Asunto Oy Savonlinnan Kellotorninkatu 18

Onni Isännöinti is a Finnish property management firm specializing in small housing companies (asunto-osakeyhtiöt) across Finland. They offer fixed monthly-fee services covering statutory obligations such as accounting, invoice payments, charge monitoring, and customer service, with additional à-la-carte services billed by actual workload. Their model differentiates from traditional property managers by operating fully digitally, enabling nationwide coverage without geographic constraints.