Hello,
I've just built an extension on the side of my sons house completely DIY, neither of us have any building experience.
We started with getting a building notice with the local council and finished with building control sign off last week.
We followed building regulations and interpreted all the new ones and we made a youtube video of every step including detailed explanations of how we did it and how to comply with the latest building regulations.
I hope this will be of some help to anyone else in my position (starting as a complete beginner) or maybe we could get feedback from any experts, because we are now planning a large rear extension on my house.
Here is a link to the first video; foundations and drains, and from there you can find; up to DPC, walls, roof, doors/windows, radiators etc etc.
I hope it helps, Terry.
If you want anymore info about how we (DIY ers) did it, just ask, it is great when we can help!