Founded in 1930 by William Murphy, CPM Development is owned by Oldcastle Materials (itself a subsidiary of UK-based CRH plc), which bought the firm in 1997. CPM Development Corporation paves the way for aggregate production in the Northwest. The company produces sand and gravel, ready-mix concrete, pre-stressed concrete building components, and asphalt paving materials for the construction industry. It also builds freeways, overpasses, and airport runways. The firm has about a dozen affiliate companies and some 30 locations in Washington, Oregon, and Idaho.

Polkinghorn Group Architects provides architectural services for commercial, educational, and institutional projects. In addition to its work on high schools, colleges, churches, and libraries, Polkinghorn has a particular focus on health care facility design. The firm has worked on more than 350 projects mainly in Texas and Louisiana totaling nearly $1 billion. Completed projects include Austin Community College, Texas Orthopedics Surgery Center, Sunset Canyon Veterinary Clinic, and Holy Spirit Episcopal Church. Polkinghorn Group Architects was established in 1972.

HRH Construction has been polishing the Big Apple since 1925. Since that time, the company has provided general contracting and construction management services for commercial, institutional, hospitality, and other projects in New York City. It handles services ranging from scheduling and risk management to structural and electrical engineering. HRH's portfolio includes the Jacob K. Javits Convention Center and the the AT&T world headquarters. HRH is also a leading force in urban renewal; it has developed and built more than 45,000 affordable housing units in New York, Washington, DC, and elsewhere. The company was founded by the Horowitz and Ravitch families. HRH filed for Chapter 11 bankruptcy in 2009.

Aldridge Electric powers up the Windy City and other parts of the Midwest. The electrical contractor divides its business into six main areas: airport, industrial, power, drilling, highway, and transit. It works on projects ranging from Chicago's subway system to its airport runways. Additional activities include services for street lighting, traffic signals, high-voltage cabling and splicing, and foundation drilling. Aldridge Electric has worked for clients such as Commonwealth Edison Company and Exelon Corporation. The company is owned by CEO Ken Aldridge, grandson of company founder Leonard "Len" Aldridge, who started the business in the 1930s and incorporated it in 1952.

Construction aggregates supplier Luck Stone Corporation produces a wide range of crushed stone, concrete, asphalt, architectural stone, pavers, and sand and gravel products for customers throughout the mid-Atlantic US. The company has more than 15 crushed stone plants in Virginia and North Carolina, in addition to six retail architectural stone centers in those states and Maryland. It serves the construction, homebuilding, remodeling, and agricultural markets. The company also produces mulch, topsoil, and other specialty products for turf, landscaping, and sports-surfacing applications.

SWP Group makes products that take a swipe at rainwater. It supplies water drainage products to the construction and civil engineering industries through three principal subsidiaries. Its Fullflow Group, which operates in the UK, France, and Spain, makes large roof syphons and distributes pipework fittings to gas, water, and petrochemical customers. Its DRC Polymer Products unit makes polymer-based sheet materials for structural waterproofing, as well as fire and soundproofing in the UK. Its Crescent of Cambridge subsidiary is a leading UK manufacturer and installer of steel spiral staircases. The company is about one-fifth held by chairman Alan F. Walker and director Alan G. Smith.

Am-Mex Products helps companies set up maquiladora operations in the McAllen, Texas, and Reynosa, Mexico, border region. The maquiladora program allows US firms and other foreign companies to import raw materials into Mexico duty-free for assembly there by lower-wage Mexican workers. The program also offers faster startup, lower shipping costs, and central distribution. Its services include contract manufacturing, engineering factory management, warehousing and distribution, cross-border trucking, training, and other services required for international trade. Am-Mex has been in business since 1990 and has around 1 million sq. ft. of manufacturing and warehouse space in Mexico, in addition to its US operation.

Gohmann Asphalt & Construction is always on the road again (and making it possible for others to go there as well). The company provides construction, paving, and rehabilitation and repair services for highways, bridges, and parking surfaces in Kentucky and Indiana. It also provides grade and drain services. Gohmann Asphalt & Construction also owns and operates six asphalt plants, four concrete plants, two limestone quarries, a trucking company, and a company that specializes in commercial, residential, and industrial construction projects. Gohmann Asphalt & Construction was founded in 1950.

Toll Brothers builds luxury homes in the US, targeting move-up, second-home, and retired buyers. Its single-family detached houses and apartments range in price from about $230,000 to some $2 million. The company also develops communities for active adults and operates country club communities. Subsidiaries offer related services and products including insurance coverage, title and mortgage services, and landscaping. Like its peers, Toll Brothers closed on fewer homes with the housing downturn and financial crisis: It went from delivering nearly 8,600 homes in fiscal 2006 to fewer than 3,000 in fiscal 2009.

MCG Architects (which does business as MCG Architecture) specializes in designing and planning shopping centers and other retail buildings, as well as urban renewal projects and hotels. The firm provides consulting, surveying, site analysis, cost control, computer-aided design, and project management services; it also offers interior and graphic design services. Projects include the Centennial Centre in Las Vegas; Independence Corporate Center in Cleveland; and Natomas Town Center in Sacramento, California.

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