UMaine Will 3D Print Nine Homes for Homeless Families in Greater Bangor

What is being built

The University of Maine Advanced Structures and Composites Center will design and produce nine 600-square-foot homes for people experiencing homelessness in Greater Bangor. Each unit has one bedroom, one bathroom, and a combined kitchen and living room. The homes will be constructed using BioHome3D, the university's bio-based 3D printing technology that uses wood fiber from Maine sawmills as its primary feedstock.

The project is moving into the design and site planning phase. Penquis, the nonprofit partnering with UMaine on the build, has already identified architectural and engineering firms and is evaluating a location in Brewer. A specific address has not been announced publicly yet.

Where the money came from

U.S. Senator Susan Collins announced $4 million in congressionally directed spending for the project. Penquis has already secured $3 million in federal, local, and private funds to support land preparation and neighborhood infrastructure. That brings confirmed project funding to $7 million.

Collins framed the project as a test case for other communities dealing with housing shortages. The technology is uniquely well suited to Maine's context: the state produces substantial sawmill waste, and the homes are designed to handle harsh winters without the energy losses that affect conventional construction.

How BioHome3D works

BioHome3D is a 3D-printed housing system developed at UMaine's Advanced Structures and Composites Center. The feedstock is a mixture of recycled plastic and wood fiber waste from local sawmills. The printer deposits the material in layers to produce wall panels and structural sections, which are then assembled on site.

A 600-square-foot prototype of the home was unveiled on UMaine's Orono campus in 2022. That building has been standing through Maine winters, giving the team real-world data on thermal performance and material durability. The nine-home neighborhood scales that prototype into a functioning community rather than a single demonstration unit.

The center uses what it describes as the world's largest polymer 3D printer for the production work. That scale matters: printing entire wall sections at full size reduces on-site assembly time and makes it feasible to produce a neighborhood rather than isolated units.

Why this approach is different

Most 3D-printed housing projects rely on concrete or specialized mixtures that require local supply chains and curing time. BioHome3D's wood-fiber feedstock is different in two ways. First, it is locally sourced, which cuts material transport costs and keeps the supply chain within Maine. Second, the bio-based composite is designed to be recyclable at end of life, which is a meaningful distinction in an industry where many printed homes end up in the same waste stream they were meant to avoid.

The insulation performance of the printed walls is one of the practical advantages. Maine winters regularly drop well below freezing, and conventional affordable housing often fails at containing heat. The wood-fiber composite used in BioHome3D performs better on thermal resistance than standard stick-framed construction at the same wall thickness, which translates directly into lower heating costs for residents.

The housing context

Bangor faces a documented shortage of affordable rental units. A 2025 city housing report estimated a gap of up to 700 rental homes for households earning less than $35,000 annually. Though the city represents roughly 2 percent of Maine's total population, it accounts for about 12 percent of the state's homeless population, according to a separate city needs assessment.

Nine homes will not close that gap. What they can do is test a model. If BioHome3D proves cost-effective at neighborhood scale, the same approach could be replicated in other parts of the state and other states with forest product industries. UMaine has already received roughly $72 million in prior federal funding for BioHome3D research, according to Collins's office. The August 2026 announcement represents the first transition from prototype to occupied housing.

What to watch

The project timeline is not finalized. A one-year build window has been referenced by project officials, but construction has not started and no groundbreaking date has been set. Permitting, design review, and site preparation all need to clear before printing begins. If the neighborhood is completed on schedule, it would be the first BioHome3D community in Maine and one of the first 3D-printed affordable housing developments in the country occupied by actual residents rather than used as a marketing demonstration.