St Helena · Zoning · OS
St Helena OS zoning: height, setbacks and lot size
In St Helena's OS zone, buildings can be up to 30 ft tall and the front setback is 35 ft (St Helena code, read October 2026).
Key points
- Maximum building height: 30 ft
- Minimum front setback: 35 ft
- Minimum side setback: 10 ft
- Minimum rear setback: 40 ft
- Maximum lot coverage: 10% or 20,000 sq ft, whichever is less
- Maximum floor area ratio (FAR): None
OS is a zoning district in St Helena. Every value below was read from the St Helena 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 OS
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 | 30 ft § 17.20.030 · code textTable row “**Max. Building Height**”, column “**OS**”: 30 ft |
|---|---|
| Minimum front setback | 35 ft § 17.20.030 · code textTable row “**Front Setback**”, column “**OS**”: 35 ft |
| Minimum side setback | 10 ft § 17.20.030 · code textTable row “**Min. Interior Side Setback**”, column “**OS**”: 10 ft |
| Minimum rear setback | 40 ft § 17.20.030 · code textTable row “**Min. Rear Setback**”, column “**OS**”: 40 ft |
| Maximum lot coverage | 10% or 20,000 sq ft, whichever is less § 17.20.030 · code textTable row “**Max. Lot Coverage**”, column “**OS**”: 10% or<br>20,000 sq ft,<br>whichever<br>is less |
| Maximum floor area ratio (FAR) | None § 17.20.030 · code textTable row “**Floor Area Ratio**”, column “**OS**”: None |
Not on this page
We did not find a general stories, lot size, density limit for OS in the zoning tables we read. The code may still set one elsewhere — check the St Helena Municipal Code.
Other St Helena zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in St Helena's OS zone?
30 ft — St Helena Municipal Code § 17.20.030.
What is the minimum front setback in St Helena's OS zone?
35 ft — St Helena Municipal Code § 17.20.030.
What is the minimum side setback in St Helena's OS zone?
10 ft — St Helena Municipal Code § 17.20.030.
What is the minimum rear setback in St Helena's OS zone?
40 ft — St Helena Municipal Code § 17.20.030.
What is the maximum lot coverage in St Helena's OS zone?
10% or 20,000 sq ft, whichever is less — St Helena Municipal Code § 17.20.030.
General information, not legal advice.
Ask about a St Helena property in OS
Ask GoCodebook what you can build at a specific address and get an answer that cites the section.
Ask your question