ADU fees in El Monte

Short answer

El Monte's code says City impact fees apply to an ADU from 750 sq ft, but the published sources here do not establish a local impact-fee dollar total. The City publishes school fees for ADUs over 500 sq ft and a building permit fee formula based on valuation.

Last verified 2026-10-18. Rules change; the City of El Monte Building & Safety Division has the final word ((626) 580-2050).

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The rules

No City impact fees (parks, traffic, water, sewer) on the ADULocal rule
Under 750 sq ftEl Monte Municipal Code 17.110.030(S)(1)
School district fees (the rate varies by district)Local rule
$3.36-$3.43 per sq ft on ADUs over 500 sq ftPublished rate, not a quote for your project: an estimate until the agency confirms it.City of El Monte Building Permit Fee Schedule FY 2026/2027, school fees
City building permit fee above $100,000 of valuation (plan check adds 85%)Local rule
$2,413.35 + $12.49 per $1,000 over $100,000Published rate, not a quote for your project: an estimate until the agency confirms it.City of El Monte Building Permit Fee Schedule FY 2026/2027, effective July 1, 2026
State impact-fee threshold for an ADUState law
No impact fee at 750 sq ft of interior livable space or less; a larger ADU is charged proportionately to the main homeGov. Code 66311.5(c)(1)
State school-fee area thresholdState law
An ADU or junior ADU under 500 sq ft is treated as not adding 500 sq ft of assessable space under Education Code 17620Gov. Code 66311.5(c)(3); Education Code 17620
State impact fee for a junior ADUState law
No impact fee at 500 sq ft of interior livable space or lessGov. Code 66311.5(c)(1)

What to know in El Monte

The City code starts impact fees at 750 sq ft

El Monte Municipal Code 17.110.030(S)(1) directs owners to pay applicable parks, traffic, water and sewer impact fees for an ADU of 750 sq ft or larger. The City's cited materials do not establish the dollar amounts for a particular lot.

El Monte Municipal Code 17.110.030(S)(1)

State law uses different threshold wording

Government Code 66311.5(c)(1) bars impact fees on an ADU with 750 sq ft of interior livable space or less. The City code's '750 or larger' wording and the state text differ at exactly 750 sq ft, so confirm that boundary with Building & Safety.

California Government Code 66311.5(c)(1)

What we couldn't confirm

  • The City impact-fee dollar amount for this parcel is not confirmed in the cited documents.
  • The final building permit and school-district fee estimate for a proposed ADU is not confirmed by the published schedule.

Ask the City of El Monte Building & Safety Division before you rely on these.

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Our free check reads your lot against the El Monte rules above from public records: a screening, not a permit or professional advice.

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Floor plans to start from

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El Monte ADU fee questions

At what size does El Monte charge ADU impact fees?

El Monte Municipal Code 17.110.030(S)(1) says applicable City impact fees begin at 750 sq ft. Government Code 66311.5(c)(1) bars them through 750 sq ft of interior livable space, so the two sources differ at exactly 750 sq ft; confirm that case with Building & Safety.

What school fee does El Monte publish for an ADU?

For an initial school-fee estimate, the City's FY 2026/2027 Building Permit Fee Schedule lists a residential range of $3.36-$3.43 per sq ft for projects over 500 sq ft, varying by district. The district must confirm the charge.

How is the El Monte building permit fee calculated?

For an initial fee estimate when valuation exceeds $100,000, the City's FY 2026/2027 Building Permit Fee Schedule lists a base $2,413.35 plus $12.49 for each additional $1,000 or fraction. Standard plan check adds 85% of the permit fee, with a listed minimum; the City must confirm the total.

Is this a permit, or a plan I can build from?

Neither. It is a screening from public records, not professional advice, and not a survey, soils report, appraisal, loan offer or permit; every number is an estimate. A licensed designer confirms the final plan, and your city or county gives final approval.

More about ADUs in El Monte

Fees in other areas

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