We have just started renovating a large 4 bedroom cottage so I can give you an idea of our costs.
Our budget is £60k and that includes;
Windows £17,000 (18 UVPC windows and 3 composite doors)
New kitchen/utility £20,000 (including fitting and appliances - separate fridge, freezer, induction hob and double oven/microwave combi, big island and quartz worktops)
3 new bathrooms £4,000 (this was just the price for the fixtures and tiles at trade price - husband will fit)
Electrics £3,000 (we didn’t need to rewire but do need a new consumer unit)
Builder is £220 a day, he thinks he will need 2 weeks to move a couple of walls and plaster ceilings upstairs
Flooring £7,500 (sounds a lot but that includes 60sqm of Karndean which isn’t the cheapest!)
Hot water tank £500 (hubby will fit and he already had the copper pipes and fittings etc)
My advice would be to make some friends in the building trade 😂 my husband is an ex-tradie and we are calling in favours left right and centre from his mates.
Also do your research and shop around for quotes - we were quoted a lot more for a Wren kitchen as apposed to a better quality alternative from an independent kitchen designer.
Someone above mentioned the mortgage - most lenders are happy so long as there’s a functioning kitchen and bathroom. This is all that’s required to deem a house ‘habitable’.
I would recommend getting a RICS survey done to check for structural issues, damp etc.