The STO Building Group is committed to being the world’s premier construction services provider of a complete range of services, from site selection analysis, design constructability review, and aesthetic enhancements to interior fit-outs, new building construction, and building infrastructure upgrades and modernization. The STO Building Group family of companies—Structure Tone, Structure Tone Southwest, Pavarini Construction Co., Pavarini McGovern, LF Driscoll, 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.