Photovoltaic System

Bellevue Net Zero

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Design for a new single family house on a suburban lot at the end of a cul-de-sac. 4700 square feet, 5 bedrooms, 5 bathrooms, with a 600 square foot Accessory Dwelling Unit. A residential elevator will bring homeowners and guests up to the top level great room with its views to the southeast. Exterior siding to be stained cedar boards with rusty steel panels for an accent. Walls will be R-35 Structural Insulated Panels, windows will be triple glazed, and the roof has room for a huge 14kW solar array. This project is in the schematic design phase.

Huff / Craven Net Zero House

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Design for a new net-zero-energy house including an airtight and superinsulated enclosure, heat recovery ventilation, and photovoltaic array.  Exposed beams in double height living room ceiling. Detached Accessory Dwelling Unit (DADU) wrapped in weathering steel with spiral stair inside.  Completed in summer 2018. 

Aamodt Passive House

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Fine Homebuilding HOUSES 2019 Best Energy Smart Home award winner (click for article)

New Passive House on a hilltop in Carnation, WA.  Three bedrooms, two baths with an attached four-car garage.  The aesthetics were inspired by rural barns which created an efficient building form to achieve the Passive House standard. This project was built by the homeowners themselves over the course of five years.

Net positive energy is achieved through super insulation, triple glazed windows, rigorous air sealing, a Heat Recovery Ventilator,  solar hot water, and PV panels.  The 8,800 gallon tank collects rain water from the roof to supply 100% of potable uses inside the house, the first house in King County (greater Seattle) to do so. Low toxicity materials were used throughout the building, most lumber is certified FSC, and the building is a Certified Passivhaus by PHIUS+. 

Click here for wall section, assemblies, and systems info for this house

Click here for detailed information on ecobuilding aspects of this house

Click here for 10 minute video by owner and architect about project

Roy Passive House

New custom house on blueberry farm in Moxee, WA.  Four bedrooms, three baths plus playroom loft.  All rooms except the loft are on one level allowing for aging in place.  The house orientation and room layout were determined by the principles of feng shui.

Natural materials are employed throughout, featuring stained concrete floors, clay plaster walls, and exposed wood roof rafters.  The exterior siding is flame blackened (shou sugi ban technique) to protect it without the need for painting.

Energy use reduction is achieved through super insulation, triple glazed windows, Heat Recovery Ventilator, mini split heat pump, solar hot water, and PV panels.  Certified Passivhaus by PHI.

Eastside Harvest House

New custom home, 4 bedroom, 3 bath, with 2 bedroom, 1 bath mother-in-law suite and 2-car detached garage.

The new house overlooks a half acre vegetable garden and fruit orchard which the owners tend. The view beyond is to a lake and mountains from all the principal rooms of the house.

Certified LEED for Homes Platinum and Built Green Emerald Star, with 17kW photovoltaic array, solar hot water vacuum tubes, and 12,000 gallon potable rainwater collection system.

Project Statistics

Location: Kirkland, Washington
Lot size:  41019 square feet (1 acre)
Number of units: 1 dwelling unit with attached mother in law suite
Total gross square footage: 4400 gross square feet (3570 conditioned)

Project Team

Architect: VELOCIPEDE architects inc
Contractor: Model Remodel LLC
Civil engineer: springline design, LLC
Landscape architect: Outdoor Studio
Structural engineer: Harriott Smith Valentine Engineers, Inc.
Mechanical engineer: Ecotope, Inc.
Solar designer: Solterra Systems, Inc.
Surveyor: Pacific Geomatic Services, Inc.
Geotechnical engineer: Geotech Consultants, Inc.
Arborist: Urban Forestry Services, Inc.

The Building of the Eastside Harvest House

Northwest Net Zero residence

New custom single family house, 5 bedrooms, 4 baths, with 2 car attached garage.  The homeowners requested a Northwest lodge style house.  VELOCIPEDE responded with a true timber frame structure, a shingled and stone exterior, and a wood burning masonry heater in the two story living room.

Interior finishes feature exposed timber beams, FSC certified fir ceilings and window trim, FSC certified cherry flooring and cabinets, slate tile flooring, and Venetian plaster walls.

Designed to be net zero energy and net zero water, with an 8.4 kW photovoltaic array on the roof, superinsulated and airtight SIP wall and roof construction, triple glazed windows, and 5100 gallon buried tanks for rainwater collection.  Certified LEED for Homes Platinum. 

PCC Natural Market - Fremont

Grocery store tenant improvement in ground floor of new mixed use building, 19541 ft2, in Fremont neighborhood of Seattle.  The new building offers a south facing patio, which functions as outdoor seating for PCC's deli. In addition to serving as a popular lunch spot, the rain canopy is comprised of photovoltaic panels that generate electricity from the sun. They are the first use of PV on a commercial business in Seattle.

The store's eco-friendly highlights include energy efficient fluorescent lighting, recycled structural steel, refrigerant that does not harm the ozone layer, and even an elevator that operates using biodegradable canola oil.  Special solar reflective glass installed at the south and west reduce by 50% unwanted solar heat gain that could wilt lettuce and unduly burden the air conditioning system.

Larson residence

New custom house in Tukwila, WA.  Two bedroom, two baths plus study loft with attached garage.  All rooms except the loft are on one level enabling aging in place, as well as visits by the owner's brother who is a wheelchair user.  The loft and adjacent roof deck have views in all directions to the surrounding mountains and to downtown Seattle.

Green features include double stud walls, radiant floor heating, a heat recovery ventilator, solar cool metal roofing, a 3 kW photovoltaic array, a planted roof, and a remarkable 95% construction recycling rate.  Certified Built Green 5-Star.