Does this dining set come with an extension? In other words, does this come as a 7-piece set? Do the delivery people assemble the set when it arrives?

Yes, you can add additional chairs to the set by adding that into the cart to turn it into a 7pc dining set. We can offer white glove delivery for an additional $250 but please contact our LiveChat agents for that addition to your order. Otherwise, it ships free with our curbside delivery program.