Yes, a building permit is typically required when replacing a bathtub with a walk-in shower.
According to local regulations in Denver and Centennial, permits are necessary because these projects involve altering plumbing, drainage, or structural elements. Specific triggers for a permit include:
- Plumbing and Drainage: Moving the drain location (often to the center for proper sloping) or installing new supply lines and mixing valves requires a permit to ensure compliance with the Colorado State Plumbing Code.
- Structural Changes: Altering walls or modifying the floor slope, which is especially critical for a curbless shower installation, requires regulatory oversight.
- Inspections: The permitting process includes a rough-in inspection of the new plumbing before walls are closed and a final inspection once fixtures are installed to confirm the work meets safety standards.
Working with a licensed design-build contractor like ACN Construction can simplify this process, as they manage the permit applications, inspections, and trade coordination to avoid delays and ensure the project meets building codes.
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