The first question on a Bedworth loft is head height, and on the colliery terraces the answer is often disappointing. Those houses were built to a budget in 1893 and the roofs were not generous. 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, so we measure before you get attached to the idea.
Where the height is there, a conversion is usually the best value space in the house, because the roof and walls already exist. The permitted development volume allowance is forty cubic metres on a terrace and fifty on a semi or detached house, which sounds ample until a dormer is drawn.
A dormer facing the road is not permitted development anywhere. In Bermuda, where an Article 4 direction applies and the whole point of the designation is that the village has barely changed since it was built, anything visible from the street will be looked at very hard indeed. Rear dormers and rooflights are a far easier conversation.
The modern estate housing is trussed, which means the structure has to be reworked rather than strengthened. That is normal work, but a trussed roof and a cut roof are not the same job and should not carry the same price.
Escape, fire separation and stair position are Building Regulations matters and all easier on paper than after the joists are down. Our loft conversion page goes through the options.