Our Home Additions

Need more space but love where you live? We design additions that complement the existing home so the final result looks like it organically grew over time and remains contextual to the neighborhood. Whether you are going up an additional level or extending your footprint outward, Blue Star guides you through the complexities of DC zoning and permitting with the architectural vision and structural expertise your investment deserves.

In-Law Suite

Create a private, beautifully considered retreat for family members or guests. Designed around Living in Place principles, our in-law suites prioritize accessible, barrier-free design using universal design and/or ADA principles without sacrificing the high-end aesthetic that defines the rest of your home.

Additional Floor

When your footprint cannot grow outward, we build upward. We specialize in adding full levels to existing homes, meticulously matching historic facades and reinforcing structure to support expanded, architecturally cohesive living areas based on our Lifestyle Driven Design Process

Rear & Side Additions

Extend your home’s footprint to create the chef’s kitchen, sun-filled family room, or primary suite you have envisioned. We design rear and side additions that feel like a natural part of the original architecture, not something added on.

Two-Unit Conversions

Thinking about converting your home into a two-unit property? We guide homeowners through the design, permitting, and construction process from start to finish. Our team consists of knowledgeable professionals who understand separating utilities, the registration process, and multi-family code requirements, making the transition manageable without sacrificing the architectural quality your home deserves.

Basement Dig-Outs

Creating high-ceiling, usable space below grade is one of the most technically demanding architectural feats a DC homeowner can undertake. At Blue Star, we provide the specialized structural expertise required to safely lower your home’s foundation, expanding your square footage without compromising the integrity of your residence or your neighbors’.

Garage Conversions

Repurpose underutilized structures into refined, high-performance living spaces. We transform garages into home offices, fitness studios, or private suites, reconfiguring the existing space and providing the electrical, plumbing, and HVAC systems needed to turn non-habitable space into habitable space.

Carriage Houses

We utilize lifestyle-driven design to maximize detached spaces for their intended purpose, whether for aging in place, a guest suite, or a professional workspace. Designed and finished to the same standard as the rest of your home, our carriage houses add lasting value while our experts guide you through the zoning and permitting complexities unique to DC.

Your Home Has More Room Than You Think

You don’t have to choose between more space and the neighborhood you love. An addition, whether it’s a new floor, a rear extension, a dug-out basement, or a converted garage, lets you get the room you need without leaving what you already have. The right addition doesn’t look tacked on. It looks like it was always part of the house.

Blue Star combines award-winning design, structural expertise, and deep experience with DC’s zoning and permitting process, so you get a home that’s genuinely bigger, not just more crowded. If you’re ready to talk through what’s possible for your specific lot and home, we’d love to start that conversation.

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Happy Clients

Blue Star’s best trait is their attitude. Everyone is unfailing polite, even when things got hard. And when things went wrong, which I fully anticipated would happen, you guys did the right thing every single time.

— Allyson & Dave, Capitol Hill

When you buy from Eric and his team, you can rest assured that they will address problems your inspectors couldn’t see.

— Jimmy, Shaw

The craftsmen used were excellent. We were impressed with their work and attitude and ability to creatively work around issues. The addition seamlessly integrates into the rest of the house and it’s hard to believe that the new spaces haven’t always existed as part of the original home.

— Capitol Hill Homeowners

Blue Star loved the architectural and design challenges I handed them, and each time I came up with a new idea, they were driven to figure out the best way to deliver.

— Cari, Atlas District

I was very pleased with my experience with Blue Star. The reason for the top 5-star rating is three fold- the quality of the work, the prices they obtained for materials and the design elements. I did a large renovation (kitchen, 3 bathrooms, HVAC, plus knocked down some walls) which took about 4 months.

— Kristen, Capitol Hill

Blue Star came in on budget and ahead of a very, very tight and critical schedule. We highly recommend them to anyone considering a renovation.

— Larry, Woodley Park