West Seattle

US Dept of Energy Housing Award Winner

Forever home adaptable to your future

  • 3 bedrooms, 2.5 baths
  • Property access from south, west, or north
  • 2,080 square feet

Estimated cost to build (Including PV System)


Learn how we calculate this »

PV system size

6.8 kW


Connecting the upper and lower floors, the tall, double-height space makes this family house feel like a modern palace. The upper floor can have bedrooms added as the family grows and subtracted when kids fly the nest. The office can easily be walled in to form a fourth bedroom, and the rec room meets code to easily form the fifth bedroom if required. Even the utility room meets code if you need a sixth bedroom!


Key Features

  • Aging in place
  • Long and wide first-floor bathroom
  • 3-bedroom home is adaptable to be a 6-bedroom home
  • Double-height living room
  • Kitchen island with bar
  • Large second-floor rec room
  • Second-floor office
  • Second-floor Juliet porch

General House Features

  • Affordable net-zero or net-positive design
  • SIPs Neopor shell (R-29 6.5” walls & R-49 10.25” roof)
  • SIPs roof creates vaulted ceilings
  • Vinyltek triple-pane windows (U-14 to U-16)
  • Post & beam construction allows easy future remodels
  • 4” Slab-on-grade floor for thermal mass
  • 4” R-20 under-slab insulation
  • NuDura insulated concrete forms (ICF) foundation
  • Optimized south-facing glazing & optimized daylighting
  • Built Green certifed
  • Heat pump heating & heat pump hot water
  • Heat recovery ventilator recovers a minimum of 80% of energy from outgoing air
  • Rooftop solar installed onto pitched roof to meet net-zero or net-positive
  • Electric car charger

What’s Included

36”x 24” black-and-white PDF pages. Floorplans and elevations at the ¼” = 1’ scale.

36”x 24” black-and-white PDF pages. Floorplans, elevations, sections, foundation plan, structural framing plan, roof plan, and construction details at the ¼” = 1’ scale.

36”x 24” black-and-white PDF pages + AutoCAD (.dwg) fles & Revit (.rvt) fles. Floorplans, elevations, sections, foundation plan, structural framing plan, roof plan, and construction details at the ¼” = 1’ scale.

Building Plans FAQ

For what building materials are the plans designed?

The walls and roof are SIPs (structural insulated panels), stem walls are ICFs (insulated concrete forms), and we specify a concrete slab-on-grade atop 4” of foam. We specify triple-pane windows and insulated exterior doors. We always specify a heat pump as the heat source. We also always specify an HRV (heat recovery ventilator) to meet ventilation code and ensure great indoor air quality.

What is a zero-energy home anyway?

Net-zero-energy homes combine energy saving techniques with renewable energy generation so that they produce as much energy as they consume over the course of a year. These ultra-efficient homes usually add energy to the grid when the sun is out and take energy from the grid at night and during the winter, boasting a net zero-energy consumption on an annualized basis.

Can I get a refund?

After you purchase and download any plans, we do not offer a refund. However, our mission is to ensure that you have a successful new home build. If the plan you purchased exceeds your build budget, or you are unhappy in any way, we will exchange for a different plan for free. You may also upgrade to a higher tier of the same plan and pay only the difference.

Can you engineer the plans for my lot?

If you are building in the state of Washington, we can arrange for our professional engineer (PE) to run the calculations and stamp your planset. If you are in another state, we can direct you to an appropriate engineer, and if needed, we will help with the process. Learn more about our process.

Are these plans code compliant?

Each of our plans has been built at least once, and all are compliant with the latest iteration of the International  Residential Code (IRC), which most U.S. jurisdictions have adopted. 

What size should I print the plans?

We deliver our plans in PDF format, and they are designed to be printed on 36″ x 24″ sheets of paper. The resulting scale is ¼” = 1’.

What climate are these plans designed for?

All of our homes have been designed for the Northwest region (Climate Zones 2 & 3) to generate at least as much power as they consume on an annualized basis. If you plan to build outside of this zone, some modifications may be required. Please contact us for more information.

View more FAQs »

Need mods to make this plan perfect?

Need a porch or garage added? Would you like to move the location of the front door? Want to rearrange the interior layout? We can help with any modifcations you require. Our customization service starts at $95 per hour.