Mad_Cyril also the fact that the quote is based mainly on the EPC, which isn’t great for accurate costings. I was chatting with an Octopus rep last week and said I’m keen but due my cert being old the quote won’t change from £7k + grant.
We’ve had the whole house renovated in 2020, rewire, replumb the lot so most of the infra can be reused. If the quote was £2kish + grant I’d get it done