Service
Loft Conversions in London
New bedrooms and bathrooms within your roof — dormer, mansard, hip-to-gable or rooflight conversions, designed, approved and built by one team.
Completed loft conversion — bedroom with dormer or rooflights
The most valuable space you already own
For most London terraces and semis, the loft is the cheapest space to gain: no excavation, no lost garden, and often no full planning application. A well-executed conversion adds a principal bedroom suite or two rooms and a bathroom — and changes how the whole house works.
The craft is in the constraints: achieving head height, landing a staircase that doesn’t steal a bedroom, getting structure and fire regulations right, and making the new floor feel like it was always there rather than an obvious addition.
Loft conversions pair naturally with a full renovation or extension — one programme, one scaffold, one disruption.
What's included
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Feasibility & design
Head-height survey, staircase options and layouts before you commit.
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Structural engineering
Steels and floor structure designed, installed and signed off by building control.
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Dormer & roof construction
Dormer, mansard or hip-to-gable build, weathertight fast.
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Staircase
A staircase designed to code that preserves the floor below.
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Bathrooms & services
En-suites, heating extension and electrics for the new floor.
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Insulation & finishing
Warm-roof insulation, plastering, joinery and decoration to match the house.
Do you need planning permission for a loft conversion?
Many rear dormers fall under permitted development; mansards, front alterations, conservation areas and flats generally need a planning application. We assess your roof and your borough’s rules at the first visit, and manage whichever route applies — including party wall notices for terraced and semi-detached houses.
More detail in our guide: planning permission for home renovations.
Loft conversion FAQs
Is my loft high enough to convert?
As a rule of thumb you need about 2.2m from the existing ceiling joists to the ridge. Below that, options like lowering ceilings exist but change the economics — we measure and tell you straight at the feasibility stage.
How long does a loft conversion take?
Typically eight to twelve weeks on site for a dormer conversion, longer for mansards. Much of the early work happens from outside, so disruption inside the house is limited until the staircase goes in.
Can we stay in the house?
Usually yes — the loft is sealed off and accessed externally until late in the build.
Wondering what your roof could hold?
Book a consultation and we’ll survey the loft, talk through options and give you a realistic budget.
Book a Consultation