By Borough
Rear Extension Drawings by London Council
Borough-by-borough guidance on rear extension drawings — local conservation areas, Article 4 directions and validation quirks for each council.
Ealing
London Borough of EalingWandsworth
London Borough of WandsworthBromley
London Borough of BromleyBarnet
London Borough of BarnetRichmond
London Borough of Richmond upon ThamesLambeth
London Borough of LambethSouthwark
London Borough of SouthwarkHackney
London Borough of HackneyHaringey
London Borough of HaringeyHammersmith & Fulham
London Borough of Hammersmith & FulhamKensington & Chelsea
Royal Borough of Kensington and ChelseaGreenwich
Royal Borough of GreenwichLewisham
London Borough of LewishamCroydon
Croydon CouncilRedbridge
London Borough of RedbridgeEnfield
London Borough of EnfieldHounslow
London Borough of HounslowKingston
Royal Borough of Kingston upon ThamesMerton
London Borough of MertonSutton
London Borough of SuttonBrent
London Borough of BrentHavering
London Borough of HaveringBexley
London Borough of BexleyHillingdon
London Borough of HillingdonBarking & Dagenham
London Borough of Barking and Dagenham
London Borough of EalingWandsworth
London Borough of WandsworthBromley
London Borough of BromleyBarnet
London Borough of BarnetRichmond
London Borough of Richmond upon ThamesLambeth
London Borough of LambethSouthwark
London Borough of SouthwarkHackney
London Borough of HackneyHaringey
London Borough of HaringeyHammersmith & Fulham
London Borough of Hammersmith & FulhamKensington & Chelsea
Royal Borough of Kensington and ChelseaGreenwich
Royal Borough of GreenwichLewisham
London Borough of LewishamCroydon
Croydon CouncilRedbridge
London Borough of RedbridgeEnfield
London Borough of EnfieldHounslow
London Borough of HounslowKingston
Royal Borough of Kingston upon ThamesMerton
London Borough of MertonSutton
London Borough of SuttonBrent
London Borough of BrentHavering
London Borough of HaveringBexley
London Borough of BexleyHillingdon
London Borough of HillingdonBarking & Dagenham
London Borough of Barking and Dagenham
Rear Extension Drawings guides that apply in every borough
These are the same in all 33 councils, so they are worth reading once rather than borough by borough.