Cost to Refinish Hardwood Floors: What Drives the Quote

Updated September 2026 · Home Project Resources

The cost to refinish hardwood floors is built from five measurable things: the square footage of floor, how many sanding passes the wood actually needs, which finish goes on and how many coats, how much prep and repair the room demands, and how hard the site is to work in. Everything else on a bid is a consequence of those five.

The biggest single swing is whether your floor needs a full sand down to bare wood or just a screen and recoat. Those are two different jobs, days apart in labor, and plenty of floors that get quoted for a full sand only needed the lighter one.

Updated September 2026

A note on numbers. This page covers scope, specifications, and the line items that belong on a written quote, not dollar figures. Refinishing is priced per square foot, per stair tread, and per coat, and those rates move sharply by region, by species, and by crew. Compare three written bids using the checklist near the end instead.

Measure your floors before the first estimator walks in. Run each room through our free square footage calculator, including closets and hallways, and total it up. Almost every line on a refinishing bid is priced off that number, so knowing it lets you check whether a quote is describing your house or someone else's.

What goes into the cost to refinish hardwood floors

A refinishing quote is not one price with a bit of labor attached. It is a stack of separate operations, and a good bid names each one.

Ask for that breakdown in writing. A one-line bid that says "refinish floors" gives you nothing to compare against another bid, and it is where every misunderstanding starts.

Screen and recoat versus a full sand

This is the decision that changes the size of the job, so make it first and make it honestly.

Test which one you need. Pick an inconspicuous spot, put a few drops of water on the finish, and wait ten minutes. If the water beads and wipes away clean, the finish is intact and a screen and recoat will work. If it darkens the wood or soaks in, the finish is worn through and a recoat has nothing to bond to.

A screen and recoat also fails on any floor with wax on it, or with a factory aluminum oxide finish that has not been fully abraded. If your bid includes a recoat over an unknown factory finish, ask what adhesion test the crew is running first.

How many times can a floor be refinished?

The answer sits in the wood above the tongue, and it is the number that decides whether refinishing is even on the table.

Check yours by pulling a floor register and looking at the cut edge of a board. You can see the wear layer directly. On an engineered floor you will see the veneer sitting on a plywood core, and its thickness is the whole story.

If the nail heads are showing or a board edge feels like a ridge under your sock, the floor is at the end of its sanding life. That is a replacement conversation, and our hardwood flooring cost guide covers what that scope looks like.

The sanding sequence, and why passes matter

Sanding is not one operation. It is a grit sequence, and skipping steps is the most common way a refinishing job goes wrong in a way you only see after the finish dries.

1. First cut, 36 to 40 grit. Only used when the floor has heavy finish, paint, adhesive, or serious cupping. Aggressive and it removes real wood.
2. Second cut, 50 to 60 grit. The workhorse pass on most floors. Removes the old finish and the scratches from the first cut.
3. Third cut, 80 grit. Flattens and refines. On soft species this is often where you stop before buffing.
4. Final cut, 100 to 120 grit. Prepares for finish. Going finer than 120 can actually close the grain and make stain go on blotchy.
5. Edger and corner work at each grit. The perimeter has to track the field, or you get a visible halo around the room.
6. Buff or hard plate. Blends the edger scratch with the drum scratch so light does not reveal the seam.

A floor in good shape may start at 50 grit and take three passes. A painted-over floor may need four passes starting at 36. That difference is real labor hours and real abrasive, and it is why an estimator should look at your floor rather than quote off a phone call.

Finish options and what each one asks of you

The finish decides your dry times, your smell, your color over time, and how the floor holds up.

Most floor finishes publish coverage in the range of 400 to 600 sq ft per gallon per coat, with water-based products usually applied at the lower end because thin coats are the point. That is how you sanity-check a materials line: floor area times coats, divided by coverage, equals gallons.

The scheduling consequence matters more than people expect. An oil-based job with 24 hour recoat windows can hold your kitchen hostage for a week. A water-based job with 3 hour windows can put three coats down in one long day.

Prep and repairs that show up as separate lines

These are the items that turn a simple bid into a bigger one, and each should be listed on its own.

• Board replacement. Damaged, split, or rotted boards get woven in. Matching species, width, and grain direction all take time, and new wood always takes stain slightly differently.
• Face nail and countersink. Loose boards get nailed and the holes filled. A squeaky floor is not fixed by refinishing.
• Gap filling. Trowel filler across the whole floor, or individual splines in wide gaps. Whole floor filling is a separate operation with its own dry time.
• Pet stain treatment. Black stains are usually urine that has reached the subfloor. Sanding rarely removes them. Honest options are board replacement, a dark stain to disguise, or living with it.
• Carpet tack strip and staple removal. If carpet just came up, every staple has to go before a drum touches the floor.
• Adhesive or paint removal. Old mastic and paint clog abrasive fast, which shows up as extra material and extra hours.
• Base shoe. Removing and reinstalling quarter round lets the crew get closer to the wall. Some bids include it, many do not.
• Stairs. Almost always priced per tread and riser, not by area, because every square inch is hand work.

Worked example: 640 square feet plus a hallway

Take a house with a living room 16 ft by 22 ft, a dining room 12 ft by 14 ft, and a hallway 3.5 ft by 24 ft. All red oak, all site-finished, sanded once about twenty years ago.

• Living room: 16 x 22 = 352 sq ft
• Dining room: 12 x 14 = 168 sq ft
• Hallway: 3.5 x 24 = 84 sq ft
• Total: 604 sq ft

Water test says the finish is worn through in the traffic lane, so it is a full sand. The floor has no paint and no cupping, so the crew starts at 50 grit, goes to 80, finishes at 100, then buffs. Three passes, not four.

Finish choice is water-based, three coats. Materials math: 604 sq ft x 3 coats = 1,812 sq ft of coverage needed. At 500 sq ft per gallon that is 3.6 gallons, so the crew is buying 4. Add a gallon of sealer if the product line uses one.

Schedule: day one is prep and sanding, day two is the last cut, buff, vacuum, tack, and first coat, day three is coats two and three with abrasion between. Furniture back on day five, area rugs after two weeks so the finish can cure.

Now change one input. Say there are also 13 stairs with treads and risers. Stairs get quoted per tread, they are entirely hand sanding, and they can add a full day for a two-person crew. That single addition can move a three-day job to four and change the shape of the quote more than another 200 sq ft of flat floor would.

Site conditions that move the number

• Furniture. A house emptied by the owner is a different job from one where the crew moves a piano and a china cabinet.
• Stairs to the work area. Second floor floors mean every machine, every bag of abrasive, and every gallon goes up and comes back down.
• Closets and small rooms. More perimeter per square foot means more edger and corner time, which is the slow part.
• Occupied home. Containment, air scrubbers, and working around a family costs hours a vacant house does not.
• Old finish type. Wax, shellac, and some factory finishes load abrasive quickly.
• Species. Harder wood cuts slower. Red oak sits at 1,290 on the Janka scale, white oak at 1,360, hard maple at 1,450, and hickory at 1,820. Maple also shows every scratch, so it demands a finer final grit and a more careful buff.
• Pine and fir. Soft, roughly 690 on the Janka scale for southern yellow pine, and it dents while the crew works. It needs a lighter touch and often a different grit plan.
• Dust containment level. Vacuum-assisted sanding with sealed containment is a real spec, and it belongs on the bid if you are paying for it.

If your house was built before 1978, painted surfaces in the work area fall under the EPA lead renovation rule, and the firm doing the work should be certified. You can verify a firm on the EPA lead program site.

What a scope of work should say

Hand this list to each bidder and ask them to answer every line in writing. A bid that answers all of these can be compared to another bid that answers all of these. That is the whole trick.

1. Exact square footage being refinished, by room, including closets.
2. Whether stairs are included, and how many treads and risers.
3. Full sand or screen and recoat, and the grit sequence for a full sand.
4. Dust containment method and whether air scrubbers are used.
5. Product name and line for sealer, stain, and finish. Not "commercial grade poly."
6. Number of finish coats, with abrasion between coats stated.
7. Sheen, in writing, and whether a sample board gets made first.
8. Who moves furniture, and whether appliances are included.
9. Whether base shoe is removed and reinstalled.
10. Repair allowance: how many board replacements are included, and what happens beyond that.
11. Gap filling: whole floor, spot, or none.
12. Schedule, including dry times and when you can walk on it, put furniture back, and lay rugs.
13. Cleanup and waste removal, including who takes the old base shoe.
14. Warranty on the finish and on adhesion, and what voids it.
15. Payment schedule tied to milestones, not to dates.

How to compare bids without guessing

Line the three bids side by side and check that each is describing the same job. Most of the time they are not, and the gap between them is scope rather than value.

• Compare the square footage first. If one bid says 604 and another says 700, one of them measured wrong or included the stairs.
• Compare coats. Three coats versus two is a real difference in material and a real difference in life.
• Compare product lines. A two-component water-based finish and a builder-grade oil poly are not competitors.
• Compare what is excluded. Exclusions are where the change orders come from.
• Compare dust control. Sealed containment and a shop vac taped to a sander are not the same service.
• Compare the schedule. Extra days in your house have a cost even if it never appears on paper.

Our guide on how to compare contractor bids walks through the scoring method, and contractor red flags covers the warning signs that end a conversation early.

Frequently asked questions

How long does refinishing hardwood floors take?

Plan three to five days for a typical single-level job with a water-based finish, and up to a week with oil-based because of the longer recoat windows. Sanding is usually one to two days, and the rest is coats and dry time.

Can I stay in the house during the work?

You can if the crew can seal off the work area and you have another way to reach a bathroom and a bed. Oil-based finishes have a strong odor for several days, so many families leave for those nights. Water-based products make staying much more practical.

Do I have to remove the baseboards?

No. Base shoe or quarter round usually comes off so the edger can get closer to the wall, but the baseboard itself stays. If a bid includes removing full baseboard, ask why, because reinstalling and repainting it is a separate trade.

Will refinishing fix squeaks and gaps?

Squeaks come from the subfloor and fasteners, so refinishing does not fix them unless the crew face-nails loose boards first. Gaps can be filled, but seasonal gaps will reopen in winter, which is why many pros fill only the wide ones.

Is a buff and coat worth doing instead?

Yes, if the finish is worn but the wood underneath is not scratched or stained. It costs less, takes about a day, and it extends the life of the floor so you use up fewer of your limited full sandings.

How soon can I put the furniture back?

Usually 24 to 48 hours for light foot traffic, and longer before furniture returns. Rugs are the real wait: give a water-based finish about two weeks and an oil-based finish closer to a month before anything covers the surface.

Does the wood species change the job?

It changes the grit plan, the dry time for stain, and the risk of blotching. Maple and birch are dense and tight grained, so they need finer sanding and often a conditioner before stain. Pine dents easily and takes stain unevenly without a wash coat.

Is refinishing better than replacing?

If the floor has enough wear layer left, refinishing keeps the original wood and skips the demolition entirely. Once the wear layer is gone, or a large share of boards are damaged, replacement wins. Our comparison of hardwood versus engineered wood helps if you are choosing new material.

Related reading

• Hardwood flooring cost for what a new floor scope covers
• Cost to install flooring to compare across materials
• Hardwood vs engineered wood for the wear layer question
• How to compare contractor bids for the side by side method
• Square footage calculator to measure every room before bidding