Mount Shasta · Zoning · R-3
Mount Shasta R-3 zoning: height, setbacks and lot size
In Mount Shasta's R-3 zone, generally buildings can be up to 45 ft tall, the front setback is 20 ft and the minimum lot size is 6,000 sq ft, with the conditions listed below (Mount Shasta code, read October 2026).
Key points
- Maximum building height: 45 ft
- Minimum front setback: 20 ft
- Minimum side setback: Combined side yards 10 ft; minimum one side yard 4 ft
- Minimum rear setback: 10 ft
- Minimum lot size: 6,000 sq ft (nonresidential uses only; residential lot sizes are listed by building type)
- Maximum lot coverage: 65%
- Maximum density: 20 units per gross acre
R-3 is a zoning district in Mount Shasta. Every value below was read from the Mount Shasta 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 R-3
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 | 45 ft § 18.16.020 · code textMaximum building height: 45 feet. |
|---|---|
| Minimum front setback | 20 ft § 18.16.020 · code textFront: 20 feet, 10 feet if alley access for parking. |
| Minimum side setback | Combined side yards 10 ft; minimum one side yard 4 ft § 18.16.020 · code textSide: The combined side yards shall not be less than 10 feet with a minimum side yard on one side of four feet. |
| Minimum rear setback | 10 ft § 18.16.020 · code textRear: 10 feet, five feet for alley-access parking structure. |
| Minimum lot size | 6,000 sq ft Applies: nonresidential uses only; residential lot sizes are listed by building type § 18.16.020 · code textNonresidential: 6,000 square feet. |
| Maximum lot coverage | 65% § 18.16.020 · code textMaximum lot coverage: 65 percent. |
| Maximum density | 20 units per gross acre § 18.16.020 · code textMaximum residential density: 20 units per gross acre. |
When a different number applies
The code sets other values for particular lots, buildings or locations in R-3:
- Minimum front setback: 10 ft — If alley access for parking § 18.16.020
- Minimum side setback: 10 ft — Corner lots: street side § 18.16.020
- Minimum rear setback: 5 ft — For alley-access parking structure § 18.16.020
- Minimum lot size: 4,500 sq ft per unit — Single-family § 18.16.020
- Minimum lot size: 6,000 sq ft per two-unit structure — Duplex § 18.16.020
- Minimum lot size: 8,000 sq ft per three-unit structure — Triplex § 18.16.020
Not on this page
We did not find a general stories, FAR limit for R-3 in the zoning tables we read. The code may still set one elsewhere — check the Mount Shasta Municipal Code.
Other Mount Shasta zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Mount Shasta's R-3 zone?
45 ft — Mount Shasta Municipal Code § 18.16.020.
What is the minimum front setback in Mount Shasta's R-3 zone?
20 ft — Mount Shasta Municipal Code § 18.16.020.
What is the minimum side setback in Mount Shasta's R-3 zone?
Combined side yards 10 ft; minimum one side yard 4 ft — Mount Shasta Municipal Code § 18.16.020.
What is the minimum rear setback in Mount Shasta's R-3 zone?
10 ft — Mount Shasta Municipal Code § 18.16.020.
What is the minimum lot size in Mount Shasta's R-3 zone?
6,000 sq ft (nonresidential uses only; residential lot sizes are listed by building type) — Mount Shasta Municipal Code § 18.16.020.
General information, not legal advice.
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