net zero energy

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

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.