Concrete-clad rear extension and garden glazing — Datum House

New Highgate Extension

Datum House

If less is more, maybe nothing is everything.

Rem Koolhaus

TEXT

When our clients approached us, they had a clear brief of what they wanted to achieve for their home. They needed an additional bedroom for their growing family, but they also wanted to transform the lower ground floor of their maisonette —a space that was dark and disconnected from the outside. The challenge was to achieve all of this while working within the constraints of a historic Victorian building.

The concept for our scheme centred around three key elements that we tested. 1- an internal reconfiguration of the existing lower ground floor, that allowed us to create a bedroom at the front of the property and re-orientate the living spaces to face onto the secluded garden, 2 – a full width skylight that spanned the entire width of the property and 3 – a monolithic sculptural wall that served both as a threshold between inside and out but also as a multifunctional piece of furniture that concealed doors.

For a while now we have been interested in experimenting with what a façade is and how a simple wall can become a dynamic building element when it serves more than one purpose.

By separating this wall from the main structure with a full-width, wall-to-wall skylight, we crafted an optical illusion that makes one feel as though you’re looking at a piece of sculpture whilst looking to the outside. The design not only addressed the clients’ desire for more light but also created a sense of openness that’s rarely found in lower ground floor spaces.

Externally the rear facade, with its monolithic stack bonded brickwork, appears as a standalone architectural element that adds an interesting quality to the design. Its deep reveals serving a practical purpose of concealing sliding pocket doors and a concealed curtain track.

Internally we continued this theme of connection to the outside with a simple material palette of concrete, clay, and timber. These materials not only define each space clearly but also maintain a cohesive aesthetic throughout the home. A datum line, expressed in both concrete and timber, ties the interior spaces together and extends out into the sunken courtyard, highlighting the depth one stands below the raised garden level and reinforcing the sense of continuity that was central to the clients’ brief.

CREDITS:

ARCHITECT: DHaus
Project Architects: David Ben-Grunberg, Daniel Woolfson & Nikki Smith

CONTRACTOR:  Clonmoran Construction

GLAZING: Maxlight

CONCRETE FLOORING: Lazenby

JOINERY: Materialise Creative Design

PHOTOGRAPHY:  James Retief

Concrete interior wall framing garden-facing doors — Datum House
Kitchen with timber cabinetry beneath a rooflight — Datum House
Timber kitchen island and panelled cupboard wall — Datum House
Timber cabinetry around a pale kitchen worktop — Datum House
Garden doors opening beneath a concrete wall — Datum House
Bathroom basin with timber drawers and a round mirror — Datum House
Rooflit corridor with timber wall panelling — Datum House
Small upholstered seat set into timber wall panelling — Datum House
Interior view along timber joinery towards garden doors — Datum House
Rear extension illuminated through garden-facing glazing — Datum House
Lit rear extension beneath the original brick house — Datum House
Proposed floor plan drawing — Datum House
Technical façade detail drawings — Datum House
Rear elevation drawing — Datum House
Rooflight and wall section details — Datum House
Geometric DHaus logo within a wireframe cube — DHaus Concept
DHaus is an experimental Architecture and Design practice. We strive to make complicated things simple.