Refinishing a wood deck usually costs somewhere between a few dollars and about nine dollars per square foot, depending on how much cleaning, stripping, sanding and repair the boards need. One national calculator put the 2026 range at $4.45 to $8.87 per square foot. For a typical 14-by-20-foot deck (280 square feet), that works out to roughly $1,250 to $2,500 before any board replacement. Your own number will land higher or lower based on the condition of the wood, the finish you choose and how the deck is built.
This guide explains what is behind that range, which details move a quote, what a Southeastern Wisconsin deck needs because of our weather, and how to compare estimates fairly.
Key Takeaways
- National per-square-foot ranges are a starting point. A 14-by-20-foot deck often falls between about $1,250 and $2,500 for refinishing alone, and repairs are extra.
- Preparation drives the price. A deck with a failing film finish, graying wood or mildew needs more cleaning, stripping and sanding than one with a worn but intact stain.
- Labor is the largest part of most quotes. Hourly rates for staining and refinishing commonly run $40 to $70 per hour.
- Wisconsin’s freeze-thaw cycles, moisture and a short working season affect how often you refinish and when the work can be done.
- Ask for an itemized, written estimate so you can see prep, repairs, product and coats separately.
Table of Contents
- What refinishing a deck costs per square foot
- What a 14-by-20-foot deck might cost
- What pushes the price up or down
- Refinishing, restoring or repairing: which does your deck need?
- Southeastern Wisconsin conditions that affect cost and timing
- How to read a deck refinishing estimate
- Should you do it yourself?
- Our perspective
- Deck staining and sealing with Full Coverage Painting
- FAQ
- Sources
What refinishing a deck costs per square foot
Published cost guides agree on the shape of the numbers, even when the exact figures differ. Homewyse’s May 2026 calculator lists a national average starting at $4.45 to $8.87 per square foot for refinishing, with the caveat that site conditions and options change the result (Homewyse). Its basic labor line assumes favorable conditions: light scraping of loose finish and two coats of stain or coating.
That last phrase matters. “Favorable conditions” means a deck that is structurally sound and only needs a fresh coat. Many decks are not in that state by the time owners call someone.
Here is how to think about the tiers, using the national range as a frame rather than a promise:
| Deck condition | What the work involves | Where it tends to fall in the range |
|---|---|---|
| Lightly weathered, finish mostly intact | Cleaning, light scraping, one or two coats | Lower end |
| Faded or peeling, some graying | Deep cleaning, brightening, sanding spot areas, two coats | Middle |
| Failed film finish, heavy graying, mildew | Stripping, extensive sanding, cleaning, brightening, full recoat | Upper end |
| Loose boards, rot, popped fasteners | All of the above plus carpentry | Above the range, since repairs are priced separately |
These are our groupings of how the work scales, not published prices. We do not publish set prices for our deck work, because the condition of the wood decides most of the cost and we price each job after seeing it.
What a 14-by-20-foot deck might cost
A 14-by-20 deck is a common size and a useful example. The floor area is 280 square feet. Multiplying by the national range above gives about $1,246 at the low end and $2,484 at the high end. That is arithmetic on a national average, not a quote.
Things the arithmetic leaves out:
- Railings and balusters. Many calculators price by floor area, but a railing with dozens of spindles can take as long to finish as the boards. Ask whether the railings are included in the square footage or priced on their own.
- Stairs. Steps have treads, risers and stringers, and every one needs the same prep as the deck surface.
- Height and access. A deck 10 feet off the ground needs different setup than one near grade.
- Under-deck and lattice areas. Usually not part of a standard refinish unless requested.
So a simple, low deck with a short rail may come in near the national low end, while a raised deck with long railings and two staircases belongs near or past the top.
What pushes the price up or down
Condition and preparation
Preparation is where a good result is decided and where most of the labor goes. Dirt, mildew and old finish all block a new stain from soaking in. The deck must be cleaned, any failing finish removed, and the wood allowed to dry before anything goes on. A deck that has gone gray from sun exposure usually needs a wood brightener or sanding to reopen the surface.
If you are comparing quotes, the prep description tells you more than the price does. Two bids that differ by 40 percent often differ mostly in how much prep is actually planned.
Type of existing finish
Film-forming finishes such as paint or solid coatings peel when moisture gets under them, and removing them takes more time than refreshing a penetrating stain. If your deck has patches of peeling, expect stripping or heavy sanding to be part of the job.
Stain or sealer choice
More pigment generally means a longer life between coats but a more concealing look. Clear sealers show the most wood grain and need the most frequent attention. Solid-color stains hide the grain and last longest. One deck-care guide lists typical lifespans from about 2 years for clear sealers to about 5 years for solid opaque stains (DeckMath), though sun exposure, foot traffic and local weather shift those figures in practice. The product also affects material cost, though for most jobs materials are a smaller share than labor.
Labor
Because refinishing is hands-on work, labor sets the floor for most estimates. Bob Vila reports hourly labor for staining and refinishing commonly falling between $40 and $70. A crew that spends an extra day on prep adds a real amount to the quote, and that is usually the day that determines whether the finish lasts.
Repairs
Boards that are cracked, cupped or soft, and fasteners that have worked loose, should be dealt with before finishing. Staining over a rotted board just covers a problem. Carpentry is typically separate from the finishing price, and any estimate should say so.
Timing and weather
Finishing outdoors depends on dry wood and moderate temperatures. In our region that narrows the window, which is one reason to book earlier in the season rather than waiting for the first warm weekend.
Refinishing, restoring or repairing: which does your deck need?
The words overlap. In practice, contractors and cost guides use them like this:
- Refinishing means removing what is left of the old finish, preparing the wood and applying a new stain or sealer.
- Restoration is a broader term. It usually adds more intensive cleaning, brightening, sanding and sometimes minor board replacement to bring a weathered deck back.
- Repair means structural work: replacing boards, securing railings, fixing loose ledger connections. This is a carpentry and safety question, not a finishing question.
A simple way to sort it out is to walk the deck:
- Press a screwdriver tip into boards and rail posts. If it sinks in easily, the wood is soft and needs replacement, not finishing.
- Check for movement in railings and stairs. Wobbly rails are a repair issue first.
- Look at the surface. Gray but sound wood is a good candidate for restoration. Peeling film means stripping.
- Sprinkle water on the boards. If the water soaks in rather than beading, the finish has stopped protecting the wood. A simple water test like this is a common way to decide when to reseal, and it takes 30 seconds.
If you see structural problems, such as a deck pulling away from the house or sagging framing, have a qualified carpenter or deck builder look at it before you invest in any finish. Local building departments also set permit rules for structural deck work.
Southeastern Wisconsin conditions that affect cost and timing
Milwaukee, Waukesha County and the surrounding communities give decks a hard life. Snow and ice sit on the boards for months, spring thaws soak the wood, and then summer sun dries it quickly. The expansion and contraction opens checks and cracks in the surface, which lets water in and strains the finish.
The Forest Products Laboratory, the U.S. Forest Service’s wood research center, has long advised that exterior decks hold up best when they receive regular applications of a penetrating finish. In a climate with this much freeze-thaw, that advice is practical rather than optional.
Three local points to plan around:
- The season is short. Wood needs to be dry, and daytime and overnight temperatures need to fall inside the range stated on the product label. Always check the label of the specific stain, since requirements differ between products.
- Shade and tree cover. Decks on the north side of a house or under mature trees stay damp longer, grow mildew faster and may need cleaning and refinishing sooner.
- Spring is for cleaning, not rushing. Wood that has just come out of winter holds moisture. Letting it dry thoroughly before staining matters more than getting on the calendar early.
How often should you refinish? Use the finish type as a guide, then trust the water test over the calendar. A deck that still beads water does not need a new coat just because a year has passed, and a deck that soaks water in is overdue regardless of when it was last done. An annual rinse and inspection keeps small problems from turning into stripping jobs, which cost more.
How to read a deck refinishing estimate
An estimate should let you compare jobs, not just totals. Homewyse recommends getting written, itemized quotes from reputable professionals, and that is good practice. Look for these lines:
- Square footage and what it includes. Deck surface only, or rails, stairs and skirting too?
- Preparation method. Washing, stripping, sanding, brightening. Which of these, and on which areas?
- Repairs. Which boards or fasteners will be replaced, and are they priced separately?
- Product. The brand and type of stain or sealer, and the number of coats.
- Drying and conditions. How the crew handles weather delays and wood moisture.
- Protection of the surroundings. Plants, siding, windows and the home’s foundation plantings should be covered.
- Payment terms and scheduling. What is due and when, and how you will be told about changes.
Be cautious about a bid that is far lower than the others with no explanation. The difference may be skipped prep, a single thin coat or a product that does not suit your deck. Be equally cautious about a vague quote with one lump sum.
Should you do it yourself?
Some homeowners do refinish their own decks, and the materials are widely available. The honest trade is time and risk. Prep is physically demanding, a mistake in cleaning or product choice shows up as peeling a season later, and the working window is short here. If you would rather spend your weekends elsewhere, or your deck is large, raised or in poor shape, hiring a painting and staining crew is a reasonable use of the budget, and the price of one thorough job is often less than redoing a failed one.
Our perspective
We see the same pattern on Southeastern Wisconsin decks again and again: the stain was fine, but the preparation was not. A coat applied over dirty, damp or half-stripped wood looks good for a few weeks and then starts to lift.
That is why we put our effort where it is least visible. Careful cleaning, scraping and sanding, then quality stain applied to dry wood, are what we aim to do on every deck. Our approach is built around meticulous prep, clean, precise results, reliable scheduling and clear communication from first visit to final cleanup.
When you compare estimates, we would encourage you to ask what the prep involves before you ask what it costs. A fair price for a well-prepared deck usually serves you better than a low price for a quick coat, because the work is protecting the wood through freeze, thaw and summer sun.
Full Coverage Painting
Deck staining and sealing with Full Coverage Painting
Full Coverage Painting, LLC is based in the Mukwonago area and serves homeowners across the greater Milwaukee region, including Milwaukee, Brookfield, Mequon, Menomonee Falls, Waukesha, Wauwatosa, New Berlin, Pewaukee and West Allis. Deck sealing and staining is one of our core services, alongside interior and exterior painting and drywall repair. Read what to expect from the process on our deck staining service page, see everything we offer on our services page, or request an estimate once you have walked your deck and know what you want addressed. We price after seeing the deck, because condition is what sets the cost.
If you have a fence that needs the same attention, our guide to staining or painting fences covers how the same principles apply there.
FAQ
How much does it cost to refinish a deck?
National guides put refinishing at about $4.45 to $8.87 per square foot as of May 2026 (Homewyse). Heavily weathered decks, raised decks and decks with a lot of railing sit toward the top, and repairs are extra. A written estimate after an on-site look is the only reliable way to get your figure.
How much would a 14-by-20-foot deck cost to refinish?
At 280 square feet, the national per-square-foot range works out to roughly $1,250 to $2,500 for the finishing work. Railings, stairs, board replacement and the condition of the old finish can move that number. Ask any contractor to list those items separately.
How often should you restain a wood deck?
It depends on the product and exposure. Guides list roughly 2 years for clear sealers up to about 5 years for solid opaque stains (DeckMath). In Wisconsin, the water test is a more reliable cue: if water soaks in rather than beading, the finish needs renewing.
Is deck restoration different from refinishing?
The terms overlap, but restoration usually means more intensive cleaning, brightening and sanding on a weathered deck, sometimes with minor board replacement. Refinishing is the stripping and recoating step. A good estimate spells out which tasks are included.
When is the best time to have a deck refinished in Southeastern Wisconsin?
The wood needs to be dry, and temperatures need to suit the product label, so late spring through early fall is typical. Booking early in the season helps, since good working weather is limited here. Contact us for current scheduling rather than assuming a timeline.
Sources
- Cost to Refinish Deck, Homewyse
- How Much Does It Cost to Stain a Deck?, Bob Vila
- Deck Maintenance Guide, DeckMath
- Details for a Lasting Deck, USDA Forest Products Laboratory