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Spec Home Profit Calculator

Enter your deal numbers below — land cost, construction cost, soft costs, holding, and expected sale price — to instantly see total project cost, gross profit, and a go/no-go margin indicator.

How to Use This Spec Home Profit Calculator

This free new construction feasibility calculator is designed for spec-build investors and small developers who need a fast, honest first-pass on whether a land deal pencils. Enter your lot or land cost, your hard construction cost (as a total or on a per-square-foot basis), soft costs as a percentage of hard cost (typically 6–12% for permits, architecture, title, and closing), holding and financing cost (interest carry, taxes, insurance, utilities for the build duration), and your expected after-repair value or sale price. The spec home profit calculator outputs total project cost, gross profit in dollars, and profit margin as a percentage—with a color-coded go/no-go indicator: green for ≥20% margin, yellow caution for 15–20%, and red no-go below 15%. Use it as a quick new construction feasibility calculator before spending time on detailed underwriting. For deeper analysis—sensitivity tables, financing structure, and a step-by-step spec build cost estimator—the $29 Deal Feasibility Toolkit includes the full working spreadsheet.