Those Victorian terraces along Putney Hill weren't built to handle modern extensions and basement conversions. Whether you're excavating for a new garden room or sorting decades-old drainage issues, proper groundworks make all the difference.
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Putney's mix of period properties and riverside developments each bring their own underground challenges. Clay soil near the Thames, old Victorian pipework, and the occasional forgotten air raid shelter - we've encountered it all digging beneath SW15's gardens. From simple patio bases to complex basement waterproofing, every project starts with understanding what lies beneath your property.
Modern groundworks go far beyond just shifting earth. Ground-penetrating radar helps locate utilities before breaking ground. Precision excavation protects neighbouring foundations, particularly crucial when working between Putney's tightly-packed terraces. Proper membrane installation prevents future damp issues, while calculated gradients ensure rainwater flows away from your home, not towards it.
Twenty years working beneath Putney's streets means knowing which areas flood during heavy rain and where the old brook used to run through Roehampton. Local knowledge matters when you're digging foundations - it's the difference between a job that lasts and one that shifts with the seasons.
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Basic drainage improvements start around £3,000-£5,000, while full excavation for a rear extension typically runs £8,000-£15,000. Basement conversions requiring underpinning can reach £25,000-£40,000, depending on soil conditions and access restrictions common in SW15's narrower streets.
Absolutely - from the riverside properties near Putney Bridge to the larger plots up in Putney Heath. We regularly work across SW15, including the conservation areas around West Putney where careful excavation is essential.
Simple foundation digs typically take 3-5 days, while comprehensive drainage overhauls might need 2-3 weeks. Basement projects run longer - usually 6-10 weeks including waterproofing and structural work.
All structural groundworks carry our decade-long guarantee, covering settlement, water ingress, and foundation integrity. This includes annual checks for the first two years - particularly important given SW15's variable soil conditions.
Yes, many Putney gardens have protected trees requiring specialist root-protection zones. We use hand-digging near root systems and install barriers to prevent long-term damage, ensuring compliance with Wandsworth's tree preservation requirements.
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