§ 106-18. Maximum impervious surface ratios (ISR).

For the purpose of this subsection, impervious surface and impervious surface ratio are defined in section 106-2. The maximum ISR's listed in this Code for various zoning districts shall be the maximum allowed and shall be supported by the necessary drainage calculations, at the sole discretion of the city engineer or designee.

Maximum ISR's: All parcels or lots that have been designated for

Zoning District	Maximum ISR
R-1A	50%
R-1	50%
R-1B	50%
R-2	50%
R-3	75%
R-4	50%
R-5	50%
R-NC	50% for Residential use; 70% for Commercial use
RNC-2	65% for single family detached residential uses or 80% for townhouses, multi-family or commercial uses
C-1	100%
C-2	70%
C-3	70%
C-4	70%
I-1	80%
I-2	80%
PID, PCD, and PUD	The impervious surface for each lot or parcel in a PID, PCD, or a PUD is restricted to the overall maximum ISR that the PID, PCD, or PUD is designed and permitted for by St. Johns River Water Management District (SJRWMD), but in no case shall it exceed 65 percent for single-family detached residential uses or 80 percent for townhouses, multi-family, commercial or industrial uses. The ISR's listed above are the maximum allowed and shall be supported by the necessary drainage calculations.

 

The building permit applicant shall provide to the building department the certified impervious surface ratio for the proposed lot or parcel as prepared by a Florida Registered Professional Engineer or Surveyor and Mapper.

(Ord. No. 05-61, § 4, 12-8-05; Ord. No. 06-38, § 1, 8-24-06)