L-Shaped Loft Conversions in Holland Park, W11
L-shaped loft conversions to Holland Park houses with a rear outrigger — combining a main dormer with a return over the back addition for a larger room.
Speak to the studio directly: 020 7101 3168
Two roof slopes, one larger room
An L-shaped conversion takes advantage of a rear outrigger — the back addition or ‘closet wing’ found on many period houses — by adding a dormer over the main roof and a return over the outrigger. The two link to form an L-shaped room with far more floor area than a single dormer.
It only works where the house has that rear back addition, which is common on Victorian and Edwardian houses in and around Holland Park. Because both elements are at the rear, an L-shaped scheme is usually less prominent from the street, which helps in the conservation area — but it still needs planning permission.
We survey both roofs, design the two dormers to read as one considered addition, and engineer the structure, staircase and fire strategy together, in a single design-and-build contract.
What shapes a Holland Park L-shaped loft conversion
The L-shape only exists where there is a rear back addition to build over.
Needs a rear outrigger
The ‘L’ comes from a return over the back addition — no outrigger, no L-shape.
Mostly at the rear
Both dormers sit at the rear, so the scheme is usually less prominent from the street.
Planning still required
Even at the rear, conservation-area roof changes need a formal application and a careful design.
Two roofs, one structure
The main dormer and the return must be engineered and weathered together as a single room.
What a Holland Park L-shaped loft conversion includes
From surveying both roofs to a finished L-shaped room — under one team.
Roof survey
Measuring the main roof and the outrigger to confirm an L-shaped room works.
Planning & heritage
Drawings for two rear dormers designed to read as one considered addition.
Structural design
Steel and floor structure across both roofs, with Building Control.
Dormer & return build
Framing, roofing and weathering of the main dormer and the return.
Staircase & access
A compliant stair positioned to open onto the larger room.
Fire & compliance
Escape, fire separation and Building Regulations sign-off.
Services & insulation
Heating, electrics and insulation to current standards.
Fit-out & handover
Bedroom-with-bathroom or suite fit-out, snagging and handover.
Streets & estates across W11
We build L-shaped conversions on Holland Park’s period houses that retain a rear back addition, across the W11 terraces and villas.
Holland Park sits within the Royal Borough of Kensington & Chelsea — see our Holland Park area page and South West London refurbishment overview.
Questions clients ask before they start
What makes a loft conversion L-shaped?
Does my house have a rear outrigger?
Does it need planning permission?
Will I need a party wall agreement?
How much does an L-shaped loft cost?
More in Holland Park, W11
Holland Park refurbishment
Loft conversions in Holland Park
Start your Holland Park L-shaped loft conversion
Book a no-obligation consultation at 2 Eaton Gate in SW1, at our Hampstead studio, or at your property. We will give you an honest read on approvals, programme and budget band — in pounds sterling — before you commit.
Book a feasibility visit
Site visit · approvals read · outline budget band (GBP) · programme indication. No obligation.
Send Project DetailsL-Shaped Loft Conversion Near Holland Park
The same NW3 design-build team covers the neighbouring areas:
Discuss your project
Tell us what you are planning in Holland Park
Share the property location, the work you have in mind and any drawings or permissions you already have.
£5M public liability, £10M employers' liability and contractors' all risks cover.
Design support: Hampstead Architecture & Planning. Surveying support: Hampstead Chartered Surveyors & Building Consultancy.
Completed renovation project examples
