Union City · Zoning · CPA
Union City CPA zoning: height, setbacks and lot size
In Union City's CPA zone, buildings can be up to 100 ft tall, the side setback limit is None required and the rear setback limit is None required (Union City code, read October 2026).
Key points
- Maximum building height: 100 ft
- Minimum side setback: None required (except 20 ft where the side line adjoins a residential district; 1 ft added per 3 ft of height over 12 ft)
- Minimum rear setback: None required (except 20 ft where the rear line adjoins an A or R district; 1 ft added per 3 ft of height over 12 ft)
- Maximum lot coverage: 50%
CPA is a zoning district in Union City. Every value below was read from the Union City 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 CPA
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 | 100 ft § 18.36.120 · code textTable row “Height limit (in feet)”, column “CPA”: 100 |
|---|---|
| Minimum side setback | None required Applies: except 20 ft where the side line adjoins a residential district; 1 ft added per 3 ft of height over 12 ft § 18.36.100 · code textNo side yards shall be required, subject to the following exceptions: |
| Minimum rear setback | None required Applies: except 20 ft where the rear line adjoins an A or R district; 1 ft added per 3 ft of height over 12 ft § 18.36.110 · code textNo rear yard shall be required, subject to the following exceptions: |
| Maximum lot coverage | 50% § 18.36.080 · code textThe amount of the site area covered by structures shall not be restricted subject to the exception that in the CPA district the maximum site area covered by structures shall be 50%. |
Uses in CPA
Uses the code's use tables allow in CPA, or allow with a permit. Each links to its page with the code section.
- Child care center — Needs an administrative use permit (zoning administrator approval, chapter 18.54)
Not on this page
We did not find a general stories, front setback, lot size, FAR, density limit for CPA in the zoning tables we read. The code may still set one elsewhere — check the Union City Municipal Code.
Other Union City zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Union City's CPA zone?
100 ft — Union City Municipal Code § 18.36.120.
What is the minimum side setback in Union City's CPA zone?
None required (except 20 ft where the side line adjoins a residential district; 1 ft added per 3 ft of height over 12 ft) — Union City Municipal Code § 18.36.100.
What is the minimum rear setback in Union City's CPA zone?
None required (except 20 ft where the rear line adjoins an A or R district; 1 ft added per 3 ft of height over 12 ft) — Union City Municipal Code § 18.36.110.
What is the maximum lot coverage in Union City's CPA zone?
50% — Union City Municipal Code § 18.36.080.
General information, not legal advice.
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