Refinance Home With Unpermitted Work — The Quick Read: Usually, yes, you can refinance a home with unpermitted work, but the outcome depends on four things. Is the use legal under zoning? Is the work safe and sound? Can the appraiser support the value with market data? Which loan program are you using? Some government streamlines skip the appraisal entirely. A conventional refinance does not. Everything here is subject to lender guidelines and full file review.
Key Takeaways
- Unpermitted work does not automatically block a refinance. Illegal use, safety problems, and unsupported value do.
- On a conventional loan, the appraiser reports what they see and what the market supports. They are not a building inspector.
- The FHA Streamline and VA IRRRL are built to avoid a new appraisal. That helps only if you already hold an FHA or VA loan.
- You are entitled to a copy of the appraisal, and you can ask for a reconsideration of value.
- Disclose early. A surprise in the appraisal is harder to fix than a known issue on day one.
What Counts as “Unpermitted Work”?
Unpermitted work is any construction or alteration done without the building permit your local government required. Think of a finished basement, a converted garage, a room addition, a new bathroom, or rewired electrical.
Here is the distinction that trips people up. “Unpermitted” and “illegal use” are two different questions. A permit question asks whether the city signed off on the work. A zoning question asks whether the way the space is used is allowed on that lot. A deck built without a permit is still a deck. A second kitchen that turns a single-family house into a de facto duplex raises a zoning problem.
Lenders and appraisers care about both. The second one usually matters more.
How the Appraiser Handles It
The appraiser reports what is observed and what the market supports. They do not issue permits, and they do not condemn work. Their job is condition, quality, and value.
On a conventional loan, the appraiser reports zoning compliance in one of four ways: legal, legal non-conforming, illegal, or no zoning. Fannie Mae’s site section guidance says it will buy loans where the improvements are a legal conforming use. It will also take a legal non-conforming use, often called grandfathered, when the appraisal reflects any adverse effect on value and marketability.
When the appraiser sees an addition that lacks the required permit, Fannie Mae’s appraisal FAQ says they must comment on it. In practice that usually means three things:
1. They describe the quality and appearance of the work. 2. They say whether it affects value or marketability. 3. They support any value credit with market data, such as similar homes that sold with similar improvements.
That last point is where deals get won or lost. Many appraisers handle unpermitted space conservatively. A common approach is to leave unpermitted area out of the finished living area count unless comparable sales show the market treats it as equivalent space. That is practice, not a published rule, and it varies by appraiser. Still, expect it.
The current Selling Guide also lists “Additions without Permits” in its improvements section. The exact wording is something your loan officer should confirm for your file, since appraisal guidance gets updated.
How the Lender Uses the Appraisal
The lender is the second set of eyes. Under Fannie Mae’s appraisal review rules, the lender checks that the appraisal supports eligibility and that the value reflects the home’s condition and marketability.
Across the wholesale programs we place files with, the lender’s questions tend to fall into the same pattern:
- Is the use legal? Illegal use is the hardest problem to cure.
- Is the work safe and structurally sound? Electrical, plumbing, load-bearing changes, and heating and cooling carry more weight than cosmetic work.
- Does the value hold up without the unpermitted part? If the appraiser excludes it, the lender underwrites the lower number.
- Does the lender’s own rulebook go further than the agency’s? Individual lenders can add stricter conditions. That is one reason two lenders can answer differently on the same house.
The lender then decides one of a few things. It can proceed as is. It can require repairs or a completion condition. It can ask for a retroactive permit or inspection if local rules call for one. Or it can move you to a different program.
When Safety Becomes the Dealbreaker
Condition ratings are how conventional lending separates cosmetic issues from real problems. Under Fannie Mae’s property condition rules, a home rated C6 is not eligible for sale to Fannie Mae. Safety, soundness, or structural deficiencies must be repaired to at least C5 before the loan is sold. An “as is” appraisal is allowed only when conditions are minor and do not affect safety, soundness, or structural integrity.
Picture two homes. The first has a DIY kitchen refresh with no permit: new cabinets, new counters, a moved outlet done by a competent hand. The second has a garage turned into a bedroom with a space heater for warmth and no inspected wiring. The first is usually a minor appraisal comment. The second may draw a repair or completion condition, and if the problem is serious enough, it may stall the loan.
The general property standard behind this is simple. Fannie Mae’s eligibility rules require a property that is safe, sound, and structurally secure, with a use that is legal or legal non-conforming.
Which Loan Path Are You On?
The program you choose changes whether an appraiser ever walks through your house. This is the most useful thing to know before you apply.
| Refinance path | Appraisal? | Unpermitted work matters? |
|---|---|---|
| Conventional rate-and-term | Yes, full appraisal | Yes, directly |
| FHA Streamline | Not required | Less, but lender may add conditions |
| VA IRRRL | Generally not required | Less, but lenders may set rules |
| Jumbo | Yes | Yes, with lender overlays |
Conventional rate-and-term. This is also called a limited cash-out refinance. The new loan pays off your existing first mortgage, the closing costs, and a purchase-money second lien, with only incidental cash back. On a one-unit principal residence it goes up to 95% loan-to-value, which means the loan can be up to 95% of the home’s appraised value. It reaches 97% where the existing loan is agency-owned and the first-time-buyer program allows. Mortgage insurance applies above 80%. Your appraised value decides all of this, so how the appraiser treats unpermitted work flows straight into leverage.
FHA Streamline. If you already have an FHA loan, the streamline involves no appraisal and a limited credit review, plus a net tangible benefit test. The older HUD handbook chapter says a streamline may be made with or without an appraisal and does not require repairs, apart from lead-based paint. Still, a lender may require repairs as a condition. No appraisal does not mean no property rules. That handbook is older, so expect your loan officer to check it against the current HUD handbook. If you want an appraisal-based FHA rate-and-term refinance instead, the program allows 97.75% with an appraisal, and then the property is looked at.
VA IRRRL. If you have a VA loan, the interest rate reduction refinance is a VA-to-VA loan. It carries a 0.5% funding fee unless you are exempt, and it comes with no VA appraisal requirement, a net tangible benefit test, and a seasoning requirement of the later of 210 days and 6 payments. The VA says most IRRRLs typically do not require underwriting. The appraisal point is “generally not required.” Lenders can still set their own requirements.
Jumbo. Above the conforming limit, the jumbo lanes take over. They start at a 660 decision score, reach 90% leverage, and go to $5,000,000, with a 50% ratio ceiling on the fixed lanes. They use full appraisals, so unpermitted work is in play. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.
Our refinance programs page lays out how these paths compare on the same home.
Where the General Rule Breaks
“Unpermitted work won’t automatically kill your refinance” is true. These are the cases where it gets harder.
An illegal additional unit. This is the most serious category. A basement apartment or converted garage with its own kitchen and entrance, in an area that does not allow a second unit, is a use problem rather than a permit problem. Agency guidance on such properties is tight, and your lender may apply its own rules on top. Expect the loan officer to ask whether the home is a single-family house or something more.
Legal non-conforming use. If the use was legal when built and later became disallowed by a zoning change, the home may be grandfathered. Fannie Mae accepts it with an appraisal adjustment for effect on value. The catch is rebuilding. Fannie Mae will not buy loans where land-use rules would prevent rebuilding after damage, and it cites coastal tideland and wetland laws as examples.
Accessory dwelling units. A legal, permitted ADU is a different story. Fannie Mae’s announcement SEL-2025-08 allows rental income from one ADU to count toward qualifying only on a one-unit principal residence, for purchase and limited cash-out refinances. An unpermitted ADU does not get that treatment, so do not count on its income.
Insurance. Unpermitted work can complicate an insurance claim later. It can also complicate a future sale. Both are reasons to talk to your insurance agent before you assume everything is covered.
Occupancy. If the home is not your primary residence, the leverage limits change. Occupancy decides the leverage, so check the program for the way you actually use the home.
What You Can Do Before the Appraiser Arrives
You have more influence here than most borrowers realize. The appraiser’s conclusion rests on evidence, so give them some.
1. Tell your loan officer on day one. Surprises are expensive. Disclosed early, the issue becomes a variable to plan for.
2. Gather the paper trail. Photos of the work, contractor invoices, any inspection reports, and any correspondence with the building department.
3. Check your local permit status. Some jurisdictions allow retroactive permits. Others require more. Rules differ by city and county.
4. Fix obvious safety issues first. A loose railing, exposed wiring, or a missing smoke detector costs less to fix before the visit than after a condition lands in the report.
5. Consider a professional inspection. For structural, electrical, or plumbing work, a licensed inspector’s report gives the lender something concrete.
6. Know your comparables. If similar homes nearby sold with similar finished space, the appraiser has market support to use.
The honest tradeoff: permitting after the fact adds cost and delay, and it can reveal that work must be opened up or redone. I have no sourced national figure for what that costs, because it swings widely by job and by jurisdiction. Ask your local building department before you decide.
What Happens If the Value Comes in Low?
If the appraiser excludes or discounts the unpermitted work, three numbers can change: the appraised value, your loan-to-value, and your mortgage insurance.
Mortgage insurance applies above 80% LTV. You may request cancellation at 80% of the original value, with good payment history, no subordinate liens, and no decline in value. The servicer must end it automatically at 78%, under the Homeowners Protection Act. Published typical annual premiums run 0.58% to 1.86% of the balance. That is a range, not a quote. Terms vary by lender guidelines, property type, leverage, credit profile, and full file review.
A lower value can push you across the 80% line, or out of the program you wanted. Here is a way to think about it. A home with a finished lower level counted in value may sit comfortably under the threshold. Take the lower level out and the same loan may sit above it. Same house, different math.
If you believe the value is wrong, you have options. Fannie Mae describes a reconsideration of value process. You can ask your lender to submit better comparable sales or point out a factual error.
You also have a right to see what the appraiser wrote. Under the CFPB’s appraisal guidance, you are entitled to a copy of the appraisal on a first-lien home loan, and the timing of when it must be delivered depends on the rules that apply to your file and lender. You cannot be charged for the copy. You can be charged a reasonable fee for the cost of the appraisal itself. Read it. Check how the unpermitted area was described and whether the comparables make sense.
Is the Refinance Worth It With This Complication?
Treat it like any refinance decision, with one extra variable. Ask these in order:
- Can the work be fixed or permitted at a cost that still leaves the refinance worthwhile?
- Do you hold an FHA or VA loan that makes a no-appraisal streamline possible?
- If the value drops, are you still under the leverage and mortgage insurance thresholds you need?
- Does the refinance still pass the break-even test once any repair or permit cost is added?
If you are weighing a cash-out instead, the bar is higher. Conventional cash-out on a one-unit principal residence is limited to 80% LTV, with seasoning rules on the loan being paid off. A discounted value cuts into that fast. Exact terms depend on the lender’s guidelines, property type, leverage, and a full review of the borrower’s file.
A related complication is a second mortgage on the home. If that applies to you, see our explainer on refinancing with a second lien subordination. 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
Unpermitted work: Construction or changes made without the building permit your local government required.
Legal non-conforming use: A use that was legal when established but no longer matches current zoning, often called grandfathered.
Condition rating (C1 to C6): The appraiser’s standardized score for a home’s condition; C6 means serious deficiencies.
Loan-to-value (LTV): The loan amount divided by the home’s appraised value, shown as a percentage.
Net tangible benefit: A test showing the refinance actually improves your situation, as required on FHA and VA streamlines.
Reconsideration of value: A formal request to have the appraiser review the value using new evidence.
Frequently Asked Questions
Can I refinance with minor unpermitted cosmetic work?
Usually, yes. Cosmetic work that is safe and does not change the home’s use tends to draw an appraiser comment at most. The appraiser must note unpermitted additions and whether they affect value or marketability. Minor, non-safety conditions can be appraised “as is.” Subject to lender guidelines and full file review.
Will the lender report me to the city?
This is not a published part of the program rules described here, and practice varies. The appraiser and lender are focused on value, eligibility, and safety, not enforcement. Ask your loan officer how your lender handles it before the appraisal is ordered. That conversation is a good reason to disclose early.
Does an FHA Streamline or VA IRRRL avoid the problem?
Often, but only if you already hold an FHA or VA loan. Those programs generally do not require a new appraisal, so the appraiser never comments on the work. Lenders may still set their own conditions, including repairs. If your current mortgage is not an FHA or VA loan, you do not qualify for these programs.
What if the appraisal excludes the unpermitted space?
The lender underwrites to the lower value, which can raise your LTV and change mortgage insurance needs. You can review your appraisal copy, submit stronger comparable sales, and request a reconsideration of value. Or you can permit and document the work and reapply. Which path fits depends on cost and your goal.
Can I fix the permit problem during the refinance?
Sometimes. Lenders can set conditions, such as completing repairs or obtaining a retroactive permit or inspection, before closing. Whether that works depends on your local building department and the lender. For major or structural work, resolving it first usually makes for a cleaner file.
If you are weighing a refinance and want the break-even run on your own numbers, Lendmire can help you compare the programs on the same home.
For the program’s current guidelines, see a scenario review with Lendmire.
About Lendmire
As a mortgage broker (NMLS# 2371349), Lendmire helps home buyers in 16 states pair an FHA, USDA or HUD-184 first lien with a down payment assistance option arranged through wholesale lenders. Lendmire is never the lender; program terms are set by the lender and the agency guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
Get Started
Ready to find the right loan for you?
In about 30 seconds you can review financing options available for your home or investment property. No commitment required.
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 Selling Guide B4-1.3-04, Site Section
4. Fannie Mae Selling Guide B4-1.3-01, Review of Appraisal Report
5. Fannie Mae Selling Guide B4-1.3-06, Property Condition
6. Fannie Mae Selling Guide B2-3-01, General Property Eligibility
8. typically do not require underwriting
10. reconsideration of value process
11. CFPB, What are appraisals and why do I need to look at them?
This article is part of Lendmire’s Refinance series — every loan program’s qualification details, guidelines, and scenarios live on the loan options page.
Related reading: Cash-out Refinance For Home Improvements: What Lenders Require · Cash-out Refinance Vs A Second Lien: Choosing The Right Tool · Refinancing With Gaps In Employment Or A New Job
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
- Mortgage Loan Originator · NMLS# 1129696 · Verify on NMLS Consumer Access
- North Carolina Real Estate Broker · License# 343312 · Verify on NCREC
- North Carolina Insurance Producer · License# 19053198 · Property, Casualty, Life, Health · Verify on NAIC SBS
- Lendmire LLC · Firm NMLS# 2371349 · Verify firm licensure
Disclosure information. Lendmire is a state-licensed mortgage brokerage under NMLS# 2371349. Lendmire is not a depository institution, direct lender, or financial advisor — all loans referenced are placed through wholesale lender partners and are subject to each lender's underwriting standards. This article is provided for general informational purposes and is not a commitment to lend, nor does it constitute financial, legal, or tax advice. Loan programs, terms, rates, and qualification standards change without notice and depend on borrower profile, property type, and the state in which the subject property is located. Equal Housing Opportunity provider. NMLS Consumer Access: nmlsconsumeraccess.org.