Hardwood that looks tired is usually worn at the surface: scratches in the finish, gray traffic lanes, and color that has faded or yellowed. All of that sits in the top layer, and sanding removes it.
Refinishing is the right call when the boards are still solid and there's enough wood left above the tongue to sand. Solid hardwood can often be sanded several times over its life. Engineered hardwood depends on the thickness of its top layer, and some can be sanded once or not at all.
Replacement makes more sense when boards are cupped or stained from water damage, loose or squeaking across large areas, or already sanded so many times that the tongues show. Spot repairs can fix a few damaged boards, but widespread damage is better addressed with a new floor.
Refinishing also lets you change the look. Once the floor is back to bare wood, you can choose a natural tone, a warmer stain, or a darker color, then seal it with fresh finish coats.
The honest answer depends on your specific floor. We check wood thickness, damage, and past sandings on-site before recommending refinishing or replacement.