The checker is currently free in beta. Features and pricing may change. Type your address and we compare your assessment with genuinely similar homes nearby, straight from the state's own records:
Maryland splits its two-million-plus properties into three groups and reassesses one group each year, so every home gets a fresh value once every three years (SDAT). Notices mail in late December; the December 2023 round, for example, went out on the 28th. The notice shows the old market value next to the new one (SDAT's appeal page).
An increase is not billed all at once: it is split equally over the next three years (SDAT Q&A). That phase-in is why the taxable amount steps up again in years two and three with no new notice. A decrease works the other way: it applies in full the first year (SDAT).
Two honest questions decide it. Would your home really sell for the assessed value? And is it assessed above genuinely similar homes in the same reassessment group? The first needs an appraisal or recent sales. The second is what this site checks using the state's own roll: same group, similar size, lot, and age, same zip. Most homes sit in the normal range, and when yours does we say so plainly.
Filing costs nothing, and you never need to hire an appeal company (they charge a cut of any savings for the same public numbers). The windows, per the official process page:
The first stop is an informal hearing with an assessor, usually about 15 minutes. If you disagree with the result, you can go on to your county's appeal board and then the Maryland Tax Court, still without fees.