Antioch · Zoning · RTR-20
Antioch RTR-20 zoning: height, setbacks and lot size
In Antioch's RTR-20 zone, buildings can be up to 45 ft tall, the front setback is 15 ft and the minimum lot size is 20,000 sq ft (Antioch code, read October 2026).
Key points
- Maximum building height: 45 ft
- Minimum front setback: 15 ft
- Minimum side setback: 5 ft
- Minimum rear setback: 10 ft
- Minimum lot size: 20,000 sq ft
- Maximum lot coverage: 50%
- Maximum density: 20 units per acre
RTR-20 is a zoning district in Antioch. Every value below was read from the Antioch 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 RTR-20
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 § 9-5.601 · code textTable row “RTR-20”, column “Maximum Height Feet b”: 45 |
|---|---|
| Minimum front setback | 15 ft § 9-5.601 · code textTable row “RTR-20”, column “Front Yard Minimum a, k”: 15 |
| Minimum side setback | 5 ft § 9-5.601 · code textTable row “RTR-20”, column “Minimum Side Yard Required in Feet e”: 5 ft. |
| Minimum rear setback | 10 ft § 9-5.601 · code textTable row “RTR-20”, column “Minimum Rear Yard Required in Feet”: 10 ft. |
| Minimum lot size | 20,000 sq ft § 9-5.601 · code textTable row “RTR-20”, column “Minimum Building Site Sq. Ft.”: 20,000 |
| Maximum lot coverage | 50% § 9-5.601 · code textTable row “RTR-20”, column “Maximum Lot Coverage”: 50% |
| Maximum density | 20 units per acre § 9-5.601 · code textTable row “RTR-20”, column “Maximum Density Allowed Units Per Gross Developable Acre d”: 20 |
Not on this page
We did not find a general stories, FAR limit for RTR-20 in the zoning tables we read. The code may still set one elsewhere — check the Antioch Municipal Code.
Other Antioch zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Antioch's RTR-20 zone?
45 ft — Antioch Municipal Code § 9-5.601.
What is the minimum front setback in Antioch's RTR-20 zone?
15 ft — Antioch Municipal Code § 9-5.601.
What is the minimum side setback in Antioch's RTR-20 zone?
5 ft — Antioch Municipal Code § 9-5.601.
What is the minimum rear setback in Antioch's RTR-20 zone?
10 ft — Antioch Municipal Code § 9-5.601.
What is the minimum lot size in Antioch's RTR-20 zone?
20,000 sq ft — Antioch Municipal Code § 9-5.601.
General information, not legal advice.
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