Site Value Calculator

Site Value Calculator: Estimate Your Property's Worth :root { –primary-color: #004a99; –success-color: #28a745; –background-color: #f8f9fa; –text-color: #333; –border-color: #ddd; –card-background: #fff; –shadow: 0 2px 5px rgba(0,0,0,0.1); } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: var(–background-color); color: var(–text-color); line-height: 1.6; margin: 0; padding: 0; } .container { max-width: 960px; margin: 20px auto; padding: 20px; background-color: var(–card-background); border-radius: 8px; box-shadow: var(–shadow); } h1, h2, h3 { color: var(–primary-color); text-align: center; } h1 { margin-bottom: 10px; } .subtitle { text-align: center; color: #555; font-size: 1.1em; margin-bottom: 30px; } .calculator-section { margin-bottom: 40px; padding: 25px; border: 1px solid var(–border-color); border-radius: 8px; background-color: var(–card-background); box-shadow: var(–shadow); } .input-group { margin-bottom: 20px; text-align: left; } .input-group label { display: block; margin-bottom: 8px; font-weight: bold; color: var(–primary-color); } .input-group input[type="number"], .input-group input[type="text"], .input-group select { width: calc(100% – 22px); padding: 10px; border: 1px solid var(–border-color); border-radius: 4px; font-size: 1em; box-sizing: border-box; } .input-group .helper-text { font-size: 0.85em; color: #666; margin-top: 5px; display: block; } .error-message { color: red; font-size: 0.8em; margin-top: 5px; display: none; /* Hidden by default */ } .button-group { display: flex; justify-content: space-between; margin-top: 25px; } button { padding: 12px 20px; border: none; border-radius: 5px; cursor: pointer; font-size: 1em; font-weight: bold; transition: background-color 0.3s ease; } .btn-primary { background-color: var(–primary-color); color: white; } .btn-primary:hover { background-color: #003366; } .btn-secondary { background-color: #6c757d; color: white; } .btn-secondary:hover { background-color: #5a6268; } .btn-reset { background-color: #ffc107; color: #212529; } .btn-reset:hover { background-color: #e0a800; } .results-container { margin-top: 30px; padding: 20px; border: 1px solid var(–border-color); border-radius: 8px; background-color: var(–card-background); box-shadow: var(–shadow); } .results-container h3 { margin-top: 0; color: var(–primary-color); } .result-item { margin-bottom: 15px; font-size: 1.1em; } .result-item strong { color: var(–primary-color); } .primary-result { font-size: 1.8em; font-weight: bold; color: var(–success-color); background-color: #e9ecef; padding: 15px; border-radius: 5px; text-align: center; margin-bottom: 20px; } .formula-explanation { font-size: 0.95em; color: #555; margin-top: 15px; padding-top: 15px; border-top: 1px dashed var(–border-color); } table { width: 100%; border-collapse: collapse; margin-top: 20px; } th, td { border: 1px solid var(–border-color); padding: 10px; text-align: left; } th { background-color: var(–primary-color); color: white; } td { background-color: var(–card-background); } caption { font-size: 1.1em; font-weight: bold; color: var(–primary-color); margin-bottom: 10px; caption-side: top; text-align: left; } canvas { display: block; margin: 20px auto; max-width: 100%; border: 1px solid var(–border-color); border-radius: 4px; } .article-content { margin-top: 40px; padding: 25px; border: 1px solid var(–border-color); border-radius: 8px; background-color: var(–card-background); box-shadow: var(–shadow); } .article-content h2, .article-content h3 { text-align: left; margin-top: 25px; } .article-content p { margin-bottom: 15px; } .article-content ul, .article-content ol { margin-left: 20px; margin-bottom: 15px; } .article-content li { margin-bottom: 8px; } .faq-item { margin-bottom: 15px; } .faq-item strong { display: block; color: var(–primary-color); margin-bottom: 5px; } .internal-links ul { list-style: none; padding: 0; } .internal-links li { margin-bottom: 10px; } .internal-links a { color: var(–primary-color); text-decoration: none; font-weight: bold; } .internal-links a:hover { text-decoration: underline; } .internal-links span { font-size: 0.9em; color: #555; display: block; margin-top: 3px; } .highlight { background-color: #fff3cd; padding: 2px 4px; border-radius: 3px; } .text-center { text-align: center; } .text-primary { color: var(–primary-color); } .text-success { color: var(–success-color); } .bold { font-weight: bold; }

Site Value Calculator

Estimate the potential market value of your land based on key characteristics.

Site Value Calculator

Enter the total square footage of the land.
Research comparable land sales in your area.
1 (Low) to 10 (High) – consider zoning, utilities, access.
Multiplier for desirability (e.g., 1.2 for prime location, 0.8 for remote).
1 (Poor) to 5 (Excellent) – proximity to roads, utilities, public transport.

Your Site Value Estimate

Estimated Site Value: $0
Base Land Value: $0
Development Potential Adjustment: $0
Location & Infrastructure Adjustment: $0
Adjusted Market Price per Sq Ft: $0
Formula Used:

The estimated site value is calculated by first determining a base land value (Land Area * Average Market Price per Sq Ft). This base value is then adjusted by factors reflecting development potential and location/infrastructure advantages. The Development Potential Adjustment is a percentage of the base value, scaled by the development potential score. The Location & Infrastructure Adjustment is a multiplier derived from the location factor and infrastructure access score. Finally, the Adjusted Market Price per Sq Ft is calculated, and the Estimated Site Value is derived from this adjusted price and the land area.

Site Value Components
Component Value Unit
Land Area 0 sq ft
Average Market Price per Sq Ft 0 $
Base Land Value 0 $
Development Potential Score 0 (1-10)
Location Factor 0 (0.5-2.0)
Infrastructure Access Score 0 (1-5)
Adjusted Market Price per Sq Ft 0 $
Estimated Site Value $0 $
Site Value Factors Analysis

What is Site Value?

Site value, in the context of real estate and land appraisal, refers to the estimated market worth of a piece of land as if it were vacant and available for its highest and best use. It's a crucial metric for landowners, developers, investors, and even local governments. Understanding site value helps in making informed decisions regarding property transactions, development projects, taxation, and investment strategies. It's distinct from the value of any improvements (like buildings) that might be on the land; it focuses solely on the land itself.

Who should use a Site Value Calculator?

  • Property Owners: To understand the intrinsic worth of their land, especially before selling or considering development.
  • Real Estate Developers: To assess the feasibility and potential profitability of acquiring land for new projects.
  • Investors: To identify undervalued land assets or to gauge the potential return on investment for land holdings.
  • Appraisers and Agents: As a preliminary tool to support their professional valuations.
  • Local Governments: For property tax assessment purposes, ensuring fair taxation based on land potential.

Common Misconceptions about Site Value:

  • "Site value is just the purchase price." Not necessarily. Site value is an estimate of current market worth, which can fluctuate based on market conditions, zoning changes, and development trends, and may differ from the original purchase price.
  • "Site value includes existing buildings." This is incorrect. Site value specifically refers to the land itself, assuming it's vacant. The value of any structures is considered separately as 'improvement value'.
  • "Site value is fixed." Land value is dynamic. It's influenced by numerous external factors like economic growth, infrastructure development, zoning regulations, and environmental considerations.

Site Value Formula and Mathematical Explanation

Calculating site value involves several key components that adjust a base land valuation based on market comparables and specific site characteristics. The formula used in this calculator provides a robust estimate by considering these critical factors.

The core idea is to start with a baseline value derived from comparable sales and then apply multipliers or adjustments to account for factors that make a specific site more or less desirable or valuable.

Step-by-step derivation:

  1. Calculate Base Land Value: This is the foundational value of the land based on its size and the prevailing market rate per unit area.
    Base Land Value = Land Area × Average Market Price per Sq Ft
  2. Calculate Development Potential Adjustment: This factor quantifies how much the site's potential for development (e.g., building a house, commercial space) enhances its value. A higher score indicates greater potential, leading to a higher adjustment. We apply a percentage of the Base Land Value, scaled by the Development Potential Score.
    Development Potential Adjustment = Base Land Value × (Development Potential Score / 10) × 0.20 (Here, 0.20 represents a maximum potential uplift of 20% for a score of 10, adjustable based on market norms.)
  3. Calculate Location & Infrastructure Adjustment: This combines the influence of the site's location desirability and its access to essential infrastructure.
    Location & Infrastructure Adjustment = Base Land Value × ((Location Factor + (Infrastructure Access Score – 1) × 0.25) / 2) (Here, the infrastructure score is normalized, and combined with the location factor. The divisor '2' helps to moderate the overall impact.)
  4. Calculate Adjusted Market Price per Sq Ft: This represents the effective market rate per square foot after considering all site-specific advantages.
    Adjusted Market Price per Sq Ft = Average Market Price per Sq Ft × Location Factor × (1 + (Development Potential Score / 10) × 0.20) × (1 + ((Infrastructure Access Score – 1) × 0.25) / 2) (This formula integrates the location factor and scaled potential/infrastructure scores into the per-square-foot price.)
  5. Calculate Estimated Site Value: The final estimated value is derived from the adjusted price per square foot and the total land area.
    Estimated Site Value = Land Area × Adjusted Market Price per Sq Ft Alternatively, it can be seen as:
    Estimated Site Value = Base Land Value + Development Potential Adjustment + Location & Infrastructure Adjustment (Note: The calculator uses a simplified approach for clarity, focusing on the adjusted price per sq ft.)

Variable Explanations

Variable Meaning Unit Typical Range
Land Area The total surface area of the parcel of land. Square Feet (sq ft) 1,000 – 1,000,000+
Average Market Price per Sq Ft The typical price per square foot for comparable vacant land in the vicinity. Dollars ($) $10 – $500+ (highly variable by location)
Development Potential Score A subjective score reflecting the ease and suitability of developing the land (zoning, topography, permits). Score (1-10) 1 (Low) to 10 (High)
Location Factor A multiplier reflecting the desirability and accessibility of the site's location. Multiplier (0.5 – 2.0) 0.5 (Undesirable) to 2.0 (Prime)
Infrastructure Access Score A score indicating the quality and proximity of essential services (roads, utilities, public transport). Score (1-5) 1 (Poor) to 5 (Excellent)
Base Land Value The initial calculated value based purely on area and average market rate. Dollars ($) Calculated
Development Potential Adjustment The increase in value attributed to the land's development possibilities. Dollars ($) Calculated
Location & Infrastructure Adjustment The combined value adjustment from location and infrastructure factors. Dollars ($) Calculated
Adjusted Market Price per Sq Ft The effective market price per square foot after considering all site-specific factors. Dollars ($) Calculated
Estimated Site Value The final calculated market value of the vacant land. Dollars ($) Calculated

Practical Examples (Real-World Use Cases)

Let's explore how the Site Value Calculator can be applied in different scenarios.

Example 1: Residential Development Lot

Sarah owns a 5,000 sq ft lot in a growing suburban area. She's considering selling it and wants to know its potential value. The average price for similar vacant lots in her neighborhood is $60 per sq ft. Her lot has good zoning for single-family homes (Development Potential Score: 8), is close to a main road and has utility hookups nearby (Infrastructure Access Score: 4). The location is considered desirable but not prime (Location Factor: 1.1).

Inputs:

  • Land Area: 5,000 sq ft
  • Average Market Price per Sq Ft: $60
  • Development Potential Score: 8
  • Location Factor: 1.1
  • Infrastructure Access Score: 4

Calculation Breakdown:

  • Base Land Value = 5,000 sq ft * $60/sq ft = $300,000
  • Adjusted Market Price per Sq Ft = $60 * 1.1 * (1 + (8/10)*0.20) * (1 + ((4-1)*0.25)/2) = $60 * 1.1 * 1.16 * 1.375 = $101.65
  • Estimated Site Value = 5,000 sq ft * $101.65/sq ft = $508,250

Financial Interpretation: Sarah's lot is valued significantly higher than its base value due to its strong development potential and good infrastructure access, amplified by its desirable location. This estimate helps her set a realistic asking price.

Example 2: Commercial Land Parcel

A developer is evaluating a 2-acre parcel (87,120 sq ft) for a potential retail development. The area has seen recent commercial growth, with comparable land selling for $30 per sq ft. The site has excellent highway visibility and access (Location Factor: 1.5), and all major utilities are readily available (Infrastructure Access Score: 5). Zoning permits commercial use, and the topography is flat (Development Potential Score: 9).

Inputs:

  • Land Area: 87,120 sq ft
  • Average Market Price per Sq Ft: $30
  • Development Potential Score: 9
  • Location Factor: 1.5
  • Infrastructure Access Score: 5

Calculation Breakdown:

  • Base Land Value = 87,120 sq ft * $30/sq ft = $2,613,600
  • Adjusted Market Price per Sq Ft = $30 * 1.5 * (1 + (9/10)*0.20) * (1 + ((5-1)*0.25)/2) = $30 * 1.5 * 1.18 * 1.5 = $79.65
  • Estimated Site Value = 87,120 sq ft * $79.65/sq ft = $6,937,578

Financial Interpretation: The high location factor, excellent infrastructure, and strong development potential significantly increase the site's value per square foot, resulting in a substantial estimated site value. This justifies the developer's interest and potential investment. This calculation is a key part of any real estate investment analysis.

How to Use This Site Value Calculator

Using the Site Value Calculator is straightforward. Follow these steps to get an accurate estimate for your land:

  1. Input Land Area: Enter the total square footage of your property in the "Land Area (sq ft)" field. Ensure accuracy, as this is a primary driver of value.
  2. Determine Average Market Price per Sq Ft: Research recent sales of comparable vacant land parcels in your immediate area. Look at factors like size, zoning, and location. Enter this average price in the corresponding field. This requires due diligence and may involve consulting local real estate listings or agents.
  3. Assess Development Potential: Rate your site's suitability for development on a scale of 1 to 10. Consider factors like zoning regulations (what can be built?), ease of construction (topography, soil conditions), and required permits. A flat, properly zoned lot with easy permitting potential scores higher.
  4. Apply Location Factor: Use a multiplier between 0.5 and 2.0 to reflect how desirable and accessible your site's location is. A prime spot near amenities or transportation hubs gets a higher factor (e.g., 1.5), while a remote or less desirable area gets a lower one (e.g., 0.7).
  5. Score Infrastructure Access: Rate the site's access to essential utilities (water, sewer, electricity, gas) and transportation (roads, public transit) on a scale of 1 to 5. Excellent access scores a 5, while poor or non-existent access scores a 1.
  6. Calculate: Click the "Calculate Value" button.

How to Read Results:

  • Estimated Site Value: This is the primary output, representing the calculator's best estimate of your land's market worth.
  • Base Land Value: Shows the value derived solely from area and average market price, before adjustments.
  • Adjustments: The calculator breaks down how development potential and location/infrastructure factors influence the base value, showing the calculated dollar amounts or effective price per square foot.

Decision-Making Guidance: Use the estimated site value as a strong indicator for pricing your land if selling, negotiating a purchase price, or evaluating the financial viability of a development project. Remember this is an estimate; a professional appraisal may be necessary for critical decisions. Consider this value in conjunction with your overall property investment strategy.

Key Factors That Affect Site Value Results

Several critical factors influence the calculated site value, extending beyond the inputs directly entered into the calculator. Understanding these nuances is key to interpreting the results accurately.

  • Zoning and Land Use Regulations: Local government regulations dictate what can be built on a site. Favorable zoning for high-value uses (e.g., commercial, multi-family residential) significantly increases site value compared to restrictive zoning (e.g., agricultural, low-density residential). This is a primary component of the 'Development Potential Score'.
  • Market Conditions and Economic Trends: The overall health of the real estate market, local economic growth, job creation, and demand for specific types of property heavily influence land values. A booming economy typically drives up site values, while a downturn can depress them. This is reflected in the 'Average Market Price per Sq Ft'.
  • Location Desirability: Proximity to amenities like good schools, shopping centers, public transportation, parks, and employment hubs increases a site's appeal and value. Conversely, locations near undesirable elements (e.g., industrial zones, high crime areas) can decrease value. This is captured by the 'Location Factor'.
  • Infrastructure Availability and Quality: Access to essential utilities (water, sewer, electricity, gas, internet) and well-maintained transportation networks (roads, highways) is fundamental. Sites with readily available and high-quality infrastructure command higher prices. This is quantified by the 'Infrastructure Access Score'.
  • Topography and Environmental Factors: The physical characteristics of the land play a significant role. Flat, stable land suitable for easy construction is more valuable than steep, rocky, or flood-prone terrain. Environmental considerations, such as protected wetlands or soil contamination, can also negatively impact value. These often influence the 'Development Potential Score'.
  • Potential for Highest and Best Use: Appraisers determine site value based on its "highest and best use"—the most profitable legal use of the land. If a site is currently zoned for low-density housing but could legally accommodate a high-density apartment complex or commercial development, its site value will reflect that higher potential use. This is a core concept behind the 'Development Potential Score' and 'Location Factor'.
  • Property Taxes and Future Assessments: While not directly an input, the current and anticipated property tax burden can influence a buyer's willingness to pay a certain price. High taxes can sometimes moderate the effective price a buyer is willing to pay for the land.
  • Access and Frontage: Ease of access to the property, including road frontage and visibility, is crucial, especially for commercial or multi-family developments. Sites with prominent, easily accessible road frontage are generally more valuable. This ties into both 'Location Factor' and 'Infrastructure Access'.

Frequently Asked Questions (FAQ)

Q1: What is the difference between site value and market value?

Site value specifically refers to the value of the land itself, assuming it's vacant and ready for its highest and best use. Market value is the price a property would sell for on the open market, which includes both the site value and the value of any existing improvements (buildings, landscaping, etc.).

Q2: How accurate is this calculator?

This calculator provides an estimate based on the inputs provided and a standardized formula. Its accuracy depends heavily on the quality of your input data, especially the "Average Market Price per Sq Ft" and the subjective scores. For a definitive valuation, a professional appraisal by a licensed appraiser is recommended.

Q3: Can I use this calculator for agricultural land?

While the calculator can provide a baseline value, agricultural land often has specific valuation methods based on productivity, crop yields, and agricultural zoning. You might need to adjust the inputs or use specialized agricultural land valuation tools for a more accurate assessment. The 'Development Potential Score' would need careful consideration for its highest and best use.

Q4: What if my land has environmental issues?

Environmental issues like contamination or protected habitats can significantly reduce site value. You would need to reflect this by lowering the 'Development Potential Score' and potentially the 'Location Factor' to account for remediation costs or development restrictions. A professional environmental assessment might be necessary.

Q5: How do I find the "Average Market Price per Sq Ft"?

Research recent sales of comparable vacant land in your area. Check online real estate portals (like Zillow, Redfin, LoopNet for commercial), consult local real estate agents specializing in land, or review public records of recent property transactions. Ensure the comparables are similar in size, zoning, and location.

Q6: Does the calculator account for future development costs?

This calculator estimates the *current site value*, not the profitability of a future development. While factors like development potential and infrastructure access indirectly reflect ease of development, it doesn't calculate construction costs, financing costs, or potential profit margins. Those require a separate feasibility study or development pro forma.

Q7: What is the "Highest and Best Use" principle in land valuation?

This principle states that the value of a property is determined by its most profitable legal use. For vacant land, this means considering all potential legal uses (residential, commercial, industrial, recreational) and determining which one yields the highest market value. The calculator's 'Development Potential Score' and 'Location Factor' attempt to capture elements of this.

Q8: Can I use this for tax assessment appeals?

Yes, the estimate generated by this calculator can serve as supporting evidence when appealing a property tax assessment. However, official tax assessments often use different methodologies. It's advisable to consult with a tax professional or appraiser to ensure your appeal is well-supported with relevant data and formats. Understanding your property tax implications is crucial.

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var tableLocFactorTd = document.getElementById('tableLocFactor'); var tableInfraScoreTd = document.getElementById('tableInfraScore'); var tableAdjustedPriceTd = document.getElementById('tableAdjustedPrice'); var tableEstimatedValueTd = document.getElementById('tableEstimatedValue'); var chart; var chartContext; function formatCurrency(value) { return "$" + value.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,'); } function formatNumber(value) { return value.toFixed(2).replace(/\d(?=(\d{3})+\.)/g, '$&,'); } function validateInput(inputId, errorId, min, max, isRequired = true) { var input = document.getElementById(inputId); var errorSpan = document.getElementById(errorId); var value = parseFloat(input.value); var isValid = true; errorSpan.style.display = 'none'; input.style.borderColor = '#ddd'; if (isRequired && (input.value === " || isNaN(value))) { errorSpan.textContent = 'This field is required.'; errorSpan.style.display = 'block'; input.style.borderColor = 'red'; isValid = false; } else if (!isNaN(value)) { if (min !== null && value max) { errorSpan.textContent = 'Value cannot be more than ' + max + '.'; errorSpan.style.display = 'block'; input.style.borderColor = 'red'; isValid = false; } } return isValid; } function calculateSiteValue() { var isValid = true; isValid &= validateInput('landArea', 'landAreaError', 0, null); isValid &= validateInput('averagePricePerSqFt', 'averagePricePerSqFtError', 0, null); isValid &= validateInput('developmentPotential', 'developmentPotentialError', 1, 10); isValid &= validateInput('locationFactor', 'locationFactorError', 0.5, 2.0); isValid &= validateInput('infrastructureAccess', 'infrastructureAccessError', 1, 5); if (!isValid) { // Clear results if validation fails estimatedSiteValueSpan.textContent = '$0.00'; baseLandValueSpan.textContent = '$0.00'; developmentAdjustmentSpan.textContent = '$0.00'; locationInfrastructureAdjustmentSpan.textContent = '$0.00'; adjustedPricePerSqFtSpan.textContent = '$0.00'; updateTable(0, 0, 0, 0, 0, 0, 0, 0); updateChart([], [], [], [], []); return; } var landArea = parseFloat(landAreaInput.value); var averagePricePerSqFt = parseFloat(averagePricePerSqFtInput.value); var developmentPotential = parseFloat(developmentPotentialInput.value); var locationFactor = parseFloat(locationFactorInput.value); var infrastructureAccess = parseFloat(infrastructureAccessInput.value); // Constants for calculation adjustments (can be tuned) var devPotentialMultiplier = 0.20; // Max uplift percentage for score 10 var infraScoreNormalization = 0.25; // Value per point above 1 for infrastructure var infraScoreDivisor = 2.0; // Normalizing factor for infra/location combo // Calculations var baseLandValue = landArea * averagePricePerSqFt; // Development Potential Adjustment Calculation var devPotentialUplift = (developmentPotential / 10) * devPotentialMultiplier; var developmentAdjustment = baseLandValue * devPotentialUplift; // Location & Infrastructure Adjustment Calculation var normalizedInfraScore = (infrastructureAccess – 1) * infraScoreNormalization; var locationInfraCombinedFactor = (locationFactor + normalizedInfraScore) / infraScoreDivisor; var locationInfrastructureAdjustment = baseLandValue * (locationInfraCombinedFactor – 1); // Adjust relative to base // Adjusted Market Price per Sq Ft Calculation var adjustedPricePerSqFt = averagePricePerSqFt * locationFactor * (1 + devPotentialUplift) * (1 + (normalizedInfraScore / 2)); // Simplified combined effect // Estimated Site Value Calculation var estimatedSiteValue = landArea * adjustedPricePerSqFt; // Display Results estimatedSiteValueSpan.textContent = formatCurrency(estimatedSiteValue); baseLandValueSpan.textContent = formatCurrency(baseLandValue); developmentAdjustmentSpan.textContent = formatCurrency(developmentAdjustment); locationInfrastructureAdjustmentSpan.textContent = formatCurrency(locationInfrastructureAdjustment); adjustedPricePerSqFtSpan.textContent = formatCurrency(adjustedPricePerSqFt); // Update Table updateTable(landArea, averagePricePerSqFt, baseLandValue, developmentPotential, locationFactor, infrastructureAccess, adjustedPricePerSqFt, estimatedSiteValue); // Update Chart updateChart( ['Base Value', 'Dev Adj.', 'Loc/Infra Adj.', 'Total Est. Value'], [baseLandValue, developmentAdjustment, locationInfrastructureAdjustment, estimatedSiteValue], ['Adjusted Price/SqFt', 'Avg Price/SqFt'], [adjustedPricePerSqFt, averagePricePerSqFt] ); } function updateTable(landArea, avgPrice, baseValue, devScore, locFactor, infraScore, adjustedPrice, estimatedValue) { tableLandAreaTd.textContent = landArea.toLocaleString(); tableAvgPriceTd.textContent = formatCurrency(avgPrice); tableBaseValueTd.textContent = formatCurrency(baseValue); tableDevScoreTd.textContent = devScore; tableLocFactorTd.textContent = locFactor.toFixed(1); tableInfraScoreTd.textContent = infraScore; tableAdjustedPriceTd.textContent = formatCurrency(adjustedPrice); tableEstimatedValueTd.textContent = formatCurrency(estimatedValue); } function updateChart(labels1, data1, labels2, data2) { if (!chart) { chartContext = document.getElementById('siteValueChart').getContext('2d'); chart = new Chart(chartContext, { type: 'bar', data: { labels: labels1, datasets: [{ label: 'Value Components ($)', data: data1, backgroundColor: 'rgba(0, 74, 153, 0.6)', // Primary color borderColor: 'rgba(0, 74, 153, 1)', borderWidth: 1 }, { label: 'Price per Sq Ft ($)', data: data2, backgroundColor: 'rgba(40, 167, 69, 0.6)', // Success color borderColor: 'rgba(40, 167, 69, 1)', borderWidth: 1 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, ticks: { callback: function(value) { if (value % 1000000 === 0) return '$' + value.toLocaleString().slice(0, -6) + 'M'; if (value % 100000 === 0) return '$' + value.toLocaleString().slice(0, -3) + 'K'; if (value % 10000 === 0) return '$' + value.toLocaleString().slice(0, -1); return '$' + value.toLocaleString(); } } }, x: { ticks: { autoSkip: false } } }, plugins: { legend: { display: true, position: 'top', }, title: { display: true, text: 'Site Value Breakdown and Price Comparison' } } } }); } else { chart.data.labels = labels1; chart.data.datasets[0].data = data1; chart.data.datasets[1].data = data2; chart.options.plugins.legend.labels.generateLabels = function(chart) { var data = chart.data; if (data.datasets.length && data.labels.length) { return data.datasets.map(function(dataset, i) { return { text: dataset.label + ' (' + dataset.data[0].toLocaleString() + ')', // Display first value as example fillStyle: dataset.backgroundColor, strokeStyle: dataset.borderColor, lineWidth: dataset.borderWidth, hidden: !chart.isDatasetVisible(i), index: i }; }); } return []; }; chart.update(); } } function resetCalculator() { landAreaInput.value = '10000'; averagePricePerSqFtInput.value = '50'; developmentPotentialInput.value = '7'; locationFactorInput.value = '1.2'; infrastructureAccessInput.value = '4'; // Clear error messages document.getElementById('landAreaError').style.display = 'none'; document.getElementById('averagePricePerSqFtError').style.display = 'none'; document.getElementById('developmentPotentialError').style.display = 'none'; document.getElementById('locationFactorError').style.display = 'none'; document.getElementById('infrastructureAccessError').style.display = 'none'; document.querySelectorAll('.input-group input').forEach(function(input) { input.style.borderColor = '#ddd'; }); calculateSiteValue(); // Recalculate with default values } function copyResults() { var resultsText = "— Site Value Calculation Results —\n\n"; resultsText += "Estimated Site Value: " + estimatedSiteValueSpan.textContent + "\n"; resultsText += "Base Land Value: " + baseLandValueSpan.textContent + "\n"; resultsText += "Development Adjustment: " + developmentAdjustmentSpan.textContent + "\n"; resultsText += "Location & Infrastructure Adjustment: " + locationInfrastructureAdjustmentSpan.textContent + "\n"; resultsText += "Adjusted Market Price per Sq Ft: " + adjustedPricePerSqFtSpan.textContent + "\n\n"; resultsText += "— Key Assumptions —\n"; resultsText += "Land Area: " + landAreaInput.value + " sq ft\n"; resultsText += "Average Market Price per Sq Ft: $" + parseFloat(averagePricePerSqFtInput.value).toFixed(2) + "\n"; resultsText += "Development Potential Score: " + developmentPotentialInput.value + " (1-10)\n"; resultsText += "Location Factor: " + locationFactorInput.value + " (0.5-2.0)\n"; resultsText += "Infrastructure Access Score: " + infrastructureAccessInput.value + " (1-5)\n\n"; resultsText += "Formula: Site value is influenced by land area, average market price, development potential, location desirability, and infrastructure access.\n"; // Use a temporary textarea to copy text var textArea = document.createElement("textarea"); textArea.value = resultsText; textArea.style.position = "fixed"; textArea.style.left = "-9999px"; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'Results copied successfully!' : 'Failed to copy results.'; // Optionally display a temporary message to the user console.log(msg); } catch (err) { console.log('Unable to copy results.', err); } document.body.removeChild(textArea); } // Initial calculation on page load document.addEventListener('DOMContentLoaded', function() { calculateSiteValue(); // Initialize chart context if canvas exists if (document.getElementById('siteValueChart')) { chartContext = document.getElementById('siteValueChart').getContext('2d'); } });

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