Installation of any device using refrigerant for either comfort cooling or refrigeration of products (e.g., central air conditioners, chillers, heat pumps, walk-in coolers, walk-in freezers, refrigerated cases, etc.) requires a permit. If you have questions, contact the Mechanical Inspection Department at 651-266-9004 (7:30 am to 9:00 am, Monday - Friday), or email the DSI Message Center.
See Chapter 33.04 of the Saint Paul Legislative Code for information about refrigeration work.
Expiration & Renewal
Each permit issued shall expire if the work authorized by the permit is not commenced within 180 days from the date issued, or if the work is suspended or abandoned at any time after the work has begun for a period of 180 days. In addition, exterior work done on a one or two-family dwelling (including garages) must be completed within one year from the date issued. Interior and exterior work done on commercial properties (including hotels and apartment buildings) where the permit valuation is under $500,000 must be completed within one year from the date issued. See Chapter 33.04 of the Saint Paul Legislative Code.