Streatham's mix of Victorian terraces and 1930s semis sits on notoriously tricky London clay. Getting your footings right here isn't just about digging a hole - it's about understanding how our local ground conditions affect your project long-term.
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Those beautiful period properties along Streatham High Road? Many need underpinning after decades of movement in our clay-heavy soil. Whether you're extending a Victorian terrace near Streatham Common or building from scratch in Furzedown, the foundation work sets everything else in motion. Local knowledge matters when you're dealing with tree roots from mature plane trees and the water table variations between the hill and common areas.
Foundation depth in SW16 typically runs 1.2-2.5 metres, depending on proximity to established trees and soil surveys. Strip footings suit most domestic extensions here, though raft foundations occasionally prove necessary where neighbouring properties share party walls. Clay shrinkage remains the biggest challenge - particularly during dry summers when established street trees draw moisture from already reactive ground.
Twenty years working between Tooting Bec and Norbury means recognising patterns others might miss. That slight slope towards Streatham Hill? Changes everything about water management and foundation design.
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Single-storey rear extensions generally require £8,000-£15,000 for foundation work, while double-storey projects run £15,000-£25,000. Victorian properties often need additional underpinning work, adding £10,000-£20,000 to costs.
Absolutely - from the conservation areas around Streatham Common station to the residential streets of Furzedown. Regular projects across SW16 and SW2, including Streatham Hill's period conversions.
Most residential foundations complete within 2-3 weeks, weather permitting. Underpinning existing Victorian properties adds another 3-4 weeks, especially when working around party wall agreements.
Each foundation project includes decade-long structural warranty coverage, backed by insurance-backed guarantees. All work meets current building control standards with certification provided.
Narrow side returns and limited rear access define many SW16 properties. Compact excavators and careful planning mean even the tightest plots remain workable - we've managed foundations through 900mm gaps between properties.
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