Hardwood Floor Refinishing Cost Calculator
Hardwood Floor Refinishing costs $1,525 to $2,325 for a typical 500 sq ft job in 2026, against a national benchmark of $1,875. Labor runs 18 crew hours at $35.21 an hour. Enter a ZIP code to apply that area's measured wages for this work and its regional price level.
What makes up the price
Cost by size
National averages, before any local adjustment. Computed from the same model as the calculator above, so the two always agree.
| Floor area | Sq ft | Typical | Range |
|---|---|---|---|
| 275 sq ft | 275 | $1,175 | $975 to $1,475 |
| 400 sq ft | 400 | $1,575 | $1,275 to $1,950 |
| 500 sq ft | 500 | $1,875 | $1,525 to $2,325 |
| 675 sq ft | 675 | $2,400 | $1,975 to $2,975 |
| 850 sq ft | 850 | $2,950 | $2,400 to $3,650 |
Check whether you need a full sand first
This is the whole page, and almost nobody does it before calling.
Sand and refinish takes the floor down to bare wood with three grit passes, then puts three coats back. Three to five days, around $3.75 a square foot, and it can fix anything that is in the wood: scratches, dents, fading, old stain, a color you have stopped liking.
Screen and recoat abrades the existing finish with a buffer and lays one fresh coat on top. One day, around $1.60 a square foot, and it fixes only what is in the finish — dullness, scuffs, fine scratches that have not reached the wood.
So the question is whether the wear is in the finish or in the wood. Two tests, both free:
- Drop water on the worst spot. If it beads and sits there, the floor is still sealed and a recoat will bond. If it darkens the wood or soaks in, the finish is gone and a recoat would just be a coat of poly on dirty wood, which peels.
- Look for gray. Gray or black patches mean water has been in contact with bare wood. That is past recoating.
If the floor passes both, a recoat gets you a floor that looks refinished for under half the money, in a day, with none of the dust.
Why that matters more than the price
A solid three-quarter inch floor has roughly four to seven full sandings in it, total, forever. Each one takes a fraction of a millimeter off and brings the nails that bit closer to the surface. After the last one the floor is finished, and the only thing left is replacing it.
Recoats remove nothing. Done every five years or so, they are how a floor gets to be a hundred years old.
So a contractor who quotes a full sand on a floor that only needed a recoat is not just overcharging — they are spending something you cannot get back. It is worth asking, in those words, why a full sand is necessary.
Engineered wood is a different conversation. It can be sanded only if the wear layer is thick enough: 3mm or more usually takes one sand, 2mm is marginal, and under 2mm cannot be sanded at all without going through to the plywood. Measure at a vent or a threshold before anybody starts.
What the price turns on
How much floor
Per square foot, a bigger floor is cheaper. The machines have to arrive, the containment has to go up and the base shoe has to come off whatever the size, so 300 square feet runs about $4.25 a foot and 2,000 runs about $3.25. A single small room is the worst value on this page, which is a reason to do the hallway at the same time.
Whether the color changes
A stain is most of an extra day. It is applied, wiped back before it sets, and then nothing can touch it for twenty-four hours. The sand has to be finer and more even too, because stain shows every scratch a clear finish would have hidden. About 30% more, and the one part of the job where going cheap shows.
If you are staining, insist on sample patches on your own floor — not a fan deck. The same stain on red oak, white oak and maple gives three different colors, and the one on the card is on none of them.
Which finish
- Oil-based polyurethane is the hardest wearing per dollar and the cheapest. It ambers over the years, which looks right on oak and muddy on maple. Overnight between coats, strong solvent smell for days, and a week before furniture goes back.
- Water-based polyurethane stays the color you chose, has far less odor, and dries in two or three hours — so the whole job can be coated in a day and walked on that evening. About 10% more, and worth it if you are living in the house.
- Penetrating hardwax oil soaks in rather than forming a film. Matte, very natural looking, and its real advantage is that a damaged patch can be repaired in place instead of resanding the room. About 20% more, and it wants re-oiling every few years.
Board repairs
Sanding fixes scratches, dents and dullness. It does not fix:
- Pet stains. The urine is in the wood and usually through to the subfloor, and the black mark comes back up through the new finish. The board has to come out.
- Cupping from below. A board that has curled because of moisture under the floor will cup again until the moisture is dealt with.
- A gap where a wall was removed, which needs boards woven in rather than butted.
Replacement boards are the slowest work on the job, because matching old wood to new is a hunt. Expect 15% more for a few boards and 40% for a whole area.
What living through it is like
Dust is the thing nobody warns about. Modern dustless systems — a HEPA extractor connected to the sander rather than a bag — genuinely work and get most of it, but "dustless" is a marketing word and fine dust still finds the tops of door frames. Take pictures off the walls.
Rough timeline for a full sand with oil-based finish:
- Day 1 — furniture out, base shoe off, sanding.
- Day 2 — edges, corners, filling, first coat.
- Day 3-4 — buff and coat, buff and coat.
- Then — walk on it in socks after 24 hours, furniture back after a week, no rugs for two to four weeks while the finish fully cures.
Water-based compresses that to two days and a few days of curing. Either way you cannot live in the room, and oil-based means you probably cannot live in the house.
Questions worth asking
- Does this floor actually need a full sand? And why, specifically.
- How many coats? Three is standard; two is a corner being cut.
- Which product, by name? And oil or water-based?
- Is dust extraction connected to the sander, or is it a bag?
- Are the stain samples done on my floor?
- Is the base shoe removed and refitted, or is the sander going up to it?
- How long before furniture and rugs go back?
Common questions
How much does it cost to refinish hardwood floors?
Around $1,875 for 500 sq ft sanded and refinished in the same color, with most jobs that size falling between $1,525 and $2,325 — about $3.75 per square foot. A new stain color adds roughly 30%. Bigger floors are cheaper per foot: 300 sq ft runs about $4.25 a foot and 2,000 sq ft about $3.25.
What is the difference between a screen and recoat and a full refinish?
A full refinish sands the floor to bare wood in three grit passes and puts three coats back — three to five days, around $3.75 a square foot, and it can fix anything in the wood. A screen and recoat abrades the existing finish with a buffer and lays one coat on top — one day, around $1.60 a square foot, and it fixes only what is in the finish. The recoat removes no wood at all, which matters because a floor has a limited number of sandings in it.
How do I know if I need a recoat or a full sand?
Two free tests. Drop water on the worst spot: if it beads and sits, the floor is still sealed and a recoat will bond; if it soaks in or darkens the wood, the finish is gone and a recoat would peel. Then look for gray or black patches, which mean water has been against bare wood and is past recoating. If the floor passes both, a recoat gets you a floor that looks refinished for under half the money.
How many times can a hardwood floor be refinished?
A solid three-quarter inch floor has roughly four to seven full sandings in it over its whole life. Each one takes a fraction of a millimeter off and brings the nails closer to the surface; after the last one the only option left is replacement. Recoats remove nothing, so a floor recoated every five years or so can last a century. That is why a full sand on a floor that only needed a recoat is spending something you cannot get back.
Can engineered hardwood be refinished?
Only if the wear layer is thick enough. At 3mm or more it will usually take one sanding; 2mm is marginal and wants a very light hand; under 2mm cannot be sanded at all without going through to the plywood underneath. Measure the wear layer at a floor vent or a threshold before anybody starts, because this is not recoverable. A screen and recoat is safe on any thickness, since it never reaches the wood.
Does a stain color change cost more?
About 30% more. The stain is most of an extra day on its own — applied, wiped back before it sets, then left for twenty-four hours before anything goes over it — and the sand has to be finer and more even beforehand, because stain shows every scratch that a clear finish would have hidden. Insist on sample patches on your own floor rather than a fan deck: the same stain gives three different colors on red oak, white oak and maple.
Oil-based or water-based polyurethane?
Oil-based is the hardest wearing per dollar and the cheapest, but it ambers over the years — right on oak, muddy on maple — needs overnight between coats, and smells strongly for days. Water-based stays the color you chose, has far less odor and dries in two or three hours, so the floor can be coated in a day and walked on that evening; it costs about 10% more. If you are living in the house during the work, water-based is usually the answer.
What is hardwax oil and is it worth the extra?
It penetrates the wood rather than forming a film on top, giving a matte, very natural look. It costs about 20% more and wants re-oiling every few years, but its real advantage is repairability: a damaged patch can be fixed in place, where a polyurethane floor has to be resanded across the whole room to blend. In a house with dogs or children that is worth a great deal more than it sounds.
Can sanding fix pet stains?
No, and this is the most common disappointment on the job. The urine has gone into the wood and usually through to the subfloor, so the black mark comes back up through the new finish however deep the sanding goes. The board has to come out and a new one be woven in. The same is true of a board that has cupped from moisture underneath, which will cup again until the moisture is dealt with.
How long does refinishing take and can I stay in the house?
A full sand with oil-based finish is three to five days of work: sanding, then edges and the first coat, then buff and coat twice. You can walk on it in socks after 24 hours, put furniture back after a week, and lay rugs after two to four weeks while the finish cures. Water-based compresses that to about two days with a few days of curing. You cannot use the rooms either way, and with oil-based the solvent smell usually means leaving the house.
Is dustless sanding really dustless?
It is much better and it is not dustless. A HEPA extractor connected directly to the sander catches most of what a bag misses, and the difference is dramatic rather than marginal. Fine dust still settles on the tops of door frames and inside nearby cabinets. Take pictures off the walls, seal doorways to the rest of the house, and ask whether the extraction is connected to the machine or standing in the corner.
Is refinishing cheaper than replacing the floor?
Substantially, as long as there are sandings left in the boards. Refinishing 500 sq ft is around $1,875; new engineered hardwood over the same area, with the old floor taken up and hauled away, is two to three times that. The calculation changes once the floor has been sanded to the limit, or if the wear layer on an engineered floor is under 2mm — at that point a recoat is the only thing keeping it going, and replacement is the honest comparison.
Where these numbers come from
Nothing here is copied from a contractor directory. Labor is priced from what the trades are actually paid, materials from published producer prices, and both are adjusted to your area using federal cost-of-living data.
- Flooring contractors, United States: $35.21/hour, August 2026 (BLS CES CES2023833003)
- Sanding belts, edger discs, screens and filler: $0.22 per sq ft (price recorded October 2026, not index-adjusted)
- Polyurethane floor finish: $58.00 per gallon (price recorded October 2026, not index-adjusted)
- Drum sander, edger and buffer hire: $95.00 per day of machine hire (price recorded October 2026, not index-adjusted)