Loft Conversions in Ruislip & NW London

Dormer, Velux and Hip-to-Gable Conversions

The three main loft conversion types each suit a different property shape. Velux conversions stay within the existing roofline and add Velux roof windows for natural light. Dormer conversions push out a flat-roofed box from the rear roof slope to gain proper standing height and floor area. Hip-to-gable conversions replace a hipped roof end with a vertical gable wall, then often add a rear dormer to the converted space.

Most NW London 1930s semis can take a dormer conversion under permitted development. Hipped-roof properties usually need the hip-to-gable treatment to gain enough usable space. End-of-terrace and detached properties often have more flexibility. The first conversation is usually about which type your roof structure and planning context can take, before any drawings get commissioned.

Our Loft Conversion Process

Loft conversions start with a survey of the existing roof structure and floor joists. New floor joists are typically required to carry the loads of the converted space; existing ceiling joists were sized for ceiling-only loads, not for furniture, beds and people walking on them. The staircase access, often the single biggest design constraint, is worked out at this stage.

Build sequence runs through structural work (new joists, dormer construction, roof opening, steels where required), then roof finish, windows, first-fix services, insulation to Building Regs standards, plasterboard, second-fix services and decorating. Bathroom and ensuite fit-out, where part of the conversion, slots into the standard sequence with plumbing rough-in during first-fix.

How Long Does a Loft Conversion Take?

A standard dormer conversion typically runs eight to twelve weeks from start on site to handover. Velux-only conversions, which don't require the structural work of a dormer build, can be quicker. Hip-to-gable conversions add time because of the additional gable wall construction. Ensuite or full bathroom inclusion typically adds a week or two to the second-fix and finishing stages.

As with extensions, planning approval timelines sit outside the build window. Permitted development conversions can start within weeks of design sign-off. Full planning applications add eight to twelve weeks. Hip-to-gable typically requires planning permission because of the change to the external roofline. We'll be realistic on timeline at the quote stage.

Loft Conversions Across NW London

Loft conversions across Ruislip, Pinner, Northwood, Uxbridge, Harrow, Watford, Rickmansworth, Amersham, Ealing and Beaconsfield. The bulk of our loft work is in the 1930s semi-detached stock common across the NW London arc.