Sidcup's clay-heavy ground presents unique challenges when laying foundations. Whether you're extending your Victorian terrace or adding a garden room to your 1930s semi, solid footings are essential for lasting stability.
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Foundation work in Sidcup requires particular attention to the area's London clay subsoil. Many properties between Halfway Street and Foots Cray experience seasonal ground movement that can compromise poorly designed footings. Local building regulations reflect these conditions, demanding specific depths and reinforcement standards that vary from plot to plot.
Strip foundations typically suffice for single-storey extensions on stable ground near Lamorbey Park. However, properties backing onto the Cray Valley often require deeper trench fill foundations due to tree proximity and moisture variations. Reinforced concrete rafts become necessary where ground conditions prove particularly challenging, especially in older parts of DA15 where Victorian drainage can affect soil stability.
Twenty years of working across Sidcup means understanding which streets suffer from subsidence issues and where tree preservation orders affect foundation design. Local building control officers know our work meets their stringent requirements first time.
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Basic strip foundations for a small extension start around £3,000-£4,500. Larger projects requiring trench fill or raft foundations typically range £6,000-£12,000 depending on ground conditions and footprint size.
Yes, from the Oval through to Sidcup Place, covering all of DA14 and DA15. This includes Chislehurst borders, areas near Queen Mary's Hospital, and properties along the A20.
Most domestic foundation projects complete within 5-10 working days, including excavation, concrete pour and curing time. Complex sites with difficult access may extend to 3 weeks.
All structural foundation work carries our decade-long guarantee against settlement or structural failure. This comprehensive coverage includes annual inspections for the first two years.
Absolutely. Many Sidcup homes built before 1940 have shallower foundations than modern standards require. We carefully assess existing footings and design compatible solutions that tie new and old structures together safely.
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