Those generous Sidcup gardens deserve more than just lawn and borders. A thoughtfully designed annexe transforms unused space into something extraordinary – whether that's a home office overlooking mature trees or a guest suite for visiting family.
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Sidcup's characteristic 1930s properties often feature surprisingly deep gardens that homeowners rarely maximise. Building regulations here allow for substantial outbuildings without planning permission, provided they meet specific criteria. Many residents discover their 40-metre plot can comfortably accommodate a 30-square-metre annexe whilst maintaining ample outdoor space. The key lies in understanding both local regulations and the unique topography of each garden.
Modern annexe construction employs SIPs panels and triple-glazed windows, achieving exceptional thermal efficiency year-round. Ground screws eliminate concrete foundations on most Sidcup soil types, preserving existing tree roots and drainage patterns. Electrical connections typically run from your main consumer unit through armoured cable beneath pathways. Internal layouts adapt completely to your requirements – partition walls, bathroom placement, and kitchen facilities all customise to suit intended use.
Twenty years of constructing outbuildings across Southeast London means understanding exactly which materials withstand our climate. Local planning officers know our work meets every regulation first time, avoiding costly delays that plague inexperienced builders.
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Basic 20m² structures start around £25,000, whilst fully-equipped 40m² annexes with bathrooms and kitchens typically range £45,000-£65,000. Bespoke specifications, premium finishes, or complex groundwork naturally increase costs.
Absolutely – from the leafy roads near Scadbury Park in DA14 through to properties backing onto Foots Cray Meadows in DA15. Regular projects also extend into neighbouring Chislehurst, Eltham and Bexley.
Most garden annexes complete within 6-8 weeks from breaking ground. Larger specifications or those requiring significant groundwork might extend to 10-12 weeks, particularly during winter months.
Every structure carries comprehensive 10-year protection covering materials and workmanship. This includes weatherproofing, structural integrity, and all installed systems – essentially everything except normal wear or accidental damage.
Connecting to existing drainage depends entirely on your property's layout and local sewer positions. Where main connections prove impractical, modern treatment plants offer excellent alternatives that satisfy building control requirements.
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