Bathroom remodel

Mahsroh

Not a complete bathroom but had a new shower and enclosure put in a rental property a couple of years ago. Spent £1.1k in total. 

Shower (electric), tray, waste, enclosure = £350 (Plumbing World - personally, I thought the quality of materials was excellent) 
Local Plumber for fitting incl small materials (pipework alterations, fixings etc.) Two visits = £450
Tiling (materials + tiler) = £300

Removed old tiles and enclosure myself.
Plumber first visit to remove tray and shower and fit new tray / waste.
Tiler to do do tiling
Plumber second visit to install new shower and enclosure.

I suspect if i'd gone to someone like Victoria Plumb and got a "turnkey" price it would probably have been closer to £2k. I probably could have done the tiling myself too if I'd wanted to but as it was a rental property I decided it was better to pay the professionals. 

Likewise I also got a brand new kitchen (including integrated cooker / extractor and new electrical connections to them) for just over £4k following the same sort of process as above. On that occasion I did get a turnkey price and from memory it was around £7k! 

As others have said, it's an en suite so it's not like you'll be without a bathroom. So you may find you save money by following a similar process and if it takes slightly longer then it's not like it's going to be an issue. 

Appreciate it's not for everyone though and some just don't want the hassle of project managing the individual trades. Which is understandable. It does carry more risk, but likewise more rewards. 

princeofpounds

There's a DIY board further down the forum which can give you much more direct experience of costs.

My experience is that a) costs vary hugely depending on which area of the country you live and b) on this board you tend to get lowball-estimates from people who either did some of the work themselves, did it in an MSE fashion, or got a good deal (nothing wrong with any of that). People who paid 10-15k for a bathroom in London tend not to boast about it.