Builder

A builder is a person or company that constructs buildings and other structures. The term covers professionals who design, supervise, and execute construction projects, as well as firms that coordinate multiple trades. Builders may specialize as general contractors, home builders, or in specific trades such as carpentry, masonry, or roofing. They may also perform remodeling or renovation work.

In professional construction, builders coordinate design, permits, scheduling, procurement, and safety compliance. Licensing and qualification requirements vary by country or region, but many jurisdictions require contractors to carry liability insurance and to demonstrate competency through examinations and continuing training.

In software and technology, builder refers to a pattern or tool that creates complex objects. The builder pattern uses a separate builder to configure and construct the target object step by step, which helps manage optional parameters and invariants. Builders also appear as tools that orchestrate compilation, dependencies, and deployment in build systems.

In everyday use, "builder" can describe a hobbyist who constructs things, or a professional who builds environments such as stages, film sets, or landscapes. The term is widely applied across industries to denote individuals or organizations responsible for assembling components into a finished product or structure.