Mortgage industry updates and rules are the federal, agency, and state changes. FHFA conforming loan limits, Fannie Mae and Freddie Mac Selling Guide bulletins, FHA and VA program updates, fair housing law, and local zoning and rent rules. That decide what you can borrow, what it costs, and what has to be disclosed to you.

They change constantly. FHFA resets conforming loan limits every November for the following January 1, and the GSEs publish guideline updates on a roughly monthly cadence. Almost none of it makes the news, but a single guideline change can move a borderline file from denied to approved.

Learn more about mortgage industry updates and rules, including who sets them, which changes reach your file, and what’s different in Michigan.

Key takeaways:

• Nobody writes one rulebook: Your loan is governed by at least four layers, CFPB consumer rules, FHFA and the GSEs, agency programs (FHA, VA, USDA), and state law, and they update on separate calendars.
• The dates you can count on: FHFA announces conforming loan limits each November effective January 1, and federal disclosure law guarantees you a Loan Estimate within 3 business days of applying and a Closing Disclosure at least 3 business days before closing.
• Rules rarely apply backward: A guideline change published after you lock generally doesn’t rewrite your loan, which is why a broker who tracks bulletins across 75+ wholesale lenders can find the lender whose current guidelines fit your file today.

Who actually writes the mortgage rules?

Four separate layers do, and they don’t share a calendar. Ranked by how directly they touch your file, they are the consumer regulator, the conventional-loan rulemakers, the government loan programs, and your state and municipality.

• The CFPB: The Consumer Financial Protection Bureau writes the consumer-facing rules. When disclosures have to reach you, how servicers handle your payments, and the ability-to-repay standard every lender has to document. Its published mortgage regulations are the reason your Loan Estimate looks identical no matter who quotes you.
• FHFA, Fannie Mae, and Freddie Mac: The Federal Housing Finance Agency oversees the two companies that buy most conventional loans, and it sets the conforming loan limit each year. Fannie and Freddie then write the Selling Guide that determines what a conventional loan can look like. Ongoing mortgage regulation updates land in this layer more often than anywhere else.
• HUD/FHA, the VA, and USDA: Each runs its own program handbook with its own credit, property, and fee rules. These are separate rulebooks, not variations on the conventional one. Which is exactly why a file that fails under one can pass under another.
• State and local government: States license lenders and brokers and write landlord-tenant law; cities and townships control zoning, permitting, and property tax administration. Many regulatory changes that affect what you pay at closing start here, and understanding how housing legislation becomes a lending rule explains why a bill signed one year often doesn’t reach your file until the next.

None of the four can override the others. They stack, which is why a loan can be perfectly legal, perfectly eligible for sale to Fannie Mae, and still declined by the lender in front of you. Our guide to mortgage rates and the housing market covers how the pricing side responds when these layers move.

GSE and agency updates: Fannie, Freddie, FHA, and VA

This layer changes your approval odds more than any other, because Fannie Mae and Freddie Mac buy the majority of conventional loans, which makes their Selling Guide the working underwriting rulebook for conventional lending. If the guide says a file is eligible, lenders can sell it. If it doesn’t, most won’t write it.

Lenders are allowed to be stricter than the guide, and most are. Those extra requirements are called overlays, they’re set lender by lender, and they’re published to brokers rather than to the public. Two wholesale lenders reading the same Fannie Mae bulletin can reach different answers on the same borrower in the same week.

Rule-setter	What it governs	Update cadence	Where it’s published
FHFA	Conforming loan limits; oversight of Fannie and Freddie	Limits announced each November, effective January 1	FHFA news releases and the conforming loan limit data page
Fannie Mae	Selling Guide; Desktop Underwriter eligibility	Selling Guide announcements roughly monthly	Fannie Mae selling policy announcements (SEL series)
Freddie Mac	Single-Family Seller/Servicer Guide	Selling bulletins roughly monthly	Freddie Mac Guide bulletins
HUD / FHA	FHA handbook, loan limits, mortgage insurance premiums	Mortgagee Letters as issued; limits annually	HUD Mortgagee Letters and FHA INFO messages
VA	Home loan program rules, entitlement, funding fee	Circulars as issued	VA lender circulars and the VA Lender’s Handbook
Individual lenders	Overlays layered on top of all of the above	Any time, with no public notice	Lender bulletins to their broker partners

The annual limit reset is the most predictable change on the calendar. FHFA set the 2026 baseline conforming loan limit for one-unit properties at $832,750, an increase of $26,250 over 2025, and published it in November for a January 1 effective date, the FHFA conforming loan limit values page carries the current figures. The FHFA updates worth watching each fall are the ones that decide whether your loan is conventional or jumbo.

FHA sets its own limits off that number rather than matching it. The FHA floor for a one-unit property is 65% of the conforming baseline and the ceiling is 150%, which put the 2026 figures at $541,287 and $1,249,125 for FHA case numbers assigned on or after January 1, 2026. Anyone who tells you the FHA limit equals the conforming limit is working from the wrong rulebook. Our roundup of FHA program updates tracks handbook and premium changes as they’re issued, and proposed changes to VA loan programs covers entitlement and fee rules on the VA side.

Here’s the practical version. Because Align is a broker rather than a direct lender, a denial from one wholesale lender is a data point, not a verdict, we re-run the same file against other lenders’ current guidelines instead of asking you to start over. Guideline movement also feeds pricing, and our how mortgage rates work hub explains that side.

Align Lending works with FHA- and VA-approved lenders and is not acting on behalf of, endorsed by, or sponsored by FHA, HUD, or the Department of Veterans Affairs.

The rules that protect you: disclosures and fair housing

Two federal rule sets sit between you and a bad surprise: disclosure timing, which runs on two separate 3-business-day clocks, and the Fair Housing Act, which names seven protected classes.

The first clock starts at application: you must receive a Loan Estimate within 3 business days of submitting a complete application. The second ends at the closing table: you must receive the Closing Disclosure at least 3 business days before you sign. That second window exists so you can compare the final numbers against the estimate while there’s still time to ask questions.

Three changes restart that second clock. The APR becoming inaccurate, a change to the loan product, or a prepayment penalty being added. Anything else, like a fee moving or a seller credit adjusting, gets you a corrected disclosure but doesn’t push your closing date. Knowing which is which is the difference between a calm closing week and a panicked one, and our guide to new mortgage disclosure rules walks through each trigger.

The Fair Housing Act prohibits discrimination because of race, color, national origin, religion, sex, familial status, and disability in renting, buying, getting a mortgage, and seeking housing assistance. If you believe a lender or landlord crossed that line, you can file with HUD’s Office of Fair Housing and Equal Opportunity within one year of the last discriminatory act, and you generally have two years to bring a private lawsuit. Lending-specific complaints can also go to the CFPB. Our guide to new fair housing laws covers what’s protected and what evidence actually helps a claim.

These protections cost you nothing and are easy to ignore right up until you need them. The broader impact of new mortgage regulations is usually more paperwork and more transparency, not a higher rate.

Housing policy beyond the mortgage: zoning, rent, and subsidy

These rules shape supply and value rather than your loan file, and they move slower, but they decide what can be built near you and what your own property is legally allowed to become.

• Zoning and density: Local zoning decides lot sizes, setbacks, unit counts, and whether an accessory dwelling unit or a lot split is even legal. A parcel that can hold two units is worth more than an identical parcel that can hold one. Start with zoning regulations before you assume a plan is possible.
• Rent regulation: Rent caps exist in a minority of states, and several states preempt them outright, meaning local governments are barred from enacting them at all. Our explainer on rent control covers where it applies and what it does to landlord math.
• Housing Choice Vouchers: Under the federal program most people still call Section 8 housing, a household generally pays 30% of its adjusted monthly income toward rent, capped at 40% when it first moves into a unit, and the local public housing agency pays the landlord the balance. If you’re buying a property with voucher tenants in place, that arrangement comes with the building.
• Local housing policy: Permitting speed, tax abatements, land banks, and demolition programs vary by municipality and shift with each council. They rarely make statewide news and routinely change a neighborhood’s trajectory, so track them alongside broader housing market trends.

Zoning and landlord-tenant questions turn into legal questions quickly. We’ll tell you what a rule generally does; for what it does to your specific parcel, talk to a Michigan real estate attorney before you write an offer.

What changed recently, and does it reach your file?

Usually it doesn’t. Changes generally apply to applications taken on or after their effective date, so a file already in process typically keeps the rules it started under. Here’s what actually landed recently, newest first.

• 2026 conforming loan limits: FHFA set the baseline for one-unit properties at $832,750, up $26,250 from 2025, effective January 1, 2026. Who it hits: borrowers who sat just above the old line and are now conventional rather than jumbo, which usually means easier reserve and credit requirements.
• 2026 FHA loan limits: HUD set the one-unit floor at $541,287 and the ceiling at $1,249,125, effective for FHA case numbers assigned on or after January 1, 2026. Who it hits: FHA buyers in higher-priced counties, and anyone who assumed FHA and conforming limits were the same number.
• Fannie Mae’s automated underwriting dropped its minimum credit score: For new Desktop Underwriter loan casefiles created on or after November 16, 2025, DU no longer applies the 620 minimum representative score and relies on its own risk analysis instead. A credit score still has to be on the file, and lenders keep their own minimums. Who it hits: thin-file and credit-rebuilding borrowers, but only at lenders that adopted the change without an overlay.
• A second approved credit score model: FHFA now permits approved lenders to choose between Classic FICO and VantageScore 4.0 on an interim basis for loans sold to Fannie and Freddie. Who it hits: almost nobody directly today. It matters later, when the model that scores your file changes.

Then there’s the rule most readers came for: a rate lock protects your pricing, not your eligibility. If your income, credit, or debt load changes mid-process, the lock holds your rate and nothing else. And the honest note, most publicized rule changes never touch a typical borrower’s file at all. What’s new in the mortgage industry and our breakdown of how new housing laws affect home buyers separate the headlines that matter from the ones that don’t, and the rate strategy hub covers exactly what a lock does and doesn’t cover.

What Michigan buyers and homeowners should know

Michigan diverges from the national picture on three of this hub’s four topics, and one of those differences shows up on your tax bill the year after you close.

• Rent control is preempted: Michigan law has barred local governments from enacting, maintaining, or enforcing an ordinance that controls the rent charged for private residential property since 1988. A Michigan “rent control” search leads to tenant-protection ordinances, notice periods, fee limits, source-of-income rules, not rent caps.
• Broader civil rights coverage: The Elliott-Larsen Civil Rights Act extends Michigan housing protections past the seven federal classes to include age, marital status, height, and weight, among others. The trade-off is timing: complaints to the Michigan Department of Civil Rights must be filed within 180 days of the act, versus one year under federal law.
• Zoning authority sits with townships and cities: Under the Michigan Zoning Enabling Act, counties, townships, cities, and villages each zone inside their own jurisdiction, and a township that has adopted its own zoning ordinance isn’t subject to the county’s. That’s why an ADU or lot split that’s routine on one side of a road can be prohibited on the other.
• Property tax uncapping: Under Proposal A, a transfer of ownership uncaps a property’s taxable value to its state equalized value in the calendar year following the transfer. The seller’s tax bill is not the bill you’ll pay, so build your escrow estimate off the uncapped number rather than the listing sheet.

We track this locally because we’re licensed in Michigan and place files here every week. A national lender’s guideline desk is generally not watching a township zoning amendment in Oakland County, and on a property-tax question, confirm the numbers with the local assessor and your tax professional before you budget around them.

FAQ: Mortgage industry updates and rules

Here are answers to common questions about mortgage industry updates and rules.

Does a new mortgage rule apply to a loan I already started?

Usually no. Guideline and program changes generally apply to applications taken on or after the effective date, so a file already in process typically keeps the rules it started under. A rate lock protects your pricing but not your eligibility, so a mid-process change to income or credit can still matter. Ask your broker to confirm the effective date in writing before you assume either way.

How often do Fannie Mae and Freddie Mac change their guidelines?

Roughly monthly. Both publish Selling Guide bulletins on a regular cadence, and individual lenders then decide when to adopt each change and whether to keep stricter overlays on top of it. That gap is why the same borrower can be declined by one lender and approved by another in the same week. See our guides to Fannie Mae guideline updates and Freddie Mac guideline updates for what’s changed lately.

What is the three-day rule on mortgage disclosures?

It’s two separate 3-business-day clocks. You must receive a Loan Estimate within 3 business days of submitting a complete application, and you must receive the Closing Disclosure at least 3 business days before you sign at closing. Certain changes, a higher APR, a loan product switch, or an added prepayment penalty, restart the second clock. Ask your loan officer to flag anything that resets it so your closing date doesn’t slip.

Who do I contact if I think a lender discriminated against me?

HUD. You can file a housing discrimination complaint with HUD’s Office of Fair Housing and Equal Opportunity, generally within one year of the incident, and lending complaints can also go to the CFPB. Michigan adds its own path through the Michigan Department of Civil Rights under the Elliott-Larsen Civil Rights Act, with a shorter 180-day filing window. Document dates, names, and what you were told before you file.

The bottom line on mortgage rules and industry updates

Four layers govern your loan, CFPB consumer rules, FHFA and the GSEs, the FHA, VA, and USDA program handbooks, and state and local law, and each one updates on its own calendar. The two numbers worth memorizing are federal: a Loan Estimate within 3 business days of applying, and a Closing Disclosure at least 3 business days before you sign. Everything else varies, especially lender overlays, which sit on top of the published rules and differ from one wholesale lender to the next.

If you’re ready to find out which lender’s current guidelines actually fit your file, talk to Align Lending, we’ll shop your scenario across our lender network and show you the numbers side by side. Call 248-506-5727 or start online today.

This article is for informational purposes only and is not intended to provide legal, financial, or tax advice. Program rules, loan limits, and effective dates change; verify current figures with the issuing agency and consult a qualified professional about your situation. Align Lending works with FHA- and VA-approved lenders and is not acting on behalf of, endorsed by, or sponsored by FHA, HUD, or the Department of Veterans Affairs.