ADU permit cost and fee breakdown in Concord, California

An early-budgeting estimate of the permit-related fees an accessory dwelling unit is likely to incur in Concord. These are not official figures.

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7 fee lines

ADU size

California generally exempts ADUs under 750 sq ft from development impact fees, so the 749 / 750 / 751 steps are worth comparing.

400 sq ft 500 sq ft 749 sq ft 750 sq ft 751 sq ft 1,000 sq ft 1,200 sq ft

Estimated total permit fees at 750 sq ft

$4,350 – $27,750

Assumed construction valuation

$270,000

Used only to compute valuation-based fees. It is not a construction quote.

Where the money goes

Building permit$1,500 – $4,500
The core permit issued by the city building department.
Plan check$800 – $2,500
Review of your drawings for code compliance.
Impact fees$0 – $8,000
Development impact fees. Often waived for ADUs under 750 sq ft.
School district fees$0 – $5,000
Developer fees charged by the local school district.
Utility connection$1,500 – $6,000
Water, sewer, and electrical connection or capacity charges.
Inspection$500 – $1,500
Field inspections during construction.
Technology & surcharges$50 – $250
Records, technology, and general plan surcharges.

The darker segment is the low end of the range; the full bar is the high end.

Read before you budget

Most fee lines are working estimates rather than verified published city rates. Confirm every line with the city before budgeting.
Totals do not vary by ADU size for this city, so the size selector will not change the estimate.

Fee items

Building permit

The core permit issued by the city building department.

Fee	Amount	Basis	Source
Building permit fee	$1,500 – $4,500	Estimated range	Fees - Concord, CA

Building permit fee
$1,500 – $4,500
Estimated range
Fees - Concord, CA

Plan check

Review of your drawings for code compliance.

Fee	Amount	Basis	Source
ADU engineering fee	$800 – $2,500	Estimated range	Engineering Fees for an Accessory Dwelling Unit (ADU)

ADU engineering fee
$800 – $2,500
Estimated range
Engineering Fees for an Accessory Dwelling Unit (ADU)

Impact fees

Development impact fees. Often waived for ADUs under 750 sq ft.

Fee	Amount	Basis	Source
California ADU impact fee baseline	$0 – $8,000	Estimated range	Accessory Dwelling Units (ADUs) - Concord, CA

California ADU impact fee baseline
$0 – $8,000
Estimated range
Accessory Dwelling Units (ADUs) - Concord, CA

School district fees

Developer fees charged by the local school district.

Fee	Amount	Basis	Source
School District Development Fee (Estimated)	$0 – $5,000	Estimated range

School District Development Fee (Estimated)
$0 – $5,000
Estimated range

Utility connection

Water, sewer, and electrical connection or capacity charges.

Fee	Amount	Basis	Source
Utility connection review / meter charges	$1,500 – $6,000	Estimated range	Accessory Dwelling Units (ADUs) - Concord, CA

Utility connection review / meter charges
$1,500 – $6,000
Estimated range
Accessory Dwelling Units (ADUs) - Concord, CA

Inspection

Field inspections during construction.

Fee	Amount	Basis	Source
Inspection fees	$500 – $1,500	Estimated range	Fees - Concord, CA

Inspection fees
$500 – $1,500
Estimated range
Fees - Concord, CA

Technology & surcharges

Records, technology, and general plan surcharges.

Fee	Amount	Basis	Source
Technology / General Plan Surcharge (Estimated)	$50 – $250	Estimated range

Technology / General Plan Surcharge (Estimated)
$50 – $250
Estimated range

These are estimates, not official fees

Use these figures for early budgeting only. They are not a quote, not a government fee determination, and not legal advice. Actual fees depend on your parcel, your plans, your construction valuation, your utility provider, and the fee schedule in force on the day your permit is issued. Confirm every number with Concord before you commit money.

City reference pages for verification

Back to Concord · How we build these estimates