Matte paint upgrade
I'm building a new house in the Northeast, and we're getting ready to choose paint. The builder's default paint for walls is BM Regal in flat sheen. I inquired about cost of doing all the walls in Matte instead, and got a quote of $1500 for the whole house. The house is 5 bedrooms, 4 baths, total about 3500 sq. ft plus garage.
Is that reasonable? I'm not very familiar with painting (done some basic DIY, but don't know much), it seems that paint materials price difference is probably ~$500 (if that). Is there substantially more labor involved in doing matte? The house is already sheetrocked and taped; the price upgrade is coming from the paint guy.
I'm primarily looking to get a sense whether this is reasonable upcharge from flat, or something I need to question the builder.