Twentynine Palms · Zoning · OSR-40
Twentynine Palms OSR-40 zoning: height, setbacks and lot size
In Twentynine Palms's OSR-40 zone, buildings can be up to 35 ft tall, the front setback is 32 ft and the minimum lot size is 40 acres (Twentynine Palms code, read October 2026).
Key points
- Maximum building height: 35 ft
- Minimum front setback: 32 ft
- Minimum side setback: 15 ft (First story)
- Minimum rear setback: 25 ft
- Minimum lot size: 40 acres
- Maximum lot coverage: 20%
- Maximum density: 0.025 dwelling units per gross acre (Only applies to the new subdivision of property)
OSR-40 (Open Space Residential Land Use District) is a zoning district in Twentynine Palms. Every value below was read from the Twentynine Palms 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 OSR-40
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 § 19.20.040 · code textTable row “Maximum”, column “OSR-40”: 35 |
|---|---|
| Minimum front setback | 32 ft § 19.20.040 · code textTable row “Front, First Story and Above”, column “OSR-40”: 32 |
| Minimum side setback | 15 ft Applies: First story § 19.20.040 · code textTable row “Side, First Story”, column “OSR-40”: 15 |
| Minimum rear setback | 25 ft § 19.20.040 · code textTable row “Rear, First Story and Above”, column “OSR-40”: 25 |
| Minimum lot size | 40 acres § 19.20.040 · code textTable row “Minimum Lot Size”, column “OSR-40”: 40 acres |
| Maximum lot coverage | 20% § 19.20.040 · code textTable row “Maximum”, column “OSR-40”: 20 |
| Maximum density | 0.025 dwelling units per gross acre Applies: Only applies to the new subdivision of property § 19.20.040 · code textTable row “Maximum 1”, column “OSR-40”: 0.025 |
Uses in OSR-40
Uses the code's use tables allow in OSR-40, or allow with a permit. Each links to its page with the code section.
- Single-family home — Allowed
- Growing crops — Needs a conditional use permit — see note
When a different number applies
The code sets other values for particular lots, buildings or locations in OSR-40:
- Minimum side setback: 20 ft — Second story and above § 19.20.040
Not on this page
We did not find a general stories, FAR limit for OSR-40 in the zoning tables we read. The code may still set one elsewhere — check the Twentynine Palms Municipal Code.
Other Twentynine Palms zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Twentynine Palms's OSR-40 zone?
35 ft — Twentynine Palms Municipal Code § 19.20.040.
What is the minimum front setback in Twentynine Palms's OSR-40 zone?
32 ft — Twentynine Palms Municipal Code § 19.20.040.
What is the minimum side setback in Twentynine Palms's OSR-40 zone?
15 ft (first story) — Twentynine Palms Municipal Code § 19.20.040.
What is the minimum rear setback in Twentynine Palms's OSR-40 zone?
25 ft — Twentynine Palms Municipal Code § 19.20.040.
What is the minimum lot size in Twentynine Palms's OSR-40 zone?
40 acres — Twentynine Palms Municipal Code § 19.20.040.
General information, not legal advice.
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