Approx cost - Cutting exterior wall for New Patio door and new french window

ejunky

What should be an approx cost for this job ? If you have hired tradesmen to get a similar job done within the last couple of years, how much did it cost you in total ? Am adding 2 mockup images which more or less explains what am looking for.

Current state: 

We currently have only One patio door in the living room opening to the garden.

Required state : 

1) We need 2 patio doors adjacent to each other. The existing one needs to be reused. The wall, ofcourse is an external wall. Let's call this wall Wall01.

2) On another external wall ( which is perpendicular to Wall01 ), we need one window ( ground to ceiling high ). Currently, there is no window or door on this wall. This too, is an external wall.

The job I guess involves cutting an opening in the walls, installing lintels, and then installing the doors/windows. Any tips about the cost to expect will be very helpful. Am not even sure if I should expect something in the range £1000 to £3000 ( which is my budget ) or is it going to be £10K+  ??

Many thanks for any replies

Interior Original & Mockup :

Exterior original & Mockup :

FreeBear

That is a pretty major structural job. Your first port of call would be to consult a structural engineer to see if it is even possible within your budget. Building control would then need to be notified before starting work (and check with the planning dept, although it shouldn't need PP). I doubt very much that you would get the job done for as little as £3K - If you did, just make sure to get several bags of oats & hay in for the builder's horses.

ejunky

FreeBear said:

That is a pretty major structural job. Your first port of call would be to consult a structural engineer to see if it is even possible within your budget. Building control would then need to be notified before starting work (and check with the planning dept, although it shouldn't need PP). I doubt very much that you would get the job done for as little as £3K 

Thank you for the info, freebear. 

just make sure to get several bags of oats & hay in for the builder's horses.

haha ... ok point noted.
What would be your rough estimate ? 
Thanks

Doozergirl

That's likely to involve a lot of steel
and digging to strengthen the foundations to hold a more concentrated load, so you would be looking at the upper end of your guessing!   Plus the "small" issue of diverting the downpipe?! 

I'm finding more and more people coming up with these lovely ideas of using acres of glass in existing walls but unless the building is designed and built with it in, it costs a fortune when you're going close to corners.  

I don't blame you for wanting more
light.  The developers were more than a bit stingy on the window size!  

You could go a bigger with the one set of doors for a great deal less than trying to open up a corner. But the doors aren't cheap themselves.  Add in the structural engineer and building control, you're probably looking at £5k just to gain a metre of glazing, perhaps.  

tonyh66

Doozergirl said:

That's likely to involve a lot of steel
and digging to strengthen the foundations to hold a more concentrated load, so you would be looking at the upper end of your guessing!   Plus the "small" issue of diverting the downpipe?! 

I'm finding more and more people coming up with these lovely ideas of using acres of glass in existing walls but unless the building is designed and built with it in, it costs a fortune when you're going close to corners.  

I don't blame you for wanting more
light.  The developers were more than a bit stingy on the window size!  

You could go a bigger with the one set of doors for a great deal less than trying to open up a corner. But the doors aren't cheap themselves.  Add in the structural engineer and building control, you're probably looking at £5k just to gain a metre of glazing, perhaps.  

sounds about right, supply of a set of bog standard patio doors will be around £1k. Taking out the entire back wall is looking at the sharp end of your £10k, and I wouldn't be using 2 sets of patio doors like that there would have to be a spacer to accomodate the 2 doors when they are open creating a nice pillar down the centre of your new opening. If your chopping a hole that big, then bifolds would be the way to go.

ejunky

Many thanks for your inputs doozergirl and tonyh66 ! Good info, makes sense...
Never done anything like this before So please excuse my ignorance !
Last few days I happened to learn about the 665mm / 3 brick rule ... also been in touch with a structural engineer ... and I now do understand that opening up the whole wall is not feasible in my budget , but i guess sticking to the 3 brick rule is the best way ahead when money's tight !

Doozergirl

You've got it 🙂