Sutton is overwhelmingly suburban: 1930s semis across Sutton, Wallington, Carshalton and Cheam, Edwardian terraces around Sutton town centre, and post-war ex-LA estates in Roundshaw and parts of St Helier (the St Helier Estate spans the Merton-Sutton boundary).
Sutton's 1930s suburban semis produce the standard interwar condensation pattern — cold external walls, original or partially-replaced single-glazing, chimney-breast mould and bedroom condensation. The St Helier Estate's interwar cottage-style social housing shows similar patterns plus historic damp where rendered finishes have failed. Roundshaw's 1960s housing shows system-built condensation patterns.
London Borough of Sutton, Sutton Housing Partnership, Clarion and Optivo (now SNG) operate substantial local stock. Sutton has a comparatively quieter private-rental market than inner London, with most demand for mould remediation coming from owner-occupiers responding to recurring condensation in older semis.
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