Building on Sidcup's varied terrain requires foundations that account for everything from London clay to the occasional chalk deposit. Local knowledge matters when you're digging deep.
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Those Victorian terraces along Main Road weren't built on guesswork – their foundations have lasted over a century. Today's building regulations demand even more precision, particularly given Sidcup's mix of soil conditions. Whether you're extending a 1930s semi or constructing a modern garage, the groundwork sets the tone for decades to come.
Strip foundations suit most domestic projects here, typically reaching 1-1.2 metres to bypass the shrinkable clay layer. Trench fill becomes essential where mature oak trees line property boundaries – their roots can wreak havoc on shallow concrete. Raft foundations prove their worth on sloping sites towards Foots Cray, distributing loads evenly across unstable ground.
Twenty years of digging through Sidcup gardens teaches you which streets hide old wells and where Victorian builders dumped their rubble. That's experience you won't find in a textbook.
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Single-storey extensions generally range from £3,500-£6,000, while double-storey projects start around £7,500. Sites with access restrictions or significant tree coverage may require additional groundwork costs.
Absolutely – from the leafy streets of DA14 near Chislehurst borders to the busier areas of DA15 towards Bexley. We've worked on everything from Edwardian properties near Sidcup station to newer developments off the A20.
Standard residential foundations usually complete within 5-8 working days, including excavation and concrete curing time. Complex sites with poor access might extend to two weeks.
Each foundation project carries a decade-long structural warranty, backed by proper building control sign-off. We document every stage from excavation depth to concrete mix specifications.
Underpinning often proves more practical than full replacement, especially for subsidence issues common near Sidcup's tree-lined streets. Mini-pile solutions work brilliantly where traditional underpinning access proves difficult.
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