The King County Decks

Custom Pergola Installation in King County

Custom pergola design & installation in King County, WA. Attached, freestanding & louvered pergolas built for the Pacific Northwest.

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    Custom Pergola Installation in King County, WA

    A pergola does something no other outdoor structure quite manages — it transforms an open deck or patio into a defined outdoor room without enclosing it. It creates shade without darkness. Structure without walls. A sense of destination that makes you actually use your outdoor space rather than simply have it.

    King County Decks designs and builds custom pergolas throughout King County, WA — attached to homes, freestanding over patios, integrated into new deck builds, and added to existing structures. With 23+ years of construction experience and a background in full custom home building, we bring architectural precision and finish-quality craftsmanship to every pergola we install.

    Free Pergola Installation Quote →
    Custom Pergola Installation

    Why a Pergola Is One of the Best Investments for a King County Outdoor Space

    Pacific Northwest weather changes quickly — sun, clouds, and rain often in the same day. A pergola helps create a more comfortable, usable outdoor space through every season.

    Creates a True Outdoor Room — Adds comfort, structure, and a welcoming gathering space.

    Provides Light Shade & Airflow — Reduces harsh sun while keeping the space open and breezy.

    Extends Outdoor Living Season — Makes decks more usable during Pacific Northwest weather.

    Supports Outdoor Features — Perfect for lighting, fans, plants, canopies, and heaters.

    Types of Pergolas We Design & Install in King County

    Pergola Styles We Build

    Attached Pergolas — Seamlessly extend your indoor living space outdoors.

    Freestanding Pergolas — Flexible placement anywhere in your yard.

    Deck-Integrated Pergolas — Built directly into new deck structures.

    Louvered Pergolas — Adjustable shade and rain protection for all-season comfort.

    Pergola Additions — Add overhead coverage to an existing deck.

    Pergola Materials We Offer

    Western Red Cedar — Natural Pacific Northwest beauty and durability.

    Pressure-Treated Lumber — Strong, affordable, and reliable.

    Redwood — Premium appearance with excellent longevity.

    Aluminum & Composite — Modern, low-maintenance outdoor solutions.

    Our Custom Pergola Installation Process

    Every pergola we design is tailored to match the architecture of your home, the purpose of your outdoor space, and your personal taste. Whether you want to define a grilling area, create a romantic sitting space, or add dimension to a sprawling upper deck, we design with purpose and build with precision.
    FREE ESTIMATES
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    01

    Consultation & Design

    We assess your space, discuss your goals, and review pergola styles and material options.
    02

    Custom Planning & Estimate

    We create a tailored pergola design and provide a detailed, transparent estimate.
    03

    Permits & Preparation

    We handle permits, inspections, footing layout, and site preparation for a smooth build.
    04

    Structural Installation

    Posts, beams, and rafters are installed with precision for strength, stability, and visual appeal.
    05

    Features & Finishing

    Lighting, privacy panels, canopies, and custom details are added and professionally finished.
    06

    Final Inspection & Walkthrough

    After final inspection approval, we review the completed pergola with you to ensure everything meets expectations.

    Why Homeowners Choose King County Decks for Pergola Installation

    With over 23 years of experience in construction and outdoor living spaces, our team brings design expertise and hands-on craftsmanship to every pergola project — from simple shade structures to complex, fully integrated pergolas atop decks with pools, stairs, and jacuzzies.

    We proudly serve Bellevue, Seattle, Tacoma, Kirkland, Redmond, Mercer Island, and surrounding areas, offering homeowners the ability to turn their backyards into personal retreats.

    23+ Years of Experience

    Founded by experienced builders with decades of residential construction expertise across countless successful projects.

    Fully Licensed & Insured

    Fully licensed, bonded, and insured throughout Washington State for complete homeowner confidence on every project.

    ENERGY STAR® Certified Options

    We provide ENERGY STAR® certified windows helping homeowners reduce monthly energy costs and maximize long-term savings.

    Local King County Experts

    Local King County specialists familiar with regional permits, building codes, and seasonal weather-related construction requirements.

    Areas We Serve — Pergola Installation Across King County

    Our pergola installation teams serve homeowners throughout King County and the greater Seattle metro area, including:

    Seattle · Bellevue · Tacoma · Redmond · Kirkland · Mercer Island · Renton · Issaquah · Sammamish · Kent · Auburn · Federal Way · Burien · Shoreline · Bothell · Newcastle · Maple Valley · Woodinville

    Pergola Installation

    Frequently Asked Questions — Pergola Installation in King County

    Do I need a permit to build a pergola in King County?
    In most King County jurisdictions, attached pergolas require a building permit. Freestanding pergolas may or may not require permits depending on their size and placement. Requirements vary by city — Seattle, Bellevue, Kirkland, and other incorporated cities each have their own thresholds. We determine what's required for your specific project and handle the full permitting process.
    How long does pergola installation take?
    Most standard pergola installations are completed in 3–6 business days. Larger structures with significant feature integration (louvered systems, extensive lighting, electrical) may take 7–10 days. Permit review timelines vary by jurisdiction and are the most variable factor in overall project scheduling.
    What is the best pergola material for King County's wet climate?
    Western red cedar is the most popular and widely recommended natural wood option for King County — its natural oils provide inherent moisture resistance, and it performs well through the region's extended rainy season. For homeowners who want near-zero maintenance in a wet climate, powder-coated aluminum — particularly in a louvered pergola system — is the most durable, lowest-maintenance option available.
    How much does a pergola cost in King County, WA?
    Installed pergola costs in King County typically range from $6,000 for a basic attached cedar structure to $40,000+ for a large motorized louvered system with full feature integration. Size, material, configuration, and add-ons are the primary cost drivers. Contact us for an accurate, no-obligation quote for your specific project.