Those generous Wandsworth gardens deserve more than just lawn and patio. A thoughtfully designed annex transforms unused space into something extraordinary – whether that's a peaceful home office overlooking mature trees or a teenager's sanctuary at the garden's end.
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Victorian terraces throughout SW18 often surprise with their plot depths, stretching back 100 feet or more. Yet most of that precious space sits dormant, especially during winter months. Modern garden annexes change this equation entirely. Built to current building standards with full insulation and proper foundations, these structures become natural extensions of your home.
Planning permission rarely poses problems for annexes under 2.5 metres height. Wandsworth Council's permitted development rules favour homeowners looking to maximise their outdoor space. Construction typically involves minimal disruption – prefabricated panels arrive ready for assembly, while groundworks focus on specific foundation points rather than extensive excavation. Double-glazed windows, underfloor heating options, and weatherproof cladding ensure year-round comfort.
Twenty years of building in SW18 means understanding which designs complement Edwardian brickwork versus 1930s semis. Local knowledge matters when positioning structures to catch afternoon sun whilst maintaining neighbours' privacy.
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Basic 3x3 metre structures start around £15,000, whilst fully-fitted 5x4 metre annexes with bathrooms typically range £35,000-45,000. Premium specifications with bi-fold doors and cedar cladding push budgets toward £60,000.
Absolutely – from the riverside properties near Wandsworth Park to the hillside gardens of West Hill, we've constructed annexes across every corner of SW18.
Groundworks begin within 2-3 weeks of approval, with the main structure erected over 5-7 days. Complete fit-out including electrics and plumbing adds another fortnight.
Every structure carries decade-long protection covering timber frame integrity, roofing systems, and weatherproofing. Separate warranties apply to electrical installations and any plumbing work.
Connecting power involves armoured cable runs from your consumer unit, whilst water supplies tap into existing outdoor pipes where possible. Some properties benefit from independent systems, particularly for heating.
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