Preston · Lancashire
Underpinning in Preston
Most underpinning in Preston, as elsewhere, is partial, strengthening one corner or a single wall rather than the whole house. The engineer plans how the new foundation meets the old so that the junction does not become the next place to crack.
Guide price from£960per metre of wall inc VAT
- Postcodes
- PR1, PR2
- Population
- about 310,000
- Area
- Lancashire
- Pricing region
- North West
What is the ground like in Lancashire?
Postcode districts PR1, PR2 cover Preston, a Lancashire town of about 310,000 people. We also take enquiries from nearby Leyland (5 miles), Chorley (9 miles) and Blackburn (9 miles).
Lancashire has a mix of ground, with clay in some places and firmer rock in others. Parts of Lancashire lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. Typical buildings in Lancashire: Stone and brick mill terraces, seaside villas in Blackpool and Lytham, and inter-war and post-war semis.
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
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.
Excavation and concrete
Work runs in the sequence the engineer sets so the wall is never left unsupported over a long length. Building control inspects the excavations before concrete goes in, and each section is dry-packed tight to the footing above.
What to look for before calling about underpinning
- One corner of the house visibly lower than the others
- Movement continuing through more than one winter of monitoring
- A large tree nearby that cannot be removed or reduced
Underpinning prices in Preston
For Preston 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 |
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 Preston
How much should I budget for underpinning in Preston?
Guide prices for underpinning in Preston 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.
Can you survey a property in Preston?
Yes. We take enquiries from across Preston, including PR1, PR2, and from nearby places such as Leyland and Chorley. Send photos for a free initial view and we will tell you what happens next.
Why do houses in Lancashire crack?
Lancashire is mostly glacial till over sandstone and mudstone, with the Burnley and Accrington coalfield in the east and soft coastal and estuarine ground on the Fylde. Old mill and mine sites leave made ground in many towns. Only an investigation can say why a particular building has moved.
Do I need to tell my neighbours about underpinning?
In England and Wales you usually do. Underpinning a party wall normally needs two months’ notice, and excavating near a neighbour’s foundations needs one month’s notice under the Party Wall etc. Act 1996. Scotland and Northern Ireland have no equivalent Act, but agreeing the work in writing still helps.
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.
Related work in Preston
- Bowing wall repairs
- Gable end wall repairs
- Concrete repairs
- Mining subsidence repairs
- Brick arch repairs
Underpinning near Preston
Call or send photos about your Preston property, and we will explain the likely method, the approvals involved and a guide price before anything is booked.