Kane County prices building permits with a fee table based on floor area, with a $3,000.00 minimum, then charges plan review at 25% of the permit fee (minimum $100.00). Enter your project to see the exact math.
Official county schedule
Effective Jan 1, 2026
Verified Nov 5, 2026
Minimum fee
$3,000.00
Plan review
25%
$75k addition
$460
Permit fee calculator
Kane County schedule, eff. Jan 1, 2026
$
sq ft
Estimated permit fees$460.00
1. Building permit fee $0.00 for the first 0 sq ft + $90.00 × 4 per 100 sq ft over$360.00
2. Plan review fee 25% of $360.00 → minimum $100.00$100.00
May also apply (not in the total)
Work started before obtaining a permit When: work started before the permit was obtained$360.00
Fees are estimates based on the official schedule linked below. Confirm with the permit office before applying. Separate electrical, plumbing, mechanical, fire, impact, utility and school fees are usually not included unless they are listed. BuildingPermitCost is not a government permit office, and this is not legal advice.
What common projects cost
Kitchen or bath remodel
$25,000 value, remodel 300 sq ft
$460.00
$360.00 building permit + $100.00 plan review
Room addition
$75,000 value, addition 400 sq ft
$460.00
$360.00 building permit + $100.00 plan review
New single-family home
$350,000 value, new single-family 2,400 sq ft
$3,750.00
$3,000.00 building permit + $750.00 plan review
How Kane County calculates your permit fee
The county charges a building permit fee using a fee table based on floor area, with a $3,000.00 minimum. Plan review is a separate charge: 25% of the permit fee (minimum $100.00).
The fee table
New 1-2 family dwelling (floors above ground + basement)
Floor area
Fee
Over 0 sq ft
$90.00 per 100 sq ft or fraction
Residential addition / accessory building 200 sq ft or more
Floor area
Fee
Over 0 sq ft
$90.00 per 100 sq ft or fraction
Residential alteration/remodel/repair
Project value
Fee
$1 – $1,000
$120.00
Over $1,000
$120.00 for the first $1,000 + $10.00 per additional $1,000 or fraction
Commercial new construction and additions
Floor area
Fee
Over 0 sq ft
$120.00 per 100 sq ft or fraction
Commercial alteration/remodel
Project value
Fee
$1 – $1,000
$120.00
Over $1,000
$120.00 for the first $1,000 + $10.00 per additional $1,000 or fraction
What counts as project value
Floor area (square feet). New homes and additions are priced per 100 sq ft (or portion) of floor area (each floor above ground plus basement; crawl space at a lower rate for new homes). Alterations/remodels use the estimated cost: $120 for the first $1,000 plus $10 per additional $1,000 or portion. The source does not say how estimated cost is verified.
Worked example: a $350,000 new home
Building permit fee: $0.00 for the first 0 sq ft + $90.00 × 24 per 100 sq ft over → minimum $3,000.00 = $3,000.00
Plan review fee: 25% of $3,000.00 = $750.00
Total before trade permits: $3,750.00.
Fees people miss
May also apply (not in the totals above)
Work started before obtaining a permit: when work started before the permit was obtained; $360.00 on the standard projects.
Fee
Amount
Crawl space, new residential constructionWhen: new home with crawl space
$35.00 per 100 sq ft or portion
Re-inspection / incomplete or missed inspectionWhen: second re-inspection onward, incomplete work or missed inspection
$120.00 each
Permit extensionWhen: permit extension requested
$180.00 each
Plan re-examination of changes after issuanceWhen: changes to approved plans after issuance
$50.00 per hour
Electrical service upgrade, residentialWhen: service upgrade
$180.00 each
Electrical service upgrade, nonresidentialWhen: service upgrade
$350.00 each
Establishment of use / change of useWhen: new business or change of use
$600.00 each
Religious, educational or charitable projects: maximum fee per permitWhen: religious, educational or charitable purpose
$2,000.00 cap
How to apply
Gather your plans and your project's total value and floor area.
Pay the permit and plan review fees when invoiced.
Questions: 630-232-3485 · Kane County Government Center, 719 S. Batavia Avenue, Building A, 4th Floor, Geneva, IL 60134
How Kane County compares
A $25,000 remodel costs $460.00 in Kane County: 21% above the national median of $380.00, and the 4th highest of 10 places we cover in Illinois (state median $250.00).
A $75,000 addition costs $460.00 in Kane County: 44% below the national median of $820.58, and the 4th lowest of 9 places we cover in Illinois (state median $600.00).
A $350,000 new home costs $3,750.00 in Kane County: 28% above the national median of $2,918.63, and the 2nd highest of 9 places we cover in Illinois (state median $2,460.00).
Cities in Kane County with their own fee schedule on this site: Aurora, Elgin. Inside those cities, check whether the city or the county issues your permit.
A $25,000 remodel: $460.00. A $75,000 addition: $460.00. A $350,000 new single-family: $3,750.00. These include every fee the schedule applies to that project; trade permits are separate.
Is plan review included in the Kane County permit fee?
No. Plan review is charged separately at 25% of the permit fee (minimum $100.00).
How does Kane County determine project value?
Floor area (square feet). New homes and additions are priced per 100 sq ft (or portion) of floor area (each floor above ground plus basement; crawl space at a lower rate for new homes). Alterations/remodels use the estimated cost: $120 for the first $1,000 plus $10 per additional $1,000 or portion. The source does not say how estimated cost is verified.
When did these Kane County fees take effect?
The schedule is effective Jan 1, 2026 (“Chapter 6 Article IV Fees – Effective January 1, 2026”). We last checked it against the official source on Nov 5, 2026.
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