Any screen size mounted level and anchored into studs, with the cables out of sight.

There is no single number, because these four things change it. Tell us about them and you get one fixed price before we start.
In Nashville: Brick and stone fireplace surrounds are common in older Nashville homes, and masonry needs completely different anchors than drywall. That is why the quote form asks about the wall — so we arrive with the right hardware instead of making a second trip.
Real jobs, photographed as we left them. No stock photography.
Tell us the job and your town. You get a fixed price before anyone shows up.
Prefer to talk? (629) 468-8960