Victorian terraces line Thornton Heath's streets, each requiring careful attention when extending or renovating. From Brigstock Road's period properties to newer developments near Bensham Manor, proper groundwork determines whether your project stands the test of time.
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CR7's clay-heavy soil presents unique challenges for structural work. Properties between the High Street and Whitehorse Road often sit on London clay that shifts seasonally, making foundation depth calculations critical. Years of working across Thornton Heath have taught us which areas need deeper excavations and where tree roots from mature plane trees might complicate matters.
Strip foundations suit most Thornton Heath extensions, though some properties near the railway lines benefit from reinforced raft designs. Ground investigation determines whether standard 1-metre depths suffice or if subsidence-prone zones require engineering solutions. Concrete mix specifications vary based on soil conditions – particularly important given the area's mix of Victorian foundations and post-war infill developments.
Local building control officers know our work throughout CR7 and neighbouring Selhurst. Twenty years establishing foundations across South London means understanding exactly what inspectors expect, streamlining approvals for homeowners.




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Single-storey rear extensions generally require £3,500-£5,500 for foundations, while double-storey projects range £6,000-£9,000. Victorian properties with party wall considerations may add £1,000-£2,000 to costs.
Absolutely – from Grangewood Park to Norbury Brook, including all surrounding streets off London Road. Regular projects in South Norwood and Broad Green too.
Excavation through concrete pour typically completes within 5-7 working days. Curing time adds another week before brickwork can commence, weather permitting.
Structural groundwork carries our decade-long guarantee, backed by professional indemnity insurance. All concrete meets British Standards, with batch certificates provided for building control sign-off.
Assessment usually reveals original footings are shallower than current regulations require. Underpinning or independent foundations typically provide the solution, preventing differential settlement between old and new structures.
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