Black-painted larch planks clad extension to a house in London

Larch planks finished with matt black barn paint were used to clad this extension of a Victorian terrace in London, designed by architect Harry Thomson.

Fittingly named A House for Four, the project provides additional spaces for a couple and their two children.

House for Four London house extension by Harry Thomson of Studioshaw

The existing dining space has been extended out into the garden, and a stepped dormer set into the roof has added an extra bedroom.

Alongside these new areas, the interiors of the home have been reworked and opened-up with materials such as Douglas fir, fair-faced blocks and exposed plaster.

House for Four London house extension by Harry Thomson of Studioshaw

"The project uses standard elements in bespoke ways throughout," said Thomson.

"The plaster on the walls and ceilings in the kitchen is left exposed, the dusty pink colour complementing the Douglas fir timber frame and creating a visual warmth."

House for Four London house extension by Harry Thomson of Studioshaw

A previously uneven floor in the kitchen and dining area has been levelled out.

This creates a continuity across a space that protrudes  into the garden and opens out onto it with a large glass door.

House for Four London house extension by Harry Thomson of Studioshaw

A wooden bench, which provides seating for the dining table, extends into the new area.

It wraps around to form a large window box, which provides views out to the garden through a window.

House for Four London house extension by Harry Thomson of Studioshaw

The extension's timber frame sets it apart from the rest of the kitchen, creating a slightly higher space illuminated from above by skylights set between the beams.

"This is a space to sit in and inhabit with cushions or plants. Generous storage was created beneath the bench seat and under the stairs, allowing shoes and school bags to be tucked away," explained Thomson.

House for Four London house extension by Harry Thomson of Studioshaw

The bespoke joinery is by Sam Haddow and Emiliano Malferrari.

A House for Four's kitchen is now "somewhere to talk, to do homework, to have a party," said Thomson.

House for Four London house extension by Harry Thomson of Studioshaw

Douglas fir lines the entirety of the new attic space, as well as the small staircase that connects it to the existing house.

The new bedroom sits below the sloping roofline, where two skylights have been created as well as built-in storage behind wooden panels.

House for Four London house extension by Harry Thomson of Studioshaw

This concealed storage has also been employed on the ground floor, where the area underneath the staircase is boxed-in to create a series of cabinets.

Harry Thomson is a director at London-based practice Studioshaw, which recently completed a co-working space with a "cocktail bar feel" in west London.

Photography is by Lenny Codd.


Project credits:

Client: Maisie Broadhead and Jack Cole
Architect: Harry Thomson
Structural engineer: Hardman Structural Engineers Ltd
Joinery: Sam Haddow and Emiliano Malferrari
Main contractor: Purple Brown Building Services
Landscape: Borchard's Landscapes

More images and plans

Existing ground floor plan of House for Four London house extension by Harry Thomson of Studioshaw
Existing ground floor plan
Existing first floor plan of House for Four London house extension by Harry Thomson of Studioshaw
Existing first floor plan
Existing second floor plan of House for Four London house extension by Harry Thomson of Studioshaw
Existing second floor plan
Existing roof plan of House for Four London house extension by Harry Thomson of Studioshaw
Existing roof plan
Existing elevation of House for Four London house extension by Harry Thomson of Studioshaw
Existing elevation A
Existing elevation of House for Four London house extension by Harry Thomson of Studioshaw
Existing elevation B
Proposed ground floor plan of House for Four London house extension by Harry Thomson of Studioshaw
Proposed ground floor plan
Proposed first floor plan of House for Four London house extension by Harry Thomson of Studioshaw
Proposed first floor plan
Proposed second floor plan of House for Four London house extension by Harry Thomson of Studioshaw
Proposed second floor plan
Proposed roof plan of House for Four London house extension by Harry Thomson of Studioshaw
Proposed roof plan
Proposed section B of House for Four London house extension by Harry Thomson of Studioshaw
Proposed section B
Proposed section A of House for Four London house extension by Harry Thomson of Studioshaw
Proposed section A
Proposed elevation of House for Four London house extension by Harry Thomson of Studioshaw
Proposed elevation A
Proposed elevation B of House for Four London house extension by Harry Thomson of Studioshaw
Proposed elevation B
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw
House for Four London house extension by Harry Thomson of Studioshaw