The current shortage of senior housing and the lack of accessibility in today's million-program housing creates concern among the older age group when the need to move becomes necessary with aging. Nowadays, more and more older groups are experiencing a fear of no longer being able to stay in their current homes due to lack of accessibility, which can make everyday life more difficult. Between the period 1965-1974 a million homes were built, which today are facing extensive refurbishment. By increasing the availability of these homes, the demand for senior housing can be accommodated while contributing to a more accessible society. In order to increase accessibility and contribute to an optimal living environment for seniors, technical building measures are required to be taken, as well as improvement regarding the floor plan. A pleasant indoor climate, access to a lift, spacious bathrooms and meeting places are some of the accomodationg that seniors value in their residential building. This report thus examines the required construction technical solutions to increase accessibility and improve the living environment in an existing residential building built under the million program in Finspång municipality. It also examines whether these solutions are technically and financially feasible to carry out, as well as researching what seniors generally appreciate in their living environments.