A. The following shall be considered as permitted encroachments on setbacks and height requirements, except as provided in this chapter, in any yard: posts, off-street open parking spaces, flues, leaders, sills, pilasters, lintels, cornices, eaves, gutters, awnings, open terraces, service station pump islands, open canopies, steps, chimneys, flagpoles, ornamental features, open fire escapes, sidewalks, and all other similar devices incidental and appurtenant to the principal structure except as hereinafter amended.

B. Decks are exempt from setback requirements, except that a deck may not be located closer than 20 feet from the rear property line and are under the Planning Commission's discretion.