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Lot Size and Dimensional Standards for CMX: Commercial Mixed-Use in Concord

Jurisdiction: ConcordCode Version: February 10, 2026

In the CMX: Commercial Mixed-Use zoning district of Concord, the minimum lot area is 10,000 square feet, with a minimum lot width of 100 feet and a minimum lot depth of 100 feet [Section 18.40.030]. Certain smaller lots may be approved for the CMX: Commercial Mixed-Use district if a use permit is obtained, and reduced dimensions may also be permitted subject to use permit approval [Section 18.40.030].

Dimensional Standards in the CMX District

The following table outlines the foundational development standards for the CMX: Commercial Mixed-Use district as established in the Concord Development Code.

Standard CMX: Commercial Mixed-Use Requirement
Minimum Lot Area 10,000 square feet
Minimum Lot Width 100 feet
Minimum Lot Depth 100 feet

Note: Smaller lot sizes may be approved with a use permit, and reduced lot dimensions may be allowed subject to use permit approval [Section 18.40.030].

Additional Development Regulations for CMX

While the minimum lot dimensions are fixed, the Concord Development Code provides flexibility for specific project types and conditions within the CMX: Commercial Mixed-Use district:

  • Exceptions for Small Lots: For projects where a site is subdivided into multifamily fee simple/condominium units or small residential lots, the standard lot area, width, depth, and setback limits may not apply [Section 18.40.030].
  • Affordable Housing Incentives: Qualifying affordable and mixed-income housing developments in the CMX: Commercial Mixed-Use district may utilize modified standards for lot area and lot dimensions as specified in the development code [Section 18.185.060]. Under these specific provisions, the modified minimum lot size for qualifying projects in the CMX district is 5,000 square feet, and the modified minimum lot width is 50 feet, with a modified minimum lot depth of 80 feet [Section 18.185.060].
  • Residential Transitions: For buildings up to 30 feet in height that are nonresidential, mixed-use, or multifamily residential in the CMX district, there are no interior side or rear setbacks required unless the property abuts an R district or a residential use; in such cases, transitional requirements apply [Section 18.40.030, Section 18.150.180].

Sections Cited

  • Section 18.40.030 (Table 18.40.030 – Office and commercial districts – Development standards)
  • Section 18.150.180 (Transitional requirements)
  • Section 18.185.060 (Affordable housing incentive program)

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Lot Size and Dimensional Standards for CMX: Commercial Mixed-Use in Concord | Concord Zoning Guide