RS-10 Single-Family Residential District Overview

The RS-10 district in the City of Concord is a single-family residential zoning classification that permits a minimum lot size of 10,000 square feet and a density of 2.5 to 10 dwelling units per net acre. Permitted structures must comply with specific setback, height, and lot coverage standards established to preserve the low-density residential character of Concord neighborhoods.

Purpose and Applicability

The RS – Residential Single-Family district is applied to areas appropriate for single-family residential uses within the City of Concord [Section 18.30.010]. The "RS-10" designation identifies a specific district where the minimum lot size is 10,000 square feet [Section 18.15.020]. This district is consistent with the City of Concord Low Density Residential (LDR) land use designation [Section 18.30.010].

Allowed Land Uses

Land uses within the RS-10 district are regulated by permit requirements. Some uses are allowed by right with a zoning clearance (ZC), while others require an administrative permit (AP), minor use permit (MP), or use permit (UP) [Section 18.30.020].

Land Use Classification	Permit Required (RS District)
Single-Family, Detached	ZC
Single-Family, Detached – Small Lot Subdivision	UP
Single-Family, Attached	UP
Duplex	Not Allowed
Multifamily	Not Allowed
Family Day Care Home (14 or fewer children)	ZC
Residential Care Facility, Small	ZC
Residential Care Facility, Large	UP
Residential Facility for Seniors, Assisted Living	UP
Supportive Housing	ZC, UP(1)
Transitional Housing, Single-Family	ZC
Home-Based Business	ZC, AP

(1) See Section 18.30.020 footnotes regarding specific conditions for Supportive Housing.

Development Standards

Development in the RS-10 district must comply with specific standards regarding density, lot dimensions, and building scale [Section 18.30.030].

Standard	Requirement for RS-10
Density (minimum/maximum)	0 – 10 dwelling units/net acre
Minimum Lot Area (square feet)	10,000
Minimum Lot Width (feet)	100
Minimum Lot Depth (feet)	85
Maximum Lot Coverage (percent)	30%
Maximum Building Height (feet)	30

Setback Requirements

Minimum setback requirements for single-family residences in the RS-10 district are as follows [Section 18.30.030]:

Setback Location	Minimum Distance (feet)
Front	20
Interior Side	10
Aggregate Side	15
Corner Side	15
Rear	25

Note: Measurements are taken from the property line or back of sidewalk (whichever is less) to the face of the building or structure [Section 18.30.030].

Key Regulations and Standards

Objective Design Standards: New residential development projects must comply with the objective design standards established in Chapter 18.152 [Section 18.152.010].
Parking: Each single-family home must provide at least two parking spaces, with at least one space covered. Parking is prohibited within the required front yard setback, except as provided in Section 18.160.050 [Section 18.160.040].
Accessory Structures: Accessory structures must be subordinate to the primary residence and must comply with setback and height requirements. Accessory structures in the RS-10 district are limited to a maximum floor area of 800 square feet in rear yards [Section 18.200.030].
Fences and Walls: Fences and walls in the RS-10 district are generally limited to three feet in the front setback and six feet otherwise, subject to specific exceptions for rear and side yards [Section 18.150.040].

Sections Cited