Chino Hills · Zoning · RM-3
Chino Hills RM-3 zoning: height, setbacks and lot size
In Chino Hills's RM-3 zone, generally buildings can be up to 42 ft tall, the front setback is 20 ft and the minimum lot size is 20,000 sf project area, with the conditions listed below (Chino Hills code, read October 2026).
Key points
- Maximum building height: 42 ft
- Minimum front setback: 20 ft (Primary structure)
- Minimum side setback: 10 ft (Side yards other than the street side)
- Minimum rear setback: 10 ft (Note d also states a fifteen-foot rear yard; check the code)
- Minimum lot size: 20,000 sf project area (Minimum project area; small lot overlay and Planned Development districts have other standards)
- Maximum lot coverage: 60%
- Maximum density: 35 du/ac
RM-3 is a zoning district in Chino Hills. Every value below was read from the Chino Hills 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 RM-3
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 | 42 ft § 16.10.030 · code textTable row “G. Maximum Building Height (c)”, column “Zoning District: RM-3”: 42 ft. |
|---|---|
| Minimum front setback | 20 ft Applies: Primary structure § 16.10.030 · code textTable row “Primary structure”, column “Zoning District: RM-3”: 20 ft. |
| Minimum side setback | 10 ft Applies: Side yards other than the street side § 16.10.030 · code textTable row “Other Side”, column “Zoning District: RM-3”: 10 ft. |
| Minimum rear setback | 10 ft Applies: Note d also states a fifteen-foot rear yard; check the code § 16.10.030 · code textTable row “J. Minimum Rear Yard Setback (d)”, column “Zoning District: RM-3”: 10 ft. |
| Minimum lot size | 20,000 sf project area Applies: Minimum project area; small lot overlay and Planned Development districts have other standards The code attaches note a to this value. This page does not show it; read the code before relying on the number. § 16.10.030 · code textTable row “A. Minimum Lot Size (Single-Family Detached Residential Development) or Minimum Project Area (a)”, column “Zoning District: RM-3”: 20,000 sf project area |
| Maximum lot coverage | 60% § 16.10.030 · code textTable row “D. Maximum Lot Coverage by: Buildings (g)”, column “Zoning District: RM-3”: 60% |
| Maximum density | 35 du/ac § 16.10.030 · code textTable row “F. Maximum Density”, column “Zoning District: RM-3”: 35 du/ac |
Not on this page
We did not find a general stories, FAR limit for RM-3 in the zoning tables we read. The code may still set one elsewhere — check the Chino Hills Municipal Code.
Other Chino Hills zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Chino Hills's RM-3 zone?
42 ft — Chino Hills Municipal Code § 16.10.030.
What is the minimum front setback in Chino Hills's RM-3 zone?
20 ft (primary structure) — Chino Hills Municipal Code § 16.10.030.
What is the minimum side setback in Chino Hills's RM-3 zone?
10 ft (side yards other than the street side) — Chino Hills Municipal Code § 16.10.030.
What is the minimum rear setback in Chino Hills's RM-3 zone?
10 ft (note d also states a fifteen-foot rear yard; check the code) — Chino Hills Municipal Code § 16.10.030.
What is the minimum lot size in Chino Hills's RM-3 zone?
20,000 sf project area (minimum project area; small lot overlay and Planned Development districts have other standards) — Chino Hills Municipal Code § 16.10.030. The code attaches notes or conditions to this value; read the section before relying on it.
General information, not legal advice.
Ask about a Chino Hills property in RM-3
Ask GoCodebook what you can build at a specific address and get an answer that cites the section.
Ask your question