You put it right in your question regarding founding of a cooperative association – there are more costs required since it is a capital company with a minimum capital of 285 euros. Society is not a capital company, so its founding process is much cheaper – you have to pay just for registration in the Register of Societies and Organizations and publication in the newspaper Latvijas Vēstnesis.The fact that the society is a non-profit organization, while cooperative association is not, does not really matter. Cooperative association does not pay company income tax on the annual balance. If a cooperative association pays its members this balance as a part of profit for shares, cooperative association is not charged the company income tax while members having received this profit should pay personal income tax on it. The only truly essential difference between these two forms of associations isopportunity to be engaged in economic activities and make a profit. If one of the goals of activity of your envisaged association is making a profit, for example, maintenance of the property of others for a fee, renting out and leasing out of property, or other activities, then it is necessary to found a cooperative association as it is forbidden for societies to engage in this kind of business. If there are no goals and founded company will be engaged in maintenance of joint estate in your house only then it is possible to establish a society.