House Extensions and Alterations - Wigan Council

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LDFWIGANLOCALDEVELOPMENTFRAMEWORKHouse Extensions SPDWigan CouncilSide Extensions and Alterations2.15 Side extensions not only impacton the setting of a dwelling, but can alsohave an impact on the character andappearance of a street scene. Thecouncil will seek to prevent the loss ofspaces between buildings, where thespaces are important in defining thecharacter of the street scene, and wheretheir loss would give the impression of acontinuous built form.2.16 This is particularly true when twoneighbours decide to extend at two storeylevel over their driveways up to thecommon boundary. The result is that thetwo dwellings lose their ‘semi-detached’or ‘detached’ appearance and appear asterrace dwellings. This can adverselyaffect the appearance of the street sceneand the character of the area. To avoidthis ‘terrace effect,’ a side extensionshould be stepped in from the boundaryby 800 millimetres and at first floorstepped back from the front of the mainbuilding by one metre.2.17 A side extension must be welldesigned, with the use of buildingmaterials and styles that match orcomplement the original dwelling.2.18 A side extension should have alower roofline and should not consist ofany awkward roof finishings and flashes.If a side extension is to be single storeythen the proposed ground floor elementmust be set back from the front of thebuilding by a minimum distance of onebrick length (200 millimetres). This wouldequally apply to the ground floor of twostorey extensions. This will help to createa subordinate appearance and avoidproblems of joining the new with the oldbuilding materials.Side extensions should be set back and set in to avoid the 'terrace effect'9
WIGANLOCALDEVELOPMENTFRAMEWORKHouse Extensions SPDWigan CouncilLDF2.19 Where an extension exceeds twostoreys, or includes dormer windowswithin the roof slope, it will be necessaryfor a bespoke approach to be adopted,having regard to the particular design ofthe dwelling and the character of thearea. Therefore, in exceptionalcircumstances the above guidelines maybe relaxed, but the principle of avoidingthe ‘terrace effect’ still applies.2.20 The diagram below shows how theextension to a dormer bungalow might bebest designed to accord with the characterof the existing dwelling and the streetscene. However, as shown in the diagramon page 16 this kind of design would nototherwise be acceptable.2.21 A side extension should not resultin the loss of existing off-street car parkingunless adequate provision existselsewhere within the residential curtilage.This would equate to one parking spacefor dwellings with up to 3 bedrooms andtwo parking spaces for dwellings with 4or more bedrooms.2.22 The removal of a front boundarywall or hedge and the development of thefront garden into a forecourt for parkingwill be resisted where it would have anadverse impact on visual amenity or thecharacter of the street scene, or where itmay cause localised flooding. Thoughtshould be given to appropriate boundarytreatments when designing extensions.Side extensions on dormer bungalows should also avoid the 'terrace effect'10
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House Extensions and Alterations - Wigan Council

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