Articles / Renovations

What lies beneath

Want to know more?

Contact us

Concealed by a rooftop garden, this new summer house mimics the form of the octagonal turrets on the Victorian-era house behind


Houses built on steep sites often have little connection to the garden below. Such was the case with this Victorian-era house, but a novel solution has found a way to link the house and garden – and provide new spa facilities at the same time.

Architect Matt Coltart of Craig & Coltart Architects says the owners wanted to be able to go out to the garden without having to walk down the existing paths and ramps.

"We had to somehow bring the garden back up to the house," he says. "This led to the idea of a turf deck – a rooftop garden on top of a summer house, with a glazed entry and stairwell down into the new structure."

Coltart says the owners wanted a modern summer house, but it needed to look as though it could have been built with the rest of the house. For this reason, an octagonal turret form on the house was repeated in the design, starting with the glazed entry pod on the rooftop garden.

"We dappled the turret form back down the garden, almost like a series of trees. The stairwell in the circulation tower leads down to an octagonal seating turret and shower room in the summer house and a circular spa pool and fire pit outdoors," says Coltart.


"On the lower level, the building mimics the shape of the existing house, but we changed the materiality. In place of weatherboards, we introduced a solid, more robust, monolithic structure, which is penetrated by the light form of the stairwell."

Coltart says the stained glass on the entry turret reflects the Victorian appreciation of transitions between elements in nature.

"The stained glass is a decorative expression softening the transition from the steel columns to the glass roof."

Because the owners wanted to retain an existing magnificent cabbage tree, the summer house was built around this. There is also a water feature that can be seen from the spa.

First published date: 15 May 2011

More news from Trends

Credit List

Architect Matt Coltart ANZIA and David Craig ANZIA, Craig & Coltart Architects (Wellington)
Builder David Hadfield and Mark Allan, Riverdale Construction Services
Landscape designer Jamie Reid, Design Matters
Arborists Kerei Thompson; Bark Ltd
Doors and windows Timber windows by Cooper Furniture & Joinery; steel windows, copper details and sculpture by Architectural Roof & Facade Innovations, with Fusion Engineering
Stained glass windows Pukerua Glass Studio
Window and door hardware Allart solid bronze hardware, supplied by FL Bone
Tile flooring Travertine from Bramco Granite & Marble
Paints and varnishes Resene; PPG Industrial Coatings
Lighting ECC Lighting & Furniture
Heating Enersave Products; Abode Air Conditioning
Sauna Klafs, from Walrus Spa Designers
Kitchen benchtop Corian
Kitchen cabinets Cooper Furniture & Joinery