Building a house by hand can be both time-consuming and expensive. Some homebuilders have chosen to automate part of the construction instead.

A new Ukrainian homebuilding startup called PassivDom uses a 3D printing robot that can print parts for tiny houses. The machine can print the walls, roof, and floor of PassivDom's 410-square-foot model in about eight hours. The windows, doors, plumbing, and electrical systems are then added by a human worker.

When complete, the homes are autonomous and mobile, meaning they don't need to connect to external electrical and plumbing systems. Solar energy is stored in a battery connected to the houses, and water is collected and filtered from humidity in the air (or you can pour water into the system yourself). The houses also feature independent sewage systems.

Since the startup launched in spring 2017, it has received more than 8,000 preorders in the United States for its homes, which start at $64,000. The first 100 ones will be delivered in January 2018.

Check out the homes below.