The Hikari Box Tiny House Plans


Bright, Open and Uncomplicated

The Hikari Box Tiny House is a modern tiny house design for a spacious and light-filled home with a relatively simple construction process. At 24 feet long, it has 184 square feet on the ground floor, with one 79 square foot loft for a queen bed and one 23 square foot loft for storage or a twin bed. A staircase leads to the queen loft with the option for storage underneath inspired by Japanese step tansu chests, and there’s ample storage in the kitchen as well.

Shelter Wise considers this the easiest tiny house they’ve ever built. Professional builders should find it simple to construct, and DIYers will benefit from some of the simplified construction details. The standing seam metal shed roof cuts out many complicated details common with gable or curved roofs, all the plumbing is located in one corner to avoid running plumbing pipes all over the house, and the tank-less water heater is mounted inside the wall for a clean installation process.

Fourteen windows and two skylights give the house its name — hikari is Japanese for “light-filled” — and make the house bright and sunny without sacrificing energy efficiency. In fact, this design includes unique details for one of the most energy-efficient tiny house floors you’ll find anywhere. Here’s Derin Williams, the designer and builder for the original Hikari Box, introducing the design:

The Hikari Box Tiny House is a clean, modern, tiny house design for individuals and couples ready to build their life on wheels.



What the Plans Include

  • Plans for a 24′ x 8.5′ foot modern tiny house design with eaves that extend out to 9 foot, six inches. Read our blog post on tiny house towing to understand more about tiny house width.
  • Detailed interior and exterior elevation drawings for all sides
  • Trailer connection details
  • Wall framing elevations
  • Roof framing plans
  • Cross sections of wall, roof and floor
  • Details for corners, windows, the door, and light block flashing
  • Suggested materials list for siding and framing
  • A basic wiring diagram
  • Appliance placement and suggestions
  • Double loft placements
  • Full kitchen
  • Lots of creative storage solutions
  • An egress window in the loft so it can be RV certified
  • A thoroughly energy efficient design. These plans include details for a unique, full R7 thermally broken floor assembly that could effectively host radiant floor heat (most floors would lose radiant heat warmth through contact with the metal trailer), but please note that radiant heat floor products or installation instructions are not a part of these plans.
  • Appliance and fixture recommendations to match the home shown in the pictures
  • A small exterior bump-out offers additional storage

These plans do not include electrical diagrams, plumbing diagrams, or exterior finish materials.  They don’t include construction details for the ladder shown leading to the small loft, or for the simple porch roof shown in the photos. But if you want a porch roof, we suggest that you mount it to the house after it is parked and avoid traveling with it attached. These plans are a license to build one house, and contain all of the essential nuts and bolts to get you a solid, extremely energy-efficient tiny home that is completely customizable to your tastes.

Weight and Trailer Considerations

When choosing a trailer for this house, Shelter Wise recommends 7,000 lb axles each, for a 14,000 lb total carrying capacity.  The trailer will still carry at 10,000 lb GVWR (Gross vehicle weight rating) but will travel better and safer with higher rated axles. Iron Eagle Trailers builds our favorite tiny house trailers out there, and Derin from Shelter Wise and Dee from PAD even helped them design their trailers to be perfect for tiny homes.  Tell them PAD sent you, and you’ll get $50 off your order.

Build Smart!

With all of our plans, we recommend a copy of Go House Go, our how-to manual for building a tiny house on wheels. It’s the book Dee wished existed when she built her little house, and she wrote it to save everybody else all the time and trouble that she went through to figure out how to build smart and safe.

Please note that all sales are final on digital products and returns are not available. Because, let’s be honest, there’s really no such thing as “returning” a digital product. We offer quality products at a great price, and we think you’ll be happy with them. If you have specific questions or concerns about a product before purchasing, just contact us and we’ll do our best to answer so you know exactly what you’re getting.


Terms and Conditions for Shelter Wise and Portland Alternative Dwellings Tiny House Plans

By purchasing these plans, you understand and agree to the following:

This design and plan is intended only for competent and knowledgeable builders. These plans assume general knowledge and skills, including but not limited to roofing, electrical, plumbing, and framing. These plans have not been approved by an architect or an engineer. If you are not an experienced builder, we recommend consulting with a licensed contractor prior to attempting to build a house from these plans. Contact your local building code officials to ensure you comply with local codes.

Any person or entity (hereinafter, “Builder”) engaging in the construction of a tiny house using the design of Shelter Wise, LLC or Portland Alternative Dwellings, LLC assumes the entire responsibility and liability for and agrees to hold Shelter Wise, LLC and Portland Alternative Dwellings, LLC harmless from any and all damage or injury of any kind or nature whatsoever to all persons, whether employees of Builder or otherwise, and to all property (including loss of use of such property) caused by, resulting from, arising out of, or occurring in connection with construction related to or based upon the construction design, plan, instructions, or other communication.



All text and designs (“plan material”) in Shelter Wise, LLC’s or Portland Alternative Dwellings, LLC’s  publications are copyright protected. Such material is intended to be used by individuals to construct a single tiny house. To build more than one house from this set of plans, you must purchase a new plan set for each subsequent home built.

If you are a professional tiny house builder, please contact us to inquire about Builder’s Volume Licensing for this tiny house plan set.

Intellectual Property

Shelter Wise and Portland Alternative Dwellings retain all rights to the intellectual property of the plan material. No rights in the intellectual property are transferred to the purchaser. Purchaser shall not remove any copyright or proprietary notices in or on the plan material.


Shelter Wise’s and Portland Alternative Dwellings’ designs are copyrighted. Any media coverage containing photos, plans, depictions, in-process projects or finished homes shared on social media, print, news, blogs, broadcast, etc, shall be expressly credited to Shelter Wise as the design source for each and every use or reproduction. Examples of proper credit include but are not limited to: including Shelter Wise and the name of the house, crediting www., #shelterwise, etc.


The reproduction, distribution, sale, or any other transfer of the plan to any third party is prohibited, except that up to 2 copies may be made and distributed to contractors working on the construction of your tiny house. All copies made for such purpose must be destroyed at completion of construction.


All sales of digital products are final and returns are not available.

Commercial Use

The use of the plan for any commercial purpose is strictly prohibited. Commercial use includes, but is not limited to, construction of more than one tiny house per plan purchased, re-sale of more than one tiny house, the renting of two or more tiny houses per plan purchased, or the reselling of plan materials in whole or in part.


Shelter Wise, LLC or Portland Alternative Dwellings, LLC retains ownership of the intellectual property of the plan materials regardless of any customization, modification or alteration of the plan by a purchaser or builder.

Governing Law

Any matters arising out of or related to the plan materials shall be governed by Oregon law.

The Hikari Box Tiny House Plans