Rancho Cucamonga L zoning: height, setbacks and lot size

L (Low Residential) is a zoning district in Rancho Cucamonga. Every value below was read from the Rancho Cucamonga 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 L

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 § 17.36.010 · code text Table row “Primary buildings”, column “L”: 35 ft
Maximum number of stories	1 story Applies: only for new units built under the SB 9 two-unit rules § 17.36.020 · code text No residential unit shall exceed a building height of one story.
Minimum front setback	37 ft Applies: average setback measured from the curb face; it may vary by 5 ft either way See notes 4, 5 below the table in the code. § 17.36.010 · code text Table row “Front yard (4)”, column “L”: 37 ft (5) Note 4: Setbacks are measured between the structure and curb face in front yards and corner side yards. Setbacks are measured between the structure and property line in rear yards and interior side yards. Note 5: Average setback, which shall vary +/- five feet.
Minimum rear setback	20 ft See note 4 below the table in the code. § 17.36.010 · code text Table row “Rear yard (4)”, column “L”: 20 ft Note 4: Setbacks are measured between the structure and curb face in front yards and corner side yards. Setbacks are measured between the structure and property line in rear yards and interior side yards.
Minimum lot size	7,200 sf § 17.36.010 · code text Table row “Lot area (minimum)”, column “L”: 7,200 sf
Maximum lot coverage	40% § 17.36.010 · code text Table row “Lot coverage”, column “L”: 40%
Maximum density	6 du/ac § 17.36.010 · code text Table row “Maximum density”, column “L”: 6 du/ac

Uses in L

Uses the code's use tables allow in L, or allow with a permit. Each links to its page with the code section.

Duplex — Allowed
Bed and breakfast — Needs a minor use permit
Private school — Needs a minor use permit — see note

When a different number applies

The code sets other values for particular lots, buildings or locations in L:

Maximum building height: 16 ft — only for new units built under the SB 9 two-unit rules § 17.36.020
Minimum side setback: 4 ft — only for new units built under the SB 9 two-unit rules, unless Government Code section 65852.21 allows less § 17.36.020
Minimum rear setback: 4 ft — only for new units built under the SB 9 two-unit rules, unless Government Code section 65852.21 allows less § 17.36.020

Not on this page

We did not find a general side setback, FAR limit for L in the zoning tables we read. The code may still set one elsewhere — check the Rancho Cucamonga Municipal Code.

Other Rancho Cucamonga zoning districts

Who this affects

HomeownersArchitects and designersDevelopersReal estate agents

Frequently asked questions

What is the maximum building height in Rancho Cucamonga's L zone?

35 ft — Rancho Cucamonga Municipal Code § 17.36.010.

What is the maximum number of stories in Rancho Cucamonga's L zone?

1 story (only for new units built under the SB 9 two-unit rules) — Rancho Cucamonga Municipal Code § 17.36.020.

What is the minimum front setback in Rancho Cucamonga's L zone?

37 ft (average setback measured from the curb face; it may vary by 5 ft either way) — Rancho Cucamonga Municipal Code § 17.36.010.

What is the minimum rear setback in Rancho Cucamonga's L zone?

20 ft — Rancho Cucamonga Municipal Code § 17.36.010.

What is the minimum lot size in Rancho Cucamonga's L zone?

7,200 sf — Rancho Cucamonga Municipal Code § 17.36.010.

General information, not legal advice.