The clients are a couple with careers in travel and technology and their three children. We had the pleasure of working with them prior on their main residence in San Francisco. When they purchased their weekend home they asked Sutro Architects and our firm once again to collaborate on the design. The property had a 1-bedroom cottage, which they enjoyed for a summer to determine their needs for a new house. I fondly recall walking the property with them and standing on the top of one hill when we all agreed on the perfect location for their new dream home.
Architect: Sutro Architects
Interior Designer: Adeeni Design Group
Landscape Architect: Arterra Landscape Architects
Location: Healdsburg, California
Area: 18.36 acre vineyard
Residence: 3,181 square feet
In contrast to their city Edwardian that has lots of color, our clients wanted a minimal, contemporary design that integrated natural elements for warmth and had limited color. Also integration of the architecture with the vineyard landscape was a key factor in the design. The sloped terrain and optimal positioning of the house were constraints that contributed to the final size and configuration of the structure. Materials were chosen to blend in and enhance the landscape, rather than compete with it.
Our clients requested working with a neutral palette while utilizing fewer materials. The exterior is comprised of concrete, reclaimed barn wood, as well as blackened and CorTen steel.
The interior combines concrete, stainless and blackened steel, bronze, cedar and walnut against bright white gallery-style walls. We worked closely with the architects in selecting all materials, finishes and plumbing fixtures and accented the neutral scheme with colors inspired by the changing shades in the vineyard, mainly fresh green and golden honey. Sustainable modern and vintage furnishings add to the minimal and informal feel of the home. The dining tables were custom-made made from reclaimed barn wood and steel and can be rolled outside along with the indoor/outdoor dining chairs to take advantage of all spaces.
As with their city home our clients’ passion for sustainable living and philosophy to restore balance and fight against climate change were large contributors in this project. Passive house technology was integral to the design and utilized in the landscaping and interiors.
Adeeni Design Group
The Passivhausstandard requires the building to fulfill the following requirements:
- Passive Solar Design & Landscape – building is compact in shape to reduce surface area. Position of windows and overhangs to minimize heat gain in the summer. And minimizing overall house energy requirements. Internal thermal mass was incorporated in the construction to reduce summer peak temperatures and prevent overheating. The use of vegetation to shield the west façade was also incorporated into the design. Strategically placed trees and vegetation were also incorporated into the design. • Superinsulation to significantly reduce the heat transfer through the walls, roof and floor compared to conventional buildings.
- Advanced window technology: windows are manufactured with exceptionally high R values(low U-values for the entire window including the frame). The use of efficient double pane glazing and low-emissivity coatings, sealed gas inter-pane voids.
- Airtightness: Building envelopes under the Passivhaus standard are required to be extremely airtightcompared to conventional construction.
- Passive house is designed so that most of the air exchange with exterior is done by controlled ventilation through a heat exchangerin order to minimize heat loss (or gain, depending on climate), so uncontrolled air leaks are best avoided.
- Ventilation: Use of passive natural ventilationis an integral component of passive house design where ambient temperature is conducive – use of single and cross-ventilation was employed. Use of clerestory was also employed in the natural ventilation. Use of mechanical heat recovery ventilation system was employed.
- Space Heating: Because the heating capacity and the heating energy required by a passive house both are very low, the particular energy sourceselected has fewer financial implications than in a traditional building, although renewable energysources are well suited to such low loads. The goal of this house was to be as close to net zero as possible.
- Lighting & Electrical Appliances: use of sustainable lighting design using LED lamps, were used throughout the house. Sensors in some areas reduced energy consumption. The use of efficient appliances was employed.
The building was designed to have an annual heating and cooling demand as calculated with the Passivhaus Planning Package of not more than 15 kWh/m(4,755 BTU/sq ft; 5.017 MJ/sq ft) per year in heating or cooling energy OR be designed with a peak heat load of 10 W/m(1.2 hp/1000 sq ft) Total primary energy(source energy for electricity, etc.) consumption (primary energy for heating, hot waterand electricity) must not be more than 120 kWh/m(38,040 BTU/sq ft; 40.13 MJ/sq ft) per year. The building must not leak more air than 0.6 times the house volume per hour (n≤ 0.6 / hour) at 50 Pa (0.0073 psi) as tested by a blower door. Windows and doors are wood with aluminum-clad exterior. Manufacturer is Roeder windows and doors. They are high quality, efficient German design constructed with
environmental responsibility to reduce impact on the environment by purchasing wood from sustainable forest operations. The factory uses solar panels to support its energy needs and recycles wood shavings as fuel for heating systems in the manufacturing shop.
Water-based stains are used on all custom windows and doors. Windows are double and triple pane allowing for maximum efficiency techniques. Lighting is low voltage LED and all materials, finishes and furnishings were carefully selected for their green properties.
The garden includes lots of edibles included in the planting mix blueberries, herbs and native plantings with medium to low water ornamentals mixed in, as well as pollinators like lavender. Shade trees were planted on the south west side of the house for passive solar. Drip irrigation is utilized for medium to low water plants. The pool is salt water.
Claudia Juestel, founder & principal of Adeeni Design Group, was born and raised in Salzburg, Austria into a family of artists, craftsmen, musicians and hoteliers. Ms. Juestel has been formally trained in hotel management, cooking, fine arts and interior design. She brings 25 years of design experience to the firm’s projects, which range from traditional to contemporary styles.
Adeeni Design Group specializes in high-end residential and commercial interiors in the US, Europe, and Asia. Projects are known for a sense of timeless warmth, navigating seamlessly between modern and traditional influences. Without imposing a ‘signature’ look, the firm’s interiors are developed through a deep exploration of the clients’ needs and wishes. This personalized approach resonates as ‘set design for life’, a process that enhances the use of space while being highly collaborative and equally creative.
“Ultimately we won’t live there. We leave, and the clients have to feel that their home provides an often needed refuge from the world, and that it is a true extension of themselves they can present to their guests. In commercial projects the design, starting at the front door, has to express the brand in every detail.”, says Ms. Juestel. Whether designing an elegant historic mansion, a rustic ski retreat, a modern weekend house, a restaurant or a medical office, Ms. Juestel’s keen sense of color, her painstaking attention to detail, and her aim for absolute comfort and practicality shine through.
The firm’s work has been featured in many national and international publications.