Those sprawling CR8 gardens deserve more than just lawn and borders. Whether you're eyeing that unused corner behind your Victorian semi or the space beyond your patio, a garden annexe transforms dead space into living potential.
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Purley's mix of period properties and post-war developments often feature surprisingly generous gardens. Many residents discover they're sitting on untapped square footage, particularly those lucky enough to own the larger plots common around Riddlesdown and Higher Drive. Creating a separate living space doesn't mean sacrificing your entire garden - smart design works with your existing layout, preserving those mature trees and established planting schemes that make Purley gardens special.
Modern garden buildings go far beyond basic summer houses. Insulated walls, double glazing, and underfloor heating create year-round comfort. Planning regulations typically allow structures up to 2.5m high within 2m of boundaries - perfect for those narrow side returns common in Kenley's terraced streets. Full electrical installation, plumbing connections, and even bathroom facilities transform these spaces into genuine extensions of your home, whether that's a teenage retreat, home office, or granny flat.
Local knowledge matters when navigating Croydon Council's planning requirements and understanding how annexes fit different plot types across Sanderstead and Coulsdon. Years spent working with Purley's varied topography - from level lawns to sloping gardens backing onto the Downs - means practical solutions that actually work.




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Basic insulated structures start around £15,000, while fully fitted annexes with bathroom facilities typically range £25,000-£45,000. Bespoke designs for larger Purley plots or complex installations can exceed £60,000.
Absolutely - from the leafy roads near Purley Oaks station to properties backing onto Riddlesdown Common. Regular projects across all CR8 postcodes, plus neighbouring Kenley, Coulsdon and Sanderstead.
Standard builds complete in 4-8 weeks once groundwork begins. Larger specifications or those requiring planning permission may extend to 12-16 weeks total.
Every annexe includes decade-long structural coverage, protecting your investment against defects. Separate warranties cover electrical systems, windows, and any fitted bathrooms or kitchens.
Most properties allow connection to mains electricity and water, though Victorian homes sometimes need supply upgrades. Site surveys identify the most practical routing for services, avoiding disruption to established gardens.
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