I agree that there isn't really a right or wrong answer, as there are benefits to the extra storage, but also to some there are benefits to the extra sink. And so much of the final decision has to do with things really specific to you and your husband (love the response just above this one! It's the little things in life like not looking at crusty toothpaste that can really make us smile!). I'm one of the one sink people out there, with a strong preference for it. I always like to get ready alone in the bathroom anyway, and two sinks just make for more cleanup in my view. Even if there is the room, there would always be something I'd rather do with the space (either just extra spaciousness, or more storage, or whatever). But of course I understand why people who share the bathroom simultaneously on a regular basis would prefer 2 sinks. Good luck with your decision!

We have that also...30" cabs on each end. I don't know what kind of mirrors you're doing over each sink. But if they're coming in from the wall a little...say two inches on each side, that's bringing your mirror width to 26". You may also want the lights to come in a little also. Personally, I'm doing double sconces over our sinks. I like the look this gives better and there's plenty of light with the other lighting in our bathroom. Some images for you to peruse:

I don't think large size is particularly important in a bathroom sink -- a kitchen is completely different, but how big a sink do you really need to wash your hands and brush your teeth? I'd say pick a shape and look you like -- and go with it. However, don't choose a shallow sink. I didn't realize this was a big issue until I moved into my current house -- we have lovely shell-shaped sinks, but they're shallow and if the water's turned on with any force at all, they "splash back" at us. And do pay attention to how the faucet will extend over the sink. When we moved into this house, my girls' bathroom had big chunky faucets that extended "too far" over the sink -- they actually seemed to take up space in the sink. I replaced them with something smaller and taller, and they're nicer now. When we build, I intend to go with wall-mounted faucets to make cleaning easier and to take up NO space on the vanity. Like the above poster, I also don't care for 24" deep vanities in the bathroom -- and for the same reason; it feels like I'm too far from the mirror. I'm also going with 18" deep vanities in my new house; deep storage under the bathroom sink just leads to clutter anyway. If you still have the option to reconsider this, I would.

Hello everyone I am so sorry for the late response. My little one got sick .. Thanks for all of your suggestions and comments! I truly appreciate them! I understand that what I would like to have is not going to fit in the current vanity layout we have right now. There is no time for us to change the layout now. They have started installing granite and we want them to meet the deadline to finish the house or we will be left without a place to stay! So we have decided to go with the single mirror for now. There is no point now in worrying over not having extra storage that we may or may not need in the vanity in the future. If after living in the house for couple of months we feel like we need extra vanity storage, I will add extra storage under the makeup area or in the master closet. But I will for sure replace this vanity sometime in the future with a more useful one :) Sophie Wheeler we live in Northern Louisiana. I looked up the guidelines you are talking about. I wish we knew about these before. But are they firm rules or just guidelines? The builder already sold a house with a similar layout last year so I am assuming he had the same vanity there and it passed inspection. I do not know for sure but why would anyone build something knowing it will fail inspection? :/