The Finest Building In The 5 Towns, First Time For Sale. Abundant parking, Just Off Peninsula Blvd. 1800 Rockaway Avenue presents an exceptional opportunity to acquire a well-maintained, 25,300 SF professional office building located in the affluent and supply-constrained market of Hewlett, NY. Currently configured for medical and professional use, the property is ideal for investors seeking in-place income, long-term tenant retention. One suite of 7,250+/-SF is available for buyer/user. Please call for income & expenses.