A pre-engineered steel building can typically be completed in 6 to 16 weeks from start to finish, depending on size, design, and site conditions. Smaller buildings like workshops or garages can be ready in as little as 6–8 weeks, while larger commercial or industrial structures may take closer to 12–16 weeks. Because most components are pre-fabricated in a factory, construction time on-site is significantly reduced compared to traditional builds.