Ione · Zoning · R-4
Ione R-4 zoning: height, setbacks and lot size
In Ione's R-4 zone, generally buildings can be up to 45 ft (3 stories) tall, the front setback is 20 ft and the minimum lot size is 6,000 sf, with the conditions listed below (Ione code, read October 2026).
Key points
- Maximum building height: 45 ft
- Maximum number of stories: 3 stories
- Minimum front setback: 20 ft
- Minimum side setback: 10 ft
- Minimum rear setback: 20 ft
- Minimum lot size: 6,000 sf (More than one unit per parcel)
- Maximum density: 25.0 du/acre
R-4 is a zoning district in Ione. Every value below was read from the Ione 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 R-4
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 § 17.22.040 · code textTable row “Height (maximum)”, column “R-4”: 45 ft./3 stories |
|---|---|
| Maximum number of stories | 3 stories § 17.22.040 · code textTable row “Height (maximum)”, column “R-4”: 45 ft./3 stories |
| Minimum front setback | 20 ft § 17.22.040 · code textTable row “Front”, column “R-4”: 20 ft. |
| Minimum side setback | 10 ft § 17.22.040 · code textTable row “Side”, column “R-4”: 10 ft. |
| Minimum rear setback | 20 ft § 17.22.040 · code textTable row “Rear”, column “R-4”: 20 ft. |
| Minimum lot size | 6,000 sf Applies: More than one unit per parcel § 17.22.040 · code textTable row “Minimum Lot Size”, column “R-4”: More than one unit per parcel: 6,000 sf One unit per parcel (condominium, townhome, etc.): 1,570 sf |
| Maximum density | 25.0 du/acre § 17.22.040 · code textTable row “Maximum Density”, column “R-4”: 25.0 du/acre |
Uses in R-4
Uses the code's use tables allow in R-4, or allow with a permit. Each links to its page with the code section.
- Duplex — Needs a site plan review (administrative or discretionary, per section 17.10.030)
- Child care center — Allowed
- Community garden — Allowed
- Emergency shelter — Needs a conditional use permit — see note
When a different number applies
The code sets other values for particular lots, buildings or locations in R-4:
- Minimum lot size: 1,570 sf — One unit per parcel (condominium, townhome, etc.) § 17.22.040
Not on this page
We did not find a general lot coverage, FAR limit for R-4 in the zoning tables we read. The code may still set one elsewhere — check the Ione Municipal Code.
Other Ione zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Ione's R-4 zone?
45 ft — Ione Municipal Code § 17.22.040.
What is the maximum number of stories in Ione's R-4 zone?
3 stories — Ione Municipal Code § 17.22.040.
What is the minimum front setback in Ione's R-4 zone?
20 ft — Ione Municipal Code § 17.22.040.
What is the minimum side setback in Ione's R-4 zone?
10 ft — Ione Municipal Code § 17.22.040.
What is the minimum rear setback in Ione's R-4 zone?
20 ft — Ione Municipal Code § 17.22.040.
General information, not legal advice.
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