Ventura County · Zoning · RB
Ventura County RB zoning: height, setbacks and lot size
In Ventura County's RB zone, generally buildings can be up to 28 ft tall, the front setback is 10 ft and the minimum lot size is 3,000 sq ft, with the conditions listed below (Ventura County code, read October 2026).
Key points
- Maximum building height: 28 ft (Principal structure; highest point of finished roof)
- Minimum front setback: 10 ft
- Minimum side setback: 3 ft (Interior & Corner Lots, Except Reverse Corner)
- Minimum rear setback: 14 ft (May be reduced to 6 ft if the front setback is 20 ft or more)
- Minimum lot size: 3,000 sq ft (At least 1,500 sq ft of lot area per dwelling unit; at most 2 dwelling units per lot)
RB is a zoning district in Ventura County. Every value below was read from the Ventura 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 RB
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 | 28 ft Applies: Principal structure; highest point of finished roof § 8175-2 · code textTable row “RB”, column “Principal Structure”: 28' |
|---|---|
| Minimum front setback | 10 ft § 8175-2 · code textTable row “RB”, column “Front”: 10' |
| Minimum side setback | 3 ft Applies: Interior & Corner Lots, Except Reverse Corner This is the street-side setback on a corner lot; an interior side setback can differ. § 8175-2 · code textTable row “RB”, column “Interior & Corner Lots, Except Reverse Corner”: 3' |
| Minimum rear setback | 14 ft Applies: May be reduced to 6 ft if the front setback is 20 ft or more § 8175-2 · code textTable row “RB”, column “Rear”: 14' (f) |
| Minimum lot size | 3,000 sq ft Applies: At least 1,500 sq ft of lot area per dwelling unit; at most 2 dwelling units per lot See note a below the table in the code. The code attaches note e to this value. This page does not show it; read the code before relying on the number. § 8175-2 · code textTable row “RB”, column “Minimum Lot Area (a)”: 3,000 Sq. Ft. (e) Note a: See Sections 8175-4.10 through 8175-4.12 for exceptions. |
When a different number applies
The code sets other values for particular lots, buildings or locations in RB:
- Maximum building height: 30 ft — A-frame principal structures § 8175-3.13.2
- Minimum side setback: 5 ft — Reverse Corner Lots: Street Side § 8175-2
Not on this page
We did not find a general stories, lot coverage, FAR, density limit for RB in the zoning tables we read. The code may still set one elsewhere — check the Ventura County Municipal Code.
Other Ventura County zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Ventura County's RB zone?
28 ft (principal structure; highest point of finished roof) — Ventura County Municipal Code § 8175-2.
What is the minimum front setback in Ventura County's RB zone?
10 ft — Ventura County Municipal Code § 8175-2.
What is the minimum side setback in Ventura County's RB zone?
3 ft (interior & Corner Lots, Except Reverse Corner) — Ventura County Municipal Code § 8175-2. The code attaches notes or conditions to this value; read the section before relying on it.
What is the minimum rear setback in Ventura County's RB zone?
14 ft (may be reduced to 6 ft if the front setback is 20 ft or more) — Ventura County Municipal Code § 8175-2.
What is the minimum lot size in Ventura County's RB zone?
3,000 sq ft (at least 1,500 sq ft of lot area per dwelling unit; at most 2 dwelling units per lot) — Ventura County Municipal Code § 8175-2. The code attaches notes or conditions to this value; read the section before relying on it.
General information, not legal advice.
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