So we're moving home soon. We previously built an extension onto the back of our current property (didn't get planning permission. Council didn't mind because we said we were taking it down when we move, although they wanted us to keep it up and was just going to get someone to inspect it) It cost us around £250 in total but that's because ny husbands dad got most of the materials from his work for free.
My husband, father in law and my dad are all ex royal engineers and have a lot of trade, eg carpenter, my FIL is an electrician and so on. We want to build an extension on our new property, we want to do it the proper way this time as I'm not sure if neighbours will complain. We are a semi detached and have the very forst end building and the land is seriously huge. We want to build an extension that measures 34x31 feet. What would be the cheapest way to do this? We considered twin caravan but they're extremely expensive. We thought of iso containers, got a few quotes and again really expensive. My husband's dad can get loads of timber and also steel bars and rods etc. I think building it ourselves would be the cheapest option but I don't mind paying a bit more for an easier alternative that doesn't involve all the hassle obtaining planning permission/building regulations warrant.