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Hardwood floor refinishing in Philadelphia: when to refinish vs replace, and what it costs

Philadelphia is full of homes with original hardwood floors from the 1920s, 1950s, and 1970s. If your floors look worn, dull, or scratched, you probably don't need to replace them. Refinishing restores hardwood to like-new condition for 30–50% of the cost of new installation. Here's how to decide whether to refinish or replace, and what the job actually costs.

Can your floors be refinished?

Most solid hardwood can be refinished multiple times over its lifetime. The limiting factor is how much material is above the tongue-and-groove joint. Each refinishing removes a thin layer of wood, so floors can typically be refinished 3–5 times before they run out of usable material. A simple pencil-and-light test: if you can see the top of the groove when you shine a flashlight at a low angle, the floor is likely too thin to sand again.

Engineered hardwood can often be refinished once or twice, depending on the veneer thickness. Floors thinner than 2mm of top veneer are generally not refinishable.

Signs your floors need refinishing (not replacing)

• Surface scratches that haven't penetrated the wood itself
• Dull, worn finish that no longer reflects light
• Slight color variation from years of sun exposure
• Minor scuffs and surface staining
• Finish peeling or flaking in high-traffic areas

Signs you may need replacement instead

• Boards that are soft, spongy, or have visible rot (moisture damage)
• Significant cupping or crowning that didn't flatten after drying
• Boards that are cracked or split through the tongue-and-groove
• Previous repairs with mismatched wood that can't be blended
• Floors that are already at minimum thickness from previous refinishing

What the refinishing process looks like

Day 1 — Sanding: The floor is sanded with a drum sander to remove the old finish and a layer of wood, then edge-sanded around the perimeter, then screen-sanded to even out the surface. The floor is vacuumed and tacked clean before staining.

Staining (optional): If you want to change the color, stain is applied and allowed to dry for several hours. Staining doesn't add significant cost but does extend the project by half a day.

Finish coats: Typically 2–3 coats of polyurethane, with light sanding between coats. Oil-based finish is more durable and has a warmer amber tone; water-based dries faster and stays clearer. Final coat goes on the last day.

Cost of hardwood refinishing in Philadelphia

Area	Typical cost
Single room (200 sq ft)	$600–$1,000
Living + dining room (500 sq ft)	$1,500–$2,500
Full first floor (900 sq ft)	$2,700–$4,500
Full house (1,500 sq ft)	$4,500–$7,500

Pricing is typically $3–$5 per square foot for a standard sand-and-finish. Adding stain adds roughly $0.50–$1 per square foot. Repairs to individual boards are quoted separately.