Mendocino County · Zoning · MRR-1
Mendocino County MRR-1 zoning: height, setbacks and lot size
In Mendocino County's MRR-1 zone, buildings can be up to 28 ft tall, the front setback is 20 ft and the minimum lot size is 40,000 sq ft (Mendocino County code, read October 2026).
Key points
- Maximum building height: 28 ft
- Minimum front setback: 20 ft
- Minimum side setback: 6 ft
- Minimum rear setback: 20 ft
- Minimum lot size: 40,000 sq ft
- Maximum lot coverage: 20% (Parcels less than 2 acres in size.)
- Maximum density: 1 primary dwelling unit and 1 second residential dwelling unit per 40,000 sq ft
MRR-1 (Mendocino Rural Residential 1) is a zoning district in Mendocino County. Every value below was read from the Mendocino County 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 MRR-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 | 28 ft § 20.644.040 · code textStructures shall be limited to a maximum height of twenty-eight (28) feet above natural grade. |
|---|---|
| Minimum front setback | 20 ft § 20.644.030 · code textTwenty (20) feet each. |
| Minimum side setback | 6 ft § 20.644.035 · code textSix (6) feet. |
| Minimum rear setback | 20 ft § 20.644.030 · code textTwenty (20) feet each. |
| Minimum lot size | 40,000 sq ft § 20.644.020 · code text(A) MRR-1: Forty thousand (40,000) square feet. |
| Maximum lot coverage | 20% Applies: Parcels less than 2 acres in size. § 20.644.050 · code textTwenty (20) percent for parcels less than two (2) acres in size. |
| Maximum density | 1 primary dwelling unit and 1 second residential dwelling unit per 40,000 sq ft § 20.644.025 · code text(A) MRR-1: One (1) primary dwelling unit, and one (1) second residential dwelling unit per forty thousand (40,000) square feet, except as provided pursuant to Section 20.704.015 (Accessory Uses), Section 20.708.030 (Use of Trailer Coach) and Section 20.708.035 (Family Care Unit). |
When a different number applies
The code sets other values for particular lots, buildings or locations in MRR-1:
- Maximum lot coverage: 15% — Parcels from 2 acres to 5 acres in size. § 20.644.050
- Maximum lot coverage: 10% — Parcels over 5 acres in size. § 20.644.050
Not on this page
We did not find a general stories, FAR limit for MRR-1 in the zoning tables we read. The code may still set one elsewhere — check the Mendocino County Municipal Code.
Other Mendocino County zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Mendocino County's MRR-1 zone?
28 ft — Mendocino County Municipal Code § 20.644.040.
What is the minimum front setback in Mendocino County's MRR-1 zone?
20 ft — Mendocino County Municipal Code § 20.644.030.
What is the minimum side setback in Mendocino County's MRR-1 zone?
6 ft — Mendocino County Municipal Code § 20.644.035.
What is the minimum rear setback in Mendocino County's MRR-1 zone?
20 ft — Mendocino County Municipal Code § 20.644.030.
What is the minimum lot size in Mendocino County's MRR-1 zone?
40,000 sq ft — Mendocino County Municipal Code § 20.644.020.
General information, not legal advice.
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