Bromley · Greater London
Underpinning in Bromley
Homeowners in Bromley often ask whether underpinning can be avoided, and in many cases it can. When movement continues after drains and trees have been dealt with, a well-designed scheme carries the house down to ground that no longer shifts with the seasons.
Guide price from£1,250per metre of wall inc VAT
- Postcodes
- BR1, BR2, BR4, BR5, BR6
- Population
- about 330,000
- Area
- Greater London
- Pricing region
- London
What should you know about the ground under Bromley?
Bromley is one of the 32 London boroughs, with around 330,000 residents in districts such as BR1, BR2, BR4, BR5, BR6. We also take enquiries from nearby Swanley (5 miles), Lewisham (5 miles) and Croydon (6 miles).
Greater London is one of the parts of the UK where clay soils are most likely to move with the seasons. Ground movement here is more often linked to soils, drains and trees than to mining. What you mostly find across Greater London: Victorian and Edwardian terraces with shallow footings, inter-war semis in the outer boroughs, and converted flats and mansion blocks.
Which repair method suits a home in Bromley?
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 when we carry out underpinning in Bromley?
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.
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.
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.
Signs you may need underpinning
- Cracks that keep widening after the drains have been repaired
- A large tree nearby that cannot be removed or reduced
- Footings found to be very shallow during a trial pit
How much will underpinning cost in Bromley?
These are guide prices for Bromley, using London 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 | £1,250 – £1,900 | per metre of wall |
| Beam-and-base underpinning | £1,900 – £3,100 | per metre of wall |
| Mini-piled underpinning | £2,500 – £4,400 | per metre of wall |
| Engineer's design and building control feesest. | £1,000 – £3,100 | 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.
Underpinning in Bromley: questions and answers
What is the price of underpinning in Bromley?
Guide prices for underpinning in Bromley start from about £1,250 per metre of wall, including VAT, on London 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 Bromley?
Yes, Bromley is covered, along with postcode districts BR1, BR2, BR4, BR5. We also cover nearby Swanley and Lewisham.
Does the ground around Bromley cause cracking?
Most of Greater London sits on London Clay, among the most shrinkage-prone ground in the UK, with river gravels along the Thames. Subsidence claims here are among the most frequent in the country, especially after dry summers and near street and garden trees. Only an investigation can say why a particular building has moved.
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.
Will underpinning affect selling my house?
It needs explaining to buyers, but a properly documented scheme is far better than unresolved movement. Keep the engineer’s design, the building control completion certificate and any insurance paperwork. Lenders and surveyors will usually ask for these before agreeing a sale.
More repairs we carry out in Bromley
Underpinning near Bromley
Call or send photos about your Bromley property, and we will explain the likely method, the approvals involved and a guide price before anything is booked.