02/06/2026
Planning a loft conversion? Sort these 6 things before you spend a penny
Most loft conversions go wrong before the first nail goes in. People fall for a Pinterest layout, then find out halfway through that the head height won’t allow it, or the staircase eats half the new bedroom. Here’s what to check first.
Head height. Measure from the floor joist to the ridge. Below 2.2m and your options change. You’re either looking at a different conversion type or raising the roof.
Roof type. Trussed, cut, or hip? It decides what conversion is actually possible. A standard Velux loft suits some roofs. A dormer or hip-to-gable suits others. The roof tells you, not the other way round.
Staircase position. Plan this first, not last. The stairs decide where you lose space on the floor below and how usable the new room is at the top. Bolt it on at the end and you’ll regret it.
Natural light. Decide early. Velux windows are cheapest and quickest. Dormers give you more headroom and floor space. Gable end windows add real character. Each one changes the build, the cost, and the planning route.
Insulation. It matters, and so does where you put it. Insulate at the rafters and you keep the loft inside the warm envelope of the house. Get this wrong and you’ll have a room that’s freezing in January and unusable in July.
Use case. Pick this before the layout. A guest bedroom, a master suite with ensuite, a home office, a kids’ room. They all need different things from the same square footage.
Get these six right and the rest of the build runs smoothly.
All of this gets covered in our survey.
DM “LOFT” to book yours, or visit designedtobuild.co.uk
