Residential Districts Schedule of Regulations
	R-1	R-2	R-3c	R-4
Maximum Height
Building height (feet)	25	35	45	60
Lot Size (minimum unless otherwise noted)
Area (square feet)	4,000	4,000	4,000	4,000
Lot width (feet)	40	35	33	70
Maximum Lot Coverage
Buildings	35%	35%	70%	50%
Minimum open space	40	40	-	-
Maximum Density
Units per acre	12	15	35	80
Setbacks (minimum unless otherwise noted)
Front (feet)	25a	25a	Max 10a	25
Side (least) (feet) d	5	5	5	20
Side (total) (feet) d	10	10	10	40
Rear (feet)	35b	35b	20	20

Notes:

1. Where 50 percent or more of the frontage on the same block has been previously built upon, the front setback shall be plus or minus three feet from a line established by using the average depth of the front yards of the five adjacent lots in either direction within the same zoning district eliminating the greatest and least distances measured from the front edge of the house, attached garage or enclosed front porch.
2. The required rear setback for any lot of record less than 100 feet in depth may be reduced by the number of feet in difference between the depth of the lot and 100 feet.
3. Required minimum lot area, lot width and other regulations for single and two-family dwellings shall be the same in the R-3 districts as they are in the R-2 district.
4. On corner lots, there shall be a side setback for all buildings, structures and accessory buildings whenever there are any lots fronting on either side of the side street. The setback shall be equivalent to the required front setback of the side street or the average setback as determined in footnote a. above. In cases where residential lots are back-to-back, the side setback for principal buildings abutting a side street shall be a minimum of six feet.
5. A three-foot minimum side-yard setback for a second-floor addition over an existing non-conforming structure shall be permitted, if construction is fire-resistance rated according to the current Michigan Residential Code.

(Ord. No. 1087, § 3.03, 3-8-10)