Currently have access to finance for house stuff and weighing up competing priorities. I haven't enough money to do everything I'd like to so - advice welcome.
Live in a standard 3 bed semi that has been extended into the loft to make 4 beds.
Me and 4 young dc (one going into teenhood now).
We have a reasonable sized living room, smallish dining room, smallish study and smallish kitchen (u shaped galley - basically it's fine for 1 person but as soon as 2 are in there it becomes frustrating and difficult to use). The living room/dining room/study are all open plan and the kitchen is off this.
House is 60s weird construction so ground floor and whole gable end wall are insulated cavity brick, but front and back 1st floor are timber framed, no insulation, so just cladding, tar stuff, gap between timbers and then plasterboard. Not warm.
Loft is insulated but gets very cold in winter and hot in summer regardless.
Back of the house faces south and gets unbearably hot in the summer throughout.
The study is in an existing 70s flat roofed extension and not at all well insulated despite the cavity being filled (recently)
There is a flat roof at the front in which is a downstairs loo and part of the hallway - which is open to the rest of the house and no way to close it off practically (as in no way to potentially make it closed - an internal door would not fit in the layout). The front door, window by it and window in the downstairs loo are all single glazed and draughty, despite fraught proofing measures having been added.
The rest of the windows are old (probably early 90s or possibly older) upvc double glazed, and also draughty and not great but not unliveable.
If you've made it through all of that, what I'd like to do:
A) extend across the full width from the 70s extension, put a properly insulated roof over, move kitchen into new extension along with a closed off utility area and move study into old kitchen closed off with a door.
B) add dormers to the loft room to increase usable space and thermal performance both in summer and winter.
C) insulate between the timber frame of the first floor, then replace the upvc cladding with cork cladding to further increase thermal performance.
D) replace single glazed windows and front door with double glazed, and replace old double glazing with new, using solar glass on the south facing elevation
I cannot do all of these things. Should I prioritise the non-exciting thermal stuff which will make the house more pleasant temperature snd fraught wise, or the exciting extending stuff which will make the house more pleasant space wise?