A deck under thirty (30) inches above existing or finished grade, whichever is lower, may encroach into any required setback. A deck greater than 30 inches above grade must maintain a minimum 20' setback from any street frontage and a minimum 5' side and rear yard setback. A deck that is greater than 6' above greater and more than 200 square-feet in size will require an Elevated Deck Permit .
A deck does not require a building permit if it meets all of the following criteria: Decks pertinent to R3 and U occupancies not exceeding 200 square feet in area, that are not more than 30” above grade at any point, are not attached to a dwelling, and do not serve the exit door required by code. See the Construction Work Not Requiring A Building Permit list for more information.