Details

This design is compliant with the 2024 International Residential Code (IRC) and the 2024 International Energy Conservation Code (IECC). It is an all-electric home that uses no natural gas plumbing fixtures, features a Cold Climate Air Source Heat Pump (CCASHP) capable of operating in temperatures as low as -22 degrees F and meets Electric-Ready Residential Building Provisions as outlined in the 2024 IRC. Additionally, all appliances will be Energy Star rated and all plumbing fixtures will adhere to WaterSense standards.

This ADU is built to be solar PV (photovoltaic) ready with a minimum of 250 sq ft of unobstructed southern roof exposure on a 6:12 pitch, the roof trusses are designed to support future solar panel weight and it includes a 225A solar-ready electric panel complete with a two-pole breaker situated opposite the main circuit breaker on the electrical bus. The main electrical panel is designated “solar ready” at a 225A rating with four feet of unobstructed wall pace adjacent to the main electrical panel will accommodate future solar PV installations. This design is detailed to be compliant with Appendix BE of the 2024 IRC regarding Radon Control Methods.

This design leverages widely available materials that are conventionally installed and of standard dimensions, ensuring the creation of an affordable, buildable home. The straightforward form combined with commonly used building techniques makes construction uncomplicated. Even-numbered exterior dimensions minimize waste and reduce overall costs.

The passive solar design for this all-electric, solar-ready building features a small footprint, allowing for minimal energy consumption for heating and cooling. The use of WaterSense plumbing fixtures and Energy Star appliances further enhances energy conservation. Applying even-numbered dimensions for the block, wall framing, and roof trusses reduces both waste and embodied energy.

Thanks to its compact footprint, this home can be optimally positioned on a variety of lot configurations. While the overall orientation is established for maximum passive solar benefits, the plans provide for either a front or side entry. As a smaller home, a slab on grade foundation can accommodate most terrains, and an optional stem wall with a crawl space extends adaptability to additional slopes.

The alternative floor plan complies with FHA (Federal Housing Administration) guidelines, ensuring accessibility through appropriate dimensions, clear access, and door swing adaptations for kitchen and bathroom areas. The design includes barrier-free entry and a maximum threshold height of 1/2 inch. Provisions for grab bars, a walk-in shower, and accessible appliances will be included in the construction plans.

The design presents a seemingly simple yet fully functional home that seamlessly melds with both historic and contemporary aesthetics. Additional customization is easily achievable by rearranging elements from the two optional plans, allowing for unique kitchen, bathroom, and closet layouts. Incorporating sustainable, accessible, and affordable features within a straightforward configuration creates an appealing and innovative solution for diverse homeowners.

  • The foundation options include slab on grade or a wood floor over a crawl space.
  • There is an optional covered front porch.
  • There is a choice of exterior roofing, siding, and entry door style.
  • The windows can be operable, fixed, or omitted, as permitted by code.
  • This design includes two distinct interior floor plans - mirrored versions are also available for a total of 8 different floor plan options (4 are shown below).
  • Customization is offered for interior doors, cabinets, and countertops.