Enter land and construction cost
Use the expected lot acquisition cost and the construction budget for the project.
Build-to-sell investment analysis
Florida Construction Investment Calculator
Model a Florida construction project by combining land cost, construction cost, expected sale price, selling costs and optional construction financing.
How it works
How to use this calculator
Use the construction calculator to test a simplified build-to-sell scenario and compare an all-cash project with a leveraged construction-financing scenario.
Enter expected sale price and selling cost
Model the expected exit value and the percentage of sale proceeds consumed by selling costs.
Turn on construction financing if needed
Set loan-to-cost, interest rate and project duration to estimate financing interest and required equity.
Compare profit, ROI and leverage
Review the all-cash result alongside the financed scenario to understand the trade-off between financing cost and capital efficiency.
Calculator
Run your scenario
Adjust the inputs below and the results will update automatically.
Illustrative estimate only. Results vary by rates, costs, market conditions, property and strategy. Not financial, tax, legal, lending or investment advice.
Understanding your results
How to interpret the numbers
Construction returns are highly sensitive to cost overruns, timeline and sale price. The calculator is designed for scenario comparison, not as a project budget or lender underwriting model.
Total base cost
Lot cost plus construction cost before selling expenses and financing interest.
Net profit — all cash
Expected sale price minus base cost and modeled selling costs.
ROI — all cash
Modeled net profit divided by land plus construction cost.
Return on equity — leveraged
Modeled financed-project profit divided by estimated equity required in the simplified leverage scenario.
Calculation methodology
How the key metrics are calculated
The financing scenario uses a simplified interest assumption based on an average outstanding construction balance. Real construction loans may fund through draws and carry additional lender fees.
Base project cost
The current calculator treats these two inputs as the project cost base.
Land + construction
Selling costs
Selling costs are deducted from projected sale proceeds.
Sale price × selling-cost %
Net profit — all cash
This is the simplified projected profit before income taxes and other costs not entered in the model.
Sale price − base cost − selling costs
ROI — all cash
Shows profit relative to the land and construction capital modeled.
Net profit ÷ base project cost
Florida-specific considerations
What to consider before making a Florida decision
Florida construction projects should be analyzed with local permitting, insurance, labor, material, impact-fee and market-exit assumptions rather than statewide averages.
Confirm zoning, setbacks, utilities, permitting requirements and impact fees before treating a lot as buildable for the intended project.
Use contractor bids and contingencies rather than relying only on a broad cost-per-square-foot estimate.
Carry costs can include construction insurance, property tax, utilities, interest, inspections and lender fees during the project.
Exit value should be supported by current comparable sales and adjusted for the expected completion date and product type.
Frequently asked questions
Questions about this calculator
What costs should be included in construction?
At minimum, consider land, construction, soft costs, permits, financing, insurance, utilities, contingency, holding costs and selling costs.
What is construction ROI?
In this tool, ROI compares estimated project profit with the project cost before financing.
How is leverage modeled?
The leveraged scenario uses loan-to-cost, interest rate and project duration to estimate financing cost and equity return.
Is this a contractor or lender quote?
No. It is an investment-planning estimate and should be validated with actual bids, lender terms and transaction costs.
FLEXPRO Consulting
Want to turn the simulation into a property-specific analysis?
FLEXPRO can help organize assumptions, costs, location considerations and next steps for a more informed Florida real estate decision.