Planning a home addition in Mercer Island? Call (425) 582-1983 to discuss a seamless, design-forward expansion of your home.
Craft & Forge Homes specializes in high-end home additions for Mercer Island homeowners. From thoughtfully integrated expansions to full-scale structural additions, we design and build spaces that feel original to your home—enhancing livability, value, and long-term comfort.
As families grow and lifestyles evolve, many Mercer Island homeowners find that their existing space no longer supports the way they live.
A custom home addition may be the ideal solution if you’re experiencing any of the following:
Limited bedrooms, cramped living areas, or a lack of flexible space can make daily life feel constrained.
Home offices, guest suites, expanded kitchens, or multigenerational living spaces often require additional square footage to function properly.
Many homeowners choose to invest in a home addition rather than relocate—preserving location, schools, and community connections.
If your home no longer fits your needs but you love where you live, our Mercer Island home addition contractors can help you expand with intention and precision.
Every home addition we build in Mercer Island is thoughtfully designed to complement the existing architecture while meeting modern performance and lifestyle standards.
We design luxurious primary suites with spa-inspired bathrooms, walk-in closets, and private retreats that elevate everyday living.
When lot coverage is limited, vertical additions offer a smart way to add space while preserving outdoor areas and maintaining curb appeal.
Open up your home with expanded kitchens, great rooms, and dining areas designed for entertaining, connection, and natural light.
We create comfortable guest accommodations and flexible living spaces that support extended family, visitors, or long-term adaptability.
Our team manages structural engineering, permitting, and city coordination to ensure your Mercer Island home addition meets all local requirements.
Through detailed 3D renderings and pre-construction planning, you’ll see how your addition integrates with your home before construction begins.
Hear from Patrick on how we built his perfect Patio.
Home additions require precision, coordination, and trust. Mercer Island homeowners choose Craft & Forge Homes because we deliver clarity and craftsmanship at every step.
We are fully licensed, insured, and experienced working within Mercer Island’s building codes and neighborhood standards.
A well-designed home addition should feel intentional—not like an afterthought. At Craft & Forge Homes, we design additions that enhance flow, functionality, and long-term value while honoring the character of your home.
Call Craft & Forge Homes at (425) 582-1983 to schedule your Mercer Island home addition consultation today.
With home construction in the Seattle area, pricing can be confusing.
We have a solution. Our cost guide gives you exact details for how much your project could cost based on industry standards.
What’s included in this cost guide:
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We don’t just build homes, we build futures. Hear from our past clients on how Craft & Forge helped bring their dream home into reality.
Here are answers to some of the most common questions we receive from homeowners considering expansion projects.
Most home additions take 8 to 16 weeks to complete, depending on the project's size and complexity.
Yes, virtually all home additions require building permits to ensure compliance with local codes and safety standards. We handle all permits to ensure that the entire process is smooth and stress free.
Building up with a second-story addition typically costs less than building out, as it uses your existing foundation.
Most homeowners can remain in their homes during addition construction, though some temporary inconveniences are unavoidable.
