Concord · Zoning · CMX
Concord CMX zoning: height, setbacks and lot size
In Concord's CMX zone, generally buildings can be up to 30 ft tall, the front setback is 5 ft and the minimum lot size is 10,000 sq ft, with the conditions listed below (Concord code, read October 2026).
Key points
- Maximum building height: 30 ft (Nonresidential)
- Minimum front setback: 5 ft
- Minimum side setback: None required (None required unless adjacent to an R district (or to a residential use in CMX))
- Minimum rear setback: None required (None required unless adjacent to an R district (or to a residential use in CMX))
- Minimum lot size: 10,000 sq ft
- Maximum floor area ratio (FAR): 1.0
CMX is a zoning district in Concord. Every value below was read from the Concord Municipal Code and links to its section (read October 2026). State laws such as the ADU and SB 9 rules can allow more on a residential lot. General information, not legal advice — read the code text and check with the city before you build.
Development standards in CMX
The general rule for a typical lot in this zone. Zoning tables often attach notes, such as rules for corner lots, lots next to a residential zone, or new subdivisions only. Open “code text” under a value to see the table cell or sentence it was read from.
| Maximum building height | 30 ft Applies: Nonresidential See note 4 below the table in the code. § 18.40.030 · code textTable row “Nonresidential”, column “CMX (4)”: 30 Note 4: Standard does not apply to small, independent parcels corresponding to individual dwellings within a larger multifamily residential, mixed-use, or townhome development. |
|---|---|
| Minimum front setback | 5 ft See note 4 below the table in the code. § 18.40.030 · code textTable row “Front”, column “CMX (4)”: 5 Note 4: Standard does not apply to small, independent parcels corresponding to individual dwellings within a larger multifamily residential, mixed-use, or townhome development. |
| Minimum side setback | None required Applies: None required unless adjacent to an R district (or to a residential use in CMX) See note 4 below the table in the code. § 18.40.030 · code textTable row “Interior Side, Rear”, column “CMX (4)”: None required unless adjacent to an R district or residential use in CMX. See CDC 18.150.180 (Transitional requirements) for buildings up to 30 feet in height . Note 4: Standard does not apply to small, independent parcels corresponding to individual dwellings within a larger multifamily residential, mixed-use, or townhome development. |
| Minimum rear setback | None required Applies: None required unless adjacent to an R district (or to a residential use in CMX) See note 4 below the table in the code. § 18.40.030 · code textTable row “Interior Side, Rear”, column “CMX (4)”: None required unless adjacent to an R district or residential use in CMX. See CDC 18.150.180 (Transitional requirements) for buildings up to 30 feet in height . Note 4: Standard does not apply to small, independent parcels corresponding to individual dwellings within a larger multifamily residential, mixed-use, or townhome development. |
| Minimum lot size | 10,000 sq ft See note 4 below the table in the code. § 18.40.030 · code textTable row “Lot Area (square feet) minimum”, column “CMX (4)”: 10,000 Note 4: Standard does not apply to small, independent parcels corresponding to individual dwellings within a larger multifamily residential, mixed-use, or townhome development. |
| Maximum floor area ratio (FAR) | 1.0 See note 4 below the table in the code. § 18.40.030 · code textTable row “Floor Area Ratio (FAR) (maximum)”, column “CMX (4)”: 1.0 Note 4: Standard does not apply to small, independent parcels corresponding to individual dwellings within a larger multifamily residential, mixed-use, or townhome development. |
Uses in CMX
Uses the code's use tables allow in CMX, or allow with a permit. Each links to its page with the code section.
- Duplex — Allowed
- Apartment building — Needs an use permit (zoning clearance if the project meets the note) — see note
- Rooming or boarding house — Needs an use permit
- Residential care home (7 or more) — Needs a minor use permit
- Child care center — Needs an use permit
- Church or place of worship — Needs an use permit
- Community garden — Needs an administrative permit
- Growing crops — Allowed
When a different number applies
The code sets other values for particular lots, buildings or locations in CMX:
- Maximum building height: 37 ft — Residential and mixed-use housing development projects § 18.40.030
Not on this page
We did not find a general stories, lot coverage, density limit for CMX in the zoning tables we read. The code may still set one elsewhere — check the Concord Municipal Code.
Other Concord zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Concord's CMX zone?
30 ft (nonresidential) — Concord Municipal Code § 18.40.030.
What is the minimum front setback in Concord's CMX zone?
5 ft — Concord Municipal Code § 18.40.030.
What is the minimum side setback in Concord's CMX zone?
None required (none required unless adjacent to an R district (or to a residential use in CMX)) — Concord Municipal Code § 18.40.030.
What is the minimum rear setback in Concord's CMX zone?
None required (none required unless adjacent to an R district (or to a residential use in CMX)) — Concord Municipal Code § 18.40.030.
What is the minimum lot size in Concord's CMX zone?
10,000 sq ft — Concord Municipal Code § 18.40.030.
General information, not legal advice.
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