsmouth?
The ranges below reflect typical South East 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 | £560 – £2,250 | per wall |
| Structural repair or partial rebuild | £3,350 – £16,800 | per wall |
| New retaining wall | £225 – £505 | per m² of wall face |
Which repair method suits a home in Portsmouth?
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
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 happens when we carry out retaining wall repairs in Portsmouth?
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.
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.
Retaining wall repairs in Portsmouth: questions and answers
What is the price of retaining wall repairs in Portsmouth?
Guide prices for retaining wall repairs in Portsmouth start from about £560 per wall, including VAT, on South East rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you carry out retaining wall repairs in Portsmouth?
We do. Portsmouth and the surrounding area are covered, including nearby Fareham and Hayling Island. A free initial assessment from your photos is the first step.
Does the ground around Portsmouth cause cracking?
Central Hampshire is chalk, while the south around Portsmouth, Southampton and the New Forest fringe and the north-east around Farnborough sit on London Clay, Reading Beds and other clays and sands. The clay areas see seasonal movement near trees. Only an investigation can say why a particular building has moved.
How long does a retaining wall rebuild take?
Drainage and minor repairs usually take a day or two. Rebuilding a garden retaining wall on new footings typically takes one to three weeks, depending on its length, height, access for digging and any wait for the engineer’s design or inspections.
Can a bulging retaining wall be saved?
Sometimes, if the bulge is small, the wall is low and the cause is mainly poor drainage. Improving drainage and repairing the face may stop further movement. A wall that has bulged a lot, cracked through or moved at its base usually needs that section rebuilding on a proper footing.
More repairs we carry out in Portsmouth
- Structural crack repairs
- Wall tie replacement
- Lintel replacement
- Bay window subsidence repairs
- Structural surveys and crack monitoring
Retaining wall repairs near Portsmouth
For a guide price on retaining wall repairs in Portsmouth, use the quote tool or send photos with the wall’s rough height and what sits behind it.