UMaine to Build Nine 3D-Printed Homes With BioHome3D

The University of Maine's Advanced Structures and Composites Center is moving its BioHome3D technology from a single prototype to a small neighborhood. Through a new partnership with Maine nonprofit Penquis, UMaine plans to produce up to nine 3D-printed homes in the Greater Bangor area.

BioHome3D uses a composite material made from sawmill wood fiber and bio-resins. The original 600-square-foot prototype, unveiled in 2022, proved the concept worked. Floors, walls, and roof were all printed in three six-sided modules, then trucked to the site and assembled in roughly half a day.

Three Maine winters later, the prototype is still standing. That durability record matters now because UMaine has to convince building officials, buyers, and insurers that the homes meet real-world standards.

From Prototype to Production Line

The gap between one successful print and a repeatable manufacturing process is where most additive construction projects stall. UMaine's answer is a bigger printer. Factory of the Future 1.0, unveiled in April 2024, is four times larger than the machine that set the university's previous record in 2019. It is positioned as the engine that will drive BioHome3D toward commercialization.

Each group of homes built under the Penquis partnership gives researchers another round of data. Fire resistance, long-term weathering, and code compliance all need verification before the technology can scale beyond a controlled pilot.

The environmental case is strong. BioHome3D locks away an estimated 46 tons of carbon dioxide per unit. That figure stands out in a sector responsible for a large share of global emissions.

How It Stacks Up Against Other 3D-Printed Housing

ICON's Vulcan printer is already underpinning a 100-home community outside Austin, built in partnership with Lennar. In Houston, HiveASMBLD is constructing a 13-acre affordable housing development where 3D-printed ground floors support panelized upper levels. Both projects target the same problem UMaine is chasing: turning one successful structure into a production line.

UMaine's approach differs in material and scale. Where ICON uses concrete, BioHome3D relies on wood fiber. Where some programs hybridize traditional framing with printed sections, UMaine's modules arrive mostly complete. The result is a distinct path to affordable, sustainable housing, and the nine-home pilot will be the first real test of whether that path holds up at volume.