Can I appeal a condo, townhome, or co-op?

Yes, you can appeal a condominium, townhome, or co-op — but the unit of ownership changes who files and on what.

Condominiums and townhomes are appealed like any other home. Each unit is a separately assessed parcel with its own account number and notice of value, so you appeal your own unit's value using the standard procedure for your jurisdiction. Your strongest evidence is recent sales of comparable units in the same or similar buildings — same bedroom/bath count, similar square footage, similar floor and view for high-rises. Townhomes are typically fee-simple (you own the land under the unit), so they appeal exactly like detached homes. For the underlying right to a hearing on your own parcel, see your state's tax authority — e.g., the Texas Comptroller's protest procedures confirm an owner may protest the appraised value of their property.

Co-ops are different. In a housing cooperative you own shares in a corporation, not a deeded parcel, and the building is usually assessed as a single property taxed to the corporation. That means the appeal is normally filed by the co-op board or its managing agent for the whole building, and your benefit flows through your share allocation rather than a separate bill. New York City is the leading example: the NYC Department of Finance values co-ops and condos as income-producing buildings and the NYC Tax Commission handles aggregate co-op/condo applications filed by the building, not by individual shareholders.

Practical steps: confirm how your unit is assessed by pulling your property record from your assessor or appraisal district. If you have your own parcel and notice (condo/townhome), file individually before your deadline. If you're a co-op shareholder, ask your board or managing agent whether they are filing the building's appeal — and supply them comps if you think the building is over-assessed. The math, comps, and hearing process otherwise mirror a single-family appeal.