3D-printed Accessory Dwelling Unit
3D-printed Accessory Dwelling Unit
3D-printed Accessory Dwelling Unit

First 3D-printed Accessory Dwelling Unit

March 19, 2024

The first non-combustible onsite 3D printed ADU in the USA is under construction in Walnut, CA. It is a 1200sf home with 2 Bedrooms and 2 Bathrooms. RKA’s Building and Safety team are providing ongoing inspection services for this first-ever type of ADU construction project. Printed with concrete, this building is naturally watertight, fire resistant and termite resistant, and more energy efficient. This method of on-site concrete construction provides sound dampening, a flexible contoured design, and the structure itself is recyclable.



How much does a 3D-printed house cost?
3D-printed houses cost about $10,000 to $400,000 on average, but pricing can vary based on the house's location, size, amenities and materials used.
How long would a 3D-printed house last?
Based on the comparable benchmarks, a well-constructed 3D printed house should last for a minimum of 100 years and could potentially last well over 300 years. Well-constructed means that there is no delamination between the 3D printed layers, and proper hydration has been maintained throughout the course of the build.
Are 3D-printed houses stable?
Generally, they are safer than traditionally constructed homes. 3D printed houses meet and exceed virtually all building codes and offer protection against natural disasters like hurricanes and earthquakes. They also offer improved fire-resistance.
Can you live in a 3D printed house?
While you may be wary about living in a 3D-printed home, these structures are livable. 3D homes are durable enough to be lived in, especially as they are made from concrete. A 3D-printed home is sturdy enough to protect its occupants from major natural disasters.
Does 3D printed house need foundation?
3D printed homes are generally made using concrete, which is also used for pouring the home's foundation.
Are 3D-printed homes warm?
The walls of 3D-printed homes are thicker than traditional building materials and less likely to transfer heat or cold. Additionally, the walls often include cavities for plumbing, electrical wires, and insulation. These qualities contribute to a highly comfortable and quiet home that costs less to heat and cool.
Do 3D-printed houses have drywall?
The interior walls will be made of drywall, although it's possible to construct the entire home of 3D-printed concrete. A big component of 3D printing is flexibility. You can print the footings, subfloor, joists, roof trusses and walls within a few weeks.
Are 3D-printed houses waterproof?
Yes, 3D printed houses can be made waterproof. Proper construction techniques and materials, such as waterproof coatings, membranes, and sealants, can ensure that the printed houses are resistant to water infiltration.
How long does it take to build a 3D printed house?
A 3D printed house can be finished in as little as 24 hours. Naturally, more complicated builds take longer. A new home can be printed in roughly 10 days using alternate, native materials that require additional processing.
What material is used for 3D printed house?
Most 3D printed housing projects you've heard of used concrete-like materials, but not necessarily concrete. That means they're using a mixture of cement, sand (or crushed stone or gravel), fibers, and occasionally other materials.
Are 3D-printed houses structurally sound?
3D printed homes are similar to traditionally built concrete houses in a variety of ways. Concrete is completely sound and has been used in architecture for centuries. It is still an excellent building material today for many modern structures.