Guilderland, New York · Albany County · public appraisal records
3,622 homes in ZIP 12303 may be over-assessed
We analyzed 8,664 single-family homes in 12303 (Guilderland, New York) against comparable homes nearby. About 41.8% are assessed more than 15% above the typical home on their own block — an estimated $3.9M a year in property-tax overpayment. Is yours one of them?
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Where over-assessment clusters in 12303
Streets in Guilderland with the most homes assessed above comparable homes nearby. We show the street and a count only — never a specific address or owner. Enter your address below to see if yours is one of them.
Enter your address to see if yours is one of them
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If 41.8% of homes in 12303 are over-assessed, your neighbors probably are too — and most never check. Send them this page.
How we measured this
We compared every single-family home in 12303 to the median comparable home in the same ZIP, using public assessment rolls, and counted a home as over-assessed when it sits more than 15% above that median. This is a ZIP-level screen — it shows where over-assessment is common, not whether any specific home is over-assessed. See the full nationwide methodology and ranking. Data as of June 2026.
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Frequently asked
How many homes in ZIP 12303 are over-assessed?
In Guilderland, New York (ZIP 12303), about 41.8% of single-family homes — roughly 3,622 of the 8,664 we analyzed — are assessed more than 15% above the typical comparable home in the same ZIP. That points to an estimated $3.9M a year in property-tax overpayment across the ZIP.
Does living in 12303 mean my home is over-assessed?
Not necessarily. This is a ZIP-level screen built from public appraisal records — it shows where over-assessment is common, not whether your specific home is over-assessed. The only way to know is a per-home comparison against similar properties, which our free address check does in about 30 seconds.
What can I do if my Guilderland home is over-assessed?
You can file a property-tax appeal (or "protest") with your county, usually once a year within a filing window. If comparable homes are assessed for less than yours, that's the standard "unequal appraisal" grounds for a reduction. AppealMyTax builds the pre-filled protest kit and appeal letter for $49 flat — sign and submit, and you keep 100% of any savings.