Really not sure whether to go ahead with an extension on our home or not?
House is worth approx £520000 and we have £290000 remaining on the mortgage to be paid over the next 20 years (currently paying £1300/month).
To fund the extension we would have to borrow an extra £65k on the mortgage. We have 4K of saving but I am keen to keep hold of that for car bills etc.
Is borrowing that much extra a good idea? I was made redundant due to Covid but husband has a steady job and income.