A house can fail to qualify for conventional financing when the property itself doesn’t meet the condition, legal, or structural standards that Fannie Mae and Freddie Mac require of their collateral.1Consumer Financial Protection Bureau. What Are Fannie Mae and Freddie Mac? The reasons a house would not qualify for conventional financing fall into a handful of predictable buckets: safety hazards, missing or incomplete systems, ineligible property types, condo project problems, title defects, zoning violations, and a sale price the appraisal won’t support. The lender’s logic is the same across all of them: the home has to be safe to live in today and resellable at market value tomorrow if the borrower stops paying.
Safety, Structure, and Habitability
Fannie Mae requires every property backing a conventional loan to be safe, sound, and structurally secure.2Fannie Mae. B2-3-01, General Property Eligibility Appraisers flag immediate threats to occupants or the building. Friable asbestos — the type that crumbles into breathable dust — generally has to be professionally removed before a lender will move forward. Extensive mold is another stop sign, because it points to active moisture intrusion that will keep eating framing and finishes.
Lead-based paint gets extra attention in homes built before 1978. Federal law requires sellers to disclose known lead hazards and provide buyers with an EPA-approved pamphlet before the sale.3U.S. Environmental Protection Agency. Real Estate Disclosures About Potential Lead Hazards If an appraiser sees peeling or chipping paint in a pre-1978 home, the lender may require a lead clearance report before closing.
Structural defects can disqualify a property outright. A crumbling foundation, a cracked load-bearing wall, or a roof at the end of its useful life all raise the same question for the appraiser: can this component keep functioning and protect the home’s value?2Fannie Mae. B2-3-01, General Property Eligibility When the answer is no, the lender denies the loan or conditions it on repairs being completed before closing.
Wells and Septic Systems
Homes on a private well or septic face extra scrutiny. Lenders typically require a water potability test confirming the well produces safe drinking water, plus a septic inspection showing the system works. The well also has to sit an adequate distance from the septic system to prevent contamination, with the exact standard set by state and local health authorities. Water tests generally run $50 to $200, and a full septic inspection costs several hundred dollars. A failed inspection means repairs or replacement before the loan can close.
Missing Utilities and Incomplete Construction
Conventional lenders expect the home to be move-in ready the day of closing. That means a working kitchen with a permanently installed stove and oven, and at least one operational bathroom with a toilet, sink, and tub or shower. Missing flooring, exposed subfloor, open walls, or dangling wiring will make the property ineligible.2Fannie Mae. B2-3-01, General Property Eligibility
Mechanical systems have to be complete and functional at the time of the appraisal. The home needs a permanent heating source adequate for every living area; space heaters and portable units don’t satisfy the rule.2Fannie Mae. B2-3-01, General Property Eligibility Plumbing and electrical have to work, water supply has to be reliable (public or a certified well), and sewage disposal has to be approved. Utilities need to be on during the appraisal so the appraiser can confirm it all runs.
A fully off-grid home is a particular problem. Fannie Mae requires that properties with solar energy systems remain connected to the electrical grid, so a house relying exclusively on standalone solar or wind with no utility connection generally will not qualify.4Fannie Mae. Renewable Energy Generation Systems
Property Types That Don’t Qualify
Some homes are ineligible no matter how clean the inspection comes back.
Manufactured Homes
A manufactured home can get a conventional loan, but only if it clears a specific checklist. It must have been built after June 15, 1976, in compliance with federal construction and safety standards, and display both a HUD Data Plate and a HUD Certification Label for each section. It must sit on a permanent foundation, with the towing hitch, wheels, and axles removed. It must 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, as is one with unapproved structural modifications. Any added room or load-bearing change has to be inspected and certified as structurally sound by a qualified third party before a 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 barriers 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, which makes them personal property rather than real estate. A small home that meets the square footage minimum, rests on a permanent foundation, and complies with local building code can clear the bar, but that combination is uncommon in the tiny-home market.
Non-Warrantable Condos
When you buy a condo with a conventional loan, the lender evaluates the whole project, not just your unit. A “non-warrantable” condo is one where the project itself fails Fannie Mae or Freddie Mac eligibility rules, which makes your unit ineligible even if it’s immaculate.
Concentrated ownership is a common disqualifier. A project is ineligible when a single entity — an individual, partnership, or developer — owns more than two units in a project of 5 to 20 units, or more than 20% of units in a project of 21 or more.6Fannie Mae. B4-2.1-03, Ineligible Projects One owner’s bankruptcy or wave of defaults could destabilize the HOA. Lenders also look at how many units have actually sold versus how many the developer still controls.
The project’s mix matters too. If more than 35% of the total square footage is commercial or nonresidential, the project is disqualified, and rental apartments and hotel units inside a condo building count as commercial for that calculation.6Fannie Mae. B4-2.1-03, Ineligible Projects
Active lawsuits against the HOA, especially around structural defects or safety, create another block. Pending litigation is allowed 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 also has to meet Fannie Mae standards; a property insurance deductible above 5% of total coverage per occurrence, with no deductible buy-back or unit owner coverage filling the gap, can push a project into non-warrantable territory.7Fannie Mae. B7-3-03, Master Property Insurance Requirements for Project Developments Thin reserve funds add further risk.
Title and Lien Problems
A conventional lender needs a first-priority lien, so the title has to be clear of competing claims. Several defects commonly stop a loan:
- Mechanic’s liens filed by unpaid contractors or subcontractors, which take priority until resolved.
- Boundary encroachments, where a neighbor’s fence, shed, or driveway crosses onto the property or vice versa. Lenders may require a recorded boundary line agreement before financing.
- Ownership disputes tied to probate, divorce, or unrecorded land contracts. The loan won’t close until the dispute is resolved.
- Easements that block driveway access, prevent construction in a key area, or otherwise limit the property’s main use, making it unmarketable in the lender’s view.
Title insurance is required on conventional loans. If the title company finds defects it can’t insure around, the loan stalls until those issues clear.
Leased Solar Panels
Leased solar panels are 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, which can compete with the mortgage lender’s first-lien position. Fannie Mae requires lenders to have legal counsel review solar contracts and determine whether any competing liens exist.8Fannie Mae. Solar Photovoltaic Systems If the solar company won’t subordinate its lien to the mortgage, the loan generally can’t proceed. Before buying a home with leased panels, get a copy of the solar agreement and confirm the lease can be transferred and the lien subordinated.
Zoning and Unpermitted Work
A “legally non-conforming” property was built to code at the time but no longer matches current zoning. These homes can sometimes qualify, but only if they could be rebuilt to their current size and use after a total loss such as a fire. If local zoning would block that reconstruction, the lender has to evaluate whether the reduced rebuild rights hurt the property’s value.9Fannie Mae. Zoning and Legally Non-Conforming Status A letter from the local zoning authority confirming rebuild rights can help clear this.
Unpermitted work is another trap. A garage converted to living space, a basement finished without proper egress windows, or an accessory dwelling unit built without permits can all trigger a denial. These improvements often violate density, setback, or safety codes, and the appraiser may strip the unpermitted square footage out of the valuation entirely. Outstanding code enforcement actions make things worse, because they can mean daily fines or mandatory demolition. Lenders avoid properties with unresolved violations because the cost and legal exposure are unpredictable.
The Appraisal Comes In Low
Even a home in perfect condition can sink the loan if it appraises below the purchase price. Conventional lenders base the loan amount on the lower of the appraised value or the purchase price.10Fannie Mae. Understanding Home Appraisals If you agreed to pay $350,000 and the appraisal lands at $330,000, financing is based on $330,000. You cover the gap in cash, renegotiate with the seller, or walk away.
Low appraisals are especially common in fast-moving markets where bidding pushes 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, but the appraiser isn’t required to change the number.
What to Do if the House Doesn’t Qualify
A failed appraisal doesn’t always end the deal. When the appraiser flags specific items — a leaking roof, a broken furnace, peeling paint in a pre-1978 home — the lender can let the seller fix them and then verify completion before closing. Fannie Mae uses the Appraisal Update and Completion Report (Form 1004D) for that verification, and the appraiser can confirm the work through an on-site visit or through digital photos, video walkthroughs, or virtual inspection, with documentation authenticated by metadata and geocode.11Fannie Mae. B4-1.2-05, Requirements for Verifying Completion and Postponed Improvements Re-inspection fees run around $150, with variation by market.
When the property needs more than a quick fix, two renovation loan programs can bridge the gap.
FHA 203(k) Rehabilitation Loan
The FHA 203(k) rolls repair costs into the mortgage so you can buy a property that isn’t move-in ready. The Limited 203(k) allows up to $75,000 in financing for minor, non-structural repairs like flooring, kitchen updates, or painting. 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 These are FHA loans, so they carry mortgage insurance and their own property standards, but the condition bar is lower than conventional because the repair money is built in.
Fannie Mae HomeStyle Renovation
HomeStyle Renovation keeps you inside the conventional framework by financing the purchase and the renovation in one loan. Down payments start as low as 3% for first-time buyers. The loan amount is based on the lesser of the purchase price plus renovation costs, or 75% of the home’s projected value after renovations.13Fannie Mae. HomeStyle Renovation Eligible work includes kitchen and bathroom remodels, HVAC replacement, additions, window upgrades, and natural disaster resiliency projects. All work has to meet local building code and be permanently attached to the property.
Both 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 the right repairs, they can turn an ineligible property into a financeable one.