Single-family dwellings existing as of January 1, 2014, shall be considered a permitted use and may be modified in accordance with all applicable development standards.

Fifty percent; or

Sixty percent if parking is within the principal building.

Maximum height in the RM zone is 25 feet; provided, that the height may be built to 30 feet with a pitched roof if the lowest part of the pitch begins no higher than 25 feet.

The maximum height for accessory structures is 15 feet. On lots one-half acre or larger in size, the height may be increased up to the height of the principal building; provided, that there shall be one foot of additional yard setback for each added foot of additional height above 15 feet.

Street: 20 feet;

Side yard: five feet on each side except that for multifamily development the side yards shall be 10 feet on each side;

Rear yard: 25 feet;

Where a lot abuts a public or private alley, the setback for a principal building shall be 25 feet from the centerline of the alley; for accessory structures, exclusive of accessory dwelling units, the setback shall be 10 feet from the center of the alleyway; for accessory dwelling units, the setback shall be not less than five feet from the rear property line; and in no case shall a structure be erected closer than two feet to the alley right-of-way;

Certain parts of the structure or building including, without limitation, cornices, canopies, sun shades, chimneys and flues shall be considered in calculating the location of the structure or building in determining compliance with the setback requirements of this section (see also Section 18.22.030 for further reference).

Lots 10,000 square feet or less: 40 percent;

Lots 10,000 to 43,560 square feet (one acre): 40 percent for the first 10,000 square feet and 30 percent for all area over 10,000 square feet;

Lots over one acre: 25 percent.