Rear and side dormers to Holland Park’s period houses — adding headroom and a usable room while keeping the front roofline intact and RBKC on side.
Speak to the studio directly: 020 8054 8756
A dormer is usually the most efficient way to add real headroom to a Holland Park loft: it projects from the roof slope to create full standing height and a square, usable room. In W11 the front roof slope faces the street and the conservation area, so front dormers are normally resisted — the volume is won at the rear or side instead.
Most of Holland Park sits within RBKC’s conservation areas, so even a rear dormer needs planning permission and a design that stays subordinate to the roof. We size and position the dormer so it reads correctly, sits below the ridge, and does not dominate the original roof form.
We assess your specific roof first — pitch, ridge height and party walls — then design a dormer that wins consent and works structurally, with the staircase, fire strategy and Building Control handled in one contract.
Where the dormer can go — and how big — is set by RBKC roofline policy.
On the street elevation a dormer almost always harms the conservation roofline, so the room is gained at the rear or side.
RBKC expects a dormer set below the ridge and in from the edges, framed and clad to sit quietly on the roof.
A dormer in a conservation area needs a formal application and a roof study showing it is not prominent from the street.
A new floor needs steel support, a compliant staircase and a fire strategy — engineered and signed off in-house.
From a roof feasibility study to a finished, weather-tight room — all under one team.
Measuring pitch, ridge and head height to confirm a dormer delivers usable space.
Drawings and a heritage-led case for a subordinate rear or side dormer.
Steel and floor structure to carry the new room, with Building Control.
Framing, roofing, lead/zinc weathering and insulation to current standards.
A compliant stair woven into the floor below without losing a room.
Escape, protected route and Building Regulations sign-off.
Windows or rooflights set to suit the elevation and bring in light.
Bedroom, study or bathroom fit-out, snagging and a clean handover.
We design and build dormer conversions where the roof and conservation area allow, across Holland Park’s 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.
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.
Site visit · approvals read · outline budget band (GBP) · programme indication. No obligation.
Send Project DetailsThe same NW3 design-build team covers the neighbouring areas: