What GAO Found
Numerous housing construction technologies could help improve production, reduce costs, and potentially increase supply and affordability. Some technologies are mature but not widely adopted, and others are new or emerging. These technologies can be grouped into three categories: planning and design, construction means and methods, and building materials and components. Examples are shown in the figure below.
Examples of housing construction technologies
Benefits of housing construction technologies such as these may include:
Faster construction and enhanced efficiency. For example, building a house or some of its components off-site in an efficient, controlled environment can reduce the overall project time.
Reduced costs. For example, automated technologies that cut lumber to precise dimensions can reduce costs by minimizing waste.
Improved decision-making and regulatory oversight. Software tools that use land and regulatory data can help planners understand how local policy decisions can inform housing construction outcomes.
Challenges limiting broader adoption and use of construction technologies include:
Regulatory challenges. More than 20,000 jurisdictions administer residential building codes, requiring significant time, labor, and money to comply.
Workforce and education gaps. Training on new technologies requires staff, time, and money that builders may not have.
Financial challenges. New technologies can have high up-front costs that are more than traditional construction methods for both builders and consumers.
GAO identified five policy subgoals and 14 associated policy options related to the broad goal of increasing housing supply and improving affordability (see below). These policy options are a set of alternative actions that policymakers, such as legislative bodies, government agencies, standards-setting organizations, industry, and other groups, could consider taking.
Policy Subgoals and Policy Options to Help Increase Housing Supply and Improve Affordability Using Construction Technologies
Subgoal: Streamline regulatory processes
Policy options:
Establish state or regional building code authority with interstate reciprocity for off-site-constructed housing (report page 24)
Develop regulatory pathways for new technologies (report page 25)
Standardize oversize load permitting for interstate transportation of housing modules or components (report page 25)
Support zoning and development conditions that enable innovative housing construction (report page 26)
Implement and scale preapproved housing design libraries (report page 27)
Subgoal: Reduce financial barriers
Policy options:
Provide financial incentives for housing suppliers to use innovative methods (report page 28)
Provide financial incentives and products to support consumers (report page 29)
Subgoal: Increase housing production capacity through education and training
Policy options:
Expand vocational and technical education pathways for innovative construction (report page 31)
Engage labor unions as partners in expanding the off-site construction workforce (report page 32)
Train and certify building inspectors and code officials in innovative construction methods (report page 33)
Subgoal: Increase public acceptance of innovative housing options
Policy option:
Support public education campaigns on housing construction technologies (report page 34)
Subgoal: Optimize government resources and leadership
Policy options:
Increase government support for technology adoption (report page 35)
Build a national housing construction data infrastructure (report page 36)
Prioritize federal research and development activities to better support housing construction technologies (report page 37)
Source: GAO. | GAO-27-108037
Why GAO Did This Study
Housing affordability is a top concern for many Americans, as high housing costs can lead to adverse economic and social effects. Owners and renters have seen housing costs increase faster than other consumer prices and income, straining household budgets.
While housing construction is a near-trillion-dollar industry, limited inventory contributes to housing unaffordability, as potential homebuyers and renters compete to purchase or rent housing. GAO reviewed technologies that could help improve production and reduce costs of housing.
This report examines (1) current and emerging technologies that could help increase supply and affordability of housing, (2) benefits and challenges associated with these technologies in comparison to traditional construction methods, and (3) policy options that could support various policy goals related to these technologies.
To conduct this technology assessment, GAO reviewed relevant literature, documents, and reports; interviewed officials and representatives from government, industry, academia, nonprofits, and trade associations; conducted site visits; attended conferences; and convened a 2-day meeting of 17 experts.
For more information, contact Karen L. Howard at howardk@gao.gov.
Source: GAO Reports & Testimonies · 2026-11-10