January 3, 20242 yr We have a 1960's semi-detached house - same design as many up and down the country. Both us and the neighbours have a rear extension, but in a different orientation - leaving a bit of a void space between the 2 extensions - approx 4mx 4m - shown in red on the attached diagram. We would like to extend our kitchen into this space - to the same depth as the neighbours extension and ideally joining on to it (assuming they were in agreement). Is this possible? From a planning POV? If we didn't have the extensions then the 2 houses would be joined anyway. From a practical point of view? Is it posible to join 2 flat roofs together?
January 3, 20242 yr Author Fairly well and I believe they would be agreeable based on conversations we have had in the past so long as there was no down-side for them.
January 3, 20242 yr That’s a good start. 13 minutes ago, extend_my_house said: Is it posible to join 2 flat roofs together? Yes, what is the roofs comprised of? (Felt, GRP, membrane)
January 3, 20242 yr Author Ours is green mineral felt and theirs seems to be normal black felt. The is a height difference of about 800mm between the 2 extensions - their is higher - so I would like the extension into the "void" to be the same height as theirs and then step-down to ours.
January 4, 20242 yr I think if it were me I might be getting ball-park prices from local GRP/EPDM flat roofing contractors with a view to offering the neighbour a 'sweetener' which could lie somewhere between a percentage of the estimated cost of re-roofing their exg extension on the exg deck and the full cost of re-building their roof to become a Warm Roof (like yours might become, clearances permitting - I'm thinking windows, flues, whatever).
January 15, 20242 yr In England or Wales you need a 'Party Wall Agreement' between you and your neighbour but not sure if anything similar in Scotland? Party walls and building work:- https://www.gov.uk/party-walls-building-works
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