The average 30-year fixed mortgage rate jumped to 6.95% on Sept. 17, up from 6.76% a week earlier, according to Freddie Mac. For agents working with payment-sensitive buyers, that increase can quickly change which homes—and which neighborhoods — still fit within budget.
A recently introduced ZIP-code affordability tool adds a more local view. Based on estimated values for more than 100 million homes, it shows the share of homes in each ZIP code that falls within a given price limit. Nationally, a $250,000 budget reaches 28% of existing homes, while $418,000 reaches 58%.
The tool does not replace a lender’s preapproval or an agent’s local market data. Used alongside both, it can help narrow the search to areas where the buyer’s budget covers a larger share of the housing stock.
Confirm the buyer’s budget
Start with the buyer’s current lender information rather than a broad income-based affordability rule. Down payment, debt, loan terms and the mortgage rate available to that borrower can all change how much house the client can comfortably carry.
Clarify whether the buyer wants to search at the lender’s maximum approved price or below it to preserve a preferred monthly payment. Those numbers can lead to very different searches once taxes, insurance and HOA fees are included.
Check the preapproval date as well. Letters typically expire within 30 to 60 days, although lender practices vary. Buyers who paused their search may need updated numbers before comparing ZIP codes.
Compare affordability by ZIP code
Once the budget is current, compare the areas the client is seriously considering rather than relying on a citywide or metro median. The differences can be substantial even within one city. At an $800,000 budget, the recent analysis found that only about 1% of homes in Battery Park City fall within range. In parts of Staten Island and the Bronx, nearly all homes do.
That gives agents a more precise way to frame the search. A first-time buyer may find that expanding by a few ZIP codes opens more options, while a relocation client can see how the same budget translates across unfamiliar parts of a market.
Check live inventory and monthly costs
The ZIP-code percentages describe estimated values across the existing housing stock. They are not a count of homes currently listed for sale.
Current supply still needs to come from the MLS. Nationally, active listings were up 5% year over year for the week ending Sept. 12, but conditions can differ sharply from one ZIP code to another.
Check active homes within the client’s range, recent listings, days on market and price reductions before setting expectations. A ZIP code can look affordable on paper while offering few viable listings at a given moment.
Then run the monthly costs. Property taxes, homeowners insurance, HOA dues and mortgage insurance, when applicable, can push two similarly priced homes to very different monthly payments. Purchase price alone does not show what the buyer will actually carry.
Adjust the search
Bring the three pieces together: the buyer’s current financing, the share of local homes within budget and what is actually available now. From there, the client can decide whether to widen the radius, adjust the price range, reconsider property requirements or keep the search unchanged. Record those decisions in the CRM and update saved searches to match.
The ZIP-code percentage is most useful as a starting point. Combined with current financing and live inventory, it can help agents build a search around where a buyer’s budget has the strongest practical fit.