In all Residence Districts, except R1 and R2 Districts, a fire station may be enlarged or extended, provided that:
(a) such enlarged or extended portion does not occupy more than 25 percent of the floor area or space which such non-conforming use occupied or utilized within the building or other structure at the time when it became non-conforming;
(b) such enlargement or extension shall not create a non-compliance or increase the degree of non-compliance; and
(c) such enlarged or extended portion conforms to the applicable district regulations on accessory off-street parking spaces as set forth in Section 52-41 (General Provisions).
Community facility bulk regulations as set forth in Article II, Chapter 4, shall apply to such enlarged or extended fire stations.