In an R-4 zone uses permitted outright in the R-3 zone and their accessory uses are permitted outright, subject to the applicable provisions of Chapters 16.72, 16.76, 16.80 and 16.96 of this title.

In an R-4 zone, the following uses and their accessory uses may be conditionally permitted, subject to the applicable provisions of Chapters 16.72, 16.76, 16.80, 16.84 and 16.96 of this title:

1. A use permitted as a conditional use in the R-3 zone;
2. Hotel, motel or resort with accessory commercial uses provided that:
   1. They are located within the main building;
   2. They are limited to gift shops, eating and drinking establishments and similar facilities; and
   3. They do not exceed ten (10) percent of the total floor area of the main use.
3. Private museum, art gallery or similar facility;
4. Vacation or travel trailer park;

In addition to standards required in Chapters 16.72, 16.76, 16.80, 16.84 and 16.96 of this title, in the R-4 zone the following standards shall apply:

1. Lot Size and Dimensions. In the R-4 zone the following shall apply:
   1. Minimum lot area:
      1. The minimum lot area for a one- or two-family dwelling shall be 5,000 square feet for a lot served by both public water and public sewer.
      2. For multi-family dwellings, a lot must exceed five thousand (5000) square feet. Multi-family units shall then be allowed at a density of one unit per each additional one thousand two hundred fifty (1250) square feet for a lot served by both public water and public sewer.
      3. For a lot served by only public water, minimum lot size shall be fifteen thousand (15,000) square feet per dwelling unit.
      4. Motels, hotels or resorts in a R-4 zone shall have a minimum lot area per guest unit of one thousand five hundred (1,500) square feet if at the time application is made, the property is served by both a public or community water supply system and sewage disposal system; two thousand five hundred (2,500) square feet if the property is served by a public or community sewage disposal system; and twelve thousand (12,000) square feet if the property is not served by a public or community water supply system.
   2. The minimum lot width shall be fifty (50) feet for an interior lot and fifty-five (55) feet for a corner lot.
   3. The minimum lot depth shall be eighty (80) feet.
   4. Lot area, for ocean and bay front lots or lots with intervening ownership which does not prevent coastal erosion from progressive deterioration of the property shall be determined by the amount of area from the landward boundary of the riparian vegetation zone to the landward extent of the property.
   5. Flag lots require a minimum of twenty-five (25) feet of frontage.
2. Yards. The minimum yard requirements applicable in the R-1 zone shall apply in the R-4 zone except that the front yard shall be a minimum of ten (10) feet.
3. Building Height. No building in the R-4 zone shall exceed a height of thirty- five (35) feet.
4. Lot Coverage. Buildings shall not occupy more than fifty (50) percent of the total area.
5. Drainage: The drainage requirements applicable in the R-1 zone shall apply in the R-4 zone.