Hey, I love my shed is used for recording music. It's soundproofed and has a separate internal room for recording instruments. It has air conditioning, network and power.
The shed has a wall is made from a single skin of dense block work, this is covered by shiplap to make it look like a shed. The inner walls are made from MDF and packed with Rockwool. The roof is flat and covered with felt and has a 6" cavity packed with Rockwool, low heat LED bulbs are mounted in the ceiling. It has a thick firedoor and a wooden front door with a 4" air gap. The building is used for recording music and is soundproofed.