Helpful details: which bathroom (primary, hall or powder room), whether it has a fiberglass tub unit or a tiled tub, what bothers you most, and any accessibility needs. If you know whether your home is inside Herndon town limits, include that too. Photos help.
Want a rough number first? Bathroom Brigade's instant bathroom estimate tool emails you an estimate packet based on your photos, measurements and the fixtures and tile you pick. It is a starting point, not a quote.