Commercial Lease Space Cost Calculator
ANA›Life Services Authority›National Calculator Authority›Commercial Lease Space Cost Calculator
.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; } }
Commercial Lease Space Cost Calculator
Calculate the total cost of leasing commercial space including base rent, NNN charges, operating expenses, and one-time fees.
Rentable Square Footage (sq ft)
Base Rent Rate ($ per sq ft per year)
Lease Type
Gross Lease (all-inclusive) Triple Net (NNN) Lease Modified Gross Lease
Property Taxes ($ per sq ft per year)
Building Insurance ($ per sq ft per year)
CAM / Maintenance ($ per sq ft per year)
Tenant-Paid Operating Expenses ($ per sq ft per year)
Lease Term (months)
Free Rent / Abatement Period (months)
Annual Rent Escalation (%)
Security Deposit (months of base rent)
Tenant Improvement (TI) Allowance ($ per sq ft)
Monthly Parking Cost ($)
Calculate
function comToggleNNN() { var type = document.getElementById('com-lease-type').value; document.getElementById('com-nnn-section').style.display = (type === 'nnn') ? 'block' : 'none'; document.getElementById('com-modified-section').style.display = (type === 'modified') ? 'block' : 'none'; }
function comCalc() { var sqft = parseFloat(document.getElementById('com-sqft').value); var baseRent = parseFloat(document.getElementById('com-base-rent').value); var leaseType = document.getElementById('com-lease-type').value; var leaseTerm = parseFloat(document.getElementById('com-lease-term').value); var freeRent = parseFloat(document.getElementById('com-free-rent').value) || 0; var escalation = parseFloat(document.getElementById('com-escalation').value) || 0; var secDeposit = parseFloat(document.getElementById('com-security-deposit').value) || 0; var tiAllowance = parseFloat(document.getElementById('com-ti-allowance').value) || 0; var parking = parseFloat(document.getElementById('com-parking').value) || 0; var resultDiv = document.getElementById('com-result');
// Validation if (isNaN(sqft) || sqft ⚠ Please enter a valid square footage greater than 0.'; return; } if (isNaN(baseRent) || baseRent ⚠ Please enter a valid base rent rate (0 or greater).'; return; } if (isNaN(leaseTerm) || leaseTerm ⚠ Please enter a valid lease term of at least 1 month.'; return; } if (freeRent >= leaseTerm) { resultDiv.style.display = 'block'; resultDiv.innerHTML = '⚠ Free rent period must be less than the total lease term.'; return; }
// NNN / operating expense add-ons ($ per sq ft per year) var nnnPerSqFtYear = 0; if (leaseType === 'nnn') { var taxes = parseFloat(document.getElementById('com-taxes').value) || 0; var insurance = parseFloat(document.getElementById('com-insurance').value) || 0; var cam = parseFloat(document.getElementById('com-cam').value) || 0; nnnPerSqFtYear = taxes + insurance + cam; } else if (leaseType === 'modified') { nnnPerSqFtYear = parseFloat(document.getElementById('com-tenant-opex').value) || 0; }
// Monthly base rent for year 1 (no escalation yet) // Base rent rate is annual $/sqft, so monthly = rate * sqft / 12 var baseMonthly1 = (baseRent * sqft) / 12; var nnnMonthly = (nnnPerSqFtYear * sqft) / 12;
// Calculate total rent paid over lease term with annual escalation // Escalation applies to base rent only (NNN charges float with actuals, held constant here) // Year-by-year calculation var leaseTermYears = leaseTerm / 12; var totalBaseRent = 0; var totalNNN = 0; var payingMonths = leaseTerm - freeRent; // months actually paying rent
// Build month-by-month schedule var yearlyBaseRents = []; var annualEscRate = escalation / 100; for (var y = 0; y = yearlyBaseRents.length) yearIndex = yearlyBaseRents.length - 1; totalBaseRentPaid += yearlyBaseRents[yearIndex]; totalNNNPaid += nnnMonthly; paidMonthCount++; }
// Security deposit (based on year-1 monthly base rent) var secDepositAmt = secDeposit * baseMonthly1;
// TI allowance (landlord credit — reduces effective cost) var tiTotal = tiAllowance * sqft;
// Total parking over lease term var totalParking = parking * leaseTerm;
// Total occupancy cost var totalOccupancyCost = totalBaseRentPaid + totalNNNPaid + totalParking;
// Effective cost after TI allowance var effectiveTotalCost = totalOccupancyCost - tiTotal;
// Effective monthly cost (over paying months) var effectiveMonthly = (paidMonthCount > 0) ? effectiveTotalCost / paidMonthCount : 0;
// Effective annual cost per sq ft var effectiveAnnualPerSqFt = (effectiveTotalCost / (leaseTerm / 12)) / sqft;
// Year-1 all-in monthly cost var year1Monthly = baseMonthly1 + nnnMonthly + parking;
function fmt(n) { return n.toLocaleString('en-US', {minimumFractionDigits: 2, maximumFractionDigits: 2}); }
var leaseTypeLabel = leaseType === 'nnn' ? 'Triple Net (NNN)' : leaseType === 'modified' ? 'Modified Gross' : 'Gross';
var html = '### ✓ Commercial Lease Cost Summary '; html += ''; html += 'Lease Type' + leaseTypeLabel + ''; html += 'Rentable Area' + sqft.toLocaleString() + ' sq ft'; html += 'Lease Term' + leaseTerm + ' months (' + leaseTermYears.toFixed(2) + ' yrs)'; html += 'Free Rent Period' + freeRent + ' month(s)'; html += 'Year 1 Base Rent (monthly)$' + fmt(baseMonthly1) + ''; if (nnnMonthly > 0) { html += 'NNN / Operating Expenses (monthly)$' + fmt(nnnMonthly) + ''; } if (parking > 0) { html += 'Parking (monthly)$' + fmt(parking) + ''; } html += 'Year 1 All-In Monthly Cost$' + fmt(year1Monthly) + ''; html += 'Total Base Rent (lease term)$' + fmt(totalBaseRentPaid) + ''; if (totalNNNPaid > 0) { html += 'Total NNN / OpEx (lease term)$' + fmt(totalNNNPaid) + ''; } if (totalParking > 0) { html += 'Total Parking (lease term)$' + fmt(totalParking) + ''; } html += 'Total Occupancy Cost$' + fmt(totalOccupancyCost) + ''; if (tiTotal > 0) { html += 'Less: TI Allowance-$' + fmt(tiTotal) + ''; } html += 'Net Effective Total Cost$' + fmt(effectiveTotalCost) + ''; html += 'Effective Monthly Cost (paying months)$' + fmt(effectiveMonthly) + ''; html += 'Effective Annual Cost per Sq Ft$' + fmt(effectiveAnnualPerSqFt) + ' / sq ft'; if (secDepositAmt > 0) { html += 'Security Deposit (upfront, refundable)$' + fmt(secDepositAmt) + ''; } html += '';
resultDiv.style.display = 'block'; resultDiv.innerHTML = html; }
#### Formulas Used
Monthly Base Rent (Year 1): Monthly Base Rent = (Base Rent Rate × Sq Ft) ÷ 12
Annual Escalation (compounding): Monthly Base Rentyear y = Monthly Base Rentyear 1 × (1 + Escalation Rate)y
NNN Monthly Charge: NNN Monthly = (Property Taxes + Insurance + CAM) × Sq Ft ÷ 12
Total Occupancy Cost: Total = Σ (Monthly Base Rent + NNN Monthly + Parking) for each paying month (Free rent months are excluded from base rent and NNN payments)
Net Effective Total Cost: Net Effective Cost = Total Occupancy Cost − TI Allowance
Effective Annual Cost per Sq Ft: = Net Effective Total Cost ÷ (Lease Term in Years) ÷ Sq Ft
Security Deposit: Security Deposit = Security Deposit Months × Year-1 Monthly Base Rent
#### Assumptions & References
- Gross Lease: Tenant pays a flat rent; landlord covers taxes, insurance, and maintenance.
- Triple Net (NNN) Lease: Tenant pays base rent plus their pro-rata share of property taxes, building insurance, and common area maintenance (CAM). NNN charges are held constant over the term as an approximation; actual charges float annually.
- Modified Gross Lease: A hybrid where the tenant pays base rent plus specified operating expenses negotiated at signing.
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