Waiting isn't going to help unless you are also airing out the house. Which means keeping windows open during the winter, and while no one lives there.

I would have the ducts cleaned before you move in, even if the builder already did it. Then change your furnace filter every month for maybe the first 3 months. Carpet will take longer to off-gas than wood or tile, so if you are really really concerned, don't choose carpet. If you are having hardwoods finished on-site, choose a waterbased poly. Paint/caulk/glue will all be dry by the time you move in, so don't worry about those.

signed,
someone with several chemical sensitivities.

My son has seasonal allergies and we moved into our new construction in January. About 5 days later, the runny nose, sneezing, etc., started. We were at our ped's office for something unrelated (I was chalking it up to a cold) and she suggested we start his Claritin does at the time, instead of waiting until March. Cleared it right up, and stayed on the Claritin through his allergy season in June. Coincidence, I don't know, but our experience. We did have a ton of dust for months and our vents had been cleaned before we moved in.

I moved into my new construction home immediately. I had the ducts cleaned to remove dust and have an IQAir purifier on the two main floors to help with the air quality. However, I didn't really notice tons of dust in my house.

We are planning to move into a new construction when it is finished end of this year. Some people suggested waiting for an extra month or two before moving in so as to minimize the potentially unhealthy impact of new construction materials on our baby ---- thoughts?