Montgomery County sits at the plain national conforming baseline, which puts the one-unit ceiling at $832,750 for 2026. Because the limit applies to the loan and not to the price, the price at which a purchase turns into a jumbo depends entirely on how much is going down.
Where the line actually falls
| Down payment | Purchase price where jumbo begins |
|---|---|
| 20% | about $1,040,900 |
| 10% | about $925,300 |
| 5% | about $876,600 |
Those are the prices at which a one-unit loan first clears $832,750. Below them the loan is conforming and jumbo underwriting never enters the conversation. The limits were read 26 August 2026 from the housing finance agency’s county file, where Montgomery County appears as FIPS 42-091.
The Main Line included
Bryn Mawr’s median sale in July 2026 was $875,000. Twenty percent down on that is a $700,000 loan, comfortably conforming, with $132,750 of room before the ceiling. So the assumption that a Lower Merion Township address means jumbo paperwork is wrong more often than it is right, and it is worth checking before it steers somebody into the wrong product or talks them out of a house.
The same holds in Whitpain, Lower Gwynedd, Upper Dublin and Whitemarsh. Do the arithmetic on the actual loan amount before deciding what kind of loan it is.
Two and three units push it further out
Conforming limits rise with the unit count: $1,066,250 on two units and $1,288,800 on three in Montgomery County this year. A three-unit building priced at $1.2 million is inside the conforming ceiling outright. Whether the rental income works, and what reserves are wanted, is the lender’s territory and has nothing to do with the limit.
Why the confusion is so widespread
Two federal agencies use the same words for different things. FHA tags the Philadelphia-Camden-Wilmington metro as limit type H, which in FHA’s vocabulary means only that its $630,200 limit sits above the national floor of $541,287. That is not the high-cost designation the housing finance agency assigns for conforming purposes. Of 3,236 counties nationwide, 164 carry above-baseline conforming limits, and Pike County is the only one in Pennsylvania — it holds a New York metro figure forward from an older rule. Montgomery County has never been on that list.
What changes once you are genuinely over the line
A jumbo is not bought by Fannie Mae or Freddie Mac, so its rules belong to whoever is holding the loan. In practice that means the documentation is heavier and the standards are set by the individual lender instead of by a rulebook you can look up. The lender decides whether to lend and on what terms, and this page is not an offer of anything.
The tax side of a bigger price
Realty transfer tax is 2.000% at every address in Montgomery County, and it scales with the price like everything else does. On a $1,040,900 purchase that is $20,818 across the settlement table, customarily split half each, with both parties jointly and severally liable and the agreement of sale deciding the actual split.
The annual side is more local. Lower Merion Township totals 47.273 mills, of which the school district takes 36.5017 for 2026-27, up from 35.2674 the year before. The district publishes the household version of that increase: on its median assessment of $250,680, the school bill went from $8,841 to $9,150. Lower Merion is also one of only two municipalities in the county levying no earned income tax at all, municipality and school district both at zero, which is worth several thousand dollars a year to a household at Norristown’s 2.10% rate.
Narberth, sitting inside Lower Merion School District, totals 52.319 mills instead of 47.273, because the borough levies its own municipal rate. That is a five-mill difference on the same school district, half a mile apart.
All of these read against a 1996 assessment base. The Common Level Ratio factor for documents dated 1 July 2026 through 30 June 2027 is 3.36, so assessed value is roughly market value divided by 3.36, and a recent purchase price well under the value that ratio implies is the strongest assessment appeal evidence there is. Annual appeals are due 1 August; the fee on a single-family house is $50, and the paperwork is the same size whatever the house cost.
What to do next
Work out the loan amount, not the price, and see which side of $832,750 it lands on. Call the line, or put it in the form and send it along, and a licensed Pennsylvania mortgage lender calls you back to confirm which product the number actually needs. Quite often the answer is that nothing unusual is needed at all.