Home Additions in the DC, Maryland & Virginia Area
More room to live, gather, and grow — thoughtfully designed additions that look like they were always part of your home.
Start Your ProjectCreate the space your home is missing
When your home no longer fits the way your family lives, a well-designed addition can transform everyday life — without the stress of moving. For over three decades, Sun Design has helped homeowners across Northern Virginia and the DMV expand intelligently, blending new space seamlessly with existing architecture.
From a sun-filled great room to a private primary suite or a multi-story addition, our integrated design-build approach ensures every square foot feels intentional, beautiful, and built to last.
Types of Home Additions
Whatever your home is missing, we design and build it to feel like it belongs.
Primary Suite Additions
Spacious bedroom retreats with spa-inspired baths and custom walk-in closets designed for comfort and privacy.
Great Rooms & Living Spaces
Light-filled family rooms and open-concept living areas that bring everyone together and connect to the outdoors.
Multi-Story Additions
Two- and three-story expansions that add square footage on every level while preserving your home’s character.
Sunrooms & Four-Season Rooms
Year-round spaces that flood your home with natural light and create a seamless connection to your landscape.
In-Law & Guest Suites
Accessible, independent living spaces ideal for multigenerational families and thriving in place.
Kitchen & Dining Expansions
Bump-outs and expansions that give your kitchen the room it deserves for cooking, gathering, and entertaining.
Design-Build, Start to Finish
One trusted team for design and construction means a smoother, more predictable experience.
Discover
We start by understanding how you live, your goals, and your budget to define the right scope.
Design
Our architects and designers craft a cohesive plan that blends seamlessly with your existing home.
Build
Our skilled craftsmen bring the design to life with care, communication, and respect for your home.
Enjoy
We deliver a beautiful new space — backed by our Forever Home Care warranty for years to come.
Additions Built to Belong
Seamless Architecture
Our additions are designed to match your home’s rooflines, materials, and proportions — so new and old feel like one.
Structural Expertise
From load-bearing walls to full-scale expansions, decades of experience mean it’s done safely and right.
Thriving in Place
We design for the long term, creating accessible spaces that support comfort and well-being at every stage of life.
Award-Winning Craftsmanship
An integrated design-build team and a 35+ year reputation for quality across the DMV.
Ready to add on to your home?
Let’s design the space your family has been dreaming of. Schedule a conversation with our design-build team today.
Contact Us