Re: What to Require in Bath Room Renovation ?
1 - Install blocking as per ADA spec in shower and at toilet. IMHO, this should be a code requirement, yet it is not. The reason is simple, there will come a day when you may need to install grab bars, either for convenience or necessity and you're not going to want to tear open those walls to do it. It costs pennies to do it during the remodel and can cost thousands of dollars later in repair/replacement costs.
2 - Absolutely NO silicone caulk! It fails as fast as latex, regardless of what the label or anyone else says, and you can't clean it out and replace it because nothing, including more silicone, will stick to it. Latex caulks can be maintained or removed and replaced with relative ease.
3 - The suggestion of threaded 1/4 turn anglestops is excellent for the exact reasons stated. The biggest plus is that they do not get hard seals in them, so you can turn them on/off as much as you like without failure or leakage.
4 - Make sure your electrical requirements are being met, that may mean a dedicated circuit for each, just depends on how crazy you get with appliances in there. Also, if you factor that many people have electric toothbrushes, you may want more than one outlet installed for the items that need to stay plugged in and yet still have room for other items. As an example, in my shared bathroom there are three electric tooth brushes, a water pic, and a table top fan. In addition the girlfriend also plugs in a curling iron and/or a flat iron. As you can see, a single outlet just wouldn't cut it. The more people that use the bathroom, the more need there is for available outlets.
5 - Instant hot water heater. Depending on the distance you are from the hot water source, a point of use heater may be in order, at least for the sink faucet. This will increase the electrical requirement in the bathroom.
6 - Exhaust fan - regardless of having a window in the bathroom, you should have an adequate exhaust fan to vent shower moisture and toilet odors.
7 - If at all possible, choose either cast iron or enameled steel for bathtub. They are the easiest to maintain and last the longest. A fiberglass shower pan will last ok with proper care. I would also recommend either tile or solid surface surround with glass doors. If you have hard water you'll want frosted doors for ease of maintenance.
8 - When choosing plumbing fixtures, lighting fixtures, tile, flooring, paint colors, etc, choose something that is a classic design and color. The worst thing you can do is use products and designs that will be out dated before the contractor leaves the house. You will never go wrong with the classics.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!