I don't have one, so cant speak from experience but you must heat it. My brother in law built his own from log lap, insulation and plasterboard etc - spent thousands on it as his main office to work from home. He ended up getting a radiator plumbed in to come on with the boiler. Electric heaters are expensive and obviously theres the danger that if one fails you won't be in there to notice it. He said without heat it still gets major issues just as a detached house would with no heating., Our fantastic range includes log cabins, climbing frames, garden offices, sheds, summer houses, gazebos, pergolas, conservatory alternatives, and solar shading. All that you can possibly need to bring your garden to life, while enhancing your family’s lifestyle, it is available at Dunster House., I have registered with this site specifically to warn of Dunster House. Be warned there is NO GUARANTEE on their cabins and any problems will be met with 'wood is a natural product - see our disclaimer'. We bought a double thickness Hudson cabin and paid £1500 for erection on top of the price of over £4000. Within 2 weeks of erection, the interior boards had separated by several .