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Double Storey Rear Extension - Semi Detached - Havering

Anonymous user 28/02/2024 - 3.35 PM

I am considering a double storey extension to the rear of my semi detached house. I hope to extend across the full width of the house, up to the boundary line with my neighbour. The immediate neighbouring windows/entrances are within a hallway (upstairs) and (downstairs) a back door to a storage room and then on to the kitchen via an internal door. I have read that because these windows/doors are for non habitual rooms, the 45 degree right to light rule is not a consideration. Is that true? Do different councils interpret this in different ways? The neighbouring windows, furthest away, are connected to a bedroom and kitchen. With a 3 meter extension, it feels like it wouldn't fall foul of the 45 degree rule. I would appreciate some initial advice on this to see if this is even a possibility.

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1 Answer

Anonymous user

Hello Generally ground floor extensions can be built up to 3 metres in projection, full width, measured externally, normally one applies for these types of extensions under your permitted development rights. Two storey rear extensions, in most cases will require a householder planning application and are more difficult to get through planning than a typical two storey side extension to a semi detached property. Planners normally look for a set off the boundary with the other semi, particularly at first floor level of 2 metres, they may allow the ground floor part full width as this would normally be classed as permitted development. Yes you could submit your proposal built right up to the boundary to maximise floorspace at first floor level and detail the 45 degree strikelines from nearest habitable room windows but the planners can still reject an application on overbearing or overshadowing or bulk and good design reasons etc. So be prepared for a rejection or negotiation during the process. If you have time you can receive a rejection and appeal. Best practice is to discuss your proposed plans with your attached neighbour as if they are in objection then you will have difficulty in securing permission.

Answered2 March 2018