RS-12 Single-Family Residential Zoning District Overview

The RS-12 Single-Family Residential District is designed for low-density residential development with a minimum lot size of 12,000 square feet. This district allows for detached single-family dwellings as a primary permitted use, subject to specific development standards including height limits, setbacks, and lot coverage maximums.

Purpose and Applicability

The RS-12 Single-Family Residential District is part of the city of Concord's residential zoning classifications. It is intended for areas appropriate for single-family residential uses in neighborhoods at densities ranging from two and one-half to 10 units per net acre [Section 18.30.010]. The RS-12 designation specifically identifies a single-family residential district where the minimum lot size is 12,000 square feet [Section 18.15.020].

Allowed Uses and Permit Requirements

Single-family detached dwellings are a permitted use in the RS-12 district, requiring a zoning clearance (ZC) [Section 18.30.020]. Other uses, such as bed and breakfast inns, require a use permit (UP) [Section 18.30.020].

Land Use	Permit Required
Single-Family, Detached	ZC
Bed and Breakfast Inn	UP
Residential Care Facility, Small	ZC
Residential Care Facility, Large	UP
Home-Based Business	ZC, AP

Development Standards

Development in the RS-12 district must comply with the following standards established for RR and RS districts [Section 18.30.030].

Standard	RS-12 Requirement
Density (minimum/maximum)	0 – 10 du/net acre
Minimum Lot Area (sq. ft.)	12,000
Minimum Lot Width (ft.)	100
Minimum Lot Depth (ft.)	85
Maximum Lot Coverage (percent)	25%
Maximum Building Height (ft.)	30

Minimum Setback Requirements (Single-Family)

Setbacks in the RS-12 district are measured from the property line or back of sidewalk (whichever is less) to the face of the building or structure [Section 18.30.030; Table 18.30.030].

Setback Type	RS-12 Requirement (feet)
Front	20
Interior Side	10 min
Aggregate Side	20
Corner Side	15
Rear	25

Key Restrictions and Additional Requirements

Lot Coverage: Lot coverage is restricted to 25 percent for single-family structures in the RS-12 district [Section 18.30.030].
Height Limits: Structures are limited to a maximum height of 30 feet. Certain exceptions, such as chimneys, may exceed this height by three feet [Section 18.150.070].
Setback Averaging: In areas where existing development has front setbacks less than the 20-foot requirement, the minimum front yard setback may be reduced to the average depth of the two developed lots on either side, or the average of existing front yard depths on the block if 40 percent of the frontage is improved [Section 18.150.140].
Parking: New homes in the RS-12 district with four bedrooms or less require at least two enclosed garage spaces; homes with five to six bedrooms require three spaces; and homes with more than six bedrooms require four spaces [Section 18.160.040].

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