Home Additions in Knoxville, TN

Bedrooms • Sunrooms • Living Spaces • Four-Season Rooms

Brightly lit seating area in a covered sunroom

Room to Grow, Right Where You Are

Need more room without leaving the home you love? Forks River Construction designs and builds home additions that blend with your existing house, inside and out. From expanded living areas and new bedrooms to sunrooms and four-season rooms, our team works closely with you to bring your vision to life. With careful planning, quality craftsmanship, and attention to every detail, we make adding on feel seamless from start to finish.

Additions That Look Like They Were Always There

The hardest part of an addition isn't the new room. It's the seam where new meets old. Brick, siding, and shingles weather over decades, and a near-match stands out from the street. We source and match aged materials so your addition reads as part of the original house.

“The key to any addition is making the transition seamless. The goal is for it to look like the original house was built that way. Matching aged materials is tedious work, but it’s essential when we’re matching brick, siding, shingles, and foundation materials.”
— Kathryn Mulcahy, Forks River Construction Owner

Home Additions We Commonly Build

Bedroom and master suite additions — Add a bedroom for a growing family or a primary suite with its own bath and closet, without giving up the neighborhood you've settled into.

Expanded living areas — Open up a cramped family room or extend your main living space so everyday life and holiday hosting both have room to breathe.

Sunrooms — Bring in natural light and a view of the yard with a room designed to feel like it belongs to the house, not bolted onto it.

Four-season rooms — A fully finished, heated and cooled space you can use in January as easily as in June.

Additions for Older & Historic Knoxville Homes

Older homes are our specialty. Adding on to a house built decades ago means working with original framing, rooflines, trim profiles, and foundations that don't follow today's standard dimensions. We plan around those details instead of covering them up.

Our commitment ensures your project preserves the character of your home while creating a comfortable, modern living space that helps you honor Knoxville's history and invest in its future.

How a Home Addition Comes Together

We walk your home, talk through how you want to use the new space, and look at how it will tie into the existing structure. If you're working with an architect or designer, we'll work from their plans.

1. Design Consultation

Once the plan is set, you get a fixed-price contract with clear allowances, so you know what to expect before work begins.

2. Fixed Price Contract

An addition changes your home's footprint and structure. We pull every required permit and handle the process for you.

3. Permits, Every Time.

4. Construction with a dedicated project manager

Your project manager is your single point of contact. You'll see progress, selections, and schedule in your online client portal, and get regular updates along the way.

5. Final walkthrough

We walk the finished addition with you to make sure every detail is right.

Why Homeowners Choose Forks River for Their Addition

When you choose Forks River for your home addition, you'll have a dedicated project manager guiding you every step of the way. Communication is our strong suit: your online portal keeps the schedule, selections, and progress photos in one place, and we'll tell you right away if anything changes.

We keep the job site clean with a light clean every day and a deeper clean each week, because you're still living in your home while we work. We also handle the details, from ordering fixtures to coordinating trades, so the experience stays hands-off for you.

  • From estimating and pre-construction planning to implementation and oversight, the collaboration is seamless and professional. They are committed to delivering a truly finished product, ensuring every detail is addressed before project closeout. As a professional design firm, we highly recommend Forks River Construction for renovation and construction projects of any scale.

    Danielle Miller

  • The finished product is beautiful, functional, and exactly what we envisioned. If you’re looking for a contractor who communicates well, stands behind his work, and can tackle even the most challenging projects, we highly recommend Forks River Construction.

    Leighann Madden

  • Dan was a great communicator and project manager. He addressed every question, anxiety, strange request and issue we had with a positive attitude every time. We returned to Knoxville to find our project 100% complete, and the quality was fantastic. We will hire Forks River for every future project. Highly recommend!!!

    Jennifer Ehlen-Albrecht

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