12 February 2015 · Director of Planning and Building Control
Derby House, Castle Street, Castletown, Isle Of Man, IM9 1la
Derby House (Former Post Office) is a two-storey traditional stone building with timber sliding sashes and Georgian glazing bars, located in Castletown Conservation Area next to the Police Station and opposite Castle Rushen.
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The officer determined that replacing original timber windows with uPVC would harm the character and appearance of the registered building and Castletown Conservation Area, as the rear elevation remai…
Environment Policy 35
Requires development in conservation areas to preserve or enhance character and protect special features. The officer found the uPVC windows would harm the area's character by removing original timber features, failing to preserve or enhance despite rear location.
Planning Circular 1/98, The Alteration and Replacement of Windows
Requires window replacements to exactly match originals in materials, opening, and design if repair impracticable; strictly applied absent exceptional justification. uPVC failed material test despite matching other aspects, with no exceptional circumstances provided.
Environment Policy 32
Cited in refusal reason alongside ENV35 for failing to preserve/enhance registered building and conservation area character; specific requirements not detailed but applied to uPVC impact.
