The first question on any Lutterworth loft is head height, and on the older houses in the middle of town the answer is often disappointing. A steep Victorian roof can look generous from the landing and still leave you short of the two metres you want along the walking line once the floor is built up and the insulation is in. We measure before we quote rather than after.
Where the height is there, a conversion is usually the best value space in the house, because the roof and the walls already exist. The permitted development volume allowance is forty cubic metres on a terrace and fifty on a semi or a detached house, which sounds like a lot until a dormer is drawn and it is not.
A dormer facing the road is the one that causes trouble. Permitted development does not cover it on the principal elevation, and inside the conservation area the council looks hard at anything that changes the roofline the street can see. Rear dormers and rooflights are a far easier conversation, and on the burgage plots the rear is where the space is anyway.
Modern estate houses north and east of the town are a different job: trussed roofs, which means the structure has to be reworked rather than simply strengthened. That is normal and we do it regularly, but anyone quoting a trussed roof at the same rate as a cut roof has not been in the loft.
Escape, fire separation and stair position are all Building Regulations matters and all of them are easier to solve on paper than after the joists are down. We arrange the Building Control inspections and see the conversion through to sign off.
Our loft conversion page goes through the structural options and the order the work happens in.