The shed will be divided into two sections: the brewery (2.3m x 2.3m) and the pub (2.8m x 3.4m). The footprint is just under the 15m2 land the height is just under 2.5m, both just below the size for which planning permission would be required.
It should be usable year round so have opted for 4 inch insulated walls, skinned with 12mm external ply with another layer of feather-edge cladding over the top for asthetics. Roof joists are also 4 inch with a layer of 12mm external ply on top and a layer of premium grade roofing felt for weather-proofing.
A power supply will be run from the main house and provide both mains power and lighting. The brewery will also have plumbing installed, although there will not be a permanent water supply. Rather, I will put a hose attachment to the outside of the shed and run a hose pipe to it from an outside tap whenever I need to brew.
Because windows and doors can potentially be very expensive, especially if you want decent insulation, I picked up 5 large triple-glazed windows and a door on eBay for £40 and then designed the rest of the structure around those. All of the materials have already been delivered and I am doing the work myself. I started a coupleof months ago so have already completed the structural studwork and the roof and will post some pics of the progress so far soon. The total cost will be in the order of £3500.
This is the design which has been done using sketchup. The pub is on the right, the brewery on the left:
