What must a homeowner do before installing a new mechanical system?

Before installing a new mechanical system, a homeowner is required to obtain a building permit. This step is crucial because building permits ensure that the installation is compliant with local building codes, safety regulations, and zoning laws. The permit process often involves an inspection phase where local authorities assess the proposed work to confirm that it adheres to all necessary standards, which helps protect the integrity of the building and the safety of its occupants.

While contacting a design professional might be advisable for complex installations to ensure the system is designed correctly and functions efficiently, it is not strictly mandatory in all situations. Completing the installation themselves may seem appealing to those with DIY skills, but without the necessary permits, they could be violating local laws. Notifying the local community is generally not a requirement for mechanical installations unless it pertains to specific zoning issues or neighborhood associations, which also does not universally apply. Therefore, obtaining a building permit is the essential and legally required step for a homeowner when making such modifications.