FREE ON-SITE DESIGN CONSULTATIONS
Seattle's Trusted
Deck Installation
New deck installation in Seattle starts with the site, foundations and a complete structural plan. Compare engineered footings, SDCI permit requirements, decking and railings in one written scope. New decks start at $18 per sq ft in wood and $28 in composite; your written estimate sets the price for your property.
Free phone consultation · No obligation · 58 Seattle neighborhoods
Call to discuss your deck project.
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Contractor
Deck construction, repairs & replacementDECK INSTALLATION PRICES
Deck Installation Cost
in Seattle, per Square Foot
New decks in Seattle start at $18 per square foot in wood and $28 in composite. Tell us the size you picture and we will put a real number in writing at the free on-site estimate.
Starting prices for Seattle projects. Your exact price is set in writing at the free on-site estimate.
01 / WOOD OR CEDAR DECK
From $18 per sq ft
Pressure-treated or Western Red Cedar, built on new footings.
02 / COMPOSITE DECK
From $28 per sq ft
Trex, TimberTech and other composite boards with little upkeep.
03 / RAILING
From $20 per linear ft
Wood, composite, metal, cable or glass railing.
04 / STAIRS
From $31 per step
Stairs down to the yard, patio or garden.
Up to 25% off your deck project.
Free on-site estimate, no obligation.
WHAT WE COVER
Deck Installation Services
Across Seattle
We define all six parts of the Seattle deck installation scope before work begins. Your written estimate spells out the included work, and your workmanship warranty terms are written into your agreement.
We spell out the project scope in a written estimate before work starts, and your warranty terms are written into your agreement.
01 / DECK INSTALLATION
Site Assessment & SDCI Permits
Assess soil bearing, slope, drainage, access and the relationship between deck and house. A permit-ready plan may need structural drawings and site information. Permit filing and city approval are separate steps, and we build both into your project schedule. Confirm the actual scope with Seattle SDCI Tip 312. The city identifies decks more than 18 inches above ground and roof decks as permit triggers; environmentally critical areas can add requirements. Do not count on a blanket 30-inch permit exemption. Current fees, review time and required drawings must be checked for the application.
02 / DECK INSTALLATION
Engineered Footings
Have the foundation designed for the loads and site. Concrete piers and helical piles are options to evaluate where suitable, especially for saturated or hillside conditions. Footing depth is not one-size-fits-all; dimensions, bearing and placement must follow the approved design.
03 / DECK INSTALLATION
Framing & Ledger Attachment
Specify pressure-treated framing with the treatment category suited to exposure, plus compatible joist tape, flashing and connectors. Ground-contact-rated lumber is required where the actual use demands it, rather than because every framing member is identical. Specify ledger attachment separately from lateral-load connections. Simpson Strong-Tie DTT2Z is a tension-tie option for a designed lateral-load connection, not a universal substitute for the ledger fasteners or an automatically strongest system.
04 / DECK INSTALLATION
Decking & Hidden Fasteners
Compare Trex, TimberTech AZEK, Fiberon composite, Western Red Cedar and IPE hardwood by exact product. Hidden fasteners can provide a clean surface where approved; perimeter boards and stairs may need different details. Confirm joist spacing, board gaps and fastener compatibility before installation.
05 / DECK INSTALLATION
Railings & Stairs
Plan cable railing, glass balustrades or composite balusters together with stairs and structural attachments. Seattle’s residential guidance calls for guards above the applicable 30-inch fall-height trigger and at least 36-inch guards where required. A 42-inch specification can apply under other project/code conditions; elevation alone does not establish one universal rule.
06 / DECK INSTALLATION
Finishing & LED Deck Lighting
For cedar or hardwood, choose an approved stain or sealer and preparation method for the exposure. Evaluate waterfront or marine-use claims by the actual coating instructions. Coordinate optional LED riser/post-cap lighting, electrical work and planter integration, then prepare the completed assembly for required SDCI inspections.
Not sure exactly what you need?
Start with a site assessment and ask what is included in a free inspection before scheduling.
PLAN YOUR OUTDOOR SPACE
Ask about a free inspection and schedule a time that works for you.
SIGNS YOU’RE READY
Is Your Home Ready
for a New Deck?
A new deck can create a place for dining, entertaining or everyday outdoor living. These seven situations help define what to bring to a Seattle deck installation consultation.
Deck materials and construction details to consider for your project.
01
Your home has no deck and you want outdoor living space
Start with the door location, available yard, circulation and how you want to use the space. Include stairs, privacy and usable furniture clearances in the design.
02
Old deck has been torn down and you need a fresh build
A cleared site still needs a foundation and permit review. Record the former deck footprint, remaining supports, access and any demolition work still required.
03
Want to add a multi-level or rooftop deck design
Multiple levels and rooftop decks bring specific loading, drainage, access and approval questions. Establish the structural and roof constraints before choosing finishes.
04
Need a deck for entertaining, dining, or hot tub install
Dining furniture, gatherings and a filled hot tub create different planning needs. A hot tub requires a specific structural load assessment; ordinary deck framing should not be assumed suitable.
05
Selling soon and want to add value before listing
Discuss the scope with your project and real-estate advisers. A replacement or addition can change how buyers use the home, but no fixed resale gain is promised.
06
Want a deck that survives PNW weather for 25+ years
Treat a 25-plus-year target as a planning goal, not a blanket lifespan. Product selection, detailing, exposure and maintenance all affect long-term performance.
07
Looking to upgrade to composite, Trex, or premium hardwood
Compare Trex and other composite collections with cedar and IPE hardwood. Include board color, railing compatibility, fastening, maintenance and the written warranty.
Discuss your deck installation options.
Describe the property, existing deck and preferred timeline. We’ll confirm a visit time that works for you.
7 DECK INSTALLATION DECK INSPIRATIONS
New Deck Ideas
for Seattle Homes
Explore seven deck project ideas, from material choices to structural repair and finishing details. Use this design inspiration to compare materials, structural repair options and finishing details for your deck.
Magnolia · DESIGN INSPIRATION
Cedar Deck Installation
Cedar deck restoration ideas: surface preparation and a refreshed wood finish.
Ballard · DESIGN INSPIRATION
Composite Deck Installation
Trex Transcend deck ideas with hidden fasteners and LED lighting.
Queen Anne · DESIGN INSPIRATION
Multi-level Deck Installation
IPE hardwood deck ideas with cable rail and engineered footing considerations for a hillside.
Capitol Hill · DESIGN INSPIRATION
Rooftop Deck Installation
Rooftop deck ideas with pedestal pavers and a bench positioned for the view.
Madison Park · DESIGN INSPIRATION
Hardwood Deck Installation
Brazilian IPE hardwood deck ideas for waterfront outdoor space.
Fremont · DESIGN INSPIRATION
Premium Deck Installation
TimberTech Premier deck ideas with integrated seating.
West Seattle · DESIGN INSPIRATION
Cedar Restoration
Cedar refinishing ideas with board replacement and railing repair.
DECK INSTALLATION TIMELINE
Seattle Deck Installation Timeline:
From First Call to Finished Deck
Consultation. Inspection. Written quote. Project completion. Keep the deck scope, proposed solution and agreed price connected at every stage.
01
Day 1: Call or Send the Form
Start with four or five details: Seattle ZIP, approximate deck size, existing conditions, material ideas and timeline. Describe the deck installation goal and ask who will answer project questions. Tell us what you want to change and ask about the next inspection or planning step.
02
Within Days: Free On-Site Estimate
Arrange the property assessment and mention urgent safety conditions.
03
Your Written Price and Start Date
Compare the defined work, materials, labor, permits and exclusions in a fixed written quote before deciding. We start with a free, no-obligation phone consultation, look at the deck on site and put the scope in a written estimate before work starts.
04
Build Time: Most Decks Take 1–3 Weeks
Agree on the crew, start date, milestones, changes and cleanup for your deck installation project. Review progress and the written warranty at handover.
Bring photos of the whole deck, the affected area and the underside only if safely accessible. Include previous repair history and any known permit information.
Start with a call.
Start with the issue you can see. Ask for a Seattle deck installation consultation and a scope based on your actual property.
SEATTLE PERMITS
Do You Need a Permit
to Build a Deck in Seattle?
Most new decks in Seattle need a permit, and most need only the quick subject-to-field-inspection permit. Seattle’s building department (SDCI) requires a permit in these three cases, and we tell you at the free estimate which one applies to your deck.
Source: Seattle SDCI deck requirements.
01 / HEIGHT
More than 18 inches above the ground
Measured from the ground to the deck. Lower decks do not need a permit unless one of the next two cases applies.
02 / ROOF DECKS
Built on top of part of the building
Every roof deck needs a permit, and it goes through the full addition or alteration permit.
03 / CRITICAL AREAS
In an environmentally critical area
Such as landslide-prone or flood-prone ground. The city visits the site before any permit application.
04 / MOST DECKS
A quick field-inspection permit
Most Seattle decks need only a subject-to-field-inspection permit. The full addition or alteration permit applies above 8 feet, with beams 14 feet or longer, solid decking or more than 750 square feet.
We check the permit at your estimate.
If your project needs one, it goes into your written scope.
8 REASONS TO CHOOSE A SEATTLE DECK REPAIR CONTRACTOR
Why Hire Us
for Deck Installation in Seattle
Experience, documented credentials, local conditions, a clear quote and a written warranty all help you evaluate a Seattle deck installation company. Ask how each applies to your property and request the supporting documents.
01
Washington Registration & Insurance
We are a registered Washington contractor (#DBSTTLE287G8) and carry $1 million in general liability insurance, with a certificate available for your deck installation. You get a written estimate before work starts.
02
Seattle Deck Installation Experience
Ask for relevant completed projects, material experience and structural scope.
03
Pacific Northwest Climate Knowledge
Relate moisture protection, drainage, shade, corrosion and weather exposure to the actual property and assembly.
04
Workmanship Warranty in Writing
Our workmanship warranty is in writing, and your warranty terms are written into your agreement before work starts. A manufacturer’s product warranty and our workmanship warranty cover different things; we review both with you.
05
Local Seattle Coverage
We serve all 58 Seattle neighborhoods.
06
Straightforward Phone Quotes
Discuss the scope and options before committing. Confirm consultation terms and ask for clear written pricing without on-site sales pressure.
07
Safety Response
Describe unstable components or another urgent hazard when requesting an assessment.
08
Specified Stainless or Coated Fasteners
Confirm compatible hardware for lumber treatment, connector and exposure, and identify whether it is included in the quote rather than an extra.
Speak with your deck installation project contact.
Tell us what is happening with your deck and ask about inspection options for your Seattle address.
SEATTLE DECK REPAIR REVIEWS
What 269+ Homeowners
Say About the Work
Deck service reviews can help you compare the inspection, written price, communication and finished work.
Deck replacement · Kirkland
Very happy with how it turned out.
Tara describes replacing a deteriorated deck in Kirkland. She appreciates David’s direct explanation of the work, the stable finished deck, the team’s progress through rain and the clean site left afterward.
When comparing reviews, look for: Inspection response, diagnosis, fixed repair price and the completed work.
Deck addition · North Bend
The materials feel solid, and the finish is clean.
Crystal describes a deck addition in North Bend. She praises David’s explanation of layout choices, a stair adjustment that suited the yard, the finished materials and the crew’s thorough cleanup.
When comparing reviews, look for: Comparing deck installation quotes, the written scope and whether options were explained without upselling.
Deck addition · Bellevue
What we appreciated most was the lack of drama.
Dylan describes adding a deck to his Bellevue home. He highlights David’s clear timeline, adjustments during rain, clean finish work and a crew that showed up, completed the work and cleaned afterward.
When comparing reviews, look for: Arrival communication, care around the home, cleanup and how the repair performs over time.
PACIFIC NORTHWEST DECK INSTALLATION
Built for Seattle
Rain, Moss and Salt Air
Rain, evergreen shade, seasonal freeze–thaw conditions and Puget Sound salt exposure all belong in a Seattle deck installation assessment. Moss and slow drying can hide moisture problems around board ends and structural connections.
For shaded or north-facing decks in Fremont and Ravenna, inspect moisture retention and ventilation. Waterfront properties around Magnolia and Alki may need additional attention to corrosion. Sloped or elevated sites in Queen Anne and Capitol Hill call for a close review of supports and access. We confirm the actual conditions at each address.
- Compatible stainless or coated fasteners. Select for the lumber treatment, connector and exposure.
- Appropriately treated framing. Use ground-contact-rated material where the assembly and exposure require it.
- Joist and ledger moisture protection. Detail flashing, drainage and protection tape as part of the repair.
- Finishes suited to the site. Confirm any marine-grade or waterfront coating against the product’s approved uses.
Read the background on deck construction and repair and the Seattle SDCI deck requirements.
Plan for repeated Seattle rain, shade and drying conditions at the actual property. Specify corrosion-compatible stainless or coated fasteners as part of the complete lumber, connector and exposure design.
12 SEATTLE DECK INSTALLATION FAQS
Seattle Deck Installation
Questions, Answered
Review costs, timing, scope, permits, materials, credentials and warranty terms for your project.
Talk to a real builder
Call with the deck size, materials, location and timeline.
BBB Accredited Business. Free phone consultation, no obligation.
Deck installation in Seattle starts at $18 per square foot for wood or cedar and $28 per square foot for composite. Railing starts at $20 per linear foot and stairs at $31 per step, with up to 25% off qualifying projects. Your exact price comes from the free on-site estimate.
We price Seattle deck installation around the area, height, foundations, access, material, rails and engineering. For a 300 sq ft / roughly 28 sq m deck, we can compare cedar, Trex Transcend and IPE with the same footprint and structural assumptions. A multi-level layout adds stairs, connections and access work that need their own allowances.
Your written Seattle deck installation estimate should identify the board collection, railing, foundations, labor and permit responsibilities. Let’s work through those choices together so you can compare complete scopes.
Decks more than 36 inches above the ground count toward your lot coverage, which is capped at 50 percent of the lot in neighborhood residential zones. Decks over 750 square feet need a full addition or alteration permit. We check your lot at the estimate.
Yes. The on-site estimate is free and comes with no obligation. You get a written price and decide on your own time.
Tell us the size of the deck and what you see, and send photos if you have them. That is enough to talk through the likely scope on the phone. The exact number comes from the free visit, because rot, footings and framing hide under the boards.
If your project needs a Seattle permit, we tell you at the estimate and include it in your written scope. Most decks need only a subject-to-field-inspection permit from Seattle SDCI.
We can discuss separate dates for design, permitting, material ordering and construction. A 300 sq ft installation, multi-level deck and hillside build need different work sequences. Let’s establish the site-work duration after reviewing access, engineering and the material order, with permit review allowed for separately.
Site conditions, engineering, permit comments, inspection availability, weather and deliveries determine a project-specific schedule.
Ask the quote to identify six categories: materials, labor, SDCI permit work, structural engineering when required, joist tape and specified Simpson Strong-Tie hardware. Also clarify access, disposal, lighting and the final railing specification.
If an old deck remains, we can price demolition, disposal and site clearing as separate parts of your installation estimate. Tell us about access and any surfaces or landscaping that need protection.
Confirm the actual scope with Seattle SDCI Tip 312. Seattle identifies decks more than 18 inches above ground and roof decks as permit triggers; environmentally critical areas can add requirements. We can discuss the applicable drawings, review and inspections for your property.
Permit fees depend on the actual application. Agree with us who prepares drawings, submits the application, responds to corrections and schedules inspections, with those responsibilities recorded in your scope.
Compare Trex Transcend composite, TimberTech AZEK PVC, Western Red Cedar and IPE hardwood by exposure, appearance, care and exact product warranty. Waterfront and roof-deck assemblies also need appropriate drainage and fastening.
We can compare cedar, Trex and IPE for Seattle rain exposure, appearance and care. Check the selected collection’s current warranty, wood-finishing instructions and structural requirements with us; the care plan should fit your actual deck.
For a hillside deck in Queen Anne, Magnolia, West Seattle or Mount Baker, we can discuss structural and geotechnical review, concrete piers or helical piles, access and steep-slope restrictions. The actual parcel determines which of those details your design needs.
Share the address, intended height and access photos so the design team can identify the required investigation. Do not choose a pile type or footing depth based only on the neighborhood.
Financing options are available for your deck project; ask about them during your free phone consultation. If you plan to finance your project, get your lender’s written terms before you commit.
Ask for the cash project price and the complete financing terms separately.
Ask for written coverage of framing, ledger attachment, footing connections, railings and stairs, together with exclusions, claim steps and any transfer rights on sale. Talk with us about the workmanship coverage for your project. Only the contractor’s written warranty establishes the duration and coverage.
We can review Trex, TimberTech and IPE material coverage separately from workmanship coverage. Match the exact product, collection, purchase date and installation requirements to the manufacturer’s current warranty, then confirm the contractor’s written terms for the agreed work.
58 NEIGHBORHOODS · 7 DISTRICTS
A Deck Builder Near You,
Anywhere in Seattle
Explore all 58 Seattle neighborhoods across seven districts, with Seattle ZIP context from 98101 to 98199. Select your neighborhood for deck construction, repair, materials and property considerations. For nearby Bellevue or Kirkland, share your project address so we can check the applicable city or King County permit requirements.
Downtown Seattle 1
Capitol Hill & Central Seattle 12
North-Central Seattle 18
Northwest Seattle / Ballard 6
Queen Anne & Magnolia 4
West Seattle 11
Don't see your area?
Share the exact address and deck concern when asking about project availability.
READY TO START?
Get Your Free
Seattle Deck Installation Estimate
Discuss what your deck installation needs, the likely scope and cost, and when work could start. Begin with the property and project goals, then request a clear written proposal.
Free phone consultation · No obligation