I'm hoping to move into a new house in the new year. One of the first things i need to tackle is the creation of a home office down the end of the garden. The property we are trying to buy has a big garden, part of which down the end has been earmarked for the new office space. I could run power down to the site but this would require digging a trench about 40 to 50m long. I'm looking at an insulated, composite building that comes relatively prefabbed. I will need to create a concrete / brick base. I'm looking to figure (and cost) out: Heating - Electric Underfloor heating, suggestions on brands, controls (as it will be used with solar / battery). This can be built into the concrete base. Cooling - AC for the few hot weeks a year and supplementary heating if needed. Potentially de-humidification may be nice too. Something to be run off batteries so suggestions if you have any? Power (generation) - Solar panels on the roof to generate enough electricity. Suggestion on size, brands ect. Power (storage / conversion) - Battery bank and distribution / conversion requirements. All that jazz. Other Stuff - Need to extend my home network to the office, I'm thinking some form of antenna / receiver to connect the office. I will be running a TV and office computer so they will need powering too. I'm a competent DIY'er, builder of watercooled PC's so I think I can tackle all that's needed in terms of the fit out but I need some advice and experience so I have everything planned out for before I start. Thoughts, feedback, ideas?