Home Security System 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; } }

Home Security System Cost Estimator

Estimate your total home security system cost including equipment, installation, and annual monitoring fees based on your home size and security needs.

Home Size (sq ft)

Number of Entry Doors

Number of Windows

Number of Security Cameras

Monitoring Type

No Monitoring (Self-Monitored) Basic Professional Monitoring Standard Professional Monitoring Premium Professional Monitoring (24/7 + Smart Home)

Installation Type

DIY Installation Professional Installation

Smart Home Integration

No Yes (Smart locks, lights, thermostat)

Contract Length (Years)

1 Year 2 Years 3 Years 5 Years

Calculate

function homCalc() { // --- Gather inputs --- const homeSize = parseFloat(document.getElementById('hom-home-size').value); const numDoors = parseFloat(document.getElementById('hom-num-doors').value); const numWindows = parseFloat(document.getElementById('hom-num-windows').value); const numCameras = parseFloat(document.getElementById('hom-num-cameras').value); const monitoringType = document.getElementById('hom-monitoring-type').value; const installType = document.getElementById('hom-installation-type').value; const smartHome = document.getElementById('hom-smart-home').value; const contractYears = parseFloat(document.getElementById('hom-contract-years').value);

// --- Validation --- const errors = []; if (isNaN(homeSize) || homeSize 20000) errors.push("Home size must be between 200 and 20,000 sq ft."); if (isNaN(numDoors) || numDoors 20) errors.push("Number of entry doors must be between 1 and 20."); if (isNaN(numWindows) || numWindows 60) errors.push("Number of windows must be between 0 and 60."); if (isNaN(numCameras) || numCameras 30) errors.push("Number of cameras must be between 0 and 30.");

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

// ───────────────────────────────────────────── // EQUIPMENT COSTS // ───────────────────────────────────────────── // Control panel / hub const controlPanelCost = 150;

// Door/window sensors: $20 per door sensor, $15 per window sensor const doorSensorCost = numDoors * 20; const windowSensorCost = numWindows * 15;

// Motion detectors: 1 per 500 sq ft, $35 each const numMotionDetectors = Math.ceil(homeSize / 500); const motionDetectorCost = numMotionDetectors * 35;

// Cameras: $80 per indoor, assume 60% outdoor ($120 each), 40% indoor ($60 each) const numOutdoorCameras = Math.round(numCameras * 0.6); const numIndoorCameras = numCameras - numOutdoorCameras; const cameraCost = (numOutdoorCameras * 120) + (numIndoorCameras * 60);

// Siren / alarm: $40 flat const sirenCost = 40;

// Keypad: $60 per door (one keypad per entry door) const keypadCost = numDoors * 60;

// Smart home add-on: $300 flat for hub + 2 smart devices baseline const smartHomeCost = (smartHome === 'yes') ? 300 : 0;

const totalEquipmentCost = controlPanelCost + doorSensorCost + windowSensorCost + motionDetectorCost + cameraCost + sirenCost + keypadCost + smartHomeCost;

// ───────────────────────────────────────────── // INSTALLATION COST // ───────────────────────────────────────────── // Professional: $85/hr base + $10 per sensor/camera device // DIY: $0 labor, but assume $20 for tools/supplies let installationCost = 0; const totalDevices = numDoors + numWindows + numMotionDetectors + numCameras; if (installType === 'professional') { const laborHours = 2 + (totalDevices * 0.25); // 2 base hours + 15 min per device installationCost = laborHours * 85; } else { installationCost = 20; // DIY supplies }

// ───────────────────────────────────────────── // MONITORING COST (annual) // ───────────────────────────────────────────── // none: $0/mo, basic: $15/mo, standard: $30/mo, premium: $50/mo const monthlyMonitoringRates = { none: 0, basic: 15, standard: 30, premium: 50 }; const monthlyMonitoring = monthlyMonitoringRates[monitoringType]; const annualMonitoringCost = monthlyMonitoring * 12;

// ───────────────────────────────────────────── // TOTALS // ───────────────────────────────────────────── const upfrontCost = totalEquipmentCost + installationCost; const totalMonitoringCost = annualMonitoringCost * contractYears; const totalCostOverContract = upfrontCost + totalMonitoringCost; const monthlyCostAverage = totalCostOverContract / (contractYears * 12);

// ───────────────────────────────────────────── // RENDER // ───────────────────────────────────────────── const monitoringLabels = { none: 'None (Self-Monitored)', basic: 'Basic Professional', standard: 'Standard Professional', premium: 'Premium Professional' };

resultDiv.style.display = 'block'; resultDiv.innerHTML = ` ### Your Home Security Cost Estimate

Cost CategoryAmount

Equipment Costs Control Panel / Hub$${controlPanelCost.toFixed(2)} Door Sensors (${numDoors} × $20)$${doorSensorCost.toFixed(2)} Window Sensors (${numWindows} × $15)$${windowSensorCost.toFixed(2)} Motion Detectors (${numMotionDetectors} × $35)$${motionDetectorCost.toFixed(2)} Cameras (${numOutdoorCameras} outdoor × $120 + ${numIndoorCameras} indoor × $60)$${cameraCost.toFixed(2)} Siren / Alarm$${sirenCost.toFixed(2)} Keypads (${numDoors} × $60)$${keypadCost.toFixed(2)} ${smartHome === 'yes' ? Smart Home Integration$${smartHomeCost.toFixed(2)} : ''} Total Equipment$${totalEquipmentCost.toFixed(2)}

Installation ${installType === 'professional' ? 'Professional Labor' : 'DIY Supplies'}$${installationCost.toFixed(2)}

Monitoring (${monitoringLabels[monitoringType]}) Monthly Fee$${monthlyMonitoring.toFixed(2)}/mo Annual Cost$${annualMonitoringCost.toFixed(2)}/yr Total Over ${contractYears}-Year Contract$${totalMonitoringCost.toFixed(2)}

Upfront Cost (Equipment + Installation) $${upfrontCost.toFixed(2)}

Total Monitoring Over ${contractYears} Year(s) $${totalMonitoringCost.toFixed(2)}

Total ${contractYears}-Year Cost $${totalCostOverContract.toFixed(2)}

Average Monthly Cost (all-in) $${monthlyCostAverage.toFixed(2)}/mo

`; }

#### Formulas Used

Equipment Cost:

Installation Cost (Professional): (2 + Total Devices × 0.25) hours × $85/hr

Installation Cost (DIY): $20 (supplies)

Annual Monitoring: Monthly Rate × 12 — Rates: None=$0, Basic=$15, Standard=$30, Premium=$50/mo

Total Contract Cost: (Equipment + Installation) + (Annual Monitoring × Contract Years)

Average Monthly Cost: Total Contract Cost ÷ (Contract Years × 12)

#### Assumptions & References

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