• Office Building


    Delmastro Building Contractors specializes in new construction with focus in healthcare, hospitality, multi-family, mixed-use, distribution/warehouse and commercial office. Our clients return because we exceed their expectations in building quality, value and relationships. Our subcontractor relationships in the Phoenix Valley remain strong based on similar values in quality craftsmanship, collaboration, mutual respect and fairness.


  • Robert Delmastro

    Founder/Construction Operations

    Robert Delmastro

    A third generation builder and contractor, Bob began his career with Johnson Carlier where he was directly responsible for the management and administration of the firm’s Healthcare Construction division.   While with Johnson Carlier Bob was responsible for the management of over 100 projects representing more than $500 million. From 1999 to 2010 he co-owned a commercial construction company and now owns and operates Delmastro Building Contractors located in Scottsdale, Arizona. He has completed nearly $1 billion in construction to date.

    Bob holds a BS in Construction Engineering from Arizona State University and is an accredited constructor recognized with the American Institute of Constructors.

  • Julia webshot (2)

    Business Manager

    Julia Rosenkrantz

    Julia earned a business degree from California State Polytechnic University. She began her career as an insurance producer and office manager for a finance brokerage in southern California. She started in construction working under Bob Delmastro in 2008 as onsite office manager and project coordinator. She now manages subcontractor relations for over 500 subcontractors and is responsible for overall business, employee and finance operations.