Abbott Joins STO Building Group

An exciting merger. Abbott Construction is pleased to announce that we have merged with STO Building Group to become a member of the STOBG family of companies. This merger will allow both firms to leverage each other’s geographic reach to better serve our clients with multiple locations, and enhance the services and areas of expertise we can offer across that expanded footprint.

“We see joining the STO family as an exciting next step in what we can offer our clients and our employees without sacrificing who we are and have been for the past 35-plus years,” says Troy Stedman, president and CEO of Abbott. “We know from first-hand experience working together that our companies value integrity, collaboration, and a client-first way of doing business, so formally joining forces makes perfect sense.”

“The Pacific Northwest has been a key strategic market for the STO Building Group, and Abbott is a terrific addition to our family of companies,” says Robert Mullen, STO Building Group CEO. “By joining forces, both firms can leverage each other’s geographic reach and take advantage of each other’s strengths, relationships, geographies, and resources to better serve our clients across the globe.”

Formerly operating as the Structure Tone Organization, STO restructured as the STO Building Group in 2018 to provide a platform for growth that allows each of its member companies to maintain their cultural identity while leveraging the strengths of a multicompany organization. In the last four years, Canadian firm Govan Brown and US firms Ajax Building Company, BCCI Construction, and Layton Construction have merged with STO Building Group.

“The opportunity to merge with such an incredible firm as Abbott is exactly why we shifted our structure to STO Building Group,” says James Donaghy, STO Building Group executive chairman. “We value the reputation and heritage of the firms who merge with our organization, and each has kept its identity as a way to honor that legacy. As we continue to grow, we want to respect that history, but also reflect the collective expertise our companies offer and allow our employees to benefit from the larger organization’s resources.”

Now part of the STO Building Group family of companies, Abbott Construction will continue to maintain our brand identity, company culture, and staff. Our current leaders will retain an ownership position in the organization while continuing in their roles as the senior leadership team of the business. It is anticipated that new job opportunities will be created as a result of the merger to support the company’s projected growth for 2021 and beyond.

About the STO Building Group

The STO Building Group family of companies—Structure Tone, LF Driscoll, Structure Tone Southwest, Pavarini Construction Co., Pavarini McGovern, Govan Brown, Ajax Building Company, BCCI Construction, and Layton Construction—includes over 3,300 employees located in offices throughout the US, Canada, UK, and Ireland. We provide a complete range of construction management services, from site selection analysis, design constructability review, and aesthetic enhancements to interior fit-outs, new building construction, and building infrastructure upgrades and modernization. Learn more about us at


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