Every loft type across every London roof line — dormer, mansard, hip-to-gable, L-shape, Velux and rooflight. LDC or full planning route, building regs, structural calcs and party wall, fixed price.
We confirm before quoting whether your loft has the head height and structural capacity for a conversion — and which type makes most sense.
Most London lofts qualify for Lawful Development Certificate (permitted development). We check Article 4 and conservation constraints first.
Option studies including massing, internal layout and roof geometry — chosen to maximise usable space within PD or policy limits.
Staircase Part K compliance, Part B fire escape, Part L insulation, Part E acoustic separation from the flat below.
Ridge beam, purlins, steelwork, floor joist upgrade, dormer framing — chartered engineer sign-off.
Almost every London loft triggers Party Wall notices. We draft notices and coordinate with surveyors.
Every case is different. Call 020 7946 0000 for a five-minute chat.
Start a free quote →Most London loft conversions fall under Permitted Development if under 40m³ (terrace) or 50m³ (semi/detached), with matching materials and set back 20cm from eaves. Flats, conservation areas, Article 4 zones and listed buildings need full planning. We confirm at the survey.
A dormer is a box projection from an existing sloped roof. A mansard rebuilds the entire rear (or both) roof slopes near-vertical, creating a full-height floor. Mansards offer most space but need planning (not PD).
Usually yes on the rear, but front and side dormers are rarely approved. Conservation area rear dormers in Camden, Westminster, Islington, Hackney etc. need a sensitive design and Heritage Statement — included in our bespoke tier.
2.3m from existing ceiling joist to existing ridge is the practical minimum for a standard conversion. Below 2.2m usually requires lowering the ceiling below or mansard design.
Yes — most London lofts trigger Party Wall notices. Rear dormers can also prompt right-to-light considerations in dense terraced contexts. We handle both.
Fixed fee from £1,225. Free quote in 60 seconds. Covers every London borough.
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