My message might be too late for you but there might be others in San Francisco who are looking into remodeling a bathroom. I'm 90% finished in my 12' by 6' master bathroom. I found this contractor that has a good helper and they have both done all the work. One thing to keep in mind is that no contractor can give you a final estimate of the cost of the project. In my case, as the old walls were removed, there was a lot of dried rot (extra $3,000). I wanted all the plumbing new with 3/4" copper (extra) new electrical (extra). Overall, my project is about $58,000 but I am very, very satisfied. Labor and material has been about 55%. I chose high end features (20%) and marble (20%). I designed every detail and that saved me in getting a designer (around $4,000). Remember, the contractor is not a designer. There's a lot of work to pull a project like this together. Just selecting colors for walls, tiles and features takes a lot of time and arguing with your partner (we still talk to each other.)
My bathroom is considered a high end bathroom: double shower, rain shower and body jets, magazine built in rack, 4' x 3' mural (expensive but a beautiful addition), fans with built in speakers (wifi), lots of insulation (walls and floors), new drainage pipes, heated floor (Ditra system) with programmable thermostat, Robern medicine cabinets, Kohler features with lifetime warranty, Juno cabinets, Proline drain body system (rectangular drainage), new circuit breakers (110v and 220v for floor and tower warmer), many switches for different lighting moods, replaced all old pipes with 3/4" copper pipes all the way to the main valve (about 25') etc.
I my opinion, find a contractor that is CAPABLE of doing what you want him/her to do. I found many contractors like to do standard work. Once you start explaining what you want, they don't like or they just increase the price so much to discourage you. It is very important to find a good vendor for the features and tile. I had a bad experience with a tile consultant that agreed with a tile with stainless steel leaves that I like for the shower walls (around $18,000 extra.) When I check with the manufacturer, the tile was not recommended for humid places. Needless to say that tile vendor was out...
Summary: You get what you pay for. Start with drawing an exact floor plan before you talk to any contractor. It will cost you around $300 to $500 but it is essential. I did it myself using Excel. Get a good bathroom designer and bring him/her to your place to give you ideas (around $75 to $150.) I was my own designer. San Francisco is just a very expensive place to do remodeling!