§ 150.400 EXEMPTIONS.
   The following are exempt from the requirement of a building permit pursuant to this §§ 150.395 through 150.427 and §§ 150.440 through 150.446 (but must comply with all other applicable requirements of this Code):
   (A)   One-story detached accessory structures not greater than 120 square feet measured along exterior walls that are intended and used for storage and similar uses;
   (B)   Fences not over seven feet high that do not obstruct the flow of stormwater;
   (C)   Retaining walls not located in the critical or transitional water quality zones, which are not over four feet in height measured from the bottom of the footing to the top of the wall and are not greater than 75% of a single side of a single lot or separate tract in length and do not obstruct or alter the flow of stormwater;
   (D)   Rainwater harvesting systems whose sole purpose is for the collection, treatment, and/or storage of rainwater for on-site use that have the following features: No tank exceeds 5,000 gallon capacity; no tank is pressurized; and the area of all tanks collectively does not exceed 350 square feet;
   (E)   Painting, papering, tiling, carpeting, installation of cabinets, counter tops, similar finish work, and minor repairs to existing structures;
   (F)   Swings and other playground equipment that are not located within any easements or within a vegetative buffer and do not substantially obstruct the flow of water;
   (G)   Prefabricated swimming pools that are unheated and are less than 24 inches deep;
   (H)   Decks not exceeding 200 square feet in area, that are no more than 24 inches above grade at any point, are not attached to a dwelling and do not serve an exit door, are in compliance with setback requirements for structures and are not located in any easements;
   (I)   Roof repair or replacement made with the same or similar materials to be repaired or replaced.