Most affordability advice starts at the wrong end. It asks what price house you want, then tells you whether you qualify. That is backward. The number you actually live with is the monthly payment, and in Monroe County a large slice of that payment is not the loan at all. It is property taxes.

This post walks the math in the other direction. You pick a payment. You subtract the parts that are not principal and interest. What is left tells you how much you can borrow, and adding your down payment tells you the price band to shop. Every step is shown so you can redo it with your own numbers.

What rate should you run the numbers at?

Use 6.65 percent. That is the average 30-year fixed rate Freddie Mac reported in its Primary Mortgage Market Survey for the week ending August 20, 2026, down from 6.67 percent the week before. The same release put the 15-year fixed at 5.95 percent.

Two things worth knowing before you assume rates are about to rescue you:

• The 30-year sat at 6.69 percent for the week ending August 6, 2026, then 6.67 percent, then 6.65 percent. That is a narrow band, not a trend you can plan around.
• A year earlier, the comparable week came in at 6.58 percent. Rates are up about seven hundredths of a point year over year. Effectively flat.

Your quoted rate will differ from the survey average based on credit profile, loan type, points and lender. Run your own scenario at the number your lender puts in writing. Use 6.65 percent as the planning figure until you have that.

Step one: pick the payment, not the price

Write down the total monthly housing payment you can carry without changing how you live. That is PITI: principal, interest, taxes and insurance, plus PMI if you are putting less than 20 percent down. Lenders will approve you for more than that number. That is not the same as it being a good idea.

A practical way to set it: look at what you currently pay for housing, add what you have been saving each month, and stop there. If rent is $1,750 and you reliably bank $400, then $2,150 is a payment you have already proven you can handle.

Step two: subtract taxes and insurance first

This is the step people skip, and in Monroe County it is the step that moves the answer most. Property taxes here are a real line item, not a rounding error, and they vary meaningfully by town and school district. Henrietta, Pittsford, Brighton, Rush and Honeoye Falls do not carry the same rate, and the same $300,000 house can produce noticeably different monthly escrow depending on which side of a town line it sits on.

I am not going to publish a countywide average tax rate here, because I do not have a sourced current figure and a made-up one would wreck your budget. What I will tell you is how to get the real number in about five minutes:

• Pull the actual listing. Monroe County listings publish assessed value and the current combined tax bill.
• Divide the annual tax bill by 12. That is your monthly escrow for taxes.
• Add homeowners insurance. Get a real quote on a real address rather than guessing.
• If your down payment is under 20 percent, add PMI. Your lender will quote it as a percentage of the loan amount.

Do this for two or three specific houses in the towns you are considering before you settle on a price band. The spread will surprise you.

Step three: convert what is left into a loan amount

Once taxes, insurance and PMI are subtracted, the remainder is what can go toward principal and interest. At 6.65 percent on a 30-year fixed, principal and interest run approximately $643 per month per $100,000 borrowed. That single figure does most of the work.

To find your loan amount, divide your available principal and interest by 643, then multiply by 100,000.

These are principal and interest only. Taxes, insurance and PMI sit on top. That is the whole point of subtracting them first.

Step four: add your down payment

Loan amount plus down payment equals purchase price. Simple arithmetic, but worth spelling out because it is where the price band finally appears.

Worked example. Say your comfortable all-in payment is $2,150. You are looking in a town where the tax bill on the houses you like runs about $6,600 a year, which is $550 a month. Insurance quotes at $95 a month. You are putting 10 percent down, and PMI comes in around $95 a month on the loan size you are targeting.

• $2,150 total payment
• minus $550 taxes
• minus $95 insurance
• minus $95 PMI
• leaves $1,410 for principal and interest

$1,410 divided by 643, times 100,000, is a loan of roughly $219,000. At 10 percent down, that supports a purchase price near $243,000. Your down payment in that case is about $24,300, and closing costs are separate on top of it.

Change one input and watch the price move. Same $2,150 payment in a town where the tax bill is $4,800 instead of $6,600 frees up $150 a month, which buys roughly $23,000 more house. Taxes are not a footnote in Rochester. They are a shopping criterion.

Does that price band actually buy anything in Monroe County?

It depends on the number you land on and where you look. The most recent well-sourced county figure I have is a Monroe County median sale price of $308,500 for May 2026, a record high, from NYSAR data reported by the Rochester Business Journal on June 26, 2026. Median list price for the same month was $319,900, per Realtor.com data via FRED. Those two measure different things, so do not treat them as interchangeable.

For a broader sense of value levels, Zillow's Home Value Index put Monroe County at $285,439, up 4.1 percent year over year, and the city of Rochester at $252,192 as of June 30, 2026, up 4.3 percent. ZHVI is a modeled index rather than a median of actual sales. Useful for direction, not for pricing a specific house.

If your math produces a band under the county median, you are not shut out. You are shopping in a different part of the county, or a smaller footprint, or a house that needs work. If your band lands above it, you have more room than the headline suggests.

What the calculators leave out

An affordability calculator for Monroe County will give you a number in ten seconds. Here is what it will not tell you.

• Speed. Zillow reported homes in the city going pending in around eight days as of June 30, 2026. A price band you can only hit by stretching is a band you will lose in, because you will hesitate.
• Assessment changes. Your tax escrow is based on the current assessment. That can move.
• Housing stock age. Realtor.com's December 2025 forecast piece cited a median home age of 1966 for the Rochester market. Older houses can mean roofs, furnaces and knob-and-tube surprises. Leave room in the budget that is not the mortgage payment.
• Down payment norms. That same forecast cited an average down payment of 15.9 percent and an average borrower FICO of 744 for the Rochester market. Useful context for what competing offers often look like.
• Closing costs. Separate from the down payment. Budget for them explicitly.

How much house can I afford in Rochester NY if I only have 5 percent down?

You can still buy, and the math above works the same way with a different last step. A smaller down payment does three things at once: it raises the loan amount for a given price, it adds PMI to the monthly payment, and it usually means a slightly higher rate. All three push your affordable price down, so the honest comparison is not 5 percent versus 20 percent on the same house. It is 5 percent versus 20 percent on the same payment.

Run both. Then decide whether waiting to save more is worth it, given that Monroe County's median sale price hit a record in May 2026 and Zillow's index showed roughly 4 percent annual value growth as of mid-2026. Sometimes waiting wins. Sometimes the market moves faster than the savings account. Nobody can tell you which in advance, and anyone who says they can is selling something.

Get a lender number before you shop

Everything here is planning math. It is close enough to set a price band and rule out towns, and it is not a substitute for a pre-approval. Get a lender to put a rate, a loan amount and an estimated monthly payment in writing. Then take the specific tax bill from a specific listing and rebuild the payment. That is the number that matters.

Common questions

What is the monthly payment on a $300,000 mortgage at 6.65 percent?

Principal and interest run roughly $1,930 a month on a $300,000 loan at 6.65 percent over 30 years, based on the approximate $643 per $100,000 figure. Property taxes, homeowners insurance and PMI are all additional. In Monroe County those additions frequently push the total well past $2,400, depending on the town and school district.

How much do property taxes affect what I can afford in Monroe County?

A lot, and more than most buyers expect. Because taxes are escrowed into the monthly payment, every $100 a month of tax is roughly $15,500 of purchase price you can no longer borrow at 6.65 percent. Two houses at the same price in different Monroe County towns can carry different monthly payments for that reason alone. Always pull the actual tax bill from the listing rather than using an average.

Are mortgage rates likely to drop soon?

Nobody knows, and the recent record does not suggest a fast move. Freddie Mac's survey showed the 30-year fixed at 6.69 percent for the week ending August 6, 2026, 6.67 percent the following week, and 6.65 percent for the week ending August 20, 2026. A year earlier the comparable week was 6.58 percent. Plan at today's rate and treat any drop as a refinance opportunity, not a purchase strategy.

Should I use an online affordability calculator for Monroe County?

Use one to get a rough starting point, then correct it. Most calculators apply a generic tax estimate, and generic estimates do not reflect Monroe County's town-by-town variation. Replace the tax field with the real annual bill from an actual listing, replace the insurance field with a real quote, and add PMI if you are under 20 percent down. The result will usually be lower than the calculator's first answer, and it will be the true one.

What is the median home price in Monroe County right now?

The best-sourced recent figure is a median sale price of $308,500 for May 2026, a record high, from NYSAR data reported by the Rochester Business Journal in June 2026. Median list price that same month was $319,900 per Realtor.com data. Sale price and list price measure different things, so compare like with like when you are judging whether an asking price is reasonable.

Run your numbers with someone who has been in these houses

If you want help turning a payment into a real price band, including pulling actual tax bills for the towns you are considering, reach out. I will walk the math with you and tell you plainly what your number does and does not buy in Henrietta, Pittsford, Brighton, Mendon, Rush, Honeoye Falls and the surrounding area. Schedule a time with Khem Kadariya.

About this data

The figures in this post were compiled from publicly available sources including Houzeo, Movoto, Zillow, RochesterFirst and the Rochester Business Journal, along with other public market data. Real estate numbers change quickly, and these were accurate as of August 2026. For current figures on a specific home, street, or town, ask me directly rather than relying on a published average.