Extending House, Please Explain....

[teslacoils]

recently done a barn conversion to a good standard about £1000 per m2

Thats interesting. I have a barn to do aswell. But it seems more economical to spend next winter taking it down; cleaning the bricks; reclaiming the slate; turning the beams and trusses into nice planks of wood or pillars, then selling the lot and starting afresh.

 

[Forever Fendt]

Thats interesting. I have a barn to do aswell. But it seems more economical to spend next winter taking it down; cleaning the bricks; reclaiming the slate; turning the beams and trusses into nice planks of wood or pillars, then selling the lot and starting afresh.

Ours was a steel frame building built in 2007 , single story so I guess it’s about as cheap as it gets so perhaps not the best comparison

 

[Hfd Cattle]

Not read the whole thread but we recently put up an extension 4 m x 8m at side of our house for the FIL to live in .
No planning permission needed just building regs. We just got on with it .

 

[jackrussell101]

Builders are now charging a premium for extensions. One we know well ballparks £1800-£2000 per sqm for new builds but £2200-£2500 for extensions because he knows that there will be a lot of micromanaging or changing of minds from the client and/or unseen complexities when tying in the extension to the main house

Does that £2000 per m² include m² of upstairs as well?

So for example if ground floor is 100m² and upstairs is 100m², then total build cost is 200m² x £2000 = £400k?

 

[George from SJM Planning]

Does that £2000 per m² include m² of upstairs as well?

So for example if ground floor is 100m² and upstairs is 100m², then total build cost is 200m² x £2000 = £400k?

That was based on a single storey extension. I would imagine it wouldn't be double for two storeys though.

This is the extension I am basing it on - 27m2 and three quotes all in excess of 50k. That is full build and supply, no input from the client.

 

[Bill the Bass]

I would start with the builder and work out the art of the possible within your budget. Architects are fantastic at spending everyone else’s money and then billing you for the pleasure. However you need to start with a builder you trust - which are not easy to find. We have been lucky and had the same guy work with us for over 30 years, maybe not the fastest but I can sleep at night knowing it’s done right.

However I find it easier to trust people who hold tools as opposed to sit behind screens.

 

[teslacoils]

No decent builders nearby. I'm going to enroll on bricklaying course.

 

[Farmer_Joe]

Does that £2000 per m² include m² of upstairs as well?

So for example if ground floor is 100m² and upstairs is 100m², then total build cost is 200m² x £2000 = £400k?

no, single is more expensive, remember the foundations are extremely similar if not the same and you only need one roof!, so if you go double your only paying for floor joist and more blocks/bricks etc.

The last double i did was significantly less per m2 than my most recent even considering the extra expense of my kitchen in this one.

No decent builders nearby. I'm going to enroll on bricklaying course.

do it, labour is the killer, digging the footing etc is fairly straight forward UNLESS YOU FIND LOTS OF ANOYING SERVICES ops caps, luckily i only had my water supply and rainwater drain to move this time. Made it so i can get jcb in my garden a few years ago so filling the footings was easy and set up some lines lay you damp and off you go!

 

[teslacoils]

No services to move. It's being sited so even adding an en suite is simply a spur from the water and a pipe for the poops.

I'd say the roof was beyond me, and likewise plumbing.