One room studio

Hello! I work as a sound engineer in a theatre in Finland. I have a small homestudio in which I do most of the theatre studio work plus a lot of other recordings. As my family grew bigger, I started to look for a place I could rent and build into a studio and I found one quite near our house. Its a rectangular room, 36m2. I'm going to start fixing it up in the summer and I would like to hear some advice from you experts out there. My goal for this room is to make it as quiet as possible and as good sounding as possible (of course within a rather small budget). I would like to be able to record both loud drums and really quiet whispers in the same room. Luckily the room is located in a very calm and quiet neighborhood. It is in one end of a one story building so there is just one next door neighbor (who seem to be nice and understanding :D ). My budget for construction is around 1000€ (about 1300$). This is a drawing of the room. Here is a plan that I made of a room in the room: I am going to remove the drywall from the existing walls and leave the insulation open. On the new walls I'll only put gypsum board inside the studio so that it'll become a 2-leaf wall. The floor stays as it is (concrete), I'll just put in new laminate flooring. The ceiling also stays as it is. My questions are: -Is this a good idea? :D -Is it enough with 5 cm free space between the existing and the new walls? -I have no idea about acoustical treatment so any suggestions on what to put on the walls are very welcome! My plan is to place the speakers in the upper part of the room facing the door. The rest of the room will be filled with various instruments and stuff... Thank you for reading.. S

Does this building space have a height? Could you tell us more about what it is built out of...everything, walls, ceiling, floor,,,windows, doors, etc...plumbing... The height to the beam...need that too.

Hello xSpace and thank you for your reply! I post a new drawing that more accurately show information on height and building materials: This building has previously hosted a big commercial space and has later been rebuilt to several appartments. The room I'm gonna rent has been used as a storage place since the rebuild. The long wall adjacent to the lawn is made of tiles, then comes 10 cm rockwool and then drywall. The two other outer walls have a wooden facade instead of bricks and the inner wall is 10 cm rockwool covered by drywall on both sides (one of which I'm gonna remove before building a second wall next to the existing one). The front door is a typical insulated front door for our weather conditions. The window has two layers of glass. There are no plumbing except for two heating coils. Can I move them into the new room or will they transmit sound trough the hole building? I also started thinking about air flow... There should probably be some sort of ventilation. Any thoughts on that? Is it enough with two valves placed on each end of the room? Any ideas on how to build mufflers in that case? Best regards S

...the floor is concrete and the ceiling some sort of sheet covered with rockwool... S

the radiators could be moved and could transmit but it looks like you need the heating... :)

Yes, you are right. Actually a new ice age has already begun here as you can see. The snow will be very good isolation once it covers the walls :wink: