Small Scale Residential

Altadore Eco House

Altadore Eco House

Calgary, AB

Award Winner
Green T Design

Project Team

Architect: Bob Thornton, Studio T Design
Designer/Builder/Maintenance: Kerry Ross, Green T Design
General Contractor: Peter de Roy, Peter Built Construction

An Ecological House for an Active Family

With a love of plants, animals and their environment, a veterinarian couple sought to develop an ecologically-designed custom house for their active family. Located in Calgary’s Altadore community, this newly built single family home includes four extensive green roofs across the house.

Designed for passive solar, the house uses space and energy effectively and efficiently. The orientation of windows provide natural light and winter warmth; while in the summer the overhangs and glazing create the shading necessary to keep comfortable interior temperatures.

The loose-laid green roofs are located adjacent to private living spaces, creating opportunities to bring nature closer to sleeping areas. Different plant communities were used for each roof; a grass roof which serves as a bedroom screen; a perennial garden on the upper courtyard; a chive meadow on the back roof; and a wildflower meadow on the bicycle shed. The roofs help mitigate stormwater runoff locally by reducing the amount of sealed surfaces, as well as providing additional opportunities urban wildlife habitats.

The geometry of the house was designed to create south-facing sloped roofs for a 3.3 MW array of solar panels and lower flat roof portions for green roofs. A protected courtyard at grade and the front-facing green roof above resulted in favourable microclimates for outdoor living spaces and produces lush growth of flowering perennials on the green roof.

Judges praised this project for its visual accessibility both inside and out, as well as the drive to create such a highly sustainable and efficient single family home.

Hedgegate House

Hedgegate House

Sea Ranch, CA

Award Winner
AE Design

Project Team

Architectural Photographer: Jonnu Singleton
Growing Media Supplier: Joe DiNorscia, Rooflite
Owner/Architect/Construction Manager:Janet MacKinnon, AE Design
Rainwater/Graywater Systems and Green Roof & Irrigation: Kevin Heston, AE Design
Stormwater, Graywater, and Living Roof Design: Paul Kephart, Rana Creek Design
Structural Engineer
: Ivan Lee Welte, I.L. Welte & Associates

By raising the native meadow to a living roof, Hedgegate softens the foreground and preserves the public view of the California Coastal National Monument
— Janet MacKinnon, AE Design

A Biophilic Residence Along the Pacific

Hedgegate is located on the west side of California Highway 1 on the scenic, north Sonoma coast. From the highway, the view to the Pacific Ocean and the California Coastal National Monument is protected by legislation to preserve this natural wonder for public appreciation. The protective legislation placed significant controls on the design of Hedgegate. The structure was limited to 1300 square feet and the height limited to 16 feet above above the coastal meadow. The limited conditioned space interdigitates with protected outdoor spaces and the ready access to the exterior on both the ground floor and upper (main) level encourage outdoor living.

William Browning’s work on the 14 Patterns of Biophilic Design provides a vocabulary to discuss the design architects intuitive integration of “spatial configurations in Nature commingled with patterns of Nature in the Space and Natural Analogues.”

The Hedgegate design provides abundant visual connection with Nature as well as non-visual connections: the sound of surf, the bark of seals, the caw of crows and seagulls, the call of California quail and the smell of grasses and salt air. The sounds of flowing water from the rain room provide the analogue to a native stream. The unimpeded view of the Pacific Ocean and shoreline whitewater yield a prospect both stimulating and inviting. In contrast, the back corner of the rain room, its green walls and flowing water create refuge from the circulation of the household and natural elements. The view from this back corner expands to a panoramic view of the Pacific Ocean providing the mystery and anticipation of more beyond the refuge. Entering and exiting Hedgegate stimulate the senses with variable airflow and temperatures. The numerous angles, skylights and open roofs provide changing conditions of light and shadow. The native plants lifted to the roofs reflect the local coastal meadow. As one climbs the stairs into Hedgegate, more of the living roof becomes visible, then the green wall appears, and finally when the top of the stairs, the view opens and one looks down, from the safety of solid footing, 15 feet into lush vegetation and flowing water of the rain room. A slight turn of the head to the left, and the first glimpse of the oceanic views draws one further into the living space with the promise of more.

Built during a severe 5 year drought, it was important to maximize use of all available water. The rainwater/stormwater from the roof, retaining wall, rain room, and driveway, is collected for irrigation of the living roof and graywater is collected for irrigation of the ground landscaping. The judges praised this project for its integration both into the site’s ecology, as well as the region’s broader cultural goals.