El Monte, CA Building Safety: Anti-Mansionization (2026)
Key Facts
- Small-lot FAR
- 0.35 on lots up to 8,000 sq ft
- Large-lot FAR
- 0.20 or 5,000 sq ft over 20,000 sq ft
- 2nd-story setback
- 5 ft. additional from 1st-story line
- Governing table
- Table 17.20-2, EMMC Sec. 17.20.050
- Garage exclusion
- Up to 650 sq ft per unit excluded
- Enforcing office
- Community Development Department plan check
Summary
El Monte limits new house size with a sliding floor-area ratio in Table 17.20-2 of the R-1 zoning code, not a flat ban on large homes. FAR falls from 0.35 on lots under 8,000 square feet to 0.20 (or a 5,000-square-foot floor) on lots over 20,000 square feet, and second stories must step back an extra five feet from the first-story setback line.
Table 17.20-2—Development Standards—One-family Dwelling Zoning Districts Maximum Floor Area ≤8,000 sq. ft. 0.35 8,001 to 12,000 sq. ft. 0.30 or 2,800 sq. ft., whichever is greater 12,001 to 20,000 sq. ft. 0.25 or 3,600 sq. ft., whichever is greater >20,000 sq. ft. 0.20 or 5,000 sq. ft., whichever is greater
Full Breakdown
20 FAR or 5,000 square feet on lots larger than 20,000 square feet. C: net floor area is divided by net lot area, garages up to 650 square feet per unit and up to 120 square feet of storage space are excluded from the count, and any portion of a structure taller than seventeen feet is counted twice toward gross floor area, a doubling rule that discourages tall, boxy additions. 20-2 pairs the FAR cap with a bulk control on the vertical: a second story must sit five additional feet back from the first-story line on the front, street-side and interior-side yards, on top of the base 20-foot front, 10-foot street-side and 5-foot interior-side setbacks, so upper floors step down rather than overhanging the yard.
R-1C lots, the largest-minimum-lot district at 10,000 square feet, are held to the lowest tier of the scale and a height ceiling of 1½ stories and 25 feet, tighter than the 2 stories and 30 feet allowed in R-1A and R-1B. 130 for specific yard exceptions to the second-story setback.
Violations & Fines
There's no separate fine schedule for exceeding Table 17.20-2; the standard is enforced at the permit-review stage. Under Section 17.10.020.B and .D, no building may be erected, altered, added to or enlarged except in conformity with the area, yard and floor-area regulations set for its zoning district, so plans exceeding the FAR or ignoring the second-story step-back are rejected until revised. Completed work that was never permitted is subject to Building & Safety correction under Title 15.
Frequently Asked Questions
Does El Monte have a flat maximum house size?
Do garages count toward the floor-area limit?
Can a second story extend to the same setback as the first floor?
Sources & Official References
Other rules in El Monte
California rules heatmap·Compare El Monte to another location·View the California building safety overview
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How other cities in Los Angeles County handle anti-mansionization.