Room Addition in Star, Idaho

We design and build seamless room additions that give your home the extra space you need — built to match your existing structure perfectly and finished to the same high standard as the rest of your home.

Revitalize Your Home

Your home was perfect

— until you ran out of space.

Maybe your family has grown, you need a dedicated home office, or you're simply tired of feeling cramped in a home that no longer fits your lifestyle. Moving is expensive, stressful, and means leaving a neighborhood you love in a community like
Star that's becoming one of the most sought-after places to live in the Treasure Valley.


But adding on feels overwhelming — where do you even start? How do you make sure the addition looks like it belongs and doesn't stick out like an afterthought? And how do you find a contractor you can trust with a project this significant?

You need a room addition contractor in Star, Idaho who handles everything and delivers a result that feels like it was always part of your home.

We Build Additions That Feel Like They've Always Been There

At ATP Construction LLC, we specialize in room additions that integrate seamlessly with your existing home — matching rooflines, siding, flooring, and finishes so the new space feels natural and intentional, not tacked on. We manage the entire process from architectural planning and permitting through framing, insulation, electrical, and final finishes.

Our team has completed room additions throughout Star and the Treasure Valley, and we understand the local building codes, Ada County permit process, and the construction considerations unique to homes in this area.

You stay in your home throughout the process, and we work efficiently and cleanly to minimize disruption to your daily life. The result is more space, more comfort, and more home — without the hassle of moving.

How It Works

Free In-Home Consultation


We visit your home, assess the best approach for your addition, and discuss your vision, budget, and timeline. We'll walk you through design options and provide a clear, detailed estimate.

We Handle Every Detail


From permits and engineering to framing and finishing, we manage every trade and every step of the construction process — keeping you informed and on schedule throughout.

New Room, New Life


We complete your addition with a thorough walkthrough, ensuring every finish and detail meets your expectations. Then you get to enjoy the extra space you've been needing.

Room Addition Contractor You Can Trust


A room addition is one of the most significant investments you can make in your home, and it deserves a contractor who approaches it with the same level of care and expertise. At ATP Construction LLC, we don't just build additions — we expand homes thoughtfully, making sure every new square foot adds real value, comfort, and beauty.


We're local to Star and the Treasure Valley, we know the permitting process inside and out, and we've built a reputation for delivering room additions that homeowners are genuinely proud of.

Don't trust this project to just anyone. Choose ATP Construction LLC and get a room addition that enhances your home and your life for years to come.

Frequently Asked Questions

  • Will the addition match the rest of my home?

    Absolutely. Matching your existing home's exterior and interior finishes is a priority for us. We carefully match rooflines, siding, flooring, and trim so the addition looks like it was always part of the original structure.

  • Can I stay in my home during the room addition?

    In most cases, yes. We work efficiently and take steps to minimize dust, noise, and disruption to your daily routine throughout the construction process.

  • How long does a room addition take to complete?

    Most room additions take between 6 to 12 weeks depending on size and complexity. We'll provide a realistic timeline before work begins and keep you updated at every stage.