Walnut · Zoning · M-1
Walnut M-1 zoning: height, setbacks and lot size
In Walnut's M-1 zone, generally buildings can be up to 35 ft (2 stories) tall, the front setback is 10 ft and the minimum lot size is 7,200 sq ft, with the conditions listed below (Walnut code, read October 2026).
Key points
- Maximum building height: 35 ft
- Maximum number of stories: 2 stories
- Minimum front setback: 10 ft (Local streets, no parking in the setback; major or secondary highways need 50 ft, or 30 ft if parking is 50 ft back)
- Minimum lot size: 7,200 sq ft
- Maximum lot coverage: 60%
M-1 (LIGHT MANUFACTURING ZONE) is a zoning district in Walnut. Every value below was read from the Walnut 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 M-1
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 § 6.48.050 · code textNo lot or parcel of land shall have a building or structure in excess of two stories or 35 feet in height, whichever is less. |
|---|---|
| Maximum number of stories | 2 stories § 6.48.050 · code textNo lot or parcel of land shall have a building or structure in excess of two stories or 35 feet in height, whichever is less. |
| Minimum front setback | 10 ft Applies: Local streets, no parking in the setback; major or secondary highways need 50 ft, or 30 ft if parking is 50 ft back § 6.48.060 · code textFifty feet minimum, of which the rear 30 feet may be used for off-street parking; or |
| Minimum lot size | 7,200 sq ft § 6.48.050 · code textEach lot or parcel of land shall have a minimum lot area of not less than 7,200 square feet. |
| Maximum lot coverage | 60% § 6.48.050 · code textNo lot or parcel of land shall have lot coverage by building or structures in excess of 60% of the lot area. |
When a different number applies
The code sets other values for particular lots, buildings or locations in M-1:
- Minimum front setback: 30 ft — Adjacent to major and secondary highways when off-street parking is located a minimum of 50 feet from the front property line § 6.48.060
Not on this page
We did not find a general side setback, rear setback, FAR, density limit for M-1 in the zoning tables we read. The code may still set one elsewhere — check the Walnut Municipal Code.
Other Walnut zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Walnut's M-1 zone?
35 ft — Walnut Municipal Code § 6.48.050.
What is the maximum number of stories in Walnut's M-1 zone?
2 stories — Walnut Municipal Code § 6.48.050.
What is the minimum front setback in Walnut's M-1 zone?
10 ft (local streets, no parking in the setback; major or secondary highways need 50 ft, or 30 ft if parking is 50 ft back) — Walnut Municipal Code § 6.48.060.
What is the minimum lot size in Walnut's M-1 zone?
7,200 sq ft — Walnut Municipal Code § 6.48.050.
What is the maximum lot coverage in Walnut's M-1 zone?
60% — Walnut Municipal Code § 6.48.050.
General information, not legal advice.
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