There are a series of variables that significantly affect the labour price for your bathroom. If you want to keep costs down, be careful with these:
Changing the layout can be very costly, but it really depends on what you want to move. By far the hardest to move is the toilet (since it has a very big waste pipe). Another one that is usually hard to modify is the drainage for the shower. Especially if you have a bathtub and you need the waste lowered, this can add a lot of labour time to the quote.
The time to change the layout is going to be dependent on how your house is built. If you have stud walls + suspended flooring, it’s going to be much easier to move things around. If you have solid brick walls or/and solid concrete floor, this is going to be by far the hardest thing to do.
Changing the flooring can be quite costly. If you want vinyl click flooring or tiles, the subfloor has to be very sturdy and level. In most cases this means replacing the subfloor with a sturdier subfloor + using some sort of leveler.
If you have concrete subfloor, this is going to be cheaper for you than for those with a suspended subfloor.
Having downlights is not very expensive, but fitting downlights mean that the ceiling would have to be replastered/repainted. Although it’s a relatively small area, the ceiling in a bathrooms take a lot of time to paint/replaster.
For this reason having a UPVC ceiling is going to be the same cost as plaster + painter. Although the materials are more expensive, the UPVC ceiling is faster to fit.
Tiling on the wall can take a lot of time and increases the labour cost significantly. The labour for fitting panels is the most affordable. Plaster + paint is somewhere in the middle when it comes to labour.
New extractor fan
Having a new extractor fan can be costly if you don’t have one at the moment. The worst case scenario is if you have a granite wall, it takes a very long time to drill, even when we use specialised tools.