Sonoma County · Zoning · K
Sonoma County K zoning: height, setbacks and lot size
In Sonoma County's K zone, generally buildings can be up to 35 ft. tall and the minimum lot size is 8,000 sq. ft., with the conditions listed below (Sonoma County code, read October 2026).
Key points
- Maximum building height: 35 ft.
- Minimum side setback: 5 ft (Interior side line; 10 ft where access to an interior court is by a side yard or a building entrance faces the side line)
- Minimum rear setback: 10 ft.
- Minimum lot size: 8,000 sq. ft. (Lots with public sewer service or with both public sewer and public water service)
- Maximum lot coverage: 50%
K is a zoning district in Sonoma County. Every value below was read from the Sonoma 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 K
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. § 26-10-040 · code textTable row “Height (max. ft.)”, column “K Zone”: 35 ft. |
|---|---|
| Minimum side setback | 5 ft Applies: Interior side line; 10 ft where access to an interior court is by a side yard or a building entrance faces the side line § 26-10-040 · code textd. Interior side property line: five feet (5'); ten feet (10') on lots where access is gained to an interior court by way of a side yard, or where an entrance to a building faces the side line |
| Minimum rear setback | 10 ft. § 26-10-040 · code texte. Rear property line: ten feet (10'). |
| Minimum lot size | 8,000 sq. ft. Applies: Lots with public sewer service or with both public sewer and public water service § 26-10-040 · code textTable row “Lot size for lots with public sewer service or with both public sewer and public water service (min.)”, column “K Zone”: 8,000 sq. ft. |
| Maximum lot coverage | 50% § 26-10-040 · code textTable row “Lot Coverage (max.)”, column “K Zone”: 50% |
Uses in K
Uses the code's use tables allow in K, or allow with a permit. Each links to its page with the code section.
- Single-family home — Needs a conditional use permit
When a different number applies
The code sets other values for particular lots, buildings or locations in K:
- Minimum side setback: 10 ft. — Lots where access is gained to an interior court by way of a side yard, or where an entrance to a building faces the side line § 26-10-040
- Minimum lot size: 1 acre — Lots with public water service and no public sewer service § 26-10-040
- Minimum lot size: 1.5 acres — Lots with no public water service and no public sewer service § 26-10-040
Not on this page
We did not find a general stories, front setback, FAR, density limit for K in the zoning tables we read. The code may still set one elsewhere — check the Sonoma County Municipal Code.
Other Sonoma County zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Sonoma County's K zone?
35 ft. — Sonoma County Municipal Code § 26-10-040.
What is the minimum side setback in Sonoma County's K zone?
5 ft (interior side line; 10 ft where access to an interior court is by a side yard or a building entrance faces the side line) — Sonoma County Municipal Code § 26-10-040.
What is the minimum rear setback in Sonoma County's K zone?
10 ft. — Sonoma County Municipal Code § 26-10-040.
What is the minimum lot size in Sonoma County's K zone?
8,000 sq. ft. (lots with public sewer service or with both public sewer and public water service) — Sonoma County Municipal Code § 26-10-040.
What is the maximum lot coverage in Sonoma County's K zone?
50% — Sonoma County Municipal Code § 26-10-040.
General information, not legal advice.
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