# Mighty Buildings
**Mighty Buildings** is an American construction technology company, founded in [Oakland, California](https://www.edgepedia.org/oakland-california) in 2017, that produces prefabricated homes and accessory dwelling units (ADUs) using 3D-printed components manufactured in a factory and assembled on site.[1](https://seedtable.com/companies/mighty-buildings) • [2](https://www.axios.com/2021/10/25/3d-printed-houses-homes-sustainability-affortable-housing) The company describes its mission as transforming housing construction through high-quality, sustainable, and climate-resilient prefab homes.[3](https://www.mightybuildings.com/press-release/mighty-buildings-raises-52-million-co-led-by-aramcos-waed-ventures-and-bold-capital-to-accelerate-global-expansion)
| Key fact | Detail |
|---|---|
| Founded | 2017, Oakland, California[1](https://seedtable.com/companies/mighty-buildings) |
| Core product | 3D-printed modular panels produced in a factory and delivered to the lot for assembly[2](https://www.axios.com/2021/10/25/3d-printed-houses-homes-sustainability-affortable-housing) |
| Certification | First 3D-printed construction company to achieve UL coverage under UL 3401, the standard for evaluating 3D-printed building structures and assemblies[4](https://www.probuilder.com/home/article/55226215/3d-printed-adus-come-to-life-in-california) |
| Funding | $40 million Series B (February 2021); $52 million later round co-led by Aramco's Wa'ed Ventures and Bold Capital[1](https://seedtable.com/companies/mighty-buildings) • [3](https://www.mightybuildings.com/press-release/mighty-buildings-raises-52-million-co-led-by-aramcos-waed-ventures-and-bold-capital-to-accelerate-global-expansion) |
| Flagship community | Quatro, Rancho Mirage, California: 30 zero net energy homes, each with an ADU[5](https://www.mightybuildings.com/projects-and-designs) |
| Company status | Put up for sale in January 2025; technology and brand sold to Lumus Inc[1](https://seedtable.com/companies/mighty-buildings) |
## Technology and production
The company's method differs from on-site 3D printing. At its factory, Mighty Buildings 3D-prints modular panels, which are then shipped to the building site and put together there.[2](https://www.axios.com/2021/10/25/3d-printed-houses-homes-sustainability-affortable-housing) For its Super Quatro design, architectural components are printed off-site and assembled as panelized building elements, which the project's architects describe as allowing homes to be delivered with greater precision and quality control.[6](https://jzmkpartners.com/project/mighty-buildings-super-quatro/)
The company has stated that its printing process eliminates 99% of construction waste, and that its Rancho Mirage project pairs solar energy and weather-resistant materials with efficient home operations to minimize environmental impact.[7](https://jbrec.com/wp-content/uploads/2021/03/2021-03-Master-Plan-Trend-Report.pdf)
**Certification.** Building codes do not directly address 3D-printed construction, so printed buildings are typically approved under alternative materials and methods provisions. Mighty Buildings became the first 3D-printed construction company to achieve UL coverage of a building assembly under UL 3401, an Outline of Investigation for 3D-printed building construction, according to Sam Ruben, the firm's vice president of compliance, sustainability, and partnerships.[8](https://code-authorities.ul.com/3d-printed-buildings/) UL, one of the largest American certifying agencies, collaborated with Mighty Buildings in developing the standard.[4](https://www.probuilder.com/home/article/55226215/3d-printed-adus-come-to-life-in-california) The company is also listed as an Oakland, California organization in ASTM work on material development standards for additive manufacturing in construction.[9](https://store.astm.org/stp163720200103.html)
## Products and projects
The company started out printing accessory dwelling units, small secondary homes that are one response to the housing shortage.[2](https://www.axios.com/2021/10/25/3d-printed-houses-homes-sustainability-affortable-housing) In late 2020 it had more than 20 ADUs under contract throughout California and had partnered with a Beverly Hills developer to apply its technology to multifamily projects in Los Angeles.[4](https://www.probuilder.com/home/article/55226215/3d-printed-adus-come-to-life-in-california) The company offers a turnkey service: it assembles permit packages, pours the foundation, connects utilities, and installs the prefabbed unit.[4](https://www.probuilder.com/home/article/55226215/3d-printed-adus-come-to-life-in-california)
Owners have used the Oakland-built units as rentals, a pool house, housing for in-laws, and in one case a photo studio; in November 2020 the company delivered a unit to an East Oakland resident's backyard for use as a rental.[10](https://www.sfchronicle.com/bayarea/article/Oakland-factory-3-D-prints-small-units-to-deliver-15708632.php) The Mighty House, a modular ADU design built by Mighty Buildings with architect EYRCWorks of Culver City, received a 2021 award from The Chicago Athenaeum, which noted that the homes can be placed on any site where zoning allows.[11](https://www.chi-athenaeum.org/the-2021-awards/2021/11/01/mighty-house-california-2021/) • [12](https://usmodernist.org/RD/RD-2021-4.pdf)
**Quatro.** The company's development in [Rancho Mirage, California](https://www.edgepedia.org/rancho-mirage-california) was described in a 2021 industry trend report as poised to become the first planned community of 3D-printed homes.[7](https://jbrec.com/wp-content/uploads/2021/03/2021-03-Master-Plan-Trend-Report.pdf) The southern California development contains 30 zero net energy homes, each with an ADU, set in mountainous desert landscape.[5](https://www.mightybuildings.com/projects-and-designs)
## Funding and corporate history
Mighty Buildings raised a $40 million Series B in February 2021.[1](https://seedtable.com/companies/mighty-buildings) A later $52 million round was co-led by Wa'ed Ventures, the venture arm of [Saudi Aramco](https://www.edgepedia.org/saudi-aramco), and Bold Capital, with funding earmarked to scale production of new homes for the U.S. market and to establish manufacturing operations in Saudi Arabia and the [United Arab Emirates](https://www.edgepedia.org/united-arab-emirates). Fahad Alidi, Managing Director at Wa'ed Ventures, cited the company's proprietary 3D-printing materials as a driver of scalability for homebuilding in the Gulf region.[3](https://www.mightybuildings.com/press-release/mighty-buildings-raises-52-million-co-led-by-aramcos-waed-ventures-and-bold-capital-to-accelerate-global-expansion)
The company was put up for sale in January 2025, and its technology and brand were sold to Lumus Inc.[1](https://seedtable.com/companies/mighty-buildings)
## Context
Mighty Buildings entered a market in which 3D-printed home construction was moving beyond pilot projects, with competitors such as [Austin, Texas](https://www.edgepedia.org/austin-texas)-based ICON delivering printed homes and raising expansion capital.[2](https://www.axios.com/2021/10/25/3d-printed-houses-homes-sustainability-affortable-housing) Its focus on factory-printed panels for ADUs aligned with rapid growth in California's ADU market, where state and city rule changes drove large permit increases in cities such as San Diego and Seattle.[13](https://www.axios.com/local/san-diego/2024/06/17/adu-development-surge-bonus-program) • [14](https://www.axios.com/local/seattle/2023/07/12/seattle-accessory-dwelling-units)
## References
1. [Mighty Buildings — Funding, Investors & Team, Seedtable](https://seedtable.com/companies/mighty-buildings)
2. [3D-printed houses poised to go mainstream, Axios (October 25, 2021)](https://www.axios.com/2021/10/25/3d-printed-houses-homes-sustainability-affortable-housing)
3. [Mighty Buildings raises $52 million co-led by Aramco's Wa'ed Ventures and Bold Capital, Mighty Buildings press release](https://www.mightybuildings.com/press-release/mighty-buildings-raises-52-million-co-led-by-aramcos-waed-ventures-and-bold-capital-to-accelerate-global-expansion)
4. [3D-Printed ADUs Come to Life in California, Pro Builder](https://www.probuilder.com/home/article/55226215/3d-printed-adus-come-to-life-in-california)
5. [Mighty Buildings — Projects & Designs](https://www.mightybuildings.com/projects-and-designs)
6. [Mighty Buildings — Super Quatro, JZMK Partners](https://jzmkpartners.com/project/mighty-buildings-super-quatro/)
7. [Master Plan Trend Report, March 2021, John Burns Research and Consulting](https://jbrec.com/wp-content/uploads/2021/03/2021-03-Master-Plan-Trend-Report.pdf)
8. [3D Printed Buildings and UL 3401, UL Solutions Code Authorities](https://code-authorities.ul.com/3d-printed-buildings/)
9. [Material Development Standards and Methods for Additive Manufacturing in Construction, ASTM](https://store.astm.org/stp163720200103.html)
10. [Oakland factory 3-D prints small units to deliver faster, cheaper housing, San Francisco Chronicle (November 2020)](https://www.sfchronicle.com/bayarea/article/Oakland-factory-3-D-prints-small-units-to-deliver-15708632.php)
11. [Mighty House | California | 2021, The Chicago Athenaeum](https://www.chi-athenaeum.org/the-2021-awards/2021/11/01/mighty-house-california-2021/)
12. [For Architects and Builders, Residential Design (2021)](https://usmodernist.org/RD/RD-2021-4.pdf)
13. [Controversial ADU program accounts for fraction of spike in granny flat permits, Axios San Diego (June 2024)](https://www.axios.com/local/san-diego/2024/06/17/adu-development-surge-bonus-program)
14. [Seattle goes big on accessory dwelling units, Axios Seattle (July 2023)](https://www.axios.com/local/seattle/2023/07/12/seattle-accessory-dwelling-units)
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*Topic: Encyclopedia › Technology and the built world › Engineering and manufacturing › Manufacturing industries and companies*
*Initially written Oct 15, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license