Illinois Commercial Building Permit Cost Estimator

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.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }

Illinois Commercial Building Permit Cost Estimator

Estimate the cost of a commercial building permit in Illinois based on your project's construction valuation, type, and municipality size. Fees are calculated using ICC/IBC-based sliding scale schedules commonly adopted across Illinois jurisdictions.

Total Construction Valuation ($)

Enter the total estimated cost of construction (materials + labor).

Project Type

New Construction Addition / Expansion Alteration / Renovation Change of Occupancy

Municipality Size

Large City (Chicago, Aurora, Rockford — pop. 100,000+) Medium City (pop. 25,000–99,999) Small City / Village (pop. under 25,000)

Gross Floor Area (sq ft)

Used to calculate plan review and inspection fees.

Number of Stories

Fire Suppression System?

No Yes (sprinkler permit required)

Electrical Permit Required?

Yes No

Plumbing Permit Required?

Yes No

HVAC / Mechanical Permit Required?

Yes No

Calculate Permit Cost

function illCalc() { // --- Gather inputs --- var valuation = parseFloat(document.getElementById('ill-valuation').value); var projectType = document.getElementById('ill-project-type').value; var municipality = document.getElementById('ill-municipality').value; var sqft = parseFloat(document.getElementById('ill-sqft').value); var stories = parseInt(document.getElementById('ill-stories').value) || 1; var fireSup = document.getElementById('ill-fire-suppression').value; var electrical = document.getElementById('ill-electrical').value; var plumbing = document.getElementById('ill-plumbing').value; var hvac = document.getElementById('ill-hvac').value;

// --- Validation --- var errors = []; if (isNaN(valuation) || valuation 100) errors.push("Number of stories must be between 1 and 100.");

if (errors.length > 0) { document.getElementById('ill-result').style.display = 'block'; document.getElementById('ill-result').innerHTML = 'Please fix the following:' + errors.map(function(e){ return ''; }).join('') + ''; return; }

// ============================================================ // BASE BUILDING PERMIT FEE // Illinois jurisdictions commonly use the ICC Building Valuation // sliding-scale fee table. The schedule below reflects the // widely adopted Illinois Municipal League / ICC model ordinance. // // Fee Schedule (on construction valuation): // $1 – $500: $23.50 flat // $501 – $2,000: $23.50 + $3.05 per $100 (or fraction) over $500 // $2,001 – $25,000: $69.25 + $14.00 per $1,000 (or fraction) over $2,000 // $25,001 – $50,000: $391.25 + $10.10 per $1,000 (or fraction) over $25,000 // $50,001 – $100,000: $643.75 + $7.00 per $1,000 (or fraction) over $50,000 // $100,001 – $500,000: $993.75 + $5.60 per $1,000 (or fraction) over $100,000 // $500,001 – $1,000,000:$3,233.75 + $4.75 per $1,000 (or fraction) over $500,000 // $1,000,001+: $5,608.75 + $3.65 per $1,000 (or fraction) over $1,000,000 // ============================================================ var baseFee = 0; if (valuation '; html += 'Fee ComponentAmount';

var rows = [ ['Base Building Permit Fee', baseFee], ['Plan Review Fee (65% of base)', planReviewFee], ['Inspection Fee', inspectionFee], ]; if (fireSupFee > 0) rows.push(['Fire Suppression / Sprinkler Permit', fireSupFee]); if (electricalFee > 0) rows.push(['Electrical Permit', electricalFee]); if (plumbingFee > 0) rows.push(['Plumbing Permit', plumbingFee]); if (hvacFee > 0) rows.push(['HVAC / Mechanical Permit', hvacFee]); rows.push(['Illinois CDB State Surcharge (1%)', stateSurcharge]);

rows.forEach(function(r, i) { var bg = i % 2 === 0 ? '#f9f9f9' : '#fff'; html += '' + '' + r[0] + '' + '' + fmt(r[1]) + ''; });

html += '' + 'TOTAL ESTIMATED PERMIT COST' + '' + fmt(total) + ''; html += '';

html += 'Effective Permit Rate: ' + effectiveRate.toFixed(3) + '% of construction valuation

';

html += '' + 'Note: This estimate is based on the ICC model fee schedule and typical Illinois municipal ordinances. ' + 'Actual fees vary by jurisdiction. Always verify with your local building department before submitting permits.

';

document.getElementById('ill-result').style.display = 'block'; document.getElementById('ill-result').innerHTML = html; }

#### Formula & Fee Schedule

Base Building Permit Fee — ICC sliding-scale schedule (widely adopted in Illinois):

Project Type Multiplier: New/Addition = 1.00 × | Alteration = 0.85 × | Change of Occupancy = 0.70 ×

Municipality Multiplier: Large (100k+ pop.) = 1.20 × | Medium = 1.00 × | Small/Village = 0.90 ×

Plan Review Fee = Base Fee × 65%

Inspection Fee = (Sq Ft × $0.08) + ((Stories − 1) × $75)

Fire Suppression Permit = $150 + (Sq Ft × $0.12)

Electrical Permit = max($150, $100 + Sq Ft × $0.04)

Plumbing Permit = max($125, $75 + Sq Ft × $0.035)

HVAC / Mechanical Permit = max($100, $75 + Sq Ft × $0.03)

Illinois CDB State Surcharge = Base Fee × 1%

Total = Base + Plan Review + Inspection + Fire + Electrical + Plumbing + HVAC + State Surcharge

#### Assumptions & References

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References

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