Velux (rooflight) conversion
The simplest conversion — no roof alteration beyond cutting in 3–4 Velux roof windows. Floor strengthened, partitions added, insulation, electrics, staircase, plaster, decorate. Suitable where ridge height is generous and you don't need standing headroom across the full footprint. Lowest cost option; typically 6–8 weeks. Usually permitted development (no planning needed).

