Lofts in Burbage divide as sharply as everything else here, and in the village core the answer is often disappointing before it is anything else.
The older cottages were not built with generous roofs, and a steep looking roof can still leave you short of two metres along the walking line once the floor build up and insulation are in. We measure at the quotation rather than after, because there is no point designing a conversion that will not have standing room in it.
Where the height is there, the constraint becomes the frontage. A dormer on the roof slope facing the street is not permitted development anywhere, and on a continuous terrace inside a conservation area, where the unbroken run of roofs is part of the character being protected, it is a difficult application. Rear dormers and rooflights are a much easier conversation and are usually where the space wants to go anyway.
On the estate housing around the village the roofs are trussed, which means the structure has to be reworked rather than strengthened. That is routine work for us, and it is not the same job or the same price as a cut roof.
Escape, fire separation and stair position are all Building Regulations matters, and all easier to solve on paper than after the joists are down. Our loft conversion page goes through the structural options.