The King County Decks

Windows Installation in King County.

More light, more comfort, more efficiency — for every home.

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    Professional Window Installation & Replacement in King County, WA

    King County homeowners trust King County Decks for expert window installation and replacement services. With over 23 years of home construction experience and hundreds of satisfied customers across Seattle, Bellevue, Tacoma, and Redmond, we deliver energy-efficient, beautifully installed windows that protect your home from Washington’s demanding climate — and lower your energy bills year-round.
    Free Window Installation Quote

    Why King County Homeowners Need Quality Window Installation

    Washington’s Pacific Northwest climate is tough on windows. Heavy rainfall, persistent grey skies, temperature swings, and coastal winds all accelerate wear on aging or poorly installed windows. 

    The result? Cold drafts, skyrocketing energy bills, moisture intrusion, and potential mold damage. Professionally installed, high-performance replacement windows make a measurable difference in your home’s comfort, efficiency, and value.

    Energy efficiency
     Better insulation means lower heating and cooling costs every single month. We offer ENERGY STAR® rated options to maximize your savings.

    Enhanced security
    Advanced locking mechanisms and durable frames protect your home against break-ins and give you real peace of mind.

    Noise reduction
    Quality glass and expert sealing techniques significantly reduce outside noise, turning your home into a true sanctuary.

    Curb appeal
    New windows instantly refresh your home’s exterior, boosting visual appeal and resale value at the same time.

    Window Installation Services We Offer in King County

    King County Decks installs all major window styles and materials. Whether you’re replacing a single drafty window or upgrading every window in your home, we have the expertise and product selection to match your needs and budget.

    Types of Windows We Install

    Double-hung windows : Classic and versatile — both sashes open for easy cleaning and excellent ventilation.

    Casement windows: Hinged on one side and opening outward — ideal for maximizing airflow and unobstructed views.

    Sliding windows: Space-saving and smooth-operating — great for wide openings and contemporary home styles.

    Bay & bow windows: Create a stunning focal point and extra interior space — perfect for living rooms and kitchens.

    Picture windows: Fixed-pane windows that frame your view like a work of art while maximizing natural light.

    Awning windows: Hinged at the top and opening outward — let fresh air in even during light rain, ideal for the Northwest.

    Our Window Installation Process

    We follow a careful, proven process on every project — protecting your property and ensuring a flawless installation from consultation through final walkthrough.
    01

    Free In-Home Consultation

    We assess your needs, take measurements, and walk you through all your options.
    02

    Custom Planning

    Our team prepares a tailored plan based on your style preferences, budget, and property requirements.
    03

    Window Selection & Material Guidance

    We help you choose the right style, material, and glass type for your home.
    04

    Professional Window Removal

    Old windows are carefully removed with full protection of your interior and exterior.
    05

    Precision Installation & Weatherproofing

    New windows are fitted, sealed, and tested using the latest tools and techniques.
    06

    Final Inspection & Walkthrough

    We walk through everything with you to ensure your complete satisfaction.
    FREE ESTIMATES
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    Why Choose King County Decks for Window Installation?

    King County Decks was founded by Max Kovalev and Sergey Kuyan — experienced builders with over 23 years of home construction expertise through their parent company, MJK Construction. Fully licensed and insured, we bring that same level of professionalism to every window project, no matter the scale.

    We specialize in making your home more energy efficient, functional, and beautiful. New windows play a big role in that — and we know how to do it right.

    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.

    Serving all of King County

    Whether you’re in Seattle, Bellevue, Tacoma, Redmond, or Mercer Island, our team is ready to help you upgrade your windows with expert installation and lasting results.

    Financing is available for qualifying projects.

    Our professional window installation teams proudly serve homeowners across King County and the Greater Seattle area. 

    We provide expert window replacement and installation services in Seattle, Bellevue, Tacoma, Redmond, Mercer Island, Kirkland, Renton, Issaquah, Kent, Auburn, and Sammamish. 

    Whether you’re upgrading a single window or planning a complete home renovation, our local experts deliver reliable craftsmanship, energy-efficient solutions, and exceptional customer service tailored to the unique needs of Washington homeowners.

    Frequently Asked Questions — Window Installation in King County

    How long does window installation take?

    Most standard window replacement projects are completed in a single day. Larger projects with 10+ windows may take two days. We provide a clear timeline during your free consultation.

    Do I need a permit for window replacement in King County?

    In most cases, direct replacement (same size opening) does not require a permit. Structural modifications or new window openings typically do. Our team handles all permit coordination when required.

    What is the best window material for the Pacific Northwest climate?

    Vinyl and fiberglass frames are the top choices for King County homes due to their excellent moisture resistance, minimal maintenance requirements, and strong thermal performance in wet, variable climates.

    How much does window installation cost in King County?

    Window installation costs vary based on window size, style, frame material, and glass package. Most homeowners invest between $400–$1,200 per window installed. Contact us for a free, accurate quote for your specific project.