In a multi-storey residential housing project comprising of four 8-storey timber buildings, the bottom storey being designed with concrete and storeys 2-8 in timber, the vertical relative displacement, the temperature and the relative humidity (RH) have been monitored. Displacement measurements started during construction and presented herein are results of 6.5 years of in-situ measurements. Temperature and relative humidity measurements have been ongoing for about 5.5 years. The temperature and RH measurements were performed at six different locations in the building, at each location in eight positions through the exterior wall with a sampling frequency of 1 measurement every 15 minutes. The results show that the total vertical displacement over six storeys after 6.5 years of service life is approximately 23 mm as a yearly average, and over the year the displacement varies from this value by approximately ±2 mm. The main cause for the relative displacement is the decrease of moisture content in the wood material leading to shrinkage after completion of the building. The results obtained show also that the exterior wall design of the building behaves well in terms of not comprising a general risk for damp or mould in the timber core of the external walls.