Try all the switches to make sure they all work. Take some blue or green painters tape with you and mark every mis-paint or ding in every wall and all the woodwork so they know what needs to be fixed. Open and close all the doors and windows to make sure they are hung correctly. Take a hair dryer with you and plug it into every plug to make sure they all work. Turn on the AC and Heat to make sure the thermostat works. Mark everything wrong with that painter's tape.

I forgot, check all the hot and cold water in every shower and sink to make sure they didn't plumb it wrong. Also, make sure the outside water works. Flush every toilet. Sigh. I did this on my last home which was brand new construction. Missed a few things, but most of it got fixed by the builder. By the time I noticed there was light at the top of the kitchen door, he was out of business. CHECK EVERYTHING!

Great thanks For Good Points, My Neighbor house is also under Construction, and she noticed that they Chose 1 1/2" Plank hardwood, but they install 3 1/2" Plank hardwood so what will happen On Final inspection.

Another little thing. Appliances. Anything they install, better be working! Check it all. Prepare to spend some time. Don't let them rush you. Also make sure the kitchen and bathroom cabinet doors and drawers work. Make sure knobs are secure and not loose as in stripped screws. If I ever purchase a new home again, I'd make a list for every room and check off everything so you forget nothing.

Make sure flooring is securely attached.

Ditto the recommendation to have a home inspector go through the house. Even brand-new, it's not perfect.

Thanks Suzi, How can I Check My Steam Shower? Should i Turn it ON? Last time when i Went my New House i see some scratches On Medicine Cabinet in my Master En-suite, should they change that cabinet?

Open and close all the windows to make sure they are NOT painted shut.

The Elephant in the room. Change the walk thru from six days before the closing to the day of closing.

The above suggestions completely miss the mark!!!!

Saltidawg, I agree. If a pipe were to break, or a valve fail, or vandals came in and tagged the place, or sellers came back and removed appliances/lights/etc, you would not know when you closed, and you own the house after you sign. Do the final walk through on the way to closing. If you had items that seller agreed to repair, you should be getting those checked as soon as they are done, to allow time to get them corrected, if they were not done. But the walk thru should be as close to closing as possible...within a couple of hours, but the same day for sure.

Take a cellphone picture of each flaw you mark with that tape!

There's a difference between an inspection and a final walk through. I'd do both.

New houses often come with builder warranties good for x amount of time past closing, at least mine did, but if the builder goes out of business, try squeezing blood out of a turnip! I agree you should take photos of the tape, because they can remove the tape to do the fix, forget where the tape was, and you have no proof.

thank you all, I should have to make one long list.