Cheapest way to build an extension

[Danielle007]

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. 

[nod]

I’m looking for a Heat Pump If your husbands dad can get me one cheap 

[SteamyTea]

A new girlfriend for Christmas (just the week) if they have one going spare.

[Onoff]

17 hours ago, Danielle007 said:

What would be the cheapest way to do this?

 

Pallets! ?

[Danielle007]

16 hours ago, nod said:

I’m looking for a Heat Pump If your husbands dad can get me one cheap 

He gets literally everything from work. He got us an air con last year lol. I'll let you know if he comes across one.

[Danielle007]

7 minutes ago, Onoff said:

 

Pallets! ?

Funny you say that. We don't that at our current property and it looked amazing in the end ? I want it cladded properly this time though. Due to the size I don't think we have any way around obtaining planning permission though. Unless I somehow build my own caravan on wheels from scratch. Then again that will also probably end up needing some sort of certificate to say it's safe for roads etc. 

[nod]

22 minutes ago, Danielle007 said:

He gets literally everything from work. He got us an air con last year lol. I'll let you know if he comes across one.

 

[the_r_sole]

You want to do it properly but you're looking at caravans?! 

In all seriousness park the idea until you've got a realistic budget and cost expectation... or until your Father in Law has accumulated enough materials to do it properly ?

wanting to do it properly but avoid planning and warrant because they're expensive is a complete misunderstanding of why we have those controls and what doing it properly means!

Edited December 22, 2021 by the_r_sole

[DevilDamo]

Assuming you’re in England/Wales, then irrespective of how it’s constructed, it would require both Planning and Building Regulations.

[scottishjohn]

5 minutes ago, DevilDamo said:

Assuming you’re in England/Wales, then irrespective of how it’s constructed, it would require both Planning and Building Regulations.

in scotland you might only need BC -next door has just built on which  is 50% extra on size of house  and was only BC

thought it was same in england depending on size and what other extensions have been done already  and other outbuildings  and size of garden and how close to next door 

 they even let him use different tiles on extension - concrete tiles on main house and  marley slates on extension 

 

Edited December 24, 2021 by scottishjohn