Multiple residence districts, hereinafter designated as R-4 districts, are established to provide for larger types of multiple dwellings in relatively small areas generally near business uses or in the vicinity of major thoroughfares, together with appropriate community facilities and compatible types of group living quarters.

(Prior gen. code § 8-30.0)

(Ord. No. 2010-71, § 25, 12-21-10)

Residential development within the R-4 districts located within the planning areas of San Lorenzo, Ashland, Cherryland, Fairview, or Castro Valley (areas within the Castro Valley Urbanized Area) shall be subject to the "Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County," as amended. On matters not provided for in the Residential Design Standards and Guidelines for the Unincorporated Communities of West Alameda County, the respective regulations in this zoning ordinance shall apply.

(Ord. No. 2014-39, § 6, 10-7-14, eff. 1-1-15)

The following principal uses are permitted in an R-4 district:

A.

All uses permitted in R-3 districts, pursuant to Section 17.14.020;

B.

Multiple dwelling or dwelling group, provided that on any building site with an area which equals or exceeds five times the area for one dwelling unit, every dwelling unit placed on such building site shall be subject to site development review pursuant to Section 17.54.210; and

C.

Emergency shelter provided in accordance with Section 17.52.1165 (Emergency shelter—Regulations).

(Ord. 2006-33 § 2 (part): Prior gen. code § 8-30.1)

(Ord. No. 2012-58, § 16, 4-10-12)

The following are conditional uses and shall be permitted in an R-4 district only if approved by the planning commission, sitting as a board of zoning adjustments, as provided in Sections 17.54.135 and 17.16.010:

A.

Hospital.

(Ord. 2000-53 § 1 (part))

(Ord. No. 2010-71, § 26, 12-21-10)

In addition to the uses listed for Sections 17.52.480 and 17.52.580, the following are conditional uses in an R-4 district, and shall be permitted only if approved by the board of zoning adjustments as provided in Section 17.54.130:

A.

Community facility;

B.

Parking lot, as regulated in Section 17.08.040C;

C.

Clubhouse;

D.

Medical or residential care facility for seven or more persons as regulated in Section 17.54.133 (Conditional uses—Residential, medical care, transitional and supportive housing facilities);

E.

Boarding house;

F.

Fraternity or sorority house, accredited by an institution of higher learning;

G.

Single room occupancy facility subject to the provisions of Section 17.54.134 (Conditional uses—Single room occupancy (SRO) facilities);

H.

Licensed transitional and supportive housing for seven or more persons per unit as regulated in Section 17.54.133 (Conditional uses—Residential, medical care, transitional and supportive housing facilities);

I.

Mobilehome parks subject to the provisions provided in Sections 17.52.1000 to 17.52.1065; and

J.

Unattended collection box(es) placed in conjunction with an approved community facility as defined in Section 17.04.010.

(Ord. 2006-33 § 2 (part): Ord. 2002-60 § 1 (part); Ord. 2000-53 § 1 (part); prior gen. code § 8-30.2)

(Ord. No. 2012-58, § 17, 4-10-12; Ord. No. 2013-26, § 7, 7-16-13)

Except as otherwise provided in Section 17.16.090, the maximum of dwelling units permitted on any lot in an R-4 district shall be calculated by dividing the area of the building site by one thousand two hundred fifty (1,250), the density limitations of this section, and the exceptions thereto provided in Section 17.16.090, are intended to indicate maximum residential occupancy, when all the regulations of this title are observed. If any other requirement operates to further restrict the number of dwelling units on a building site, such other requirement shall have prior force.

(Prior gen. code § 8-30.3)

Except as otherwise specified in the case of a combining district, every use in an R-4 district shall be on a building site having a median lot width not less than sixty (60) feet and an area not less than six thousand (6,000) square feet. A corner building site shall have a median lot width of not less than seventy (70) feet.

(Prior gen. code § 8-30.4)

Except as otherwise specified in the case of a combining district, the minimum requirements for yards in an R-4 district shall be as follows, subject to the general provisions of Section 17.52.330:

A.

Depth of front yard: not less than twenty (20) feet;

B.

Depth of rear yard: not less than twenty (20) feet, plus three feet for every full ten feet by which the building height exceeds thirty-five (35) feet;

C.

Width of side yard: not less than ten feet plus one foot for each full ten feet by which the median lot width exceeds fifty (50) feet, but in no case shall it be required to be more than thirty (30) feet, or be less than required by Section 17.16.100.

(Prior gen. code § 8-30.5)

No dwelling in an R-4 district shall have a building height in excess of forty-five (45) feet; provided that where the lot coverage does not exceed thirty (30) percent, the building height may exceed forty-five (45) feet but shall not exceed seventy-five (75) feet. For other main buildings, Section 17.52.090 shall control. (Prior gen. code § 8-20.6)

The lot coverage in R-4 districts, calculated as provided in Section 17.52.380, shall not exceed forty (40) percent of the area of the lot. It is also required that there be provided on the lot no less than six hundred (600) square feet of useable open space for each dwelling unit thereon, except as otherwise provided in Section 17.16.090.

(Prior gen. code § 8-30.7)

When the lot coverage is less than required by Section 17.16.080, the required lot area per dwelling unit is reduced as shown in the following table, but only if the amount of useable open space of each dwelling unit on the lot, calculated pursuant to Section 17.52.390, is equal to or greater than that shown in the column of Table 17.16.090 entitled "lot area usable open space."

Table 17.16.090
Density and Coverage Exception

(Prior gen. code § 8-30.8)

(Ord. No. 2010-71, § 27, 12-21-10)

A.

In an R-4 district, no main building shall be distant less than twenty (20) feet from any other main building plus three feet for every ten feet by which either building exceeds thirty-five (35) feet in height.

B.

Where an accessory building or space designed or used for the parking of a motor vehicle occupies any part of the area between two dwellings on the same building site, such occupied space shall not be included in the calculation of the required minimum distance between them.

C.

No parking space shall in any event be situated less than four feet from the wall of any dwelling, except when within the dwelling or within an attached carport or garage.

D.

All the regulations set forth for R-S districts in Section 17.12.120A, B and C shall also apply and control in R-4 districts.

E.

One identification sign is permitted a multiple dwelling or a dwelling group in an R-4 district, but shall not be illuminated, nor have an area in excess of twelve (12) square feet. (See also Section 17.52.470)

(Prior gen. code §§ 8-30.9—8-30.10)