What the current owner pays is frequently not what you will pay, because many jurisdictions reassess on sale. Calculate your likely bill from the purchase price and the combined local rate, and check which exemptions the seller holds that will not transfer to you.
The running cost buyers most consistently get wrong, because they look at what the current owner pays. In many places that figure has nothing to do with what you will pay.
Property tax is the running cost buyers most consistently get wrong, because they look at what the current owner pays. In many places that figure has almost nothing to do with what the next owner will pay.
This is general information. Assessment rules vary considerably by state and locality, and the specifics matter enormously.
Many jurisdictions reassess a property when it changes hands, resetting the assessed value to something reflecting the sale.
Where a property has been held for a long time under a system that limits annual increases, the current assessment can sit far below market value. The seller may be paying on a figure set decades ago. You will not be.
Others reassess periodically for everyone, or use a system where sale prices influence assessment more gradually. The mechanism differs and so does the size of the change.
Establish which applies before you buy, and calculate what your bill will actually be rather than reading the listing.
Ask the local assessor's office directly. Most will explain how reassessment works and how the calculation is made.
Take the likely purchase price, apply the local assessment ratio if one is used, then apply the combined rate — which frequently includes county, municipal, school and special district levies rather than a single figure.
Check for anything attached to the specific parcel. Bond measures, improvement districts and special assessments can add materially and do not appear in a headline rate.
The current owner may be benefiting from something you will not receive.
Homestead exemptions, senior or veteran reductions, agricultural or conservation classifications, and various caps on annual increases are frequently tied to the owner rather than the property.
Agricultural classification is worth particular attention on land. Losing it can raise the bill dramatically, and in some places changing the use triggers a rollback covering several prior years.
A sale, usually. But also, in many places, significant improvements or new construction.
A buyer planning a substantial renovation should establish how that will affect assessment. Adding square footage or major systems can trigger a partial reassessment, and the increase persists.
Transfers between family members, into trusts, or between entities are treated differently in different places. Some are excluded from reassessment, others are not, and the distinction is worth understanding before restructuring anything.
Assessments can be challenged, and the process is more accessible than most owners assume.
Grounds usually include an assessment above market value, an error in the recorded characteristics of the property, or inconsistency with comparable properties.
Deadlines are strict and typically fall shortly after assessment notices are issued. Missing the window means waiting a full cycle.
On a large property the sums involved frequently justify professional help with an appeal.
Property tax is a permanent annual cost that compounds over a holding period, and on a substantial property the difference between two jurisdictions can exceed what most buyers spend on anything else in the running budget.
It also affects resale. A property carrying an unusually high assessment relative to comparable ones is harder to sell, because the next buyer runs the same calculation you should be running now.
Often not. Many jurisdictions reassess when a property changes hands, and where annual increases have been capped for a long-held property the current assessment can sit far below market value.
Ask the local assessor how reassessment works, then apply the assessment ratio and the combined rate — which usually includes county, municipal, school and special district levies rather than one figure.
Usually not. Homestead, senior, veteran, agricultural and conservation classifications are frequently tied to the owner rather than the property, and losing an agricultural classification can trigger a multi-year rollback.
Frequently yes. Significant improvements or added square footage can trigger a partial reassessment in many places, and the increase persists. Establish this before planning major work.
Yes, and appeals are underused. Grounds usually include assessment above market value, errors in recorded property characteristics, or inconsistency with comparables. Deadlines are strict and fall shortly after notices are issued.

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