If you’re buying a home in Lancaster County right now, the reassessment is probably somewhere on your radar. And fair enough — assessed values are jumping roughly 90% countywide, with some areas seeing increases well above that. Columbia Borough came in at over 140%. If you saw that headline and immediately wondered what it means for your tax bill when you buy, you’re asking exactly the right question.
The short answer: your taxes probably won’t jump 90%. But there’s a real wrinkle that matters specifically to buyers — one I’ve been walking clients through all summer. Here’s what you need to know before you make an offer on a home in Lancaster County.
The Big Myth: Higher Assessment Does Not Mean Higher Taxes
This is the one thing I want you to take away from this entire post.
Pennsylvania law requires every taxing body — the county, your municipality, and your school district — to adjust its millage rate downward in a reassessment year so the overall change is revenue-neutral at a countywide level. In plain terms: if assessed values across Lancaster County roughly double, millage rates will roughly halve. The total tax collected stays about the same across the county as a whole.
What changes is who pays more or less. If your home’s assessment increased more than the county average, you’ll likely pay more. If it increased less, you’ll likely pay less. Across all Lancaster County property owners, roughly a third will see their taxes go up, a third will stay about the same, and a third will actually see them decrease.
If you want the full breakdown for current homeowners — what the reassessment is, how it works, and what the new assessed values mean — I covered all of that in an earlier post here. For buyers, though, there’s a separate set of questions that doesn’t get talked about nearly enough.
The Buyer’s Problem: You’re Buying in an Uncertainty Window
Here’s the wrinkle. If you’re signing an agreement of sale right now — in July, August, or September of 2026 — you’re doing so before anyone knows what the new millage rates will be.
The county and municipal millage rates for 2027 won’t be set until December 2026. School district millage rates won’t be finalized until June 2027, when the reassessment takes effect for school taxes. That means you’re in a genuine window of tax uncertainty — you can look up the new assessed value, but you can’t calculate a precise 2027 tax bill.
This doesn’t mean you’re flying blind. It means you need to budget using a range, not a number. And it means you absolutely cannot use the seller’s current tax bill as a proxy for what you’ll pay.
That last point trips up a lot of buyers. A seller who bought their home in 2010 might be paying property taxes based on a 2018 assessed value that’s dramatically lower than both the home’s current market price and its new 2027 assessed value. Their number is history. It’s not your future.
How Property Taxes Work at Settlement in Pennsylvania
In Pennsylvania, property taxes are paid in arrears, which affects how they show up on your settlement statement.
Here’s the basic mechanic: at settlement, the seller credits the buyer for their prorated share of the current year’s taxes, calculated from January 1 through the settlement date. The buyer then takes responsibility for the remainder of the year.
For 2026 settlements, that proration uses the current (pre-reassessment) tax figures — the same millage rates and assessed values that have been in place. So your settlement statement reflects 2026 taxes, not 2027 taxes.
What your 2027 taxes will be is a separate question — and one nobody can answer with precision until the new millage rates are set. Your lender will typically establish a property tax escrow account based on estimated taxes, and that estimate will likely be adjusted once the 2027 millage rates are known. This is worth discussing with your lender before settlement so you understand how the escrow account might be affected.
For a full breakdown of what you’ll pay at settlement beyond taxes — lender fees, title insurance, transfer tax, and more — this post covers buyer settlement costs in Lancaster County in detail.
How to Budget for the Uncertainty
The uncertainty is manageable if you approach it the right way. Here’s what I walk every buyer through right now.
Step 1: Look up the new assessed value. The Lancaster County Assessment Office has already published new assessed values for every property in the county. Go to co.lancaster.pa.us and search by property address. You’ll see both the old and new assessed values side by side. Ask your agent to pull this for every property you’re seriously considering.
Step 2: Estimate your range using current millage rates. The simplest way to estimate the high end of your future tax range is to apply the current millage rate to the new assessed value. This is almost certainly an overestimate — because millage rates will be reduced — but it gives you a conservative ceiling. Your actual 2027 taxes will almost certainly be lower than this number, but by how much depends on your specific municipality and school district.
Different taxing bodies across Lancaster County will reduce their millage rates by different amounts. The county, your township or borough, and your school district are all separate taxing bodies. Each sets its own rate. A home in Manheim Township and a home in Hempfield Township can have very different effective tax changes even if their assessed values went up by the same percentage, because the underlying millage rates differ.
Step 3: Treat taxes as a range in your affordability math. Rather than plugging a single tax number into your monthly payment estimate, use a range. If the conservative estimate (current millage × new assessment) puts your annual taxes at $8,000 and you expect the actual number to be somewhat lower, build your budget around $7,000–$8,000 and understand the final number will clarify by December 2026. Your lender can model this for you.
Step 4: Ask about escrow adjustment. Most lenders will escrow property taxes as part of your monthly mortgage payment. Given the uncertainty around 2027 rates, ask your lender how they’re estimating the escrow figure and whether there’s likely to be an adjustment notice once new millage rates are set. Being informed upfront beats a surprise escrow adjustment letter six months after you move in.
How the Reassessment Can Actually Work in Your Favor
Here’s something buyers are less likely to hear: the reassessment can be a useful data point in your negotiations.
If you’re making an offer on a home and the new assessed value is significantly higher than what you’re paying — meaning the county thinks the home is worth more than your offer price — that’s a signal worth factoring in. Conversely, if the new assessed value is lower than the agreed purchase price, you may have grounds to appeal the assessment, potentially lowering your future tax burden.
The deadline to appeal 2027 assessments with the Lancaster County Board of Assessment Appeals is August 3, 2026 — which is just days away as of this writing. If you’re currently under contract and believe the new assessed value doesn’t reflect fair market value, don’t wait. I walked through the entire appeal process step by step in this post, including what evidence to gather and how hearings work.
If you miss this year’s deadline, future appeal cycles will open after the 2028 assessment cycle — but this year’s window is the one that resets the baseline for years to come.
What to Ask Your Agent Right Now
If you’re actively searching for a home in Lancaster County, here are the three questions you should be asking about every property you tour:
- What is the new 2027 assessed value? Your agent should pull this from the county assessment office for every home you’re seriously considering.
- How does that compare to the purchase price? A large gap in either direction is useful information — both for your tax estimate and for potential appeal grounds.
- What municipality and school district is this home in? Because millage rates vary, a home in one township can have meaningfully different tax math than a similar home a mile away across a township line.
For a deeper look at how property taxes are structured across Lancaster County — millage rates, how they’re calculated, and what drives the differences between municipalities — this post on Lancaster County property taxes covers the full picture.
The reassessment doesn’t need to derail your home search. But it absolutely needs to be part of your math. Buyers who factor it in now won’t have any surprises when 2027 rolls around. Buyers who don’t may find their monthly payments are higher than they expected — not because of anything their agent did wrong, but because they were working with an outdated tax number.
Frequently Asked Questions
Will the Lancaster County property reassessment make my taxes go up if I buy a home in 2026?
Not necessarily. Pennsylvania law requires taxing bodies to remain revenue-neutral in a reassessment year, so millage rates will be adjusted downward. Your 2027 taxes depend on how your home’s new assessed value compares to the county average — roughly a third of property owners will see taxes go up, a third will stay about the same, and a third will see a decrease.
How are property taxes prorated at settlement in Pennsylvania?
In Pennsylvania, property taxes are paid in arrears and prorated between buyer and seller at settlement based on the current year’s tax figures. For settlements in 2026, proration uses the existing pre-reassessment rates and assessed values. Your 2027 taxes — under the new millage rates — will be calculated separately and won’t be finalized until December 2026 for county and municipal taxes, and June 2027 for school district taxes.
When will buyers know what their actual 2027 property tax bill will be in Lancaster County?
Lancaster County and municipal governing bodies will set new millage rates in December 2026. School districts won’t finalize their new rates until June 2027. Until then, buyers can estimate a range using the already-published new assessed values from the Lancaster County Assessment Office, but a precise 2027 figure isn’t available until the millage rates are set.
Can I appeal my property assessment after buying a home in Lancaster County?
If you believe the new assessed value is higher than fair market value, you can file an appeal with the Lancaster County Board of Assessment Appeals. The 2027 appeal deadline was August 3, 2026. For future appeal cycles, check the Lancaster County Assessment Office at co.lancaster.pa.us for updated deadlines and instructions.
How do I look up the new assessed value of a home I’m considering buying in Lancaster County?
New assessed values are publicly available through the Lancaster County Assessment Office at co.lancaster.pa.us. Search by property address to see both the old and new assessed values side by side. Your real estate agent should be pulling this for any home you’re seriously considering, so you can estimate your future tax range before signing an agreement of sale.
The Lancaster County reassessment is one of the most significant property tax events this county has seen in decades — and it’s happening right in the middle of an already competitive buying market. Knowing how to factor it into your search, your offer, and your budget is part of buying smart in Lancaster County in 2026.
If you’re working through this for a specific property you’re considering, I’m happy to pull the new assessed value and walk through what it means for your numbers. Reach out anytime.
About Craig Hartranft
Craig Hartranft is a top-ranked Lancaster County REALTOR® and Founder of The Craig Hartranft Team, Berkshire Hathaway’s #1 real estate team in Lancaster County, with 460 homes sold and $195M+ in sales in 2025, plus over 1,400 five-star reviews across Google and Zillow.