How much does it cost to refinish hardwood floors?

Refinishing commonly runs a few dollars per square foot plus add-ons. For 400 sq ft at $3/sq ft with a $200 stain and 10% contingency, that is about $1,540 — enter your own quoted prices for your figure.

Is refinishing cheaper than replacing hardwood?

Usually much cheaper — often less than half the cost of a new install — because there is no new material to buy, deliver and acclimate. It only works if the existing floor is sound and has enough wood left to sand.

How many times can hardwood be refinished?

Solid hardwood can typically be sanded and refinished several times over its life, since each sanding removes only a little thickness. Engineered wood can be refinished only if its veneer is thick enough; thin-veneer products cannot.

What is a screen and recoat?

A light abrasion of the existing finish followed by one fresh coat — no full sanding to bare wood. It refreshes a dull but not worn-through floor for far less than a full refinish and delays the need for one.

Hardwood floor refinishing cost & when it's worth it

A tired hardwood floor is rarely a lost floor. Sanding off the old finish and recoating brings it back for a fraction of a replacement — here is how to budget it and how to know when refinishing beats buying new.

By Francesco Zinghinì

The formula

total = (area_sqft × $/sqft + add_ons) × (1 + contingency%)

Refinishing is priced per square foot of floor, plus add-ons for stain, an extra coat or board repairs, with a contingency for surprises (a soft board, a stubborn old finish). The refinishing cost calculator itemizes it.

Worked example

Refinishing 400 sq ft at $3/sq ft, with $200 for a stain color change, 10% contingency: (400 × $3 + $200) × 1.10 = (1,200 + 200) × 1.10 = 1,400 × 1.10 = $1,540. Compare that to installing new hardwood in the same room — at ~$8/sq ft material plus labor that is well over $3,500 (see the installation cost tool). Refinishing is often less than half the price of replacing.

What the job involves

Sanding — a drum or belt sander takes the floor to bare wood, an edger reaches the perimeter (floor sanding cost).
Repairs — replacing cracked boards, filling gaps and nail holes.
Stain (optional) — a color change adds a day and material cost.
Finish coats — typically 2–3 coats of polyurethane (oil or water-based), with dry time between.

It is dusty, smelly and multi-day — but it does not require buying, delivering and acclimating a whole new floor, which is why it is so much cheaper.

When to refinish vs replace

Refinish when the floor is structurally sound, the boards are solid (or engineered with a thick enough veneer to sand), and you have enough wood left. Solid hardwood can usually be refinished several times over its life; each sanding removes a little thickness. Replace when the boards are cupped, water-damaged, riddled with deep gaps, or already sanded so thin the tongue-and-groove is at risk — or when it is engineered with a paper-thin veneer that cannot take a sanding.

Screen-and-recoat: the cheap middle option

If the finish is dull but not worn through to bare wood, a screen-and-recoat (a light abrasion plus one fresh coat — no full sanding) refreshes the sheen for far less than a full refinish. It buys years before the floor needs the real thing. Price the full job, then ask your finisher whether a recoat would do.

How much wood is left to sand?

Refinishing works only if there is enough wood above the tongue-and-groove to remove a thin layer safely. Solid hardwood has plenty — typically good for several sandings over its life. Engineered wood is the question mark: it can be refinished only if its real-wood veneer (the wear layer) is thick enough, often around 2 mm or more; a thin 0.6–1 mm veneer cannot take a full sanding and must be recoated or replaced instead. Before you plan a full refinish, check a floor-vent edge or a doorway threshold to see the board’s cross-section, or pull a register to gauge the veneer.

Oil-based vs water-based finish

The topcoat is a real choice. Oil-based polyurethane is inexpensive, very durable, and ambers the wood to a warm tone over time — but it smells strong and cures slowly (days before furniture returns). Water-based finish dries fast, has far less odor, stays clear (no yellowing), and now matches oil for durability — at a higher material cost and, often, an extra coat. Water-based lets you use the floor sooner, which matters if it is the only path through the house. Either way, factor the added coat or premium finish as an add-on in the refinishing cost tool.

Dust, cure and living around the job

A full sand-and-finish is disruptive in ways the price does not show. Sanding throws fine dust (dustless systems help but rarely eliminate it), the finish needs the room empty, and each coat has to cure before the next — so plan on the room being out of use for several days, longer with oil-based and a stain step. Stain adds a whole day and its own cure. None of this changes the square-foot math, but it changes the plan: clear the room, seal off doorways, and line up somewhere else to be while it cures.

Refinish, recoat, or replace — a decision path

Finish dull but not worn through? A screen-and-recoat is the cheapest fix — a light abrasion and one coat, no full sanding.
Worn to bare wood, scratched, or changing color? A full sand-and-finish — the case this guide budgets.
Cupped, water-damaged, deeply gapped, or sanded too thin? Now compare against a new floor with the installation cost tool.

Pricing all three keeps the decision honest: refinishing is usually far less than half a replacement, and a recoat is a fraction of a refinish — so the right answer is often the least disruptive one, not the most.

This is a planning estimate from the numbers you enter, not a bid. Refinishing cost depends on floor condition, board repairs, stain choice, number of coats and local labor — get itemized written quotes from a licensed, insured flooring professional before you commit.