Homeowners may apply for a permit if they plan to do the work themselves on the structure they presently reside in. If you are hiring a contractor, the contractor is required to have a State Building Contractors license and pull all required permits. The Homeowner or Contractor completing the work is responsible for obtaining all required permits. Building Permits are required for nearly all structural improvements made to a home or accessory buildings. Additions, decks, porches, roofing, siding and windows require building permits. Mechanical Permits are required for heating and ventilation system work. Electrical Permits are required for all electrical wiring. Plumbing Permits are required for all changes to plumbing. If you are unsure if a project requires a permit, you may contact the Building Inspection Department at (763) 767-6476.