Bolton · Greater Manchester
Underpinning in Bolton
Before any underpinning goes ahead on a Bolton property, building control has to approve the design and inspect the excavations. Where the wall is shared, party wall notices may be needed too in England and Wales, so allow time for paperwork before the dig.
Guide price from£960per metre of wall inc VAT
- Postcodes
- BL1, BL2, BL3
- Population
- about 140,000
- Area
- Greater Manchester
- Pricing region
- North West
What is the ground like in Greater Manchester?
Bolton (BL1, BL2, BL3) has around 140,000 residents and sits in Greater Manchester. Neighbouring towns we cover: Westhoughton (4 miles), Radcliffe (5 miles) and Horwich (5 miles).
Clay soils are found in parts of Greater Manchester. Parts of Greater Manchester lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. What you mostly find across Greater Manchester: red-brick terraces, mill-town stone terraces, inter-war semis and post-war estates.
What happens during underpinning, step by step?
Engineer’s investigation
An independent chartered structural engineer studies the monitoring results, trial pits and soil tests, then decides whether underpinning is needed and which method suits. We can arrange the engineer if you do not already have one.
Fixed written price
With the design in hand we confirm a fixed price in writing, setting out the method, the length of wall, access arrangements and the making good. For insurance work we can price to the loss adjuster’s or engineer’s schedule.
Crack repairs and handover
Once the new foundation has cured, cracks are stitched and repointed, inside walls are made good, and paths or patios disturbed by the dig are reinstated. You receive the building control completion paperwork for your records.
What to look for before calling about underpinning
- Footings found to be very shallow during a trial pit
- One corner of the house visibly lower than the others
- A large tree nearby that cannot be removed or reduced
Underpinning prices in Bolton
These are guide prices for Bolton, using North West rates and including VAT. Your written quote follows photos or a survey, and is fixed once the repair is specified.
| Item | Guide price | Per |
|---|---|---|
| Mass-concrete underpinning | £960 – £1,450 | per metre of wall |
| Beam-and-base underpinning | £1,450 – £2,400 | per metre of wall |
| Mini-piled underpinning | £1,900 – £3,350 | per metre of wall |
| Engineer's design and building control feesest. | £770 – £2,400 | per scheme |
How we usually approach underpinning
Beam-and-base underpinning
A reinforced concrete beam is cast beneath or alongside the existing footing and carries the wall onto mass concrete bases at intervals. It spreads load well across variable ground and can mean less digging than continuous underpinning along the whole wall.
Best for: Longer runs of wall or heavier loads over variable ground
Mass concrete underpinning
The traditional method. Short sections under the wall are dug out in a set sequence, usually about a metre at a time, and filled with concrete before the next section is opened. It suits moderate depths and good access, and it needs little specialist plant.
Best for: Shallow failures on firm ground found at moderate depth
Rules for underpinning 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 underpinning in Bolton
What is the price of underpinning in Bolton?
Guide prices for underpinning in Bolton start from about £960 per metre of wall, including VAT, on North West rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Do you carry out underpinning in Bolton?
Yes. We take enquiries from across Bolton, including BL1, BL2, BL3, and from nearby places such as Westhoughton and Radcliffe. Send photos for a free initial view and we will tell you what happens next.
Does the ground around Bolton cause cracking?
Greater Manchester is mostly glacial till over sandstone and mudstone, with the Lancashire coalfield beneath much of Wigan, Bolton, Salford and parts of the east. Historic mine workings, made ground and old mill sites are common. Only an investigation can say why a particular building has moved.
Does underpinning need building control approval?
Yes, underpinning is building work and needs approval and inspections in England and Wales, a building warrant in Scotland, and council building control in Northern Ireland. Inspectors usually check the excavations before concrete is poured. We deal with building control as part of the job.
Which underpinning method is best?
The right method depends on how deep firm ground lies, the load on the wall and the access. Mass concrete suits moderate depths, beam-and-base spreads heavier loads, and mini-piles reach deep soft ground or work through tight access. The engineer chooses the method from the site investigation.
More repairs we carry out in Bolton
- Bowing wall repairs
- Bay window subsidence repairs
- Structural surveys and crack monitoring
- Subsidence repairs
- Concrete repairs
Underpinning near Bolton
If your insurer has agreed underpinning for your Bolton home, share the loss adjuster’s schedule and we will price the repair to it in writing.