A TimberTech deck’s cost includes more than the surface boards. Framing, footings, installation, railings, stairs, and removal of an existing deck can all affect the final price.
For an accurate price, explore our deck installation services in Seattle and request an itemized estimate based on your property, selected TimberTech collection, and construction scope.
TimberTech Deck Cost by Size
HomeGuide’s TimberTech cost guide, dated July 2024, reports a national installed-cost range of $40–$70 per square foot. The examples below apply that range to several deck sizes. They are illustrative planning figures, not current Seattle quotes.
| Deck size | Surface area | Illustrative installed budget |
|---|---|---|
| 12×12 feet | 144 sq. ft. | $5,760–$10,080 |
| 12×16 feet | 192 sq. ft. | $7,680–$13,440 |
| 16×20 feet | 320 sq. ft. | $12,800–$22,400 |
| 20×20 feet | 400 sq. ft. | $16,000–$28,000 |
These calculations apply the national $40–$70 benchmark to each deck’s area. They do not establish what a particular Seattle project will cost. Premium collections, elevated construction, extensive stairs, difficult access, and structural repairs can increase the budget.
TimberTech Board Prices vs. Complete Installed Cost
A decking-board price covers the walking surface, not the complete deck. It excludes items such as framing, footings, railings, stairs, installation, and demolition unless the quote explicitly includes them.
TimberTech’s 2026 material-cost guide gives a general composite-board benchmark of $1.75–$8 per linear foot. This is a broad material reference, not a price list for every TimberTech collection or a complete installed-cost estimate.
| Price type | What it covers |
|---|---|
| Boards only | The selected decking boards |
| Material package | Boards plus the framing, fasteners, railings, and other materials specified in the quote |
| Installed project | The materials and construction work explicitly included in the contractor’s proposal |
Still comparing brands? Our TimberTech vs. Trex comparison explains how specific collections differ in construction, appearance, and features.
How TimberTech Collections Affect Your Budget
TimberTech offers two different decking materials: wood-plastic composite and Advanced PVC. They differ in construction, appearance, available dimensions, and price.
| Material | Example collections | Construction |
|---|---|---|
| Wood-plastic composite | Prime, Prime+, and Legacy | A blend of polymers and reclaimed wood fibers, protected by a polymer cap |
| Advanced PVC | Vintage, Landmark, and Harvest | Polymer decking containing no wood fibers |
Use our TimberTech decking colors guide to narrow down the collections and finishes you want priced before requesting supplier or contractor quotes.
Request pricing for the specific collection and color you want. A general TimberTech price range cannot account for every product, profile, and local supplier.
Board Dimensions and Pricing Units
Board dimensions vary by collection. For example, standard-width Vintage boards measure 5.5 inches wide × 1 inch thick, while Legacy deck boards measure 5.36 inches wide × 0.94 inches thick. Available lengths also depend on the profile.
Check whether a supplier’s price is per board, per linear foot, or per square foot. To estimate boards-only cost per square foot, divide the linear-foot price by the board’s actual width in feet. Allow separately for cuts and waste.
Beyond the Boards: Other Cost Drivers
Knowing how much TimberTech boards cost is just the start. Many other factors determine the final cost of your installation, including the following:
Deck Size
Larger decks generally require more decking, framing, and installation time when the design and specifications are comparable. However, square footage alone does not determine the price. A smaller elevated deck with extensive stairs and railings can cost more than a larger, simpler deck close to the ground.
Design
Your deck’s design determines the complexity of the work, which translates into the required hours and professional services. For example, decks with plumbing—perhaps those with outdoor kitchens or baths—may require the services of a licensed plumber and more labor hours than are necessary for a plain terrace.
Furthermore, your aesthetic choices affect expenses for materials and, to a lesser extent, labor. Before finalizing your layout, explore these deck remodeling ideas and decide which features belong in your initial construction budget.
Labor and Professional Services
Installation costs depend on the construction work involved. Replacing surface boards on suitable existing framing is a different project from building new footings, framing an elevated deck, or constructing stairs.
Ask for a project estimate covering the specified work rather than using an individual worker’s hourly wage to predict the total. A contractor’s price also accounts for supervision, equipment, insurance, and business overhead.
Design or engineering services may be necessary depending on the structure, site conditions, and permit requirements. Ask which professional services are included and which would be billed separately.
Our guide to choosing a TimberTech deck contractor covers the qualifications, project examples, and written documentation to review before hiring.
Seattle Deck Permits
Seattle generally requires a construction permit for decks more than 18 inches above the ground, roof decks, and decks in environmentally critical areas. Requirements depend on the property and design, so confirm the applicable rules with the Seattle Department of Construction and Inspections before work begins.
Some projects may qualify for a Subject-to-Field-Inspection permit, but that permit type does not apply to every deck. Permit fees and any required design or engineering work should be identified separately in your estimate.
Properties outside Seattle follow their own city or county requirements.
Site Preparation
Preparing the site for construction means clearing and leveling the ground, digging the foundations, and possibly demolishing an existing deck. As you can imagine, this is best done by a team of skilled workers, incurring labor costs that depend on the difficulty of the work.
Budgeting Tips For Your TimberTech Deck Project
It’s easy to see how a TimberTech deck installation can be an expensive endeavor that can easily skyrocket cost-wise. Your deck-building expenses don’t have to go beyond what you can and are willing to spend.
Here are a few tips to ensure it gets an adequate and manageable budget:
- Understand your requirements. Have a clear idea of what your deck is for and how it should look. Your design choices should help you develop an accurate estimate that accounts for material and labor costs, among other factors.
- Source locally. Getting a TimberTech product supplier in Seattle or the surrounding Puget Sound area is a smart move. Local suppliers can deliver quickly and may provide more personalized service.
- Get a contractor. Working with a contractor is often the best choice for a project as complex as a TimberTech outdoor deck. These companies have the experience and workforce needed to get the job done within a set budget and timeframe.
- Get multiple quotes. It pays to ask for quotes from different suppliers or contractors. This lets you compare pricing and service quality, ensuring you get the best value for your project.
- Ask about warranties. Before you settle with a contractor or a supplier, be sure to inquire for warranties on material and labor. You need to ensure you’re not the one footing the bill in case something goes wrong.
TimberTech Deck Cost FAQs
How much does a 20×20 TimberTech deck cost in Seattle?
A 20×20-foot deck covers 400 square feet. Your installed price depends on the selected TimberTech collection, framing, deck height, railings, stairs, and site access. Use the national benchmark above as an initial reference, then request an itemized Seattle estimate for your project.
Can I save money by keeping my existing deck frame?
Possibly. Reusing suitable framing can reduce demolition and construction work, but the frame must be inspected first. Its condition, connections, and joist spacing need to support the selected TimberTech boards and installation requirements. Surface replacement and a complete rebuild should be quoted as different scopes of work.
What should a TimberTech deck estimate include?
Ask for the collection and color, deck dimensions, framing and footings, fasteners, fascia, railings, stairs, and installation labor. The estimate should also identify demolition, disposal, delivery, taxes, permit fees, and any design or engineering services, stating which items are included or excluded.
Get a TimberTech Deck Estimate for Your Seattle Home
The most useful TimberTech deck budget starts with a defined scope: your chosen collection, deck dimensions, framing requirements, railings, stairs, and site conditions.
Planning a TimberTech deck? Explore our deck installation and remodeling services or call 206-851-4233 to discuss your project.
