Trinity County · Zoning · R-3
Trinity County R-3 zoning: height, setbacks and lot size
In Trinity County's R-3 zone, generally buildings can be up to 25 ft tall and the front setback is 20 ft, with the conditions listed below (Trinity County code, read October 2026).
Key points
- Maximum building height: 25 ft (45 ft if the parcel is in the Weaverville Fire Protection District)
- Minimum front setback: 20 ft
- Minimum side setback: 10 ft (Interior side yard; the exterior side yard is 15 ft)
- Minimum rear setback: 15 ft
- Maximum lot coverage: 40%
R-3 (Multiple Family District) is a zoning district in Trinity County. Every value below was read from the Trinity 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 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 | 25 ft Applies: 45 ft if the parcel is in the Weaverville Fire Protection District § 17.18.060 · code textThe maximum building height shall be twenty-five feet, or forty-five feet if the parcel is located within the Weaverville Fire Protection District. |
|---|---|
| Minimum front setback | 20 ft § 17.18.070 · code textThe front yard setback shall have a minimum depth of twenty feet. |
| Minimum side setback | 10 ft Applies: Interior side yard; the exterior side yard is 15 ft § 17.18.080 · code textThe interior side yard setback shall be a minimum of ten feet. Exterior side yard setback is fifteen feet. |
| Minimum rear setback | 15 ft § 17.18.090 · code textThe rear yard setback shall be a minimum of fifteen feet. |
| Maximum lot coverage | 40% § 17.18.100 · code textThe total lot area covered by structures shall not exceed forty percent of the total area of the lot. |
When a different number applies
The code sets other values for particular lots, buildings or locations in R-3:
- Maximum building height: 45 ft — Parcel located within the Weaverville Fire Protection District § 17.18.060
Not on this page
We did not find a general stories, lot size, FAR, density limit for R-3 in the zoning tables we read. The code may still set one elsewhere — check the Trinity County Municipal Code.
Other Trinity County zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Trinity County's R-3 zone?
25 ft (45 ft if the parcel is in the Weaverville Fire Protection District) — Trinity County Municipal Code § 17.18.060.
What is the minimum front setback in Trinity County's R-3 zone?
20 ft — Trinity County Municipal Code § 17.18.070.
What is the minimum side setback in Trinity County's R-3 zone?
10 ft (interior side yard; the exterior side yard is 15 ft) — Trinity County Municipal Code § 17.18.080.
What is the minimum rear setback in Trinity County's R-3 zone?
15 ft — Trinity County Municipal Code § 17.18.090.
What is the maximum lot coverage in Trinity County's R-3 zone?
40% — Trinity County Municipal Code § 17.18.100.
General information, not legal advice.
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