SM1 · Sutton & Benhilton
SM1 covers Sutton town centre and Benhilton, the borough's busiest district. Much of the Victorian and interwar stock keeps permitted development rights for rear extensions and lofts; the borough-wide HMO Article 4 (in force since February 2025) means a house-to-HMO conversion needs planning permission.
Location data: postcodes.io · Constraints: planning.data.gov.uk (borough-level) · Open Government Licence
Constraint context · Sutton
Real · planning.data.gov.ukSutton has 15 designated conservation areas and 0 Article 4 areas. A district is too coarse to say which apply to your house — postcode districts span many streets and designations are drawn street by street. Enter a full postcode below for the point-level check, or read the full borough picture on the Sutton planning guide.
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Planning Permission Checker provides planning and cost intelligence for early feasibility only. It is not legal, planning, valuation, architectural, structural, or surveying advice. All estimates are indicative and must be verified by qualified professionals before purchase, design, planning submission, or construction.
Cost estimates are indicative only — not a quotation. Final price depends on survey, specification, structure, access, party wall matters, VAT, professional fees, and contractor availability.
Planning outcomes are not guaranteed. Local planning authorities make final decisions.