Unfortunately it is a bit of a chicken and egg situation because you can't really get an estimate unless you provide the GC with the specifications because otherwise the estimates are meaningless and can't even be used to compare one against the other since god is in the details.

What is your budget - you must have some amount that you have in your mind that is what you can afford to spend at the moment. Pulling a figure out of my proverbial arse, I would say that a moderate - not upscale bathroom - in a moderate but not high cost of living area would cost at least $15,000 if not more.

Prefab showers or prefab/tub showers are quite a bit less expensive than the kind of tiled shower that most people covet because the materials for a tiled shower are more expensive and you need more highly skilled labor or you can wind up with a disaster. I suspect that my tiled moderately size shower cost at least $10,000 and perhaps more when everything was factored in - tiles, labor, framing, waterproofing, plumbing - including all of the fixtures and grab bars and the frameless shower door. It all starts adding up - and that is just the shower :-).

Need more specifics. Are the rough in’s already there? Are you planning to get the most basic fixtures possible - and which pieces are you planning to include? Prefab? Tile? You really gave us nothing to work with. Find some pictures or retail links of what you have in mind.

We spent about $14k I believe all in, but plumbing was already there. They did have to break up the concrete basement floor and re route things, and put up walls. We didn’t go for upscale fixtures. We had another quote at 30k, I think we got lucky with our contractor!

Becca - depending on where you live, you definitely got lucky. A bathroom like that where I am would easily be over 20K all in.

Looks great! And it's nice that you have a window...

@Becca N - Lovely bathroom and the results were well worth the expense.

But Becca N did economize which makes sense for a basement - prefab shower floor; only tile is the shower which uses the relatively inexpensive white subway tile in standard size and no tile any place else; shower curtain instead of shower door; no tub; small vanity; toilet is skirt and probably relatively inexpensive model. Other choices could easily add $10,000 or more and that is not even factoring in labor costs - e.g. San Francisco versus a small Southern town or equivalent.

This is not critiquing the quality or design choices but underscoring how impossible it is to give even a "ball park" estimate of what a bathroom might cost. How much does a car cost - a Ford Fiesta? a Honda Accord? a Mercedes or even a Bentley?

Ours was about 12k, but that was 7 years ago and it is NOT fancy! We used swimming pool tile for the floor that was about $4/sq foot, inexpensive subway tile for the shower, and found the sink and medicine cabinet on Craigslist. Our contractor also works basically on his own, with a couple of subs, and he was much less expensive than other bids.

2021 national average to remodel an existing 3 piece bath is 21K. If you have to jackhammer the slab to add the rough plumbing, double that. Then add in the 15% price increase of 2022.

https://www.remodeling.hw.net/cost-vs-value/2021/

There is another way to evaluate. A way to roughly determine the cost of any work in this area. The formula is two guys, professionals, a day = $1000. This is from your pocket, just for work. Materials now jump in price.