Can condo home owner association prevent someone from buying a condo?

Whether it's a condominium unit or a home that is embedded among assets owned in common with other owners, unless the governing documents of the association specifically dictate a screening process that every potential buyer experiences, a potential buyer cannot be singled out and prevented from such a purchase.

If, however, the association is a cooperative, which is a different style of real estate ownership, screening potential buyers is expected. If a potential buyer cannot survive the screening, then the purchase can be denied.

Best practices dictate that you obtain a copy of the governing documents to determine whether screening is part of the purchase process for all potential buyers.