To those of you googling where is Mercer Island Washington and those wondering what county is Mercer island in: we have all the proper answers! Mercer Island Washington is not just an island but also a vibrant city in King County.

Sitting right in the southern part of Lake Washington, Mercer Island offers stunning views and a unique community vibe that’s hard to beat. It’s the perfect mix of natural charm and modern living if you are thinking of building your custom home here.

Known as one of the top 50 suburbs in the U.S., Mercer Island boasts over 475 acres of parks, open spaces, and three public beaches. With more than 50 miles of hiking trails and a close-knit community, Mercer Island Washington is an exceptional place to create your dream home.

Nestled in the heart of Lake Washington, Mercer Island is a haven for those seeking the perfect blend of luxurious waterfront living and urban convenience, with easy bridge access to both Seattle and Bellevue. Renowned for its breathtaking views, vibrant community, and excellent schools, this idyllic island in King County offers a lifestyle few can resist.

a beautiful photo taken on Mercer Island Washington; Mercer Island is in King County and offers a lot of great opportunities for those who want to build a custom home on Mercer Island

Whether you’re enjoying a glass of wine at Barrels Wine Bar, taking in the spectacular Seafair views (arguably the best vantage point in the area), or cheering on local athletes at one of the island’s award-winning schools, Mercer Island Washington caters to a life well-lived. And with its proximity to Seattle, residents have access to the city’s dynamics without sacrificing tranquility—a balance that’s increasingly hard to find.

If you’re fortunate enough to call this exquisite island home—especially a waterfront property—you’ve landed a true gem. But with such a unique setting comes the need for thoughtful design to truly make the most of your home. Here are some home design tips to help you maximize your Mercer Island Washington waterfront living experience.

1. Maximize the View on Mercer Island Washington

The star of any Mercer Island waterfront property is, without a doubt, the view. Whether you’re looking out at the shimmering lake, the Seattle skyline, or Mount Rainier in the distance, your design should celebrate these natural wonders. Consider floor-to-ceiling windows to frame the scenery and flood your interiors with natural light. Open floor plans ensure clear sight lines to the water from as many angles as possible. And glass railings for balconies or decks can help maintain an unobstructed panorama of the lake.

a photo of a custom home on Mercer Island, a beautiful waterfront property that is designed to embrace the outdoors but is also close to the city of Seattle | built by Stacy Eakman Alair Homes Kirkland

2. Indoors and Outdoors on Mercer Island Washington

Mercer Island, located in King County, offers a variety of outdoor activities surrounded by natural beauty. Things to do on Mercer Island Washington include but are not limited to visint scenic parks and trails, perfect for hiking, biking, or leisurely strolls.

Mercer Island provides opportunities for kayaking, paddle boarding, and enjoying the stunning views of Lake Washington. Visitors can also relax at local beaches or enjoy picnics with family and friends. Mercer Island’s community hosts events and farmers markets that highlight its vibrant culture. Whether you’re seeking adventure or tranquility, Mercer Island Washington is charming in all seasons.

One of the greatest pleasures of waterfront living is being able to step out and enjoy the fresh air and serene environment whenever you please. To achieve this, prioritize indoor-outdoor integration. Take outdoor kitchens and dining areas for example. Equip your patio with built-in grills, durable outdoor seating, and ample counter space. Hosting a lakeside dinner party will feel effortless. 

Mercer Island Washington property with an open floor plan and stunning views | designed and built by Stacy Eakman alair homes Kirkland

Retractable glass walls are another great option as they allow you to open your home on warm days, connecting your indoor and outdoor living spaces with ease. Waterfront decks and patios help you take advantage of your property’s proximity to the water by designing outdoor spaces where you can relax, dock your boat, or just soak in the beauty of Lake Washington.

3. Choose Low-Maintenance Materials

Waterfront properties are subjected to unique environmental challenges, including exposure to moisture, UV rays, and lake breezes. To maintain your home’s curb appeal and longevity, choose high-quality, durable materials. Weather-resistant decking is a must. Materials like composite decking are perfect for withstanding the damp environment while still looking great. Marine-grade finishes help ensure that exterior hardware—such as railings, light fixtures, and outdoor furniture—can resist rust and corrosion. And tough siding options like fiber cement or treated wood help your home to handle the elements.

a photo of a bedroom in a custom home on Mercer Island Washington featuring beautiful views and weather resistant decking | designed and built by Stacy Eakman alair homes kirkland

4. Enjoy Your Outdoor Spaces on Mercer Island

With Mercer Island’s stunning backdrop, your outdoor areas should be designed for both relaxation and entertainment. Proper planning will transform your exterior spaces into functional, enjoyable extensions of your home. Fire pits or fireplaces create a cozy atmosphere for cool evenings overlooking the lake.

a photo of a recently completed custom home on Mercer Island Washington in King County, beautiful deck with stunning views of the lake | designed and built by Stacy Eakman Alair Homes Kirkland

Opt for greenery that thrives in the Pacific Northwest by landscaping with native plants such as ferns, hydrangeas, and rhododendrons, to minimize upkeep. If your home is directly on the waterfront, consider a private dock for boating or paddle boarding—activities Mercer Island residents love.

5. Consider Sustainable and Energy-Efficient Solutions

Living on Mercer Island means being part of a community that values sustainability and environmental stewardship. Incorporating eco-friendly features into your waterfront property can help you protect the stunning environment you call home. Solar panels take advantage of long summer days to produce renewable energy. Efficient windows and insulation keep your home comfortable year-round while saving on energy costs. And rainwater harvesting systems are great for collecting water for landscaping or other non-potable uses.

a photo of a bedroom with a deck in a custom home on Mercer Island Washington in King County built by Stacy Eakman Alair Homes Kirkland

6. Design on Mercer Island for Year-Round Comfort

Mercer Island Washington delivers distinct seasons, from warm summers to cold and rainy winters. Your home should be built to adapt to every season with ease. If you’ve ever walked on a cold floor in the morning you can understand the value of heated floors. Radiant heating is perfect for keeping your home cozy.

Covered outdoor spaces are another great option. Pergolas or awnings ensure you can enjoy the outdoors rain or shine. Efficient heating and cooling systems keep your interiors comfortable without wasting energy.

a photo of a custom kitchen in a waterfront property ( custom home on Mercer Island) designed and built by Stacy Eakman Alair Homes Kirkland

A Home Worth Living In

Designing a custom home on Mercer Island Washington isn’t just about aesthetics—it’s about creating a space that supports your lifestyle. By prioritizing views, durability, and functionality, you can craft a home that reflects the beauty of its surroundings while standing the test of time.

Looking for expert guidance on building a custom home in Seattle or Mercer Island? Our team specializes in creating custom homes tailored to your needs and Mercer Island’s unique environment. Get in touch today to bring your vision to life—we’d love to help you make the most of your custom home on Mercer Island.