House Extensions and Alterations - Wigan Council

WIGANLOCALDEVELOPMENTFRAMEWORKHouse Extensions SPDWigan CouncilLDF2.10 Since a two storey extension islikely to have a greater impact onresidential amenity, the ‘45 degree rule’will be applied. The rule is applied bydrawing a line at 45 degrees from themid-point of the nearest window to aground floor habitable room on anyadjoining dwelling. If the line cuts throughany part of the proposed development,then the extension is too large and shouldbe reduced in size in order to prevent anynegative impact on residential amenity.2.11 Only in very exceptionalcircumstances will it be acceptable fordevelopment to extend beyond thepermitted '45 degree rule.' In suchinstances the council will expect theapplicant to satisfactorily demonstrate thatthere will be no adverse impact onneighbouring residential amenity.A two storey extension should adhere to the '45 degree rule'6