Greater Manchester · England
Underpinning in Greater Manchester
If you live in Greater Manchester and are looking at underpinning, the first question is why the wall moved. Greater Manchester has a mix of ground, with clay in some places and firmer rock in others; parts of Greater Manchester lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause.
Guide price from£960per metre of wall inc VAT
- Area
- Greater Manchester
- Pricing region
- North West
- Ground
- Clay in parts
- Towns listed
- 23
Why does the ground in Greater Manchester matter for underpinning?
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.
Parts of Greater Manchester lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. Across Greater Manchester, most homes are red-brick terraces, mill-town stone terraces, inter-war semis and post-war estates.
How we usually approach underpinning
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
Mini-piled underpinning
Small-diameter piles are driven or bored down to firm ground and linked by a reinforced beam or needles that pick up the wall. Compact rigs fit through narrow access, and the method reaches depths that would be impractical to excavate by hand.
Best for: Deep soft ground, tree roots, or restricted access
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
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.
Design and approvals
The engineer produces drawings and calculations. We make the building control or building warrant application, and party wall notices are served where the law requires them, before any digging starts.
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.
What to look for before calling about underpinning
- A large tree nearby that cannot be removed or reduced
- Footings found to be very shallow during a trial pit
- Movement continuing through more than one winter of monitoring
- One corner of the house visibly lower than the others
Underpinning prices in Greater Manchester
For Greater Manchester we use North 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 |
|---|---|---|
| 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 |
Do you need approval 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.
Find underpinning in your Greater Manchester town
- Manchester
- Oldham
- Wigan
- Bolton
- Stockport
- Salford
- Rochdale
- Sale
- Bury
- Altrincham
- Middleton
- Ashton-under-Lyne
- Leigh
- Tyldesley
- Hyde
- Radcliffe
- Cheadle Hulme
- Ashton-in-Makerfield
- Westhoughton
- Hindley
- Irlam
- Horwich
- Ramsbottom
Questions about underpinning in Greater Manchester
Why do houses in Greater Manchester crack?
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. Parts of Greater Manchester lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. Only an investigation on site can say why a particular building has moved.
How much will underpinning cost in Greater Manchester?
On North West rates, underpinning starts from about £960 per metre of wall, including VAT. The written price depends on the extent of the damage, access and whether an engineer or building control is needed.
Can I stay in my house during underpinning?
Most people stay at home during external underpinning, because the digging happens outside along the wall. Expect noise, restricted access to that side of the house and some dust. If the work has to be done from inside, through the floor, moving out for part of the job is sometimes advised.
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.
Does my house really need underpinning?
Often not, because most subsidence is fixed by repairing drains or managing trees and then repairing the cracks. Underpinning is justified when monitoring shows movement continuing after the cause has been dealt with, or when the ground itself is unsuitable. An independent engineer should make that call.