A pair of unadorned, utilitarian zinc boxes sit on top of two late 20th century homes in Hackney, inspired by local light industry. Designed as low-cost and low-impact house extensions, the sloped structures follow the exact roofline of the existing buildings and belie the more intricate interior spaces within. The project has been designed inside out to provide the owners of each property with a new bedroom, shower & WC to relieve pressure on the houses below, which fit within a pragmatic envelope defined by planning constraints.

The emphasis for this project is a series of highly detailed, minimalist rooms which feature robust materials chosen for their longevity. The new bedroom is lined on all vertical and floor surfaces with Douglas fir plywood stained with a white lye oil, while the shower room is made up of terrazzo sheets with a bespoke fabricated terrazzo vanity unit.

The rooftop enclosure is constructed of a timber frame with plywood stressed skin structure minimising its build-up and weight, whilst joists from the original roof have been reused. Clad in standing seam zinc, the extension is set back from the front of the main house rendering it virtually invisible from ground level. The only visible element is clad in mirrored stainless steel to reflect the sky when viewed from neighbouring windows and ground level.

This straightforward approach to external design allowed for more expression with internal materials and finishes within the budget.

Material Used:

1. Douglass Fir Panelling With Woca Stain

2. VM Zinc Standing Seam Cladding In Quartz Finish

3. Velfac Energy Tripple Glazed Window

4. Velux Rooflights

5. Dornbrachet Meta 2 Sanitaryware

6. Toto Washlet WC

7. Large Format 20mm Terrazzo Sheets To Shower Room

8. Underfloor Heating: Nuheat Lopro 10