We have been doing window installation out of Garfield for 25+ years. Essex Fells is 9 miles south-west of the shop, in Essex County — well inside the area we work in regularly rather than the edge of it. Either way we still answer when you call about the job two winters later, which is the part that actually depends on being local.
A window replacement is measuring every opening individually, ordering units built to those measurements, then taking out the old window and fitting and sealing the new one the same day. We work one opening at a time, so the house is never standing open and never left open overnight.
Essex spans dense urban Newark and the Oranges, with a great deal of pre-war multi-family stock, through to Montclair, Glen Ridge and South Orange, where Victorians and 1900s colonials with real exterior detail are common, and out to postwar suburbs in the west. Openings move over a century. Frames settle out of square, sills take water, and a window ordered off a standard size will not sit right in a house that has shifted around it. That is why we measure each one rather than measuring a few and multiplying.
Every opening gets its own measurement and its own price. If we take off the trim and find a rotten sill, you get a photograph and a figure before anything is replaced. The units are ENERGY STAR rated for the Northern zone, which is the specification New Jersey actually falls under.