Window Installation & Replacement in King County
More light, more comfort, more efficiency — for every home.
King County homeowners know how critical quality windows are in a region defined by grey skies, heavy rain, and fluctuating temperatures. Windows aren’t just about looks — they’re central to your home’s energy efficiency, security, and comfort. King County Decks brings 23+ years of craftsmanship to every window installation and replacement project.
Why quality windows matter in King County
Washington’s climate puts real demands on your windows. Poor-quality or aging windows let in cold drafts, drive up energy bills, and can allow moisture to seep into walls — leading to mold and structural damage over time. Professionally installed, high-performance windows make a meaningful difference year-round.
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 types we install
We work with a wide range of window styles and materials to suit every home design and every budget. Our team helps you choose the right option for your specific needs.
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 installation process
Every window project follows a careful, proven process that protects your property and ensures a flawless result from start to finish.
Free consultation
We assess your needs, take measurements, and walk you through all your options.
Window selection
We help you choose the right style, material, and glass type for your home.
Professional removal
Old windows are carefully removed with full protection of your interior and exterior.
Precision installation
New windows are fitted, sealed, and tested using the latest tools and techniques.
Final inspection
We walk through everything with you to ensure your complete satisfaction.
King County’s trusted window specialists
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.
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.
