Kenilworth has some of the better lofts in the district, because the Victorian and Edwardian villas were built with roofs that had proper pitch and proper height.
On those houses a conversion is often the best value space available, since the roof and the walls already exist and the structure is generous enough to work with. Head height still needs measuring rather than assuming, because floor build up and insulation take more out of a roof than people expect, but the odds here are better than on most stock.
The conservation area is the constraint. Around Avenue Road anything that alters the roofline the street can see will be looked at closely, and a dormer on the principal elevation is not permitted development anywhere in any case. Rear dormers and rooflights are a far easier conversation, and on these plots the rear is usually where you want the space anyway.
The twentieth century housing across the rest of the town is trussed, which means the structure has to be reworked rather than strengthened. Normal work, and not the same job as a cut roof.
The permitted development volume allowance is forty cubic metres on a terrace and fifty on a semi or detached house. Escape, fire separation and stair position are all Building Regulations matters. Our loft conversion page goes through the structural options.