Colorado Commercial Construction Cost Estimator
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Colorado Commercial Construction Cost Estimator
Estimate the total construction cost for a commercial building project in Colorado. Enter your project details below to get a comprehensive cost breakdown including hard costs, soft costs, and site work.
Building Type
Office Building Retail / Strip Mall Warehouse / Industrial Medical / Clinic Restaurant Hotel / Hospitality Multifamily (5+ units) School / Educational Mixed-Use
Gross Building Area (sq ft)
Number of Stories
Construction Quality
Economy / Basic Standard Good Premium / High-End
Colorado Location
Denver Metro (Denver, Aurora, Lakewood) Boulder / Fort Collins Colorado Springs / Pueblo Mountain Resort (Aspen, Vail, Telluride) Grand Junction / Western Slope Rural Colorado
Foundation Type
Slab on Grade Crawl Space Full Basement Deep Foundation / Piles
Parking (spaces)
Parking Type
Surface Lot (Asphalt) Structured Parking Garage No Parking / Street Only
Site Area (acres)
Soft Costs Override (% of hard costs, leave 0 for default)
Contingency (%)
Calculate Estimate
### Colorado Commercial Construction Cost Estimate
Cost Category Amount $/SF
function colFmt(n) { return '$' + Math.round(n).toLocaleString('en-US'); } function colFmtSF(n) { return '$' + n.toFixed(2); }
// Base cost per SF by building type (Standard quality, Denver Metro, 2024 Colorado data) var colBaseCosts = { office: { low: 175, mid: 225, high: 300, premium: 420 }, retail: { low: 120, mid: 165, high: 220, premium: 310 }, warehouse: { low: 65, mid: 95, high: 135, premium: 185 }, medical: { low: 250, mid: 340, high: 450, premium: 600 }, restaurant: { low: 200, mid: 280, high: 380, premium: 520 }, hotel: { low: 180, mid: 250, high: 340, premium: 480 }, multifamily: { low: 155, mid: 210, high: 285, premium: 390 }, school: { low: 200, mid: 265, high: 350, premium: 460 }, mixed: { low: 165, mid: 220, high: 295, premium: 410 } };
// Quality multipliers var colQualityMult = { economy: 0.80, standard: 1.00, good: 1.22, premium: 1.55 };
// Location cost index (relative to Denver Metro = 1.00) var colLocationMult = { 'denver': 1.00, 'boulder': 1.06, 'colorado-springs': 0.92, 'mountain': 1.35, 'grand-junction': 0.88, 'rural': 0.82 };
// Foundation cost adder per SF var colFoundationAdder = { slab: 0, crawl: 8, basement: 28, deep: 45 };
// Stories multiplier (high-rise premium) function colStoriesMult(stories) { if (stories 50) errors.push('Number of stories cannot exceed 50.'); if (isNaN(siteAcres) || siteAcres 30) errors.push('Contingency must be between 0% and 30%.'); if (softOverride 50) errors.push('Soft cost override must be between 0% and 50%.');
if (errors.length > 0) { errEl.innerHTML = 'Please fix the following errors:' + errors.map(function(e){ return ''; }).join('') + ''; errEl.style.display = 'block'; return; }
// --- Core Hard Cost Calculation --- var baseCostObj = colBaseCosts[buildingType]; var qualMult = colQualityMult[quality]; var locMult = colLocationMult[location]; var storyMult = colStoriesMult(stories); var foundAdder = colFoundationAdder[foundation];
// Base cost per SF (mid-range of quality band, then apply multipliers) var baseCostPerSF = baseCostObj.mid; var adjustedCostPerSF = (baseCostPerSF * qualMult * locMult * storyMult) + foundAdder;
// Shell / structure (55% of hard cost) var shellCostPerSF = adjustedCostPerSF * 0.55; var shellTotal = shellCostPerSF * sqft;
// Interior finishes (25% of hard cost) var interiorCostPerSF = adjustedCostPerSF * 0.25; var interiorTotal = interiorCostPerSF * sqft;
// MEP - Mechanical, Electrical, Plumbing (20% of hard cost) var mepCostPerSF = adjustedCostPerSF * 0.20; var mepTotal = mepCostPerSF * sqft;
var hardCostBuilding = adjustedCostPerSF * sqft;
// --- Parking Cost --- var parkingCost = 0; var parkingCostPerSpace = 0; if (parkingType === 'surface' && parking > 0) { parkingCostPerSpace = 4500; // Colorado surface lot per space (asphalt, striping, lighting) parkingCost = parking * parkingCostPerSpace; } else if (parkingType === 'structured' && parking > 0) { parkingCostPerSpace = 28000; // Colorado structured garage per space parkingCost = parking * parkingCostPerSpace; }
// --- Site Work --- var siteSF = siteAcres * 43560; // Site work: grading, utilities, landscaping, curb/gutter // Colorado average: $8–$18/SF of site area depending on location var siteWorkPerSF = 10 * locMult; var siteWorkCost = siteSF * siteWorkPerSF;
// --- Total Hard Costs --- var totalHardCost = hardCostBuilding + parkingCost + siteWorkCost;
// --- Soft Costs --- var softPct = (softOverride > 0) ? (softOverride / 100) : colDefaultSoftPct[buildingType]; // Soft costs include: architecture/engineering (8-12%), permits/fees (3-5%), // project management (3-5%), legal/insurance (2-3%), FF&E allowance (2-4%) var softCostTotal = totalHardCost * softPct;
var archEngPct = softPct * 0.45; var permitsPct = softPct * 0.20; var pmPct = softPct * 0.18; var legalInsPct = softPct * 0.10; var ffePct = softPct * 0.07;
var archEngCost = totalHardCost * archEngPct; var permitsCost = totalHardCost * permitsPct; var pmCost = totalHardCost * pmPct; var legalInsCost = totalHardCost * legalInsPct; var ffeCost = totalHardCost * ffePct;
// --- Subtotal before contingency --- var subtotal = totalHardCost + softCostTotal;
// --- Contingency --- var contingencyCost = subtotal * (contingencyPct / 100);
// --- Grand Total --- var grandTotal = subtotal + contingencyCost;
// --- Per SF metrics --- var costPerSFTotal = grandTotal / sqft;
// --- Build result table --- var tbody = document.getElementById('col-result-body'); var tfoot = document.getElementById('col-result-foot');
function row(label, amount, perSF, indent) { var style = indent ? 'style="padding:8px 10px 8px 24px;font-size:0.92em;color:#444;"' : 'style="padding:10px;font-weight:600;"'; var bgStyle = indent ? 'style="padding:8px 10px;text-align:right;font-size:0.92em;color:#444;"' : 'style="padding:10px;text-align:right;font-weight:600;"'; return '' + '' + label + '' + '' + colFmt(amount) + '' + '' + (perSF !== null ? colFmtSF(perSF) : '—') + '' + ''; }
tbody.innerHTML = row('HARD COSTS', hardCostBuilding + parkingCost + siteWorkCost, (hardCostBuilding + parkingCost + siteWorkCost)/sqft, false) + row('Building Shell & Structure', shellTotal, shellCostPerSF, true) + row('Interior Finishes & Tenant Improvements', interiorTotal, interiorCostPerSF, true) + row('MEP (Mechanical, Electrical, Plumbing)', mepTotal, mepCostPerSF, true) + (parking > 0 && parkingType !== 'none' ? row('Parking (' + parking + ' spaces @ ' + colFmt(parkingCostPerSpace) + '/space)', parkingCost, parkingCost/sqft, true) : '') + row('Site Work & Civil (' + siteAcres.toFixed(1) + ' acres)', siteWorkCost, siteWorkCost/sqft, true) + row('SOFT COSTS (' + (softPct*100).toFixed(1) + '% of hard costs)', softCostTotal, softCostTotal/sqft, false) + row('Architecture & Engineering', archEngCost, archEngCost/sqft, true) + row('Permits, Fees & Inspections', permitsCost, permitsCost/sqft, true) + row('Project Management & Owner's Rep', pmCost, pmCost/sqft, true) + row('Legal, Insurance & Financing', legalInsCost, legalInsCost/sqft, true) + row('FF&E Allowance', ffeCost, ffeCost/sqft, true) + row('SUBTOTAL (before contingency)', subtotal, subtotal/sqft, false) + row('Contingency (' + contingencyPct.toFixed(1) + '%)', contingencyCost, contingencyCost/sqft, true);
tfoot.innerHTML = '' + 'TOTAL PROJECT COST ESTIMATE' + '' + colFmt(grandTotal) + '' + '' + colFmtSF(costPerSFTotal) + '/SF' + '';
// Notes var locationNames = { 'denver':'Denver Metro','boulder':'Boulder/Fort Collins', 'colorado-springs':'Colorado Springs','mountain':'Mountain Resort', 'grand-junction':'Grand Junction','rural':'Rural Colorado' }; var buildingNames = { office:'Office',retail:'Retail',warehouse:'Warehouse/Industrial', medical:'Medical/Clinic',restaurant:'Restaurant',hotel:'Hotel', multifamily:'Multifamily',school:'School',mixed:'Mixed-Use' }; document.getElementById('col-result-notes').innerHTML = 'Project Summary: ' + buildingNames[buildingType] + ' | ' + sqft.toLocaleString() + ' SF | ' + stories + ' ' + (stories===1?'story':'stories') + ' | ' + quality.charAt(0).toUpperCase()+quality.slice(1) + ' quality | ' + locationNames[location] + 'Base Cost Range: ' + colFmt(grandTotal * 0.90) + ' – ' + colFmt(grandTotal * 1.15) + ' (±10–15% typical estimating variance)' + 'Cost per SF: ' + colFmtSF(costPerSFTotal) + '/SF total project cost' + 'Estimate reflects 2024 Colorado construction market conditions. Does not include land acquisition, demolition of existing structures, hazardous material abatement, or extraordinary utility extensions.';
resEl.style.display = 'block'; resEl.scrollIntoView({ behavior: 'smooth', block: 'start' }); }
#### Formula
Total Project Cost = (Hard Costs + Soft Costs) × (1 + Contingency%)
Hard Costs = Building Cost + Parking Cost + Site Work Cost
Building Cost = Base Cost/SF × Quality Multiplier × Location Index × Stories Multiplier × GBA (SF) + Foundation Adder/SF × GBA
Building Cost Breakdown:
Parking Cost: Surface = $4,500/space | Structured Garage = $28,000/space
Site Work = Site Area (SF) × $10/SF × Location Index
Soft Costs = Total Hard Costs × Soft Cost % (default 15–28% by building type)
Contingency = (Hard Costs + Soft Costs) × Contingency %
#### Assumptions & References
- Base costs reflect 2024 Colorado commercial construction market pricing sourced from RSMeans Building Construction Cost Data, local Colorado contractor bid data, and CBRE Colorado market reports.
- Location Index: Denver Metro = 1.00 (baseline); Mountain Resort areas (Aspen, Vail, Telluride) carry a 35% premium due to remote access, labor scarcity, and strict design review requirements; Rural Colorado reflects an 18% discount offset by mobilization costs.
- Quality tiers: Economy (0.80×) = basic code-compliant finishes; Standard (1.00×) = mid-grade commercial; Good (1.22×) = above-average finishes and systems; Premium (1.55×) = Class A / luxury finishes.
- Stories multiplier accounts for increased structural complexity, elevator requirements, and extended construction schedules for taller buildings.
- Foundation adders: Full basement adds ~$28/SF; deep foundations (piles/caissons) add ~$45/SF — common in areas with expansive soils (Front Range) or high water tables.
- Soft costs typically range 15–28% of hard costs and include architecture/engineering (A/E), permits and plan review fees, project management, owner's representative, legal, insurance, and FF&E allowance. Medical and school projects carry higher soft cost percentages due to regulatory complexity.
- Colorado-specific factors: High-altitude construction (above 8,000 ft) may add 5–15% to labor costs; seismic zone requirements in western Colorado; wildfire interface (WUI) code compliance in mountain communities; Colorado Energy Code (IECC 2021) compliance required statewide.
- Not included: Land acquisition, demolition, hazardous material abatement (asbestos/lead), off-site utility extensions exceeding 500 LF, extraordinary geotechnical conditions, public art requirements (1% for public projects), LEED/sustainability certification premiums, or escalation beyond Q4 2024.
- Accuracy: This tool provides a Class 5 / conceptual-level estimate (AACE International). Typical accuracy range is −15% to +30%. A detailed quantity takeoff by a licensed Colorado contractor or cost estimator is recommended before project financing.
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