Brea · Zoning · MU-18
Brea MU-18 zoning: height, setbacks and lot size
In Brea's MU-18 zone, generally buildings can be up to 35 ft tall, the front setback is 0 ft and the minimum lot size is 7,000 sq ft, with the conditions listed below (Brea code, read October 2026).
Key points
- Maximum building height: 35 ft
- Minimum front setback: 0 ft
- Minimum side setback: 0 ft
- Minimum rear setback: 0 ft
- Minimum lot size: 7,000 sq ft (Mixed-use and nonresidential projects. This is a development site size, not a minimum for ownership lots.)
- Maximum lot coverage: 65%
- Maximum floor area ratio (FAR): 1.00 (Nonresidential uses)
- Maximum density: 6.1 to 18 du/acre (Residential uses. The code sets a range: at least 6.1, at most 18.)
MU-18 (Mixed-Use 18) is a zoning district in Brea. Every value below was read from the Brea 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 MU-18
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 | 35 ft § 20.258.020 · code textTable row “Maximum structure height”, column “MU-18”: 35 feet |
|---|---|
| Minimum front setback | 0 ft § 20.258.020 · code textTable row “Front”, column “MU-18”: 0 feet |
| Minimum side setback | 0 ft § 20.258.020 · code textTable row “Side, interior”, column “MU-18”: 0 feet |
| Minimum rear setback | 0 ft § 20.258.020 · code textTable row “Rear”, column “MU-18”: 0 feet |
| Minimum lot size | 7,000 sq ft Applies: Mixed-use and nonresidential projects. This is a development site size, not a minimum for ownership lots. See note 1 below the table in the code. § 20.258.020 · code textTable row “Minimum project size (1)”, column “MU-18”: 7,000 square feet Note 1: The standards for minimum project size, parcel width and parcel depth are intended to regulate sites for development purposes only and are not intended to establish minimum dimensions for ownership or leasehold (e.g. condominium) purposes. No parking adjacent to Brea Boulevard or Imperial Highway allowed, except in the upper floors of a parking structure. The standards for accessory structures are |
| Maximum lot coverage | 65% § 20.258.020 · code textTable row “Maximum parcel coverage”, column “MU-18”: 65% |
| Maximum floor area ratio (FAR) | 1.00 Applies: Nonresidential uses § 20.258.020 · code textTable row “Maximum floor area ratio (FAR) for nonresidential uses”, column “MU-18”: 1.00 |
| Maximum density | 6.1 to 18 du/acre Applies: Residential uses. The code sets a range: at least 6.1, at most 18. § 20.258.020 · code textTable row “Minimum/maximum allowable density range for residential uses”, column “MU-18”: 6.1 to 18 du/acre |
When a different number applies
The code sets other values for particular lots, buildings or locations in MU-18:
- Minimum front setback: 10 ft average — Up to 50% of the frontage on Brea Blvd, Birch St, State College Blvd or Imperial Hwy, for parcels of one acre or more. § 20.258.020
- Minimum front setback: 10 ft — Any setback adjacent to R-1 zone § 20.258.020
Not on this page
We did not find a general stories limit for MU-18 in the zoning tables we read. The code may still set one elsewhere — check the Brea Municipal Code.
Other Brea zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Brea's MU-18 zone?
35 ft — Brea Municipal Code § 20.258.020.
What is the minimum front setback in Brea's MU-18 zone?
0 ft — Brea Municipal Code § 20.258.020.
What is the minimum side setback in Brea's MU-18 zone?
0 ft — Brea Municipal Code § 20.258.020.
What is the minimum rear setback in Brea's MU-18 zone?
0 ft — Brea Municipal Code § 20.258.020.
What is the minimum lot size in Brea's MU-18 zone?
7,000 sq ft (mixed-use and nonresidential projects. This is a development site size, not a minimum for ownership lots) — Brea Municipal Code § 20.258.020.
General information, not legal advice.
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