We’ve officially rebranded! AC Cornerstone Building is now Outlaw Ridge Construction!
We’ve officially rebranded! AC Cornerstone Building is now Outlaw Ridge Construction!
Your home should grow with you—and if it can’t, we’ll help build what’s next. At AC Cornerstone Building, we design and construct seamless home additions in Austin, TX that reflect how you live, what you value, and where you’re headed. Whether you’re expanding your current home or starting fresh on a lot, we deliver expert craftsmanship, honest communication, and a process built around you.
From first consultation to final walk-through, we keep things simple, transparent, and personal—because building a space you love shouldn’t be overwhelming.
Austin is growing fast, and so are the needs of local homeowners. Whether your family is expanding, you’re aging in place, or your lifestyle has changed, a home addition can be a smart and satisfying way to gain space without leaving the neighborhood you love.
Common reasons to add on:
✅ Need more space but love your current location
✅ Desire to avoid the cost and hassle of moving
✅ Outgrowing a home due to family size or lifestyle changes
✅ Investing in long-term property value with added square footage
✅ Creating a multi-generational living setup with an ADU or garage apartment
We help homeowners across Central Texas turn these ideas into reality—with a process that prioritizes clarity, quality, and peace of mind. We are a top rated contractor for home additions in Austin and custom homes.
Proud member of the Leander Chamber of Commerce.
You don’t have to leave your neighborhood to live in the home you’ve always wanted. Our team designs and builds home additions that blend beautifully with your existing structure—inside and out.
Types of additions we build:
Add bedrooms, offices, playrooms, or flex space with a seamless transition from the original layout.
Double your square footage without expanding your footprint—ideal for narrow lots or downtown homes.
Create the retreat you’ve always wanted with walk-in closets, large baths, and natural light.
Add function, storage, and resale value with well-integrated spaces.
Build an accessory dwelling unit for extended family or rental income.
Expand the heart of your home with more room to gather, cook, and relax.
We know that building something new—whether an addition or full home—requires trust and transparency. That’s why our process is simple and clear from start to finish:
We start by listening: What’s your goal? What challenges are you facing? We’ll visit your home or lot, take notes, and share our honest input.
We work with your architect or help you connect with a trusted local designer. We review floor plans, help with layout optimization, and discuss material preferences.
We provide a detailed, written quote that outlines labor, materials, and projected timeframes—so you can plan with confidence.
We manage all required permits, inspections, and scheduling so everything stays compliant and on track.
Our crew shows up on time, keeps the site clean, and keeps you updated. You’ll always know what’s happening and when.
Once the build is complete, we walk through the space with you, fix any small punch list items, and make sure you’re 100% happy.
We’ve helped homeowners all across Austin and Central Texas reimagine what home can be. Whether it’s a second-story addition in Central Austin, a garage conversion in Leander, or a room addition in Liberty Hill, we bring the same level of care to every job.
Visit our Our Work page to see photos of recent additions and other work. You’ll find clean finishes, thoughtful layouts, and practical touches that make everyday living easier. If you are interested in home additions in Austin, contact us today!
AC Cornerstone Building proudly serves homeowners throughout Austin and the broader Central Texas region. Whether you’re in the city or a nearby community, we bring reliable, high-quality remodeling services right to your door.
If you’re within driving distance of Austin, chances are we work in your neighborhood. Just reach out and ask—we’re happy to help.
If your home isn’t working for you anymore—or you’re ready to build from the ground up—AC Cornerstone Building is here to help you take the next step with confidence. With a clear process, local experience, and unmatched attention to detail, we make it easier to expand or build the home you’ve always wanted.
Let’s talk about your project. Use our simple Contact Us form to schedule your free in-person consultation and start planning your addition or custom home today.
