Demolish & Build 3 is a first-person simulation game where players assume the role of a demolition company owner. Core gameplay involves accepting contracts to demolish and construct various structures, managing a growing business, and utilizing a broad selection of tools, equipment, and vehicles. Players can operate machines like excavators with interchangeable attachments such as shears and jackhammers to perform specialized tasks.

The game features a realistic physics-based demolition model where structural elements interact dynamically. Players begin with minimal resources and progress to owning an extensive vehicle park. Missions encompass a range of activities including crushing, cutting, digging, leveling, transporting, and building.