Jumbo
construction loans

Overview

This guide covers jumbo loan programs for new construction — including how these programs work, what lenders look for, and how to get started. Qualification requirements vary by lender and program type. All loan programs are subject to credit approval and lender-specific criteria.

• Program availability varies by lender
• Qualification requirements vary by scenario
• Multiple program types available
• Speak with a licensed MLO for your situation

Getting Started

JumboLoan.com works with wholesale and portfolio lenders to provide access to programs not available at retail banks. Start our AI-assisted application or call us to discuss your scenario — a licensed MLO will identify the programs best suited to your situation.

• Start at AIMortgageApplication.com
• Licensed MLO reviews your scenario
• Multiple programs compared simultaneously
• NMLS# 1967971 — verify at NMLSConsumerAccess.org

Where construction lending meets jumbo scale

A jumbo construction loan finances a custom build whose total funding — land plus construction — exceeds the conforming limit ($832,750 in most 2026 counties). At this scale the product leaves the standardized world entirely: agency-eligible construction programs cap out, and the market becomes portfolio lenders, private banks, and specialty construction investors, each with its own appetite. Luxury custom homes, waterfront builds, estate compounds, and major teardown-rebuilds in premium neighborhoods all live here — projects where budgets run $1.5M to $10M+ and the underwriting is genuinely bespoke.

Everything true of construction lending generally — draws, inspections, builder vetting, interest on drawn funds — applies, tightened for scale.

How jumbo construction underwriting tightens

• Equity: expect 20–30%+ of total project cost, with land equity counting; leverage falls as budgets rise.
• Reserves: 12+ months of the eventual payment is common, and some lenders want visible liquidity approaching a meaningful share of the build budget — cost overruns at luxury scale are absorbed by borrowers, not lenders.
• Builder scrutiny at its peak: lenders want contractors with a track record at this price point — a superb $600K-home builder is not automatically fundable on a $4M build.
• Appraisal complexity: the completed value must be supported by luxury comparables, which are scarce; expect detailed review and, on large balances, second appraisals.
• Contingency: 10% is the credible minimum at this scale; luxury finishes and long timelines amplify overrun risk.

The compensation for all this rigor: portfolio lenders can be remarkably flexible on structure — interest-only permanents, cross-collateralization, asset-based qualifying — once the project itself convinces them.

How large custom builds get priced: pricing levers & SBLOC alternatives

Pricing multi-million dollar construction loans involves dynamics unique to private capital:

• Lender rate dispersion: Quotes on the same $2M–$5M+ custom build file can spread by over 1.00% across portfolio lenders depending on their immediate liquidity appetite and construction risk exposure.
• Key pricing levers: Equity past 25%–30% LTC, credit tiers at 740+, deep verified post-closing liquidity reserves, and builder portfolio credentials directly drive interest discounts.
• Private bank relationship discounts: Many private banks provide preferential rate concessions when borrowers move deposits or assets under management (AUM).
• Securities-based lines (SBLOC) vs. construction loans: Some high-net-worth clients consider funding construction via securities lines against investment portfolios to bypass draw inspections. However, this exposes liquid assets to market volatility and collateral calls, whereas a dedicated construction loan ring-fences market risk into the real property.

Structuring the large build well

The decisive choices are the same as any construction loan, with bigger consequences: one-time-close (locking a jumbo permanent rate before a 14-month build is meaningful insurance) versus two-close (freedom to shop a $3M permanent loan is worth real money); interest-reserve sizing on a long luxury timeline; and lender selection, where the spread between the right portfolio lender and the wrong one is measured in whole points of cost and months of friction. Jumbo construction is placement-intensive lending — precisely the work a specialized broker exists for. New Century Financial Mortgage, LLC, NMLS# 1967971.

Quick answers

Do jumbo construction loans require two appraisals?

Above certain balances, many programs do — or one appraisal plus a desk review. Scarce luxury comps make the collateral file the hardest part of some approvals.

Can my architect's fees count toward equity?

Soft costs already paid often credit toward the project's equity math — keep invoices and proof of payment; they are real money in the file.