Eureka · Zoning · R3
Eureka R3 zoning: height, setbacks and lot size
In Eureka's R3 zone, generally buildings can be up to 35 ft tall and the minimum lot size is 2,000 sq. ft., with the conditions listed below (Eureka code, read October 2026).
Key points
- Maximum building height: 35 ft (Primary building.)
- Minimum lot size: 2,000 sq. ft. (Only for new lots created after June 20, 2019. Lots existing on that date have no minimum.)
- Maximum floor area ratio (FAR): 1.25
- Maximum density: 44 du/acre
R3 (Residential High) is a zoning district in Eureka. Every value below was read from the Eureka 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 R3
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 Applies: Primary building. § 155.204.030 · code textTable row “Primary building”, column “Residential High R3”: 35 ft. [3] |
|---|---|
| Minimum lot size | 2,000 sq. ft. Applies: Only for new lots created after June 20, 2019. Lots existing on that date have no minimum. § 155.204.030 · code textTable row “Minimum lot area [1]”, column “Residential High R3”: 2,000 sq. ft. |
| Maximum floor area ratio (FAR) | 1.25 § 155.204.030 · code textTable row “Maximum floor area ratio (FAR) [2]”, column “Residential High R3”: 1.25 |
| Maximum density | 44 du/acre § 155.204.030 · code textTable row “Maximum units per acre”, column “Residential High R3”: 44 du/acre |
Uses in R3
Uses the code's use tables allow in R3, or allow with a permit. Each links to its page with the code section.
- Single-family home — Allowed — see note
- Apartment building — Allowed
- Private school — Needs a conditional use permit
When a different number applies
The code sets other values for particular lots, buildings or locations in R3:
- Maximum lot coverage: 60% — Lots less than 4,000 sq. ft. § 155.204.030
- Maximum lot coverage: 70% — Lots 4,000 - 5,999 sq. ft. § 155.204.030
- Maximum lot coverage: 80% — Lots 6,000 sq. ft. and above. § 155.204.030
Not on this page
We did not find a general stories, front setback, side setback, rear setback, lot coverage limit for R3 in the zoning tables we read. The code may still set one elsewhere — check the Eureka Municipal Code.
Other Eureka zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Eureka's R3 zone?
35 ft (primary building) — Eureka Municipal Code § 155.204.030.
What is the minimum lot size in Eureka's R3 zone?
2,000 sq. ft. (only for new lots created after June 20, 2019. Lots existing on that date have no minimum) — Eureka Municipal Code § 155.204.030.
What is the maximum floor area ratio (far) in Eureka's R3 zone?
1.25 — Eureka Municipal Code § 155.204.030.
What is the maximum density in Eureka's R3 zone?
44 du/acre — Eureka Municipal Code § 155.204.030.
General information, not legal advice.
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