The master's thesis is based on a Finnish open competition called: Tampere Academy of Music Building Extension which is held in the winter 2013/2014. The purpose of the competition is to find a design for an extension to the music conservatory located in Pyynikin Square in Tampere and to compensate constant shortage of premises. The extension will solve the problem by adding various new teaching spaces, a new concert hall and the "black-box"theater. The building expansion will be designed to find a Pyynikin environment-friendly, architecturally high-qualified solution, in which the aesthetic, practicality, technical-economic and sustainable development objectives could be solved in a balanced way. The new premises together with the existing conservatory will not only function as a high-level educational building, but also a living room for Pyynikki people, and a joint between Pyynikki nature and urban living. The thesis consists of two parts, research part and design part. Research part includes background analysis, case study,context of Pyykkini. Design part focus on the The expansion of premises, which will be divided into four major parts: music teaching, dance teaching, childhood education and public spaces(concert hall and theater room). The design part of the thesis will be developed further and made more precise than a competition proposal. The thesis will contain A1 sheets, a text with appendix pages and a scale model.