Interior office space with a black leather chair, wooden bookshelf, and a bust sculpture, viewed through glass with a bright outdoor scene, architecture by Gresford Architects

View through greenery revealing a modern staircase and building interior, architecture by Gresford Architects.

Modern multi-level residential building with outdoor terraces and wooden fencing, lush greenery, architecture by Gresford Architects.

Bright modern home office with white walls, wooden flooring, a black lounge chair, a tall bookshelf, and a skylight window; architecture by Gresford Architects.

View of a rooftop terrace with potted plants, outdoor furniture, and wooden railings, above a garden area, under a partly cloudy sky; architecture by Gresford Architects.

Interior staircase with natural light, wooden handrail, white walls, and ceiling, architecture by Gresford Architects

Interior view of a bright room with large windows and a balcony, featuring a white table, green and black chairs, and artwork on white walls; architecture by Gresford Architects.

Modern wooden slatted building with a tree and blue sky, architecture by Gresford Architects.

Open courtyard with colourful doors, wooden fencing, and outdoor stairs, under a bright blue sky, architecture by Gresford Architects.

Four roof extensions to adjoining modern mews houses in North London.

Gillett Place is a development of 9 flats and 4 mews houses completed in 2007 by Hawkins Brown. The mews houses — the subject of the work — had three external spaces — a first floor balcony and two second floor roof terraces. The two roof terraces were divided laterally by a structure which houses the stair to the roof.

The rear terraces, which are to the north of the houses, were underused by all residents who decided to submit a joint planning application to construct a room on each of the rear roof terraces.

Each of the new rooms has new glazed wall with glazed doors to the south elevation which allows light to flood into the centre of the house plan, where it didn't before.

A mansard roof to the north elevation stops any loss of light to the houses behind and provides space for a row of extra storage units within the eaves. Each room will be used in a different manner by the residents, and the design of each room is individual including, to an extent, the facade treatment.