How long does an HVAC permit take to be approved? Kristine Hanks July 07, 2021 22:43 Updated Depending on the jurisdiction, a permit from the date pulled can take 1-3 weeks to be approved. Related articles What is a HERS test? When does it happen? What’s Included In The HVAC Tune-Up? Why should I call a professional to repair my heating and Air Conditioning Unit? Comments 0 comments Please sign in to leave a comment.