Jumbo Construction Loans: How to Finance a High-Value Custom Home

A jumbo construction loan is a construction-to-permanent loan for a loan amount above the conforming loan limit set each year by the Federal Housing Finance Agency (FHFA). It pays your builder in stages while the home goes up, then becomes a long-term mortgage once the home is finished. Because the loan is too large for Fannie Mae or Freddie Mac to buy, the lender sets its own, usually stricter, guidelines.

If you're building a custom home and already own your land or have strong savings, here's what to know before you talk to lenders.

What makes a construction loan "jumbo"?

It's the loan amount, not the price of the home. Fannie Mae and Freddie Mac can only buy mortgages up to the conforming loan limit, and loans above that line are called jumbo loans.

FHFA updates the conforming loan limit annually. Most of the country uses a baseline limit, higher-cost counties have higher limits, and Alaska, Hawaii, Guam, and the U.S. Virgin Islands have their own. Jumbo loans are larger than the conforming loan limit for your county, and you can look up your county's current limit on FHFA's conforming loan limit page.

That means a custom home in a pricier county isn't automatically jumbo. If your land equity or cash keeps the loan at or below your county's limit, you may have conforming options instead. A lender can run both scenarios.

Might your loan be conforming instead? Our video Conventional Construction Loans: What Lenders Look For explains what lenders review for you, your builder, and your project.

Typical jumbo construction loan requirements

Every lender sets its own rules, and construction adds a layer of risk, so expect a closer look than on a standard purchase. Common guidelines include:

• Credit: Jumbo lenders usually look for strong credit, and standards often tighten as loan size grows. Requirements vary by lender.
• Reserves: Lenders often want to see meaningful savings or investments left over after closing. Larger loans typically require more, and the exact requirement varies by lender.
• Debt-to-income ratio (DTI): Lenders compare your debts to your income to make sure the new loan fits your budget. Limits vary by lender, and some allow more flexibility with strong credit and reserves.
• Down payment: Jumbo construction loans typically call for more equity than conforming loans. The exact amount depends on the lender, loan size, and property, so ask early.
• Documentation: Expect full income and asset documentation. Self-employed borrowers are often asked for recent tax returns and business financial statements.

These are general patterns, not approval criteria. Your own requirements depend on the lender and your full financial picture.

One-time close vs. two-time close

With a one-time close loan, you sign once, before construction starts. The construction phase and the permanent mortgage are part of the same loan, and it converts automatically when the home is complete. That means one set of closing costs and no second loan application at the end, though lenders may update or re-verify credit, income, or employment documents before conversion.

With a two-time close loan, you close a construction-only loan first, then close a separate permanent mortgage when the home is done. This can offer flexibility if you want to shop the permanent loan later, but it means a second application, a second closing, and qualifying again, which carries risk if your income or the market changes during the build.

Either way, the home generally has to be fully finished before you convert to the permanent mortgage, including a final inspection and certificate of occupancy.

Prefer to watch? Our video How Do Jumbo Construction Loans Work for a Custom Home? walks through how jumbo construction loans are structured, what lenders look for in you and your builder, the custom-home appraisal, and how to protect your budget.

Using land equity toward your down payment

If you already own your lot, its value can often count toward your down payment. Lenders typically use the land's appraised value or what you paid for it, depending on how long you've owned it, along with any balance still owed on it.

For example, if you own the land free and clear, much or all of your required equity may already be covered. If you still have a lot loan, it's usually paid off at closing as part of the new construction loan. Keep your land deed, purchase records, and any payoff statement handy.

Builder approval and the draw schedule

Lenders don't just approve you. They approve your builder and your project, too. Most jumbo construction lenders require a licensed, insured, lender-approved builder with a solid track record on homes of similar size and complexity. Expect the lender to review the builder's license, insurance, references, and financials.

Instead of paying the builder up front, the lender releases funds in stages through a draw schedule tied to milestones such as foundation, framing, and roof. Before each draw, an inspector typically confirms the work is done. Many lenders also require a contingency reserve to cover overruns, which is especially important on custom homes with high-end finishes.

Appraisal on plans and specs

Since the home doesn't exist yet, the appraiser estimates its "as-completed" value from your plans, specifications, and building contract, plus comparable sales nearby. On high-value custom homes, finding true comparables can be tricky, especially for unique designs or rural lots.

If the appraisal comes in below your total project cost, you may need to cover the gap with more cash or adjust the plans. A detailed spec sheet and a realistic budget give the appraiser the best information to work with.

Tips to prepare for a jumbo construction loan

• Look up your county's limit first. Know whether your loan amount is likely jumbo before you start shopping.
• Run the numbers early. Use a construction cost and affordability calculator to estimate your total project budget, including land, soft costs, and contingency.
• Gather documents. Tax returns, pay stubs or business financials, asset statements, and land records will speed things up.
• Line up your builder. Ask whether they've worked with construction lenders and draw schedules before.
• Finalize plans and specs. The more complete your plans, the smoother the appraisal and underwriting.
• Keep your finances steady. Avoid new debt or large unexplained deposits during the process.

Frequently asked questions

What is a jumbo construction loan?

It's a construction-to-permanent loan for a loan amount above the FHFA conforming loan limit for your county. It funds the build in stages, then becomes a long-term mortgage when the home is finished.

How do I know if my construction loan will be jumbo?

Compare your expected loan amount with the conforming loan limit for your county. FHFA updates these limits annually, and loans above your county's limit are considered jumbo. Check FHFA's site for your county's current limit.

Can I use land I already own toward my down payment?

Often, yes. Many lenders count the equity in land you own toward the required down payment, based on its appraised value or purchase price and any balance you still owe.

Is a one-time close jumbo construction loan better than a two-time close?

It depends on your goals. A one-time close means one closing, though your lender may update or re-verify documents before conversion, while a two-time close may offer more flexibility on the permanent loan but requires qualifying twice.

Do jumbo construction loans require a specific builder?

Most lenders require a licensed, insured builder they've reviewed and approved. Owner-builder projects are usually not allowed on jumbo construction loans.

Ready to plan your custom build?

A jumbo construction loan has more moving parts than a standard mortgage, but with the right preparation it can be a smooth path from lot to keys. If you'd like to talk with a construction lender, we'll connect you with lenders who work with builds like yours. Get connected with a construction lender at My Construction Path.

My Construction Path is not a lender and does not make loans or credit decisions. We connect you with lenders who may be able to help. Not all borrowers will qualify. Equal Housing Opportunity. Requirements vary by lender, loan program, and location. This article is for general education and is not a commitment to lend. Conforming loan limits are set by FHFA and may change annually.