Ashburn, VA

How much does deck repair cost?
$511 – $2,572

The average cost for deck repair is $100 to $500 for simple repairs with most homeowners spending around $500 - $2,500 for extensive deck repairs. The price can vary greatly by region (and even by zip code). Get free estimates from pros near you.

How Much Does It Cost To Repair A Deck Or Its Boards?

Author: Daniel W.
Millions of people ask HomeGuide for cost estimates every year. We track the estimates they get from local companies, then we share those prices with you.

Should I Repair or Replace my Deck?

If you have an existing deck which is only showing minimal damage or a need for minor repairs, then the cost to repair it will always be significantly less than replacing it entirely.

The average cost for simple deck repairs carried out by a professional typically falls below $500, and from there up to as much as $4,500 for more extensive deck repairs.

If the estimated repairs are extensive, you may be more pleased with a brand new deck while spending just a bit more. The average cost to build a deck is between $4,400 – $10,100, or $25/square foot.

This pricing guide covers:

Average Deck Repair Costs

For simple deck repairs done by the homeowner, where the structural integrity of the deck is still in good standing overall, the average cost is around $100. For a deck that has more serious issues, a homeowner might expect to pay around $1,500—this includes the replacement of railings or boards. Most extensive repair projects total an average of $2,500.

On average, most extensive deck repairs cost between $1,500 and $2,500.

Based on your own knowledge and experience, you will be able to determine if the required repairs are something you can take care of yourself or will need a professional to handle. Never put off maintenance or repairs, because at some point you will be ready to sell the home and it might not sell due to poor maintenance of the deck. Even then, a good contractor can be a marvelous thing.

Deck Lights Landscaping

“Decks and fences are just as crucial when creating landscape architecture. If your deck looks like it’s in bad shape, it could affect the sale of the house.”

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Common Deck Repairs Costs

Deck Repair Type Average Cost
Damaged deck boards $1,280
Loose deck stairs $150 – $300
Missing deck nails $5 – $10
Mold, mildew, and rot $200 – $500
Damaged deck railing $400 – $500
Termites $100 – $300
Stain and seal $3.50/square foot.

Cost To Replace Deck Boards

The main flooring surface of your deck can develop problems through

  1. Extreme weather conditions,
  2. The use of non-pressure-treated wood, or
  3. The lack of subsequent care through reapplying sealants every few years.

Deck Walkout Seating Multi Level

The planks or boards can develop problems like warping and become loose. Depending on the type of wood you have in your deck, the replacement of the boards will cost an average of:

  • $750 for the wood
  • $30 in supplies, including nails and screws, etc.
  • $500 for a contractor to replace the wood
On average, it costs $1,280 to repair damaged deck boards.

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Cost to Stain a Deck

Once repairs are done, you may need to do some sealing or staining so the replacement wood blends in perfectly with the other wood from the original install.

For a contractor to sand, stain, and seal your deck, the average price is $3.50/per square foot.

If you only have a small area that needs to be repaired, you can buy the sealant and stain and complete that portion of the project in your own time.

Deck Stained and Sealed

Average costs for sealant and stain:

Stain - 1 gallon is enough for 400 square feet, and rises from $29 for opaque stain to $45 for semi-opaque stain

Finish - 1 gallon will cover 400 square feet, and polyurethane gloss or satin starts at $37 and goes up to $80 for oil spar varnish.

Sealer - 1 gallon covers 225–325 square feet of sanded wood and 125 square feet for the initial coat on rough-sawn wood, and costs between $16–$18.

Wood preservative - 1 gallon covers 100–300 square feet and costs between $24–$30.

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Loose Deck Stairs Repair Cost

Deck stairs are likely to see more traffic on a daily basis than any other portion of your deck, and they can become somewhat twisted, warped, or bowed from weathering or become loose after a few years. If they have become loose, this can be remedied with new deck screws, or by attaching metal brackets to add more strength.

On the other hand, if the wood has become very damaged from exposure to the elements, it may become necessary to replace a plank or one or two steps. If this is the case, you can either replace a plank yourself or have a contractor come to fix what needs to be addressed for $150–$300 (since many contractors will have a minimum call-out fee).

On average, it costs $150 – $300 for a contractor to replace one or two deck stairs.

Missing Deck Nails Cost

Over the life of your deck, screws and nails can come loose and in extreme cases, fall out—especially on any moving components like a gate, and if the wood has begun to bow or warp. If left untreated, the structural integrity and safety of the deck will continue to worsen. For about $5 you can get between 100–50 deck screws at your hardware store and make the deck a solid structure again.

Fix missing nails and screws yourself for around $5 – $10.

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Deck Rot Repair Cost

In regions of the country that experience more rain, you should always be on the lookout for rot and mold, especially if a deck hasn’t had consistent and regular maintenance, including having the wood resealed and protected. Even though this is something that you should be able to see yourself, having a professional come out and check your deck will do two things:

  1. Catch early indicators for rot and mold that you may not have been able to discover yourself, and
  2. Give you an immediate plan of action, and an estimate for the expense of associated work, which may include drainage work to redirect runoff, or plumbing work to address leaks.

Weight-bearing Rot Damage

If an area that has been damaged by rot is weight-bearing or covers a significant portion of the deck, call your deck installer, or find one here on Homeguide, to address this issue for you.

Generally, for contractors to repair wood damaged by rot, the average cost will be between $200–$500, which will cover the epoxy compounds and the labor cost.

Non Weight-bearing Rot Damage

If it is not weight-bearing, home repairs can be made by cutting any damaged wood out and putting in a two-part epoxy—this comes as a putty like compound which can be sanded smooth once it hardens. You can expect to pay $8–$12 for a half-quart of the cheaper one-component product called Minwax High Performance Wood Hardener, or $35–$70 per quart or $100–$200 per gallon for solutions from LiquidWood and Boatlife.

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Deck Mold and Mildew Removal Cost

Mold and mildew can be tackled with a power wash. You don’t want to damage the wood surface so you will not need an overly powerful washer. If you don’t own a power washer, then you can rent:

  1. An electric one for as little as $30 for four hours or $40–45 for the day.
  2. A gas-powered washer in the 2,000 PSI zone for around $50 for four hours or $80 for the day.

On top of that, you will pay an average of $15 for the cleaning supplies to be applied through a soap nozzle. The cheaper, slower, more labor-intensive process is to take a scrubbing brush and a mix of one gallon of water to ⅓ laundry detergent and get down on your hands and knees to remedy this issue. This method is also much kinder to the wood in your deck, since it is very easy to damage the wood with a power washer if the pressure is too high, or if you focus on one area for too long. You may also need to get some deck cleaning product that contains an oxygen bleach if the mold has already stained the wood.

If you decide to get a contractor to remove mold and mildew, expect to pay approx. $250 for a 12' x 24' – 16' x 20' deck.

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Deck Railing Repair Cost

Over time, railings are a common item in need of repair because of their vulnerability to getting knocked by outdoor furniture, or by children climbing over them, etc. Without the proper maintenance and upkeep to keep rot and water damage at bay, they are even more prone to the need for repair.

At best, they might be loose, and at worst they may be completely broken. The more ornate the railings, the more expensive they are to replace, and the easier they are to damage versus a simple solid piece of wood.

You will either be replacing individual railings or a complete section of railing.

Expect to pay a contractor $400–$500 to replace 25% to 30% of your railings, and as much as $5,000 to replace an entire set of more expensive railings.

Deck Split Level

The following are some examples of big box hardware store rail prices:

Individual balusters:

  • Pressure treated pine 42” x 2” x 2”, $1.55 each in a pack of 16
  • Pressure treated cedar 36” x 2” x 2”, $1.85 each in a pack of 12
  • Ornate classic spindle 36” x 1.36” x 2.12”, $3.28 each in a pack of 7

Deck rail sections:

  • Pressure-treated pine handrail 32” x 2.75” x 6’ long - $38
  • Pressure-treated pine handrail with aluminum balusters x 6’ long - $87
  • Cedar handrail with aluminum balusters x 6’ long - $189

If there are only one or two rails damaged and you are good at DIY, it would likely make more sense financially to tackle this project yourself.

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Deck Termite and Pest Treatment Costs

Owners of wood decks should regularly check for termites. Check out our article on termite treatment costs for information on what types of termites are native to your area and how to spot them.

A contractor might also find the beginnings of a termite colony, or a full-blown infestation, at which point you should hire a pest control company to come out and treat the deck and the surrounding parts of your yard and home before the repair can proceed.

Some companies will offer a termite inspection for free or charge $100–$300, depending on where you live and the size of your home and your deck.

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Choosing Your Deck Contractor

When narrowing down your shortlist of contractors, make sure they all have a certificate of insurance so you know the workers cannot hold you liable for any accident while working on your deck repairs. Ask to see a copy rather than just take their word for it.

Look for companies who include as many as possible of the following criteria:

  • In business for a long time.
  • A or A+ rated on Better Business Bureau
  • Licensed, insured, and bonded
  • A portfolio of before and after photos
  • A scheduled begin and end date
  • Include setup and cleanup costs in the bid
  • Include a warranty on labor and materials used
  • EPA approved and certified — if you hire them to do both the asbestos abatement and remodel
  • Reviews on HomeGuide showing a history of efficiency and excellence

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