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a tiny home kit used as an accessory dwelling unit ADU

Versatile Styles and Layouts

Customize your floor plan for any kit from Mighty Small Homes to fit any space on your property as an accessory dwelling unit.


View Our Floor Plans

Choose From Six Models


Our prefab kits come in six different designs. Select your favorite model, then customize the layout and add your choice of windows, doors, porches, lofts, and more.

Different house kits for sale by Mighty Small Homes
Carriage Kit Exterior

Two-Story Kits with a Garage


Need an ADU that can store your vehicles? Our Carriage model features an apartment above a garage, making it a popular choice for homeowners who want extra storage space.

More Space, Income and Savings


Whether you plan to build a new short-term rental, in-law suite, pool house, or workspace, any of our high-efficiency kits can be customized to match your vision for an ADU.

interior photo of a carriage house kit ADU
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Efficiency is Built-In


Our prefabricated home kits are 2-3 times more energy-efficient than traditional, stick-built homes – and stronger. You can expect to save up to 60% on your energy costs.

Easy to Build Yourself


Building our house kits as accessory dwelling units on your property is quick and easy. If you have basic carpentry skills and some handy friends, you can be under roof in 1-2 days.

photo of a cottage being built as an adu

Get A Free Estimate

If you’d like a more detailed estimate, just click below and we’ll have a representative get in touch.

Contact Us for a free estimate