Current conventional guidelines, updated from one source.
The block below is the conforming rulebook reduced to the figures that decide a file, read from Lendmire’s single guideline source and refreshed on this page when the agencies or the wholesale overlays change: the down payment by buyer, the credit floor, the mortgage insurance threshold and its cancellation points, and the ratio maximums.
First-time buyer; 5% standard; 97% loan-to-value at the top
3% down is the first-time buyer’s entry point and 5% the standard one, both on a one-unit principal residence; second homes, two- to four-unit homes, and investment properties carry their own leverage limits, listed in the table below.
Priced on the score; no agency minimum with an automated approval
The wholesale programs behind these pages start at a 620 decision score. The agencies themselves set no minimum for an automated approval and ask for 620 on a manually underwritten fixed-rate loan and 640 on an adjustable; the score prices the loan and the insurance more than it gates them.
Required above 80% LTV; removed at 80% by request, 78% automatically
Private mortgage insurance applies above 80% loan-to-value. Fannie Mae’s 2022 figures put the annual cost in a range of 0.58%–1.86%, depending on the score and the leverage. It ends by request at 80% of the original value, automatically at 78%, and no later than the midpoint of the term.
With an automated approval; 36% to 45% on a manual file
An automated approval allows a total debt-to-income ratio up to 50%; a manually underwritten file is held to 36%, or 45% when credit score and reserves meet the agencies’ matrix. The ratio divides total housing payment plus other monthly obligations by gross income.
| Purpose | Occupancy and program | Maximum LTV |
|---|---|---|
| Purchase | One-unit principal residence, first-time buyer (fixed rate) | 97% |
| Purchase | One-unit principal residence, standard | 95% |
| Purchase | HomeReady / Home Possible (income limits apply) | 97% |
| Purchase | Two- to four-unit principal residence | 95% |
| Purchase | Second home | 90% |
| Purchase | Investment property, one unit | 85% |
| Purchase | Investment property, two to four units | 75% |
| Refinance | Limited cash-out (rate-and-term), one-unit principal residence | 95% |
| Refinance | Cash-out, one-unit principal residence | 80% |
| Refinance | Cash-out, two to four units, second home or investment | 75% |
| Combined LTV | Maximum contribution |
|---|---|
| above 90 percent | 3% of the sales price |
| 75.01 to 90 percent | 6% of the sales price |
| 75 percent or less | 9% of the sales price |
| investment property (any) | 2% of the sales price |
| Event | Waiting period |
|---|---|
| Chapter 7 or 11 bankruptcy | four years from discharge or dismissal (two years with documented extenuating circumstances) |
| Chapter 13 bankruptcy | two years from discharge; four years from dismissal (two with extenuating circumstances) |
| Multiple bankruptcy filings | five years when more than one filing within the past seven years |
| Foreclosure | seven years (three with extenuating circumstances, then limited to a principal residence or second home at 90 percent LTV, purchase or limited cash-out) |
| Deed-in-lieu, short sale or mortgage charge-off | four years (two with extenuating circumstances) |
Mortgage insurance: Fannie Mae reports that private mortgage insurance typically ranged from 0.58%–1.86% of the loan amount a year; the premium on a specific loan is priced by the insurer on the score, the leverage, and the coverage, and is never quoted here. Gifts from relatives may fund the entire down payment on a one-unit principal residence. HomeReady and Home Possible lend to 97% with income at or below 80% of the area median; HomeOne lends to the same leverage with a first-time buyer and no income limit.
Current conventional snapshot · updated October 3, 2026 · principal residences occupied within sixty days, second homes, and one- to four-unit investment properties · conforming limits apply by county and are confirmed by a Lendmire loan officer · above the limit, see the jumbo program · no prepayment penalty · Lendmire is a broker, never the lender.
For informational purposes only. This is not a commitment to lend or extend credit, an offer, or a quote. Program parameters shown are Fannie Mae and Freddie Mac guidelines and wholesale lender overlays, are subject to change without notice, and every figure depends on the borrower, the property, the occupancy, the automated underwriting finding, and full underwriting. Mortgage insurance figures are published typical ranges and editable estimates, not premium quotes. Conforming loan limits apply by county. Lendmire is a mortgage broker, not a lender. Licensed in sixteen states for consumer mortgages. NMLS #2371349.
What a conventional loan is — and how the file is qualified.
A conventional loan is a mortgage written to the rules of Fannie Mae and Freddie Mac so a lender can sell it to them after closing. Those rules decide the leverage by occupancy, the credit standard, the insurance above the threshold, and the ratios, and the four cards below take a San Mateo file apart along exactly those lines.
For the program overview, see Lendmire’s conventional loan program, or the statewide guide at Conventional Loans in California; for the mortgage insurance cancellation rules, see the CFPB.
Leverage by occupancy and buyer
The agencies lend most on a home the borrower lives in and less as the occupancy changes: a one-unit principal residence reaches the top leverage, with the first-time buyer’s minimum the lowest down payment in the program; two- to four-unit homes, second homes, and investment properties step down from there, as the table in the snapshot shows for a San Mateo buyer.
Credit scores and automated underwriting
The automated system, DU on the Fannie Mae side and LPA on the Freddie Mac side, reads the whole credit file rather than a single number: the score, the depth of history, the recent events, and the seasoning after any derogatory event. The score it uses with more than one borrower is the average of the median scores.
Mortgage insurance that cancels
Twenty percent down means no mortgage insurance at all, and anything less means insurance for a while. The calculator on this page shows the San Mateo payment with the estimated premium and the payment after it ends, along with the month on the amortization schedule when the request and automatic thresholds arrive.
Ratios, reserves, and the DU finding
Total debt-to-income is the ratio that counts: the full housing payment, insurance included, plus every monthly obligation, against gross income. Automated approvals reach the higher ceiling in the snapshot; manual files are held to the lower pair, with the higher of the two needing the matrix’s credit and reserve criteria.
The calculator runs this on a San Mateo scenario and adds the piece most calculators skip: the month on the amortization schedule when the balance reaches the request and automatic-termination thresholds, so the payment after the insurance ends is visible beside the payment before.
Where San Mateo buyers borrow — and how a conforming loan fits.
Start with the market, then the file. The San Mateo figures below set the backdrop for a conventional purchase: who owns, what homes are worth on the latest estimate, and what households earn, which together decide what a first-time buyer’s down payment and payment look like locally.
Market context only. Read the figures as ranges, not predictions. The lender appraises one home, documents one income, and lets the automated system read one credit file.
Data sources: U.S. Census Bureau — ACS 5-Year (2024) housing and population estimates, including tenure, home values, gross rents, and household income.
Distinct San Mateo neighborhoods, distinct conventional files.
One program, several San Mateo submarkets: the cards below describe the housing stock, the price range, and the conventional question that comes up most often in each.
Two-to-four-unit homes
The owner-occupied multi-unit San Mateo file is a conventional specialty with its own leverage, its own rent-counting rules, and its own reserve requirement. The buyer in one unit qualifies on the combined picture. Roughly 19,910 San Mateo households own their homes on the latest Census estimate — 50% of all households, the pool a conventional purchase joins.
Investor and second-home purchases
An investor buying a San Mateo unit to rent uses the conventional program at the investment leverage, documents the rent the agencies allow, and shows reserves for every financed property; the agencies cap how many such loans one borrower may carry. About 50% of San Mateo’s households rent — roughly 19,985 renter households on the latest Census estimate.
Condominiums and townhomes
Much of San Mateo’s entry-level stock is attached housing, and a conventional loan finances it whenever the project is warrantable under the agencies’ review. The dues go into the ratio, and the first-time buyer’s minimum applies as it would on a house. San Mateo is home to about 103K people and sits within the San Francisco-Oakland-Fremont, CA area.
Established close-in neighborhoods
The San Mateo blocks nearest the core carry the oldest houses, and a conventional appraisal reads them for value first and condition second: no HUD or VA property standard, but the home must be safe, sound, and marketable, and a failing roof or system still draws a condition note. Median household income in San Mateo sits near $153,504 on the latest Census estimate.
Newer infill and recent construction
On recent construction in San Mateo the appraisal is usually uneventful and the arithmetic decides: whether the loan fits under the conforming limit, and whether the ratio carries the price once the insurance is added at the leverage chosen. On a one-unit principal residence at San Mateo’s median value, the first-time buyer’s minimum down payment comes to about $48,600 and the standard minimum to about $80,900 — before closing costs, and before the mortgage insurance that comes with either; a second home, a multi-unit home, or a rental starts higher, as the leverage table shows.
Higher-value homes
A high-value San Mateo purchase can still be a conforming loan when the loan amount fits under the county limit, and a high-cost county’s higher range extends that reach; above it, the jumbo program takes the file with its own leverage and reserves. The median owner-occupied home value in San Mateo runs near $1,618,700 on the latest Census estimate.
Each San Mateo submarket has its own property story, and the appraisal and the project review are where that story is told. The leverage limits, the cancellation rules, and the automated finding are the constants.
Four ways San Mateo buyers put a conforming loan to work.
Because the agencies buy loans on principal residences, second homes, and investment property alike, the conventional loan is a program a San Mateo household can use for every home it owns. Four examples follow.
Buy with twenty percent down and no insurance
The move-up San Mateo buyer selling one home and bringing twenty percent to the next usually lands here: no mortgage insurance, the strongest cost tier the score earns, and a loan the automated system reviews with the equity brought forward counted in the file.
Buy a second home
Conventional financing is the consumer program that reaches a second home: a San Mateo buyer brings the down payment the leverage table shows for that occupancy, qualifies on the full payment of both homes, and shows the reserves the finding requires. The home must be for the owner’s use, not a rental business.
Buy a first home at the first-time-buyer minimum
A San Mateo buyer who has not owned a home in three years qualifies for the program’s smallest down payment on a one-unit principal residence with a fixed rate; the down payment can be a gift from a relative, the seller can pay closing costs within the cap, and the insurance cancels as equity grows.
Buy a condominium in a warrantable project
A San Mateo condominium is a conventional purchase when the project passes the agencies’ review: owner-occupancy mix, budget and reserves, litigation, commercial space, and ownership concentration. The dues enter the ratio, and the leverage follows the occupancy as it would on a house.
Estimate the payment on a San Mateo price before requesting a quote.
This is what a San Mateo conventional purchase costs each month at the leverage you choose, with the insurance shown as a separate line and then removed: the calculator finds the month on the schedule when the balance reaches the request threshold and the month it reaches the automatic threshold, and shows the payment on each side. The rate shown is the weekly Freddie Mac average, editable, and not a quote.
San Mateo conventional payment estimate
Use the San Mateo defaults as a starting point and change the price, the down payment, the buyer type, the term, the insurance estimate, and the escrows to fit.
Editable benchmark: 7.28% as of October 1, 2026 · Freddie Mac 30-year average via FRED®. A conventional market reference, not a conventional loan quote.
Estimate seeded at the low end of Fannie Mae’s published range (0.58%–1.86% a year); the insurer prices the actual premium on the score and the leverage. Applies only above 80% loan-to-value.
Illustrative starting assumptions: a $750,000 price (the highest price the example uses, which sits below San Mateo’s median owner-occupied home value), the first-time buyer’s minimum down payment, a thirty-year term at the current Freddie Mac benchmark, mortgage insurance at the low end of Fannie Mae’s published range, property taxes and insurance estimated for California (U.S. Census Bureau). 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 conventional loan quote; your rate is set by the lender at lock. The mortgage insurance figure is an editable estimate seeded from Fannie Mae’s published typical range, not a premium quote; the insurer prices the actual premium, and the cancellation month assumes scheduled payments with no extra principal and no change in value. Taxes, insurance and dues are editable estimates; closing costs are not included. Conforming loan limits apply by county. Licensed in sixteen states for consumer mortgages.
Same buyer, three very different closings.
Most buyers can close the same purchase three ways, and the structures differ more than the labels suggest: conventional with insurance that cancels, FHA with a small investment and premiums for the life of the loan at full leverage, or VA with nothing down and no insurance for the eligible veteran.
Conventional, FHA, or VA.
The program’s strengths are the cancellable insurance, the breadth of occupancies, and a cost structure that rewards a strong score; its weakness is the same structure applied to a weak one. A San Mateo buyer with a strong score usually pays less each month here than on FHA.
FHA’s leverage is high and its credit standard is forgiving, but its insurance is priced by schedule rather than by score and does not cancel on a full-leverage thirty-year loan. A San Mateo buyer comparing the two sees the premium line stay on FHA and disappear on conventional. See Lendmire’s FHA loan program.
For an eligible veteran, service member, or surviving spouse, the VA loan drops the down payment and monthly insurance for a one-time funding fee that many disabled veterans do not pay. Where eligible, it usually beats conventional for a San Mateo principal residence; conventional still wins the second home and rental. See Lendmire’s VA loan program.
Choose by profile: a strong score and any down payment point to conventional; a modest score and a small down payment point to FHA; eligibility with full entitlement points to VA. A San Mateo loan officer runs all three on the same numbers before recommending one. Above the conforming limit, see the jumbo loan program.
What to prepare for a San Mateo scenario review.
What a lender reads on a San Mateo conventional loan, and what you can have ready before anyone asks.
This is a general preparation guide, not a universal checklist. The selected lender may request additional information based on the transaction, the property, the automated underwriting finding, and the income picture. Nothing here is legal or tax advice.
Local details that can change the loan.
Check these before leaning on any number for San Mateo: the mortgage insurance structure and when it ends, the score and what it costs, the appraisal, the condominium review, the conforming limit, the ratio and reserves, and the occupancy.
Use these checks to keep the San Mateo file clean and fundable.
Before asking for a quote, know three answers: how much insurance the leverage carries and for how long, what the score does to the price, and whether the property and the loan amount fit the conforming program.
- Plan the insurance: the premium is priced on the score and the leverage inside the published range.
- Confirm the score: a self-pulled score can differ from the decision score.
- Check the project: the project must pass the agencies’ review to be warrantable.
Mortgage insurance: how much, and until when
The premium on a San Mateo loan can be paid monthly, paid by the lender in exchange for a different price, paid as a single premium at closing, or split. The monthly structure cancels under the federal rules, and the others are set by the lender. The calculator shows the monthly structure and the month the thresholds arrive on scheduled payments.
The score sets the cost
The score does two jobs on a San Mateo file: it feeds the automated assessment alongside the rest of the credit file, and it sets the cost of the loan and the insurance. A buyer close to a cost tier sometimes gains more from a short wait and a paid-down balance than from any other change.
Warrantable or not
A San Mateo condo is a conventional purchase when the project passes agency review: owner-occupancy mix, budget and reserves, litigation, commercial space, single-entity ownership, and insurance. One that fails is non-warrantable and outside the conforming program; a portfolio lender may still lend on other terms.
Second homes, rentals, and financed-property limits
A San Mateo household can hold several conventional loans at once, but each financed property adds reserves to the next file and the agencies cap the number of financed properties a borrower may have. Second homes and rentals are leveraged lower than a principal residence and priced for the occupancy.
Seller contributions and the down payment
A San Mateo contract can shift most closing costs to the seller inside the cap for the leverage, which leaves the buyer bringing the down payment and little else. On second homes and two- to four-unit homes above the threshold, part of the down payment must be the buyer’s own funds.
From a San Mateo pre-approval to keys in hand.
A conventional purchase runs in a fixed order: pre-approval through the automated system on the score, the ratio, and the reserves; contract and appraisal or value acceptance; underwriting that verifies what the finding assumed; and closing with the insurance structure set. Here is that order for a San Mateo buyer.
Pre-approval
A San Mateo pre-approval is a sizing exercise run through the automated system: the score, the income, the assets, the occupancy, and the price. The finding sets the ratio room and the reserves, and the loan officer puts the pre-approval in writing for the offer.
Contract and appraisal
The appraisal is a valuation first and a condition report second on a conventional file; a short value re-sizes the loan, and the San Mateo contract is adjusted or released under its contingency. Where the system offers value acceptance, the step collapses to the system’s figure.
Underwriting
Underwriting on a San Mateo conventional file verifies the finding: the documents behind income and assets, the source of the down payment, the project review, and the insurance commitment for the leverage. Conditions are cleared and the approval is issued with its terms.
Closing
The San Mateo closing applies the program’s structure: the insurance premium in the payment while it applies, the escrow account, and no upfront premium on the monthly structure. The buyer moves in within sixty days on a principal residence, and the servicer tracks the balance toward the cancellation thresholds.
A brokerage that prices the whole market.
The case for a brokerage on a conventional loan is candor with numbers: the same file priced across programs, the insurance premium and its cancellation month stated outright, the leverage checked against the occupancy, and the terms in writing.
Several programs, one set of numbers
Before any recommendation, the San Mateo file is priced across the wholesale programs Lendmire works with and run against FHA and VA on the same price, score, and down payment. The buyer sees the payment, the insurance line, and the cash to close for each, and the choice follows the figures.
The insurance explained before the offer
No San Mateo buyer should learn at the closing table what the insurance costs or how long it lasts. The loan officer walks through the premium for the leverage chosen, the month the thresholds arrive on scheduled payments, and the alternative of a larger down payment.
Licensed, consumer-purpose, in writing
Lendmire carries the license for the state the San Mateo home is in, delivers the disclosures a consumer mortgage requires, and commits the terms to paper. The program figures on this page are read from one guideline source built on the agencies’ published guides.
Trusted by buyers & families alike.
San Mateo conventional loan FAQs
Plain answers to the questions San Mateo buyers ask most about conventional loans, in the order they usually ask them.
What is a conventional loan, and who is it for?
The general-purpose mortgage: conforming to the agencies’ guides, priced on the credit score, insured privately only while the leverage is above the threshold. It is the program most San Mateo buyers compare first and, of the three compared here, the one that reaches a second home or an investment property.
How much do I need to put down on a conventional loan in San Mateo?
The snapshot shows the minimums: one for the first-time buyer, one for everyone else, both on a principal residence. The calculator applies either to a San Mateo price, and the leverage table gives the figure for second homes and investment property.
What credit score do I need for a conventional loan?
The floor in the snapshot opens the program; the score above it sets the cost. With more than one borrower the automated system uses the average of the median scores, and a San Mateo buyer close to a cost tier may gain from a short wait and a paid-down balance.
How does private mortgage insurance work, and when does it end?
The premium is a percentage of the loan a year, divided into the monthly payment, and it is set by the insurer on the score and the leverage rather than by a government schedule. It cancels: by request at the request threshold, automatically at the termination threshold, and no later than the midpoint of the term.
What is the conforming loan limit in San Mateo?
The limit is the first thing confirmed on a San Mateo file near the top of the market. These pages state the program’s structure rather than a number that changes every year; the current figure comes from a loan officer.
What debt-to-income ratio does a conventional loan allow?
Two paths, all of them total ratios: a single higher ceiling for a file the automated system approves, and for manual underwriting a lower figure, with a higher one available when the matrix’s credit and reserve criteria are met. The housing payment counted includes the insurance while it applies, which is why cancellation lowers the ratio as well as the payment.
Can I buy a rental property with a conventional loan?
Investment property is inside the conventional program at a lower leverage than a principal residence. A San Mateo buyer documents the rents, shows reserves for every property financed, and accepts loan-level adjustments for the occupancy.
Should I choose a conventional loan or FHA?
Conventional tends to fit the buyer with a strong score, because its insurance cancels and carries no upfront premium; FHA tends to fit the buyer with a modest score, because its ratios stretch further. The answer for a San Mateo buyer comes from the numbers, not the label.
Can the seller pay my closing costs on a conventional loan?
Within the cap for the combined loan-to-value, yes: closing costs, prepaids, and points. The down payment is separate and must be the buyer’s own funds or a gift; the seller can cover the rest up to the cap.
Can I take cash out with a conventional refinance?
A conventional cash-out refinance replaces the first mortgage with a larger loan at the cash-out leverage and hands over the difference. A San Mateo owner with a low-balance first mortgage usually compares a second lien first.
A San Mateo conforming loan, from the first numbers to the closing table.
Put your San Mateo figures into the calculator, then ask for a review. The leverage, the insurance structure, the cost tier, and the conforming limit are confirmed against the agencies’ rules, and a licensed loan officer provides the terms in writing.
This guide covers San Mateo — for the statewide guidelines, markets, and scenarios, see Conventional Loans in California, part of Lendmire’s conventional loan program.
Nearby markets in California: Redwood City · South San Francisco · Hayward · San Leandro · Alameda · Daly City · Palo Alto · Oakland
Related programs: FHA Loans · Jumbo Loans · Refinance Loans