Room Additions

Expand Your Home Without Compromising Its Character
Sometimes, the house you love just needs more room to grow. Whether your family is expanding, you’re craving a quiet office, or it’s finally time for that dream master suite, a custom room addition gives you the space you need—without the stress of moving.
At David Dunn & Sons Custom Carpentry, we build room additions that feel like they’ve always been there. From foundations to roofing, siding to finishes, every detail is designed to blend seamlessly with your existing home, both inside and out.
This isn’t just more square footage—it’s a natural extension of the life you’re already building inside your home.
Why Choose David Dunn & Sons for Room Additions?
Designed to Match Your Home’s Structure, Flow & Style
We build additions that match your home’s architecture—not just from the outside, but from the inside too.
Start-to-Finish Owner Involvement
David personally manages every phase of your addition. No subcontractor roulette—just clear communication and experienced hands on every detail.
Flawless Integration of Roofing, Siding, and Trim
From shingles and siding to fascia and flashing, we ensure everything flows together like it was built all at once.
Fully Code-Compliant and Professionally Engineered
We handle all permits, inspections, and structural planning—so your new space is safe, sound, and built to last.
Reputation Built on Referrals
Homeowners in Fort Mill and Sun City know they can count on us for quality, honesty, and craftsmanship that adds value for years to come.
Room Additions We Commonly Build
Primary Bedroom Suites
More space, privacy, and comfort
Family Rooms or Living Space Expansions
Room for gatherings and everyday life
Home Offices
Quiet, dedicated spaces to focus and work from home
Bathroom Additions
Improve function and flow with an extra bath
In-Law Suites
Independent, private space for aging parents or guests
Bonus Rooms
Flexible spaces for hobbies, workouts, or entertainment

What’s Included in a Custom Room Addition

Custom Architectural Design
We design your addition to flow seamlessly into your existing home layout—inside and out.

Foundation & Framing
From slab to structure, everything is built for long-term strength and stability.

Siding, Roofing & Exterior Trim
We match your home’s exterior materials so nothing looks patched or out of place.

Interior Finishes
We handle flooring, drywall, lighting, doors, windows, and more—ready for you to move in and enjoy.

HVAC, Electrical & Plumbing (If Needed)
We integrate every system so your new space is fully functional and up to code.
Room Additions Solve Real Problems
We love this house—we just need more space.
Our kids are growing and we’re running out of room.
My parents are moving in, and we want them to have their own space.
I work from home now and need an office that’s quiet and private.

Contact Us
Ready to Start Your Project?
Let’s design something you’ll be proud of for years to come. Whether you're just exploring ideas or ready to build, we’d love to hear your vision.