Walnut Creek · Zoning · B-P-100
Walnut Creek B-P-100 zoning: height, setbacks and lot size
In Walnut Creek's B-P-100 zone, the front setback is 25 feet and the minimum lot size is 100,000 sq. ft. (Walnut Creek code, read October 2026).
Key points
- Minimum front setback: 25 feet
- Minimum side setback: 20 ft (75 ft next to Ygnacio Valley Road or Oak Grove Road; add 1 ft per foot of building height over 20 ft)
- Minimum rear setback: 20 ft (75 ft next to Ygnacio Valley Road or Oak Grove Road; add 1 ft per foot of building height over 20 ft)
- Minimum lot size: 100,000 sq. ft.
- Maximum lot coverage: 50%
- Maximum floor area ratio (FAR): 0.5
B-P-100 (Business Park District) is a zoning district in Walnut Creek. Every value below was read from the Walnut Creek 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 B-P-100
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.
| Minimum front setback | 25 feet § 10-2.2.1203 · code textTable row “a. B-P-100”, column “DEVELOPMENT REGULATIONS”: 25 feet |
|---|---|
| Minimum side setback | 20 ft Applies: 75 ft next to Ygnacio Valley Road or Oak Grove Road; add 1 ft per foot of building height over 20 ft § 10-2.2.1203 · code textThe minimum width of any front, side, corner side, or rear yard adjacent to Ygnacio Valley Road or Oak Grove Road shall be 75 feet. |
| Minimum rear setback | 20 ft Applies: 75 ft next to Ygnacio Valley Road or Oak Grove Road; add 1 ft per foot of building height over 20 ft § 10-2.2.1203 · code textThe minimum width of any front, side, corner side, or rear yard adjacent to Ygnacio Valley Road or Oak Grove Road shall be 75 feet. |
| Minimum lot size | 100,000 sq. ft. § 10-2.2.1203 · code textTable row “1. B-P-100”, column “DEVELOPMENT REGULATIONS”: 100,000 sq. ft. |
| Maximum lot coverage | 50% § 10-2.2.1203 · code textTable row “1. B-P-100”, column “DEVELOPMENT REGULATIONS”: 50% |
| Maximum floor area ratio (FAR) | 0.5 § 10-2.2.1203 · code textTable row “1. B-P-100”, column “DEVELOPMENT REGULATIONS”: .5 FAR |
When a different number applies
The code sets other values for particular lots, buildings or locations in B-P-100:
- Minimum front setback: 75 feet — Any front yard adjacent to Ygnacio Valley Road or Oak Grove Road § 10-2.2.1203
Not on this page
We did not find a general height, stories, density limit for B-P-100 in the zoning tables we read. The code may still set one elsewhere — check the Walnut Creek Municipal Code.
Other Walnut Creek zoning districts
Who this affects
Frequently asked questions
What is the minimum front setback in Walnut Creek's B-P-100 zone?
25 feet — Walnut Creek Municipal Code § 10-2.2.1203.
What is the minimum side setback in Walnut Creek's B-P-100 zone?
20 ft (75 ft next to Ygnacio Valley Road or Oak Grove Road; add 1 ft per foot of building height over 20 ft) — Walnut Creek Municipal Code § 10-2.2.1203.
What is the minimum rear setback in Walnut Creek's B-P-100 zone?
20 ft (75 ft next to Ygnacio Valley Road or Oak Grove Road; add 1 ft per foot of building height over 20 ft) — Walnut Creek Municipal Code § 10-2.2.1203.
What is the minimum lot size in Walnut Creek's B-P-100 zone?
100,000 sq. ft. — Walnut Creek Municipal Code § 10-2.2.1203.
What is the maximum lot coverage in Walnut Creek's B-P-100 zone?
50% — Walnut Creek Municipal Code § 10-2.2.1203.
General information, not legal advice.
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