Santa Monica · Zoning · R4
Santa Monica R4 zoning: height, setbacks and lot size
In Santa Monica's R4 zone, generally buildings can be up to 45 ft (3 stories) tall, the front setback is 20 ft and the minimum lot size is 5,000 sq ft, with the conditions listed below (Santa Monica code, read October 2026).
Key points
- Maximum building height: 45 ft (Housing projects; a 45-degree daylight plane applies above 40 ft)
- Maximum number of stories: 3 stories (Tier 1 Non-Housing Projects—Base Standard)
- Minimum front setback: 20 ft
- Minimum side setback: 8 ft (Parcels 50 feet or more in width)
- Minimum rear setback: 15 ft
- Minimum lot size: 5,000 sq ft
- Maximum floor area ratio (FAR): 2.0 (Housing Projects)
- Maximum density: 1 unit per 900 sq ft of parcel area (Housing Projects)
R4 is a zoning district in Santa Monica. Every value below was read from the Santa Monica 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 R4
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 | 45 ft Applies: Housing projects; a 45-degree daylight plane applies above 40 ft § 9.08.030 · code textTable row “Housing Projects”, column “R4”: 45. See(B) |
|---|---|
| Maximum number of stories | 3 stories Applies: Tier 1 Non-Housing Projects—Base Standard § 9.08.030 · code textTable row “Tier 1 Non-Housing Projects—Base Standard”, column “R4”: 3 |
| Minimum front setback | 20 ft § 9.08.030 · code textTable row “Front (ft.)”, column “R4”: 20 See(C)(E) |
| Minimum side setback | 8 ft Applies: Parcels 50 feet or more in width § 9.08.030 · code textTable row “Interior Side (ft.)—Parcels 50 feet or more in width”, column “R4”: 8 See(E) |
| Minimum rear setback | 15 ft § 9.08.030 · code textTable row “Rear (ft.)”, column “R4”: 15 |
| Minimum lot size | 5,000 sq ft § 9.08.030 · code textTable row “Minimum Parcel Size (sq. ft.)”, column “R4”: 5,000 |
| Maximum floor area ratio (FAR) | 2.0 Applies: Housing Projects § 9.08.030 · code textTable row “Housing Projects”, column “R4”: 2.0 |
| Maximum density | 1 unit per 900 sq ft of parcel area Applies: Housing Projects § 9.08.030 · code textTable row “Housing Projects”, column “R4”: 1 unit per 900 sq. ft. of parcel area |
Uses in R4
Uses the code's use tables allow in R4, or allow with a permit. Each links to its page with the code section.
- Duplex — Allowed
- Apartment building — Allowed
- Rooming or boarding house — Allowed
- Bed and breakfast — Needs a conditional use permit — see note
- Child care center — Needs a conditional use permit
- Private school — Needs a conditional use permit
When a different number applies
The code sets other values for particular lots, buildings or locations in R4:
- Minimum side setback: 4 ft, or 16% of parcel width, whichever is greater — Parcels less than 50 ft in width § 9.08.030
Not on this page
We did not find a general lot coverage limit for R4 in the zoning tables we read. The code may still set one elsewhere — check the Santa Monica Municipal Code.
Other Santa Monica zoning districts
Who this affects
Frequently asked questions
What is the maximum building height in Santa Monica's R4 zone?
45 ft (housing projects; a 45-degree daylight plane applies above 40 ft) — Santa Monica Municipal Code § 9.08.030.
What is the maximum number of stories in Santa Monica's R4 zone?
3 stories (tier 1 Non-Housing Projects—Base Standard) — Santa Monica Municipal Code § 9.08.030.
What is the minimum front setback in Santa Monica's R4 zone?
20 ft — Santa Monica Municipal Code § 9.08.030.
What is the minimum side setback in Santa Monica's R4 zone?
8 ft (parcels 50 feet or more in width) — Santa Monica Municipal Code § 9.08.030.
What is the minimum rear setback in Santa Monica's R4 zone?
15 ft — Santa Monica Municipal Code § 9.08.030.
General information, not legal advice.
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