The Quick Read: It depends on the size of the new loan. A conforming cash-out refinance fits when the new balance stays at or under your county’s limit, and a jumbo cash-out fits when the balance, or the cash you need, goes past it. Conforming follows published agency rules. Jumbo follows the rules of each wholesale lender, which gives it more room on leverage and loan size but requires more documentation and reserves.
The honest answer comes down to who each option serves. Conforming is built for the homeowner whose new loan fits under the county limit and whose equity covers the project at the home’s current value. Jumbo is built for the homeowner whose home value, existing balance, or project budget pushes the new loan past that line. Neither is “better.” The wrong choice is the one sized for a different project than yours.
One thing to know up front: both options generally lend on today’s appraised value, not the value after the work is done. That single fact shapes how much cash you can actually pull for a renovation or ADU.
Side-by-Side
| Factor | Conforming Cash-Out | Jumbo Cash-Out |
|---|---|---|
| Loan size | At or under county limit | Starts one dollar above it |
| Who sets the rules | Fannie Mae and Freddie Mac | Each wholesale lender |
| Leverage on a primary home | Capped at 80% on one unit | Up to 90% on the headline lane; cash-out sits lower |
| Credit floor | Set by agency and automated findings | 660 decision score on the headline lane |
| Mortgage insurance | Not used at this leverage | Described by lane; varies |
| Occupancy | Primary, second home, and others at lower caps | Primary, second home, investment at lane-specific leverage |
| Documentation | Standard agency file | Fuller file; reserves and appraisals scale with amount |
Read that table as a map, not a verdict. The jumbo column describes the wholesale lanes Lendmire’s brokerage places files with, subject to lender guidelines and full file review. Conforming figures come from Fannie Mae’s Eligibility Matrix, which caps a one-unit principal-residence cash-out at 80% and a 2–4 unit at 75%.
What “Conforming” Actually Means
Conforming means the loan is small enough for Fannie Mae or Freddie Mac to buy. The Federal Housing Finance Agency sets the limit each year. It is not one national number. A baseline applies in most counties, and high-cost counties get a higher ceiling, up to 150% of the baseline.
So check your county’s limit before you pick a lane. A loan that is jumbo in one county can be conforming in the next. And the limit applies to the new loan, not the cash you take out. A refinance replaces your whole first mortgage, so your existing balance plus the project money is what gets measured.
Don’t assume next year’s limit is already set. Some lenders advertise early figures, but the official number comes from FHFA.
How a Cash-Out Funds a Renovation or ADU
The mechanics are the same in both lanes. The new first mortgage pays off your existing loan, and the leftover equity arrives as cash. Under Fannie Mae’s cash-out rules, the existing first mortgage generally must be at least 12 months old, and the cash may be used for any purpose. That’s why you can fund a renovation or ADU without a special renovation product.
Here’s the catch. The appraisal sets the ceiling. A standard cash-out uses the home’s as-is value. The finished ADU or kitchen doesn’t raise what the lender will loan today. If the project is large relative to your equity, the cash-out may fall short.
Picture a homeowner with a paid-down mortgage and a home worth well above the county limit. The equity is plentiful, the project is modest, and the new balance still lands in jumbo territory. Conforming isn’t available, so the jumbo lane is the practical route. Now picture someone with a smaller balance in a moderate-cost county. The new loan fits under the limit even after adding the project budget. Conforming works, and it avoids the heavier documentation.
When Conforming Cash-Out Is the Better Fit
Conforming usually wins in four situations.
- The new loan stays under your county’s limit. If it does, you get a standardized, well-documented process.
- Your leverage need is 80% or below on a one-unit home. That is the conforming ceiling for a primary residence.
- Your file is straightforward. Agency underwriting rewards clean, documented income and credit.
- The project is within your as-is equity. Nothing about the lane helps if the budget outruns the appraisal.
Conforming also has a built-in alternative worth knowing. Fannie Mae’s HomeStyle Renovation product lends against the as-completed value, with a contractor, plans, and an as-completed appraisal. Work is due within 15 months, and the funds can’t be used to pay off existing debt. If your project is big and your as-is equity is thin, that structure may reach further than a plain cash-out. It carries more paperwork and oversight, so it fits a planned, contractor-led project better than a casual one.
The tradeoff to weigh: if you’re keeping a favorable existing mortgage, a cash-out replaces it entirely. A different tool, such as a home equity line, may leave the first loan untouched. Lendmire’s piece HELOC vs Renovation Loan vs Cash-Out Refinance for an ADU walks through that choice.
When Jumbo Cash-Out Is the Better Fit
Jumbo wins when size, not preference, decides the lane.
- The new balance exceeds your county’s conforming limit. Then conforming is off the table by definition.
- You need leverage above 80%. Wholesale jumbo lanes reach up to 90% on the headline lane, with several lanes at 89.99% CLTV and the rest stopping at 80%. Cash-out sits at lower leverage than purchase, and the largest lanes carry a cash cap. Everything here is subject to lender guidelines.
- You need a large loan. Loans run up to $5,000,000 on the largest lanes.
- Your file doesn’t fit the agency mold. Wholesale lenders set their own overlays, so some files that struggle in the agency box can work in a jumbo lane.
The Lendmire jumbo cash-out refinance program page covers the lane structures: fixed, adjustable, and interest-only. Credit starts at a 660 decision score on the headline lane. The ratio ceiling is 50% on the fixed lanes, 45% on the adjustable, and 43% on the interest-only. Reserves are measured in months of the full payment and rise with the loan amount. Above a lane’s threshold amount, expect two appraisals. Two lanes accept non-warrantable condominiums.
Across the wholesale programs Lendmire places files with, reserves and appraisal requirements are where jumbo borrowers get surprised. Plan for them early, not after the contract with the contractor is signed.
A jumbo loan is not unregulated, by the way. It still falls under the federal ability-to-repay framework, and the CFPB notes that jumbo loans must meet special requirements to be qualified loans.
The Appraisal Question Both Lanes Share
Ask every lender one question: will you lend on as-is value or as-completed value? Most cash-outs, conforming and jumbo, use as-is. A renovation-specific structure is the exception, and whether a jumbo lender offers one varies.
This matters most for an ADU. A detached unit you haven’t built yet adds nothing to today’s appraisal. And on a full cash-out, rental income from the planned ADU generally can’t be used to qualify. Fannie Mae allows ADU rent only in narrow cases, capped at 30% of qualifying income, per its Selling Guide. Plan on qualifying from your existing income.
When Neither Is Right
Be honest about the exits. If your current first mortgage is favorable, a full cash-out gives it up. If your project budget is uncertain, a lump sum at closing offers no draw control, and overruns come out of your pocket. If the project needs most of your equity, you may be borrowing against a home with little cushion left, and your home is the collateral. Costs also matter: origination, appraisal, and title expenses either reduce the cash you receive or add to the balance.
Another route is splitting the debt, keeping a conforming first loan and adding a second lien. Lendmire’s piece Conforming Cash-Out Plus a HELOC vs One Jumbo Cash-Out Refinance covers that tradeoff.
Tax treatment can depend on your situation; borrowers should speak with a qualified tax professional before relying on any deduction or credit.
Key Terms Defined
Conforming loan: A loan at or under the county limit that Fannie Mae or Freddie Mac can buy.
Jumbo loan: A loan that begins one dollar above the county’s conforming limit.
As-is value: What an appraiser says the home is worth today, before the project.
As-completed value: The projected value after the work is finished, used only by renovation-specific products.
CLTV: Combined loan-to-value, which counts all loans against the home’s value.
A Balanced Verdict
If your new loan fits under the county limit, your leverage need is 80% or less, and your equity covers the project today, conforming is usually the simpler path. If the balance crosses the line, you need more leverage, or the file needs lender flexibility, jumbo is the realistic path and the extra reserves and appraisal work come with it.
The flip point is the number on the new loan. Add your existing balance to your project budget, compare it to your county’s limit, then compare the cash you need to the equity the appraisal will support. That arithmetic tells you the lane before any lender does. If you are weighing a cash-out refinance against keeping the loan you have, Lendmire can help you compare the programs and the equity each one reaches.
Frequently Asked Questions
Can I use a cash-out refinance to build an ADU?
Yes, in either lane, because standard cash-out proceeds can be used for any purpose. The limit is equity: the lender lends against the home’s as-is value, not the finished ADU. If your equity doesn’t cover the build, a renovation-specific structure or a different tool may reach further.
Can I do a jumbo cash-out for a remodel?
Yes, when the new loan exceeds the county’s conforming limit and the file meets a jumbo lane’s guidelines. Leverage on cash-out sits below purchase leverage, and the largest lanes carry a cash cap. Reserves and appraisal requirements scale with the amount.
Will ADU rental income help me qualify?
Rarely on a full cash-out. Agency rules allow ADU rent in narrow cases, on one unit, capped at 30% of qualifying income. A planned ADU generally isn’t counted. Expect to qualify on your current income.
Is the conforming limit the same everywhere?
No. A baseline applies in most counties, and high-cost counties have a higher ceiling set by FHFA. Check your own county’s figure, because the same loan can be conforming in one place and jumbo in another.
Does a jumbo loan skip ability-to-repay rules?
No. Jumbo loans fall under the same federal ability-to-repay framework. They aren’t backed by the agencies, but the lender must still make a good-faith determination that you can repay. All program details are subject to lender guidelines and full file review, and nothing here is a commitment to lend.
For your own numbers, request a scenario review with Lendmire.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage broker licensed for consumer lending in 16 states. Lendmire arranges FHA, VA, conventional and jumbo purchase and refinance loans through wholesale lenders; every file is underwritten by the lender under the applicable program guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
For current guidelines, see jumbo loan programs.
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References
1. Fannie Mae Eligibility Matrix
2. FHFA: 2026 conforming loan limit values
3. Fannie Mae Selling Guide: Cash-Out Refinance Transactions
5. CFPB: What is a Qualified Mortgage?
6. Fannie Mae Selling Guide: Rental Income, Subject Property
This article is part of Lendmire’s Jumbo Loans series — every loan program’s qualification details, guidelines, and scenarios live on the loan options page.
Related reading: How to Compare Cash-Out Refinance Quotes Above the Conforming Limit · 5 Myths About Jumbo Cash-Out Refinance Costs and the Payment · Can a Retiree on Asset Income Get a Jumbo Cash-Out Refinance?
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Compliance and disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage broker and is not a direct lender, depository institution, financial advisor, or tax professional. Content in this article is general market analysis and educational information — not financial, legal, or tax advice for any specific situation. Lendmire does not guarantee loan approval; every transaction is subject to underwriting by the funding lender. Mortgage pricing and loan program guidelines are subject to change at any time without notice and vary by borrower characteristics, property type, and state regulations. Lendmire complies with Equal Housing Opportunity. Licensure verification: NMLS Consumer Access.