Cost factors
Project scope and size
Most hardwood floor refinishers charge by the square foot, and that cost is determined by special features, the number of stairs and any repair work needed. The smaller your project size, the higher the cost per square foot usually is.
You actually save money per square foot when sanding and refinishing large areas of wood flooring. Of course, your overall cost will be higher for bigger projects — like refinishing full-floor wood floors — but flooring professionals can charge less for bigger areas because they already have their employees on-site, the sanding equipment is ready to go and they can purchase materials in bulk.
Below are some national average costs that demonstrate how price per square foot drops as project size increases.
Flooring square footage | Average cost |
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100 - 250 sq. ft. | $600 |
251 - 500 sq. ft. | $750 |
501 - 750 sq. ft. | $1,601 |
751 - 1000 sq. ft. | $2,100 |
1001 - 1500 sq. ft. | $2,350 |
1501 - 2000 sq. ft. | $3,500 |
2001 - 3000 sq. ft. | $5,000 |
As opposed to wide-open hardwood flooring projects, small rooms (such as hall bathrooms) have higher prices per square foot because they include hard-to-reach corners that are tricky to navigate. They require more time- and labor-intensive hand-held methods.
Wood type
Here is a more granular example of price per square foot lowers slightly depending on the total size of the wood flooring from Floorchain Inc. in North Hollywood, California.
Type of wood | Project size | Cost per square foot to refinish wood floors |
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Oak, cherry or walnut | 500 sq ft | $3 |
Oak, cherry or walnut | 2,500 sq ft | $2.70 |
Prep work
Additionally, a floor that is in good condition will often have a lower cost per square foot than an older floor with heavy scratching that needs more prep work.
Other factors that impact overall cost include sub-floor repairs or surface repairs work performed before floor refinishing or if you want old carpet removed from on top of a hardwood floor. If the flooring pros need to make repairs to a hardwood floor during a refinish job, costs will increase. Some flooring pros charge a minimum fee for services when doing small repairs to cover travel expenses as well as the effort of bringing and unloading all the tools, setting up, and then cleaning up. It is most cost-efficient to consolidate repairs with refinishing work if possible.
Special features
If your floor has special features, the cost per square foot can be higher than the cost for a standard refinishing project. Special features can include rooms that are not rectangular or square, having a radiant heating system in the floor, the presence of supports or fixtures installed in the floor, and stairs.
Wood floor finishing and coating costs
The application of a clear coat of oil-based or water-based polyurethane is standard for most refinishing jobs. A good finish protects the hardwood floors from wear and tear, and keeps the hardwood looking well-cared for.
Water-based polyurethane
Expect to pay between $40 and $50 for a gallon of water-based polyurethane. This coating dries quickly and doesn't have as strong an odor as other finishings. However, water-based solutions are more expensive than oil-based polyurethane and are less tough against wear and tear.
Oil-based polyurethane
You'll find oil-based polyurethane gallons priced between $30 and $40, on average. Oil-based finishes are extremely strong and will extend the lifetime of your refinished hardwood floors. They're fairly slow to dry, so you'll have to account for a longer project timeline to allow enough time for two to three coats to completely dry.
Cost to stain hardwood floors
Typically, a gallon of stain will cover 150 to 300 square feet of hardwood floors. High-end stain solutions will be priced around $100 on average, while lower-quality stains will cost around $30. Exact pricing for stains will vary depending on the brand, flooring company, and total square footage of the project.