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The Seattle Decking Company
Composite Decking Bellevue WA

Bellevue, WA · King County

Composite Decking Bellevue

Trex Transcend, TimberTech PRO, and AZEK installed on Bellevue's hillside lots, HOA communities, and Lake Washington waterfront properties. Only four-sided-capped boards — no uncapped composite on shaded Pacific Northwest decks. HOA submissions, PE engineering, and mybuildingpermit.com permitting handled in full.

Why Composite Is the Right Choice for Most Bellevue Lots

Bellevue's combination of heavy shade, HOA restrictions, and premium home values makes composite decking the dominant material choice for good reason. Cedar requires professional staining every 2–3 years — a cycle that runs $900–$3,000 per treatment and totals $12,000–$40,000 over 20 years on a Bellevue property. Capped composite eliminates that cycle entirely.

Shade is the critical variable. Newport Hills, Somerset, Eastgate, and North Bellevue lots with established Pacific Northwest tree canopy are exactly where uncapped or partially capped composite fails — moisture penetrates exposed wood fiber, triggering mold and staining within 5–8 years. We specify only four-sided-capped boards on every Bellevue project: TimberTech PRO Reserve, TimberTech Vintage Collection, or AZEK for the shadiest sites.

For West Bellevue and Clyde Hill HOA communities, composite is often architecturally required. We review your CC&Rs before material selection and prepare the full ARC submission package — color chips, elevation drawings, material specifications — as standard practice.

Composite Brands We Install

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Trex Transcend / Signature — Lifetime warranty, 40+ colors, most popular in King County
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TimberTech PRO Reserve — Four-sided capped — best for shaded Bellevue hillside lots
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TimberTech Vintage Collection — Wide planks, deep wood grain, premium look
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AZEK Harvest Collection — 100% PVC — zero organic content, maximum shade performance
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Fiberon Paramount — Four-sided capped, strong warranty, mid-premium price

Shade Rule

On any lot with more than 40% shade coverage — Newport Hills, North Bellevue, Somerset — we will not install single-side-capped or uncapped composite. It fails in under 10 years in King County shade. We specify four-sided-capped or PVC only.

Composite Deck Pricing in Bellevue

All-in installed costs for a standard 350–450 sq ft composite deck. Hillside engineering, HOA submissions, and waterfront builds priced separately.

Mid-Grade Capped

Trex Select, TimberTech Terrain

$38,000 – $55,000

25-year fade & stain

Solid performer for sun-exposed or semi-shaded lots

Premium Composite

Trex Transcend, TimberTech Vintage

$50,000 – $72,000

Lifetime fade & stain

Our most common Bellevue specification — wide color range, premium grain

PVC / Fully Capped

AZEK, TimberTech PRO Reserve

$55,000 – $80,000

Lifetime, transferable

Required for fully shaded lots — zero organic content on any surface

Hillside builds (Newport Hills, Somerset) requiring PE engineering: add $8,000–$18,000. Waterfront/glass railing builds: quoted separately. All prices include permit, framing, decking, railing, and final inspection.

Composite Decking in Bellevue — Common Questions

What composite decking brands do you install in Bellevue?+
We install Trex Transcend and Signature, TimberTech PRO and Legacy, AZEK Harvest Collection, and Fiberon Paramount. For Bellevue's shade-heavy lots in Newport Hills and Somerset, we specify only four-sided-capped boards — TimberTech PRO or AZEK — because fully capped composites have zero exposed organic fiber and won't support moss or mold growth regardless of shade. West Bellevue and Clyde Hill HOAs commonly require specific color palettes; we review CC&Rs before material selection.
How does composite decking perform on Bellevue hillside lots?+
Composite performs exceptionally on Bellevue's Newport Hills, Eastgate, and Somerset hillside lots. Key considerations: elevated builds require pressure-treated or aluminum framing (we use aluminum on decks over 36" above grade for longevity), hidden fasteners are required on composite at this price point, and shade from mature Pacific Northwest trees demands capped boards. TimberTech PRO Reserve or AZEK is our specification for any shaded hillside elevation in Bellevue.
Will my Bellevue HOA approve composite decking?+
Most Bellevue HOAs and planned communities with CC&Rs approve composite decking — in fact many require it (no cedar, no pressure-treated exposed surfaces). West Bellevue and Clyde Hill communities frequently specify earth-tone color palettes. We pull your title report, review the CC&Rs before material selection, and prepare the full Architectural Review Committee submission package including material samples, color chips, and elevation drawings. We track the committee timeline so your permit submission is synchronized with HOA approval.
How much does composite decking cost in Bellevue?+
Bellevue composite deck pricing: Mid-grade capped composite (Trex Select, TimberTech Terrain) on a standard 350–450 sq ft deck runs $38,000–$55,000 installed. Premium composite (Trex Transcend, TimberTech Vintage) runs $50,000–$72,000. PVC (AZEK, TimberTech PRO) runs $55,000–$80,000. Hillside builds in Newport Hills or Somerset requiring engineered footings and structural drawings add $8,000–$18,000 to any tier. Waterfront Meydenbauer-area builds with full glass railing and electrical integration: $85,000–$140,000+. These are all-in installed costs including permit, framing, decking, railing, and inspection.
Do I need a permit for a composite deck in Bellevue?+
Yes. City of Bellevue requires a building permit for any attached deck or detached deck over 200 sq ft. Permits are submitted through mybuildingpermit.com. Standard review: 3–6 weeks. Hillside builds over 30" above grade require stamped PE structural drawings — add 1–3 weeks and $1,200–$2,500 for engineering. HOA communities in West Bellevue and Clyde Hill require Architectural Review approval before permit submission, adding 3–5 weeks. We manage the full permitting and HOA coordination.
How long does composite decking last in Bellevue's climate?+
Premium capped composite (Trex Transcend, TimberTech Vintage, AZEK) carries a lifetime fade and stain warranty and physically lasts 35–50 years in King County's climate. Mid-grade capped composite carries a 25-year warranty. The board surface outlasts the structural framing in nearly every case — when we replace a composite deck in Bellevue, it's because the framing has rotted under a deck that was built on pressure-treated wood in the late 1990s or 2000s, not because the composite failed. Aluminum framing with composite decking essentially eliminates that failure mode.

Ready to Start Your Bellevue Composite Deck?

Free on-site estimate. We review your HOA requirements, site conditions, and permitting timeline before you commit to anything.