Those steep Purley gardens need proper foundations before any shed goes up. Getting the base right means your garden building stays level for decades, even on chalk soil that shifts with the seasons.
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Victorian properties throughout CR8 often feature sloping rear gardens carved into the North Downs chalk. Installing shed bases here requires understanding how water drains through these hillside plots. Years of working from Foxley Lane to Higher Drive have taught us which foundation types suit each terrain.
Concrete bases work brilliantly on level sections, while timber frames with adjustable legs handle gradients better. Preparation involves excavating down to stable ground, adding MOT Type 1 hardcore, then either pouring concrete or constructing pressure-treated bearer frames. Proper membrane installation prevents moisture rising through chalk's natural fissures.
Local knowledge matters when chalk meets clay near Sanderstead border. Every Kenley and Coulsdon project has refined our approach to Purley's unique geology.
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Standard 8x6ft concrete bases start around £450-600, while larger 12x10ft installations reach £900-1200. Timber-framed alternatives run slightly less. Steep gardens requiring retaining edges add 20-30% due to extra groundwork.
Absolutely - from Woodcote Valley through to Riddlesdown, covering all of CR8 including the hillier sections near Kenley aerodrome where drainage becomes crucial.
Timber bases take 1-2 days including ground prep. Concrete needs 48-72 hours curing time before shed installation, meaning a full week from start to shed-ready.
Each base carries decade-long protection against settlement or structural failure. This covers the foundation integrity, not surface wear, and includes free inspection if concerns arise within ten years.
Certainly - we regularly prepare foundations for 20x15ft garden offices and substantial summerhouses. These need deeper footings and often incorporate service ducts for electrics and water, all calculated according to building weight.
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