Builder may refer to:
- Construction worker, who specializes in building work
- Carpenter, a skilled craftsman who works with wood
- General contractor, that specializes in building work
- Subcontractor
- Real estate developer, who causes buildings to be constructed
- Builder (United States Navy), U.S. Navy Rating
- Builder Homesite, a consortium of American home builders
- Builder pattern, an object-oriented design pattern
- Interactive Scenario Builder, an RF Tactical Decision Aid often referred to as Builder
- Build engineer, a software engineer specializing in builds (versions) of large software products