Fence sealing typically costs $1-$3 per square foot for professional work, with many homeowners paying about $1,200-$3,000 for a standard 6-foot wood fence. The final price depends on fence length, whether one or both sides are sealed, cleaning and repairs, wood condition, and local labor rates.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Professional sealing per sq ft | $1 | $2 | $3 | Surface area sealed; prep may be extra |
| 150-linear-foot fence, one side | $450 | $900 | $1,350 | About 900 sq ft at 6 feet tall |
| 150-linear-foot fence, both sides | $900 | $1,800 | $2,700 | About 1,800 sq ft total |
| DIY materials | $0.20 | $0.45 | $0.85 | Per sq ft, excluding tools and labor |
| Cleaning and prep | $150 | $350 | $700 | More for heavy mildew or peeling finish |
Typical sealing prices for a 6-foot wood fence
Contractors generally price fence sealing by the exposed surface area, not simply by linear footage. A 6-foot fence has about 6 square feet per linear foot on one face, or roughly 12 square feet per linear foot when both faces are treated. Gates, lattice, uneven terrain, and intricate pickets can add time and material.
For a typical 150-foot fence, budget about $900-$1,800 for one side or $1,800-$3,600 for both sides, including ordinary prep. The lower end assumes sound, accessible boards and a basic clear sealer. The higher end can reflect washing, minor repairs, premium water-repellent products, or elevated regional labor rates.
At $1-$3 per square foot, a 100-foot, 6-foot fence costs about $600-$1,800 for one side and $1,200-$3,600 for both sides. A 200-foot fence doubles those surface-area estimates. Quotes may use a minimum service charge, so a short fence can cost more per square foot than a larger job.
Assumptions: standard 6-foot wood privacy fence, average access, sound boards, and no major repairs. One face is counted as 6 sq ft per linear ft.
What cleaning, sealer, and labor add to the quote
A professional estimate usually separates surface preparation from product application, though some companies bundle the work. Ask whether the price covers both fence faces, cleaning, drying time, protection of nearby surfaces, and removal of debris. The table shows typical U.S. ranges; actual charges vary by wood condition and contractor minimums.
| Quote component | Typical price | Unit or scope | What changes the charge |
|---|---|---|---|
| Sealer product | $0.20-$0.85 | Per sq ft of coverage | Coverage rate, product grade, and number of coats |
| Labor to apply | $0.60-$1.75 | Per sq ft | Spraying versus brushing, picket detail, and access |
| Wash and surface prep | $150-$700 | Per job | Mildew, dirt, old coating, and rinse requirements |
| Minor board or hardware repair | $10-$50 | Per board or repair | Board size, matching material, and labor |
| Mobilization or small-job minimum | $150-$400 | Per visit | Travel, setup, and crew scheduling |
For labor billed by time, a small crew may charge about $50-$100 per worker-hour, while a two-person crew can finish a straightforward 150-foot fence in roughly 6-12 labor hours, including application and setup. Drying time between washing and sealing may extend the project over multiple days even when active work is limited.
Prep can represent a substantial share of the bill when the fence is dirty, damp, or coated with a finish that will not accept new sealer. A quote that is much lower may exclude washing or count only one face, so compare the stated scope rather than the total alone.
How fence height, both sides, and wood condition change the price
Surface area is the most direct price driver. Moving from a 4-foot fence to a 6-foot fence increases treated area by 50% at the same length. Treating both sides roughly doubles the area, although shared setup and travel charges mean the total may not double exactly.
Fence design also affects production. Solid privacy panels are generally faster to coat than closely spaced pickets, lattice, or decorative rails. A contractor may charge 10%-30% more for intricate surfaces because they require more careful application and have more edges per square foot. Sloped yards, dense shrubs, and narrow access can add setup time as well.
Wood condition matters, too. New cedar or pressure-treated lumber may need to dry before sealing; applying product too early can interfere with absorption. For many new fences, contractors recommend waiting several weeks to a few months, depending on moisture, weather, and manufacturer instructions. Weathered, porous boards may use 20%-50% more sealer than a smooth, sound fence.
Old paint or a film-forming coating is not always compatible with clear sealer. If the existing finish is peeling, the contractor may need to strip or sand it rather than simply wash and coat the surface. That additional removal can add $0.50-$2 per square foot, depending on access and how much coating must come off.
Two details that often change a quote by hundreds of dollars are total treated area and whether old finish must be removed. Confirm dimensions and identify the existing coating before comparing bids.
How U.S. labor markets shift fence sealing estimates
Prices commonly run 15%-30% above national midrange in high-cost metro areas, including parts of the Northeast, West Coast, and major coastal cities. Higher wages, insurance, travel, and business overhead contribute to the difference. A $2-per-square-foot estimate in a lower-cost market might reach $2.30-$2.60 in an expensive urban market for the same scope.
Rural areas can be 10%-20% below metro pricing when labor is readily available, but long travel distances may offset the savings. Contractors sometimes apply a trip charge of $50-$200 or a minimum fee for a small project. In suburban markets, pricing often falls between rural and high-cost urban rates, though local competition and seasonal demand matter.
Climate affects the schedule more than the quoted unit rate in many cases. Rain, high humidity, or temperatures outside a sealer’s application range can delay work. In regions with short dry seasons, contractors may book up quickly, reducing flexibility on start dates rather than automatically raising every quote.
Use regional percentages as a comparison tool, not a guaranteed adjustment. Obtain at least two local estimates using the same measured area, product type, prep requirements, and number of faces.
How long washing and sealing usually take
A two-person crew may need 1-2 days of active work for a standard 150-foot fence, depending on the number of sides and surface detail. A basic wash and application can take less time than stripping an old finish or working around landscaping. A larger 300-foot fence may require 2-4 crew days if both faces need treatment.
Contractors typically need clean, dry wood before applying sealer. Washing may happen one day and application another, with drying time affected by sun, temperature, shade, and humidity. Most clear sealers require one coat, but some products or very absorbent boards call for a second. Confirm the product label’s coverage and drying instructions rather than assuming a second coat is included.
Labor rates can be quoted by the hour or included in a per-square-foot rate. When a contractor uses an hourly estimate, ask for the expected crew size and hours as well as the rate. This makes it easier to understand whether a higher total reflects more prep, slower detail work, or a larger treated area.
Active labor and calendar duration are different. A job that requires only a day of application may still span two or more days because the wood must dry after cleaning.
When repairs, stripping, or gate work raise the total
Rotten boards, loose rails, protruding nails, and damaged posts should be addressed before sealing. Replacing a simple fence picket may cost $10-$30 for labor and material, while a rail or post repair can run $50-$250 or more depending on digging, concrete, and access. A full section replacement is a separate carpentry expense and should be itemized apart from sealing.
Cleaning often costs $150-$700 for a typical residential project. Light dirt may fit within the base quote; heavy algae, gray weathering, or embedded grime can require a stronger wash and more labor. Pressure washing must be controlled to avoid roughening soft wood or forcing water into joints. Clarify whether chemical cleaner, rinsing, and protection for plants are included.
Removing an old stain, paint, or failed coating can cost $0.50-$2 per square foot beyond ordinary washing. Disposal is usually modest for wash debris, but hauling away removed boards may add $50-$200. Gates with tight pickets and hardware can take longer than open fence panels; expect roughly $25-$100 per gate for additional sealing labor, depending on size and detailing.
Ask the contractor to list repairs and coating removal separately from the sealing rate. That breakdown helps distinguish necessary preparation from optional improvements and prevents a low base price from obscuring the full job cost.
Three fence sizes show how the totals compare
The examples below use a middle-range professional rate of about $2 per square foot, plus typical preparation where noted. They assume a 6-foot wood fence, ordinary access, and no major structural repairs. Local quotes can differ, especially when the fence has detailed pickets or old coating.
| Example | Measured area | Estimated work | Approximate total |
|---|---|---|---|
| 100 ft, one side | 600 sq ft | Wash $200-$300; seal about $1,200; 5-8 crew hours | $1,350-$1,700 |
| 150 ft, both sides | 1,800 sq ft | Wash $300-$450; seal about $3,600; 10-16 crew hours | $3,800-$4,300 |
| 200 ft, both sides, intricate pickets | 2,400 sq ft | Wash $400-$600; seal $5,000-$6,000; 18-28 crew hours | $5,400-$6,600 |
These examples use a $2-per-square-foot midrange for the sealing portion, with an added allowance for washing and, in the last example, slower application. A contractor might calculate the same job differently by using a linear-foot rate, but the quote should still identify treated sides and total coverage area.
Check that every estimate defines the same fence length and surface area. A 150-foot, 6-foot fence has about 900 square feet on one face, not 1,800, unless both faces are included.
How to lower the sealing bill without skipping protection
Measure the fence and choose the treatment scope before requesting estimates. If only the visible side is to be sealed, state that clearly; if both sides are exposed to weather, compare the added price against the additional coverage. Avoid paying for hidden faces that are inaccessible or not part of the agreement, but do not assume a one-side application protects the other face equally.
Complete simple site preparation in advance when the contractor permits it. Moving planters, trimming branches away from the fence, and clearing access can reduce setup time. Do not pressure-wash, sand, or apply cleaner without confirming the contractor’s process, since improper prep can damage the wood or create extra corrective work.
Choose a sealer suited to the wood and exposure rather than selecting the most expensive product by default. A clear water-repellent sealer may cost less than a tinted stain, but it offers little color change and may require more frequent reapplication in strong sun. Ask for the product name, coverage rate, number of coats, and expected maintenance interval before comparing material prices.
Request written, itemized quotes from at least three contractors. Compare cleaning, repairs, product, number of coats, both-side coverage, and warranty terms. Scheduling during a contractor’s less-busy period may improve availability, but weather must still meet the product’s application requirements.
The safest savings usually come from clear scope and comparable bids, not from omitting essential cleaning or applying sealer to damp wood. A cheap quote that skips preparation can lead to uneven coverage and an earlier repeat expense.
Clear sealer, stain, and untreated wood have different upkeep costs
Clear sealer preserves the wood’s natural appearance and usually costs about $1-$3 per square foot installed. It does not provide the same color or UV protection as many pigmented stains. A transparent finish may need attention every 1-3 years in sunny or wet locations, although sheltered fences can last longer. Follow the product label and inspect the surface rather than relying on a fixed schedule.
Penetrating stain often costs about $1.50-$4 per square foot installed, depending on product, prep, and number of coats. Pigment can improve resistance to fading, but the finish changes the fence’s color. Painting may cost roughly $2-$5 per square foot when extensive prep is included; unlike penetrating products, paint can peel and may require scraping before recoating.
Leaving wood untreated avoids the immediate sealing charge, but it does not prevent weathering, checking, or moisture-related deterioration. Replacement of damaged boards or sections can cost much more than routine maintenance. For a 150-foot fence, a clear-sealing job of $1,800-$3,600 for both sides should be weighed against the maintenance interval, exposure, and the owner’s preference for natural wood appearance.
The lowest initial price is not always the lowest upkeep cost. Compare product life, appearance, and future preparation needs alongside the installed quote, especially when choosing between clear sealer and a pigmented finish.