ADU Regulations in El Monte, California (2026)

Regulations at a glance

Local rules & notes

Multi-Family Density Incentive: The City allows a beneficial combination of ADUs on multi-family lots: two detached units plus converted units up to 25% of existing units. Illegal Garage Conversion Standards: The City ordinance impermissibly requires removing the garage door and installing a 4-foot planter for conversions. HCD states this must be removed. Impermissible Bedroom Limit: The City limits ADUs to a maximum of two bedrooms. HCD states this violates state law and fair housing laws. Roof Area in Lot Coverage: The City includes roofed areas (overhangs) in lot coverage calculations, which HCD identifies as an impermissible constraint on ADU size. Building Separation Requirement: The City requires a 10-foot separation between the ADU and the primary dwelling. HCD notes this cannot prohibit an 800 sqft ADU. Subjective Design Review: The City requires ADUs to have the 'appearance of a single-family dwelling' and be 'integrated'. HCD flags this as an impermissible subjective requirement.

For the official ordinance and latest updates, check your city or county planning department.

Frequently asked questions about ADU regulations in El Monte

• What is the maximum ADU size in El Monte, California?

  In El Monte, the maximum ADU size is typically 1000 square feet, depending on whether the unit is attached or detached. California state law allows up to 1,200 sq ft for detached ADUs and 800 sq ft for attached in many jurisdictions; El Monte may follow state defaults or have local limits. Verify with El Monte planning for your specific lot.

• What are the setback requirements for ADUs in El Monte?

  In El Monte, typical setback requirements are 4 feet from the side property line and 4 feet from the rear. These may be reduced to 4 feet under California Government Code § 65852.2 where applicable. Check with El Monte planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in El Monte?

  In El Monte, the maximum height for an ADU is generally 16 feet. State law often allows up to 16 feet for detached ADUs and up to 25 feet when within 4 feet of the property line in some cases. Confirm with El Monte or county planning for your zone.

• Is ADU approval ministerial in El Monte?

  In El Monte, ADU approval is typically Ministerial (by-right) per Gov Code §65852.2. Ministerial (by-right) review means the city must approve qualifying applications without discretionary review, per California Gov Code § 65852.2. Your project must still meet objective standards; El Monte planning can confirm the exact process.

• Are there parking requirements for ADUs in El Monte?

  In El Monte, parking for ADUs is generally Often waived per state law; check local ordinance. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with El Monte planning for your address.