The Construction Software Alliance is dedicated to promoting the best third-party solutions for
Sage 300 Construction and Real Estate (formerly Sage Timberline Office), Sage Estimating, and Sage 100 Contractor (formerly Sage Masterbuilder).

At the forefront for 40 years.

Running a better business starts with running better software. You’ve worked hard to get your company where it is today. While investing in new software technology can help you get to the next level, it’s not a decision you’re about to make lightly. We understand. Fortunately, choosing a new system doesn’t have to come down to sprinting ahead, planting your foot, and pushing off into the unknown.


Sage 300 Construction and Real Estate (formerly Sage Timberline Office) is the software you can trust because it’s trusted by more construction firms for accounting, estimating, project management, payroll, and job costing than any other construction management solution. With more than 40 years of industry know-how built right in, Sage 300 Construction and Real Estate is the software by which all others in the construction and real estate industries are judged. Instead of taking a leap of faith with a less proven solution, take a leap of confidence with the industry leader: Sage 300 Construction and Real Estate.


  • Most widely used software for construction job costing, payroll, estimating, and project management.
  • Trusted by more than 20,000 customers, including 65% of the ENR 400.
  • Over 40 years of construction know-how built in.
  • Experienced local partners get you up and running quickly.
  • Backed by world-class customer support you can count on.


No software provider has more experience providing a great experience.</strong> From the moment Sage made its bold entry into the construction market over 40 years ago, we’ve been dedicated to helping construction and real estate companies operate more efficiently. But our heritage isn’t only about software—it’s about how we serve our customers. The Sage customer experience starts with our commitment to delivering personalized and professional service at every stage and continues on as your business grows and its needs change. We make your investment in our solutions easy, beneficial, and rewarding.

The Construction Software Alliance

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