5.0 · 624 reviews · Jim Blackburn · NMLS #1072866
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Jumbo · Construction-to-Perm

Jumbo Ground-Up Construction: Payoff, Tear-Down & Build Calculator

Model a jumbo ground-up build with an existing payoff. Estimate total project costs, maximum jumbo loan by LTV, full monthly payment, cash to close, and the income needed to qualify.

Built by Jim Blackburn · NMLS #1072866 · $500M+ closed · 7× Scotsman Guide Top Producer

Primary uses 80% LTV; second home and spec use 75%.

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Existing loan / lot payoff.

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Permits, architectural, engineering.

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Labor and materials.

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Permanent rate after construction. Interest-only period runs ~3% higher during the build.

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Summary

Project Costs

Total Project Costs$1,480,000Payoff + renovation + 10% contingency.
Maximum Loan Amount Per (LTV)$2,400,000
12 Months Interest Reserves$239,760
Total Financeable Allowable Costs$1,764,160Includes ~3% estimated closing costs. Not a Loan Estimate.

Loan

Max Loan Amount$1,323,120Lesser of 75% of financeable costs or the LTV cap.

Payment Breakdown

Principal & Interest (Post-Construction)$8,794
Monthly Insurance$500
Monthly Taxes$1,000
HOA (paid separately)$0
Total Monthly Housing Expense$10,294

Cash to Close

Estimated Cash Out of Pocket$441,040
Monthly Income Target to Qualify$23,939Based on a 43% housing ratio.
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Estimates only — not a commitment to lend.

Jim Blackburn

By Jim Blackburn

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Important Disclaimer

This calculator is for illustrative purposes only and does not constitute financial, legal, or investment advice. Results are based on general assumptions and may not reflect actual performance or eligibility. This is not a loan estimate or approval. Please consult with a licensed mortgage advisor before making financial decisions.

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