A house can fail to qualify for a conventional mortgage for reasons that have nothing to do with the buyer’s credit or income. Conventional loans backed by Fannie Mae or Freddie Mac hold the property itself to strict standards, and the most common reasons a house would not qualify for conventional financing are safety hazards, incomplete construction or missing utilities, ineligible property types, non-warrantable condo projects, title defects, zoning violations, and appraisals that come in below the purchase price.1Consumer Financial Protection Bureau. What Are Fannie Mae and Freddie Mac? Because the house is the collateral, the lender needs to know it can be occupied safely today and resold at market value if you default.
Safety, Structural, and Habitability Problems
Every property financed with a conventional loan must be safe, sound, and structurally secure.2Fannie Mae. B2-3-01, General Property Eligibility Appraisers watch for immediate physical threats to occupants or to the building. Friable asbestos, the kind that crumbles into breathable dust, usually has to be professionally removed before a lender will move forward. Extensive mold gets flagged too, because it signals ongoing moisture intrusion that damages framing and finishes.
Homes built before 1978 face extra scrutiny for lead-based paint. Federal law requires sellers to disclose known lead hazards and provide an EPA-approved pamphlet before the sale.3U.S. Environmental Protection Agency. Real Estate Disclosures About Potential Lead Hazards If the appraiser sees peeling or chipping paint in a pre-1978 home, the lender may require a lead clearance report before approving the loan.
Structural defects are their own category of denial. A crumbling foundation, a cracked load-bearing wall, or a roof at the end of its useful life can all disqualify a property.2Fannie Mae. B2-3-01, General Property Eligibility The appraiser judges whether those components can keep functioning safely. When they can’t, the lender either denies the loan or requires repairs before closing.
Wells and Septic Systems
Homes on a private well or septic system face additional testing. Lenders typically want a water potability test showing the well produces safe drinking water and a septic inspection confirming the system works. The well also has to sit an adequate distance from the septic system to prevent contamination, with the exact distance set by state or local health rules. Water tests generally run $50 to $200, and a full septic inspection can cost several hundred dollars. If either fails, repair or replacement must happen before the loan closes.
Incomplete Construction and Missing Utilities
Conventional lenders expect you to be able to move in the day you close. That “move-in ready” standard means a fully functional kitchen with a permanently installed stove and oven, and at least one working bathroom with a toilet, sink, and tub or shower. Missing flooring, exposed subflooring, open walls, or dangling wiring all signal incomplete construction and make the home ineligible.2Fannie Mae. B2-3-01, General Property Eligibility
Mechanical systems must also be complete. The house needs a permanent heating source adequate for all living areas; space heaters and portable units don’t count.2Fannie Mae. B2-3-01, General Property Eligibility Plumbing and electrical must be operational, and the property needs a reliable water supply and approved sewage disposal. Utilities have to be turned on during the appraisal so the appraiser can confirm everything actually works.
Off-grid properties are a specific trap. Fannie Mae requires that even homes with solar or wind systems stay connected to the electrical grid.4Fannie Mae. Renewable Energy Generation Systems A fully off-grid home, no matter how capable its energy setup, generally cannot get conventional financing because there’s no utility backup if the system fails.
Property Types That Don’t Qualify
Some properties are ineligible no matter how good their condition. Knowing this early saves you from a loan application that can’t be approved.
Manufactured and Mobile Homes
A manufactured home can qualify, but only if it clears a strict list of requirements. It must have been built after June 15, 1976, in compliance with federal construction and safety standards, and must display both a HUD Data Plate and HUD Certification Label for each section. The home must be permanently attached to a foundation with the towing hitch, wheels, and axles removed. It also has to be at least 12 feet wide with a minimum of 400 square feet of above-grade finished living area.5Fannie Mae. B2-3-02, Special Property Eligibility and Underwriting Considerations – Factory-Built Housing
A manufactured home previously installed at a different site is generally ineligible. So is one with unapproved structural modifications. If a prior owner added a room or made load-bearing changes, a qualified third party has to inspect and certify the modification as structurally sound before the lender will consider the loan.5Fannie Mae. B2-3-02, Special Property Eligibility and Underwriting Considerations – Factory-Built Housing
Tiny Homes
Most tiny homes don’t qualify. The obstacles are the 400-square-foot minimum, the requirement for a permanent foundation classified as real property, and the fact that many tiny homes sit on trailers, making them personal property rather than real estate. A tiny home that meets the size floor, rests on a permanent foundation, and complies with local building codes may clear the bar, but these cases are uncommon.
Non-Warrantable Condominiums
When you buy a condo with a conventional loan, the lender evaluates the entire project, not just your unit. A non-warrantable condo is one where the project itself fails Fannie Mae or Freddie Mac standards, which makes your unit ineligible even if it’s flawless inside.
Ownership concentration is a frequent disqualifier. A project is ineligible when a single entity owns more than two units in a project with 5 to 20 total units, or more than 20% of units in a project with 21 or more units.6Fannie Mae. B4-2.1-03, Ineligible Projects One owner’s bankruptcy or wave of defaults could destabilize the whole association.
Physical makeup also matters. If more than 35% of the total square footage is used for commercial or nonresidential purposes, the project is disqualified. Rental apartments and hotel units inside a condo building count as commercial space for this calculation, even though they look residential.6Fannie Mae. B4-2.1-03, Ineligible Projects
Active lawsuits against the homeowners association are another common blocker. Pending litigation is considered minor enough to allow financing only if anticipated damages and legal costs are not expected to exceed 10% of the project’s funded reserves.6Fannie Mae. B4-2.1-03, Ineligible Projects The association’s master insurance policy must also comply: the maximum allowable deductible for property coverage is 5% of the total coverage amount per occurrence.7Fannie Mae. B7-3-03, Master Property Insurance Requirements for Project Developments If the deductible exceeds that threshold with no buy-back or unit-owner coverage to fill the gap, the project can be non-warrantable. Inadequate reserves for long-term maintenance can disqualify it too.
Title and Ownership Defects
A conventional lender needs a first-priority lien, which means the title has to be clear of competing claims. Several defects can stop the loan.
- Unpaid contractors or subcontractors may have filed mechanic’s liens that take priority until resolved.
- Boundary encroachments, such as a neighbor’s fence, shed, or driveway crossing the property line, can freeze financing until a boundary line agreement is recorded.
- Ownership disputes tied to probate, divorce, or unrecorded land contracts leave who actually owns the home in question, and lenders won’t close until they’re resolved.
- Easements that block driveway access, prevent construction in a key area, or otherwise limit the primary use of the property can make it unmarketable to the lender.
Title insurance is required to protect the lender against undiscovered claims. If the title company finds defects it can’t insure around, the loan stalls until they’re cleared.
Leased Solar Panels
Leased solar is an increasingly common title complication. When panels are leased rather than owned, the solar company typically files a UCC-1 fixture filing against the property, and that filing can compete with the mortgage lender’s first-lien position. Fannie Mae guidelines require lenders to have legal counsel review all solar-related contracts and identify any competing liens.8Fannie Mae. Solar Photovoltaic Systems If the solar company won’t subordinate its lien to the mortgage, the loan generally can’t proceed. Ask for the solar agreement before you go under contract and confirm the lease can be transferred and the lien subordinated.
Zoning and Unpermitted Work
Local zoning controls what can be built on a lot and how it can be used. Homes that violate those rules carry both legal risk and future value risk that lenders don’t want to hold.
A legally non-conforming property was built in compliance with zoning at the time but no longer conforms because the rules changed later. These homes can sometimes qualify, but only if they can be rebuilt to their current size and use after a total loss such as a fire. If local zoning would prevent full reconstruction, the lender must evaluate whether the reduced rebuilding rights significantly affect value.9Fannie Mae. Zoning and Legally Non-Conforming Status A letter from the local zoning authority confirming rebuild rights can help resolve the question.
Unpermitted work is a separate hazard. A garage converted into a living space, a basement finished without egress windows, or an accessory dwelling unit built without permits can trigger a denial. These improvements often violate density, setback, or safety codes, and the appraiser may exclude the unpermitted square footage from the home’s value entirely. Outstanding code enforcement actions are worse still, because they can bring daily fines or mandatory demolition, and lenders avoid properties with unresolved violations because the cost to fix them is unpredictable.
Low Appraisal Value
Even a home in perfect condition can lose its financing if the appraisal comes in below the purchase price. Conventional lenders base the loan on the lower of appraised value or purchase price.10Fannie Mae. Understanding Home Appraisals Agree to pay $350,000, get an appraisal of $330,000, and the lender will finance against the $330,000 figure. You have to cover the $20,000 gap in cash, renegotiate with the seller, or walk away.
Low appraisals are especially common in fast-moving markets where bidding wars push contract prices past what recent comparable sales support. If you think the appraisal is wrong, your lender can request a reconsideration of value with additional comparables the appraiser may have missed, but the appraiser is not required to change the number.
What to Do If the House Doesn’t Qualify
A property failure isn’t always the end of the deal. When the appraiser flags specific problems, such as a leaking roof, a broken furnace, or peeling paint in a pre-1978 home, the lender can allow the seller to make the repairs and then verify completion before closing. Fannie Mae uses the Appraisal Update and Completion Report (Form 1004D) for that verification.11Fannie Mae. B4-1.2-05, Requirements for Verifying Completion and Postponed Improvements Re-inspection fees typically run around $150, though costs vary.
If the condition problems are too big for a repair-before-closing fix, two renovation loan programs may still get the deal done. The FHA 203(k) rehabilitation loan rolls repair costs into the mortgage. The Limited 203(k) allows up to $75,000 for minor, non-structural repairs like flooring, kitchen updates, or paint. The Standard 203(k) covers major renovations and structural work, with a minimum repair cost of $5,000.12U.S. Department of Housing and Urban Development. 203(k) Rehabilitation Mortgage Insurance Program Types Because these are FHA loans, they carry mortgage insurance and their own property standards, but the condition bar is lower than for a conventional loan.
Fannie Mae’s HomeStyle Renovation mortgage keeps you inside the conventional loan framework. It finances purchase and renovation together, with down payments as low as 3% for first-time buyers and eligible improvements ranging from kitchen and bath remodels to HVAC replacement, additions, window upgrades, and natural disaster resiliency work. The loan amount is based on the lesser of purchase price plus renovation costs or 75% of the home’s projected post-renovation value.13Fannie Mae. HomeStyle Renovation All work has to comply with local building codes and be permanently attached to the property.
Both renovation programs require a licensed contractor and a detailed scope of work before closing, and both take longer than a standard purchase because of the extra inspections, draw schedules, and paperwork. For a house you want that just needs specific repairs, they can be the difference between a denial and a closing.