The Quick Read: A cash-out refinance suits a homeowner with plenty of equity who wants a lump sum, few strings and a build already priced by contractors. A renovation loan suits a homeowner who wants the borrowing sized on the finished value, with the money held in escrow and released as the work gets done. Neither is required for an ADU. One option that looks like it should work, the limited cash-out refinance, usually will not.
Key Takeaways
- An accessory dwelling unit (ADU) can be financed with several loan types. Fannie Mae says no specific type of financing is required.
- A cash-out refinance sizes the loan on today’s appraised value. A renovation loan sizes it on the as-completed value.
- A cash-out refinance hands you the money at closing. A renovation loan holds it in escrow and releases it as the work is completed.
- Each of these replaces your current first mortgage with a new one, so each resets your term.
- A rate-and-term (limited cash-out) refinance is built for incidental cash back only. It is not a construction fund.
Side-by-Side
| Factor | Cash-Out Refinance | Renovation Loan |
|---|---|---|
| Value used for sizing | Current appraised value | As-completed appraised value |
| Leverage | 80% LTV one-unit primary; 75% on 2-4 units | Set by program; based on finished value |
| Credit floor | 620 decision score on wholesale conforming | Program floor plus lender overlays |
| Occupancy | Occupancy sets the leverage | Set by program and lender |
| How funds arrive | One lump sum at closing | Escrow, released as work is done |
| Documentation | Standard refinance file | Adds plans, contractor review, special appraisal |
| ADU type limits | Few product-level limits | Vary: FHA 203(k) needs an attached ADU |
Mortgage insurance is required above 80% LTV on the agency path, except in the wholesale no-MI cash-out lane, which reaches 89.99% LTV at a 680 score with a 50% ratio on a thirty-year fixed, primary residence, conforming balance. On the agency path, you can ask to cancel at 80% of the original value, and the servicer must end it at 78%. Terms depend on the lender’s guidelines, the property type, the leverage, and a full review of the credit profile.
Cash-out refinance estimate
The starting figures are an example value with a balance and a cash request in proportion. Replace them with yours.
Editable benchmark: 7.18% as of November 5, 2026 · Freddie Mac 30-year average via FRED®. A conventional market reference, not a cash-out refinance quote.
Illustrative starting assumptions: a $350,000 home value, a $193,000 current balance, the agency cap on a one-unit principal residence, a thirty-year term at the current Freddie Mac benchmark, and property taxes and insurance estimated at typical national rates. Every field is editable.
Illustrative estimate only — not a Loan Estimate, approval, quote, or commitment to lend. The rate field carries the weekly Freddie Mac thirty-year conventional benchmark, a market reference and not a cash-out refinance quote; a cash-out loan is priced by the lender at lock. The cash available is the loan the program cap allows less the balances paid off, before closing costs, which are not included. The HELOC line is the program’s combined loan-to-value ceiling applied to the same value and balance. Taxes and insurance are editable estimates. Licensed in sixteen states for consumer mortgages.
Notice what the table leaves out: price. That is on purpose. Compare the Loan Estimates side by side before you decide.
Key Terms Defined
ADU (accessory dwelling unit): A separate living space on your property, such as a backyard cottage, a garage conversion or an attached in-law suite.
Cash-out refinance: A new first mortgage that pays off your old one and gives you the leftover equity as cash.
Renovation loan: A mortgage that bundles the cost of the work into the loan and holds the renovation money until the work is done.
As-completed value: The appraiser’s estimate of what your home will be worth once the project is finished.
Escrow draw: A release of held renovation money to pay for work that has been completed.
Contingency reserve: Extra money set aside inside a renovation loan to cover overruns.
Seasoning: The minimum age of your current loan, or time on title, before a lender will write a cash-out.
Why the Limited Cash-Out Refinance Is Not the Answer
A limited cash-out refinance, a type of refinance, pays off your current first mortgage and your closing costs. It allows only incidental cash back. At Fannie Mae, that is the lesser of 2% of the new loan amount or $2,000. At Freddie Mac, it is the greater of 1% of the new loan amount or $2,000.
That is not construction money. Fannie Mae’s limited cash-out rules treat cash back as small by design. If the ADU needs a lump sum, you are looking at a full cash-out refinance or a renovation product.
When a Cash-Out Refinance Is the Better Fit
A cash-out refinance is the better fit when you have deep equity today, a firm budget and a preference for simplicity. You get the proceeds at closing and spend them as you see fit. On the wholesale programs Lendmire places, the underwriting looks at equity, credit, income and ratios. The current appraised value sets the ceiling.
The program picture is straightforward. A cash-out on a one-unit primary residence runs to 80% LTV, and 75% on two- to four-unit primary residences. A decision score of 620 is where the wholesale conventional programs start, subject to lender guidelines. Your current first mortgage must be at least 12 months old, measured note date to note date. You must also have been on title for 6 months, with exceptions for delayed financing, inheritance and legal awards.
A separate wholesale lane reaches 89.99% LTV with no mortgage insurance, at a 680 score and a 50% ratio on a thirty-year fixed rate. It applies only to a primary residence at a conforming balance, and it has its own six months of seasoning in place of the 12-month and 6-month tests above. It is the one lane where borrowers get past 80% without mortgage insurance.
Three situations point toward cash-out:
- Your equity already covers the project. Because the loan is sized on today’s value, the ADU’s added value does not have to carry the deal. This works best when the build is modest relative to what the home is worth now.
- You want contractor freedom and a simple closing. A cash-out has no renovation agreement, no draw schedule and no plan review layered onto the file. If you already have a contractor and permits in hand, that simplicity is real.
- The project is already underway or paid for. If you funded early costs out of pocket, a cash-out can reimburse you. Freddie Mac also describes a narrow route in which a renovation-type refinance pays off short-term financing for ADU work finished before the note date, per its ADU fact sheet. That is an edge case with conditions, so ask before counting on it.
Now the risks. A lump sum puts budget discipline on you. Nobody holds the money back if the project stalls. And you are borrowing against value that exists today, not value the ADU will add. If the home’s current equity is thin, cash-out may not reach the build at all.
Lendmire’s cash-out refinance programs page lays out how the wholesale network handles leverage by occupancy and property type.
When a Renovation Loan Is the Better Fit
A renovation loan is the better fit when the ADU will add a lot of value and your equity today does not reach the full cost. The core feature is the as-completed appraisal. The lender orders an appraisal that estimates the home’s value with the ADU finished, and that figure drives the maximum loan. For limited cash-out versions of the product, Fannie Mae bases LTV on the as-completed value, per its announcement on renovation changes.
Here is how the mechanics run on Fannie Mae’s HomeStyle Renovation, the agency’s route for refinancing a one-unit home and adding an ADU:
1. You pick a contractor and submit plans. The lender reviews that the project meets program requirements. Fannie Mae says there is no minimum project size, and any contractor can be used, subject to lender review.
2. The as-completed appraisal sets your maximum loan.
3. At closing, you sign a renovation agreement. The renovation money goes into a held account instead of your hands.
4. Funds are released as work is completed. Lenders may now release part of the renovation budget at closing.
5. Unused contingency money, unless it came directly from you, reduces your loan balance after completion.
Freddie Mac’s version is CHOICERenovation. Freddie Mac allows ADU financing through all its mortgage offerings, and its renovation product can add a new ADU or renovate an existing one.
Why pick this route? Three reasons.
- Thin equity today, strong value after. A cash-out sized on current value can fall short. The as-completed basis can reach further.
- You want a built-in discipline check. Held funds and inspections protect you from paying for work that is not finished.
- You want one loan, not a first plus a second. Fannie Mae describes HomeStyle as financing renovations with a first mortgage in one closing instead of adding a second lien or home equity line.
The costs are real, though. You add plan review, contractor review, a specialized appraisal and inspections. Not every lender offers renovation products, so the field of lenders narrows. Expect more paperwork, and expect the file to depend on a contractor you have not yet chosen.
Some borrowers also benefit from a payment reserve. If the home is not livable during construction, the program allows financing a few months of housing payments. Fannie Mae does not require the property to be habitable at closing.
The FHA Wrinkle
If you or your lender are weighing FHA’s 203(k), know the ADU rule. HUD’s program comparison sheet says the ADU must be attached to the existing structure. A detached backyard cottage is a Fannie Mae or Freddie Mac conversation, not an FHA one. Standard 203(k) loans also require a HUD consultant, which adds a cost and a step. The home generally has to be at least a year old.
One more FHA point: the FHA Streamline and the VA IRRRL are no-new-cash products for existing government loans. They are not built to fund construction. If you hold an FHA or VA loan and want an ADU, those streamlines will not deliver the money.
ADU Details That Can Change the Answer
Property type matters. Freddie Mac allows one ADU on one- to three-unit properties. Fannie Mae’s eligibility has shifted over time and varies by unit count, so the current Selling Guide governs. Properties with multiple ADUs are generally ineligible at Fannie Mae.
Zoning matters, too. Freddie Mac requires the ADU’s zoning status to be legal, legal non-conforming, or no zoning at all, with a narrow exception for one-unit properties. In plain words: if the city will not permit the unit, the lender will not finance it. Get the permit path settled before you apply, because an unpermitted unit can stop the file entirely.
Then there is rental income. Freddie Mac says income from an ADU can count toward qualifying when its requirements are met. FHA policy also allows it in some cases. Treat that as a possible help, never a promise. Documentation requirements depend on property type and program.
A Walk-Through: The Same Project, Two Paths
Picture a homeowner with a one-unit primary residence and a first mortgage well past its first birthday. She wants a detached backyard cottage. She has solid equity, though not enough to cover the build on today’s value alone.
Path one, cash-out. The lender orders a standard appraisal. The loan is sized on current value, capped at 80% LTV on a one-unit primary. If the proceeds cover the build, she closes, receives a lump sum and pays her contractor as the work moves. If the proceeds fall short, the cash-out cannot stretch. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.
Path two, renovation loan. She submits plans and a contractor. The appraiser values the home as if the cottage were finished. That higher value lifts the ceiling. The renovation money goes into escrow and is released as work is done. More steps, yes. But the math may reach where the cash-out could not.
What decides it? Four things: how much equity exists today versus after the build, whether the ADU is attached or detached, whether zoning and permits are in order, and what kind of loan she holds now. Run both through a broker who can see multiple programs, then compare the Loan Estimates.
Costs, Risks and Common Mistakes
Both options replace your existing first mortgage with a bigger one. That resets the term and reprices the entire balance, not just the new money. If your current loan is one you would rather keep, a separate second lien is a different tool, outside this comparison.
Closing costs differ in kind. A renovation loan adds an as-completed appraisal and inspections. A cash-out adds the usual refinance costs. Compare the full Loan Estimate and the Closing Disclosure for each. Do not trust any “no-cost” marketing term at face value, because the costs are built into the rate or the balance.
Common mistakes:
- Assuming a rate-and-term refinance will fund the build.
- Applying before checking zoning and permit rules.
- Borrowing against ADU value that the appraiser has not yet counted.
- Spending the lump sum on early costs without a budget for overruns.
- Choosing a renovation loan, then finding the lender does not offer it.
- Relying on old rules. Fannie Mae updated its renovation and cash-back guidelines recently, and some third-party sites still show the older cash-back cap.
One protection applies to either path. A refinance of your home carries a right to cancel. Under the CFPB’s rescission explainer, you generally have three business days, and notice must be in writing. A phone call is not enough. Cancelling the refinance does not erase your original loan.
The Verdict
Here is the honest referee’s call. Choose the cash-out refinance when your equity today covers the project and you value a simple, flexible closing. Choose the renovation loan when the ADU’s finished value is what makes the numbers work, and you accept the added steps in return.
This is a genuine toss-up for borrowers in the middle: decent equity, a mid-size build. Cash-out wins on simplicity. The renovation loan wins on reach and discipline. The tie-breaker is usually the appraisal gap between today’s value and the finished value, and the contractor’s readiness to work inside a draw schedule.
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. Every figure here is subject to lender guidelines and full file review, and none of it is a commitment to lend.
Frequently Asked Questions
Can a limited cash-out refinance pay for my ADU?
Not in any practical way. It allows only incidental cash back, such as the lesser of 2% of the new loan or $2,000 at Fannie Mae, or the greater of 1% or $2,000 at Freddie Mac. Construction money needs a full cash-out or a renovation product.
Do I need a special ADU loan?
No. Fannie Mae says any of its products can finance an ADU, and Freddie Mac allows ADU financing through all of its offerings. The question is which structure reaches the dollars you need, and which one your lender actually offers.
Does the ADU have to be attached?
Only on FHA 203(k). Fannie Mae allows a detached accessory unit, and Freddie Mac allows one ADU on one- to three-unit properties. In every case, zoning and permit compliance still apply, subject to lender guidelines.
Can ADU rental income help me qualify?
Sometimes. Freddie Mac says ADU rental income can be qualifying income when its requirements are met, and FHA policy allows it in certain cases. Eligibility depends on property type and documentation, so do not count on it before the lender confirms.
What happens to unused renovation money?
Unused contingency funds, unless they came directly from you, go toward your loan balance after the work is complete. A cash-out has no such mechanism. The lump sum is yours to manage, which is both its appeal and its risk.
For your own numbers, request a scenario review with Lendmire.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage brokerage serving homeowners and home buyers in 16 states. FHA, VA, conventional and jumbo purchase and refinance loans are arranged through wholesale lending channels; Lendmire brokers the financing and the lender underwrites each application. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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Informational only. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
References
1. Fannie Mae: Accessory Dwelling Units
2. Fannie Mae Selling Guide B2-1.3-02
3. Freddie Mac: ADU Fact Sheet
5. Fannie Mae: HomeStyle Renovation
6. HUD: 203(k) Program Comparison Fact Sheet
7. Freddie Mac
8. CFPB: Right of Rescission Explainer
This article is part of Lendmire’s cash-out refinance program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Cash-Out Refinance vs Home Equity Loan Qualification Requirements · Cash-Out Refinance Requirements When You Are Relocating · How Lenders Underwrite a Cash-Out Refinance to Fund a Renovation
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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- Lendmire LLC · Firm NMLS# 2371349 · Verify firm licensure
Legal disclosures. Lendmire (NMLS# 2371349) is a state-licensed mortgage brokerage that arranges financing through wholesale lender relationships. Lendmire is not a direct lender, depository institution, or registered financial advisor. The discussion above is general informational content about real estate financing — it is not financial, legal, or tax advice, and readers should consult licensed professionals for guidance on their individual circumstances. Loan inquiries are subject to lender underwriting; this article does not represent a commitment to lend. Loan terms, rates, and qualification standards vary by borrower, property, and state, and are subject to change at any time. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.