Landscaping and Open Space Requirements in the RR-20 Rural Residential District
The RR-20 Rural Residential District in the City of Concord allows for rural single-family residential development at a density of up to 2.5 units per net acre. Landscaping and open space requirements for the RR-20 district generally emphasize compliance with general development standards, including specific lot coverage maximums of 20 percent for single-family residences.
RR-20 District Overview
The RR-20 Rural Residential district is designated for rural single-family residential development or clustered development, with a minimum lot size of 20,000 square feet [Section 18.15.020, Table 18.15.020]. The district implements the Rural Residential land use designation of the Concord general plan [Section 18.30.010].
RR-20 Development Standards
The development standards for the RR-20 district, including lot coverage and physical dimensions, are outlined below:
| Standard | RR-20 District |
|---|---|
| Density (minimum/maximum) | 0 – 2.5 du/net acre |
| Minimum Lot Area (Single-Family) | 20,000 sq. ft. |
| Minimum Lot Width (Single-Family) | 100 feet |
| Minimum Lot Depth (Single-Family) | 100 feet |
| Maximum Lot Coverage (Single-Family) | 20 percent |
| Maximum Building Height (Single-Family) | 30 feet |
Data derived from Table 18.30.030.
Landscaping Requirements
In the RR-20 district, landscaping must be provided for all areas subject to development with structures, grading, or the removal of natural vegetation [Section 18.165.040].
- General Requirements: Landscaping must be maintained in a healthy and thriving condition at all times [Section 18.165.080].
- Tree Preservation: For any construction or development requiring a planning permit, the removal or relocation of protected trees requires a tree permit [Section 18.310.020]. A replacement ratio of three replacement trees for every one protected tree removed is required, determined based on the age, condition, and species of the tree [Section 18.310.060].
- Performance Guarantees: When required by the review authority, a security deposit equal to 150 percent of the total value of plant materials, irrigation, and installation costs may be required to guarantee landscape completion [Section 18.165.030].
Open Space Regulations
While the RR-20 district is defined by its rural character, development must adhere to the following open space considerations:
- General Standards: The RR-20 district is subject to the city's general development standards for open space [Section 18.150.010].
- Private and Common Open Space: Residential development of three or more units is subject to private and common open space requirements [Section 18.150.100]. While these requirements generally apply to medium and high-density developments, any project in the RR-20 district should be designed to maintain the open, natural character envisioned for the district [Section 18.30.010].
- Exclusion of Areas: Off-street parking, loading areas, and driveways are not considered required open space areas [Section 18.150.100].
Sections Cited
- Section 18.15.020 (Zoning map and districts)
- Section 18.30.010 (Purpose - Residential Districts)
- Section 18.30.030 (RR and RS districts – Development standards)
- Section 18.150.010 (General Development Standards - Purpose)
- Section 18.150.100 (Open space and recreational facilities for residential development)
- Section 18.165.030 (Landscape plan and irrigation plans)
- Section 18.165.040 (Landscape location requirements)
- Section 18.165.080 (Maintenance of landscape areas)
- Section 18.310.020 (Tree Preservation and Protection - Applicability)
- Section 18.310.060 (Replacement trees)