Dutch housing associations have a market share of about 33 per cent of the entire Dutch housing stock. They spent around 2.8 billion Euros a year on the maintenance of dwellings, of which external suppliers account for approximately 89 per cent. External service suppliers can as such be seen as an extension of the housing associations in fulfilling their public tasks and private objectives. Maintenance service delivery gives an opportunity for high quality interaction with tenants.At the moment maintenance service delivery appears to be of a suboptimal quality leading to a lower than potential tenant satisfaction. With this an essential part of the objectives of housing associations is not fulfilled optimally. This research reveals the essential determinants of maintenance service quality in order to promote tenant satisfaction. Commodity strategies for the purchasing of maintenance services are developed which make its optimization possible from the perspective of tenant satisfaction.