Those Victorian terraces in Dulwich weren't built on a whim – their foundations have stood firm for over a century. When you're planning that kitchen extension or tackling subsidence issues, getting the groundwork right matters more than ever.
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Foundation work in SE21, SE22 and SE24 presents unique challenges. Many properties sit on London clay, which shifts with the seasons, whilst others rest on gravel beds near old river courses. Understanding these local ground conditions shapes every project, from simple conservatory bases to full underpinning jobs. Years of working beneath Dulwich's period properties have taught us that no two foundations tell quite the same story.
Strip foundations remain popular for extensions here, typically reaching 1-1.2 metres deep to bypass the worst of clay movement. Raft foundations suit trickier spots where trees complicate matters – particularly relevant given Dulwich's leafy character. Mini-pile solutions tackle the really challenging sites, driving deep past problematic layers. Each method has its moment, determined by soil tests and structural engineer calculations rather than guesswork.
Local building control officers know our work across East Dulwich, West Dulwich and Herne Hill. That familiarity speeds approvals and keeps projects moving. Trust comes from consistent quality, not promises.
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Single-storey extension foundations generally run £3,000-£6,000 depending on ground conditions. Full underpinning starts around £15,000 for a terraced house. Complex sites with poor access or tree roots can push costs higher. We'll survey first and quote accurately.
Absolutely – from the conservation areas of West Dulwich to the busier streets of East Dulwich. Regular projects span all three postcodes (SE21, SE22, SE24) plus neighbouring Herne Hill. Local knowledge counts when navigating planning restrictions and access challenges.
Strip foundations typically cure sufficiently within 7-10 days. Excavation and concrete pour usually complete in 2-3 days for standard extensions. Weather and inspections can add time, but most foundations are builder-ready within a fortnight.
All structural foundation work carries our decade-long guarantee, backed by proper insurance. This covers both materials and workmanship, giving real peace of mind for what's essentially your home's most critical element. Documentation provided for mortgage and insurance purposes.
Modern underpinning techniques allow targeted reinforcement with minimal upheaval. We work in sections, supporting the structure whilst strengthening below. Many Dulwich properties have benefited from this approach, addressing movement without requiring families to move out. Each case needs careful assessment first.
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