Custom Home Additions in Scottsdale, Phoenix, Fountain Hills, Arcadia & Paradise Valley, Arizona
Homeowners often consider home additions and remodeling to increase living space, accommodate luxury upgrades, enhance property value, and create personalized environments for their growing families, hobbies, and modern lifestyles. These types of home additions can include extra bedrooms, home offices, entertainment areas, and specialized spaces that reflect their unique needs and preferences.
Whether you need more space, want to add a second story, or plan to build a custom garage, McDowell Mountain Builders is here to transform your ideas into stunning results. Our specialized expertise and unique design approach set us apart, ensuring that your addition project not only meets your needs but also enhances the beauty and functionality of your home.
about our company
Why Choose Us?
Choosing McDowell Mountain Builders means partnering with a team of certified builders, skilled craftsmen and experienced home addition contractors who prioritize high-quality, eco-friendly materials and personalized service.
Our commitment to on-time delivery and transparency throughout the home remodeling process ensures a seamless and satisfying experience for our clients. We pride ourselves on our ability to communicate clearly and keep you informed every step of the way.
Custom Home Additions for Scottsdale and Phoenix Valley Homeowners
We offer a variety of custom additions for homes throughout the Phoenix Valley, including Scottsdale, Phoenix, Arcadia, Biltmore, Fountain Hills, Paradise Valley, Cave Creek, Carefree, Gilbert, Chandler, Mesa, Tempe, Ahwatukee, and other nearby communities. Common additions include:
Second Stories
Expanding your home vertically with a second-story addition can provide you with the extra space you need without sacrificing your outdoor area. Whether you’re looking to add bedrooms, bathrooms, or a luxurious master suite, our team will design and construct a seamless second-story addition that blends perfectly with your existing home. We ensure that the new level complements the architectural style and structural integrity of your current residence, creating a cohesive and elegant expansion.
Multi-Level Expansions
For those seeking to maximize their home’s potential, multi-level expansions offer an ideal home improvement solution. Our team at McDowell Mountain Builders specializes in creating multi-level additions that enhance both the functionality and aesthetic appeal of your home while sticking to building code. Whether you’re envisioning a new basement level (?), an extended living area, or a combination of floors to meet various needs, we provide innovative designs and meticulous craftsmanship to bring your vision to life.
Custom Garages
A custom garage addition can significantly enhance the convenience and value of your property. Whether you need additional space for vehicles, storage, or a dedicated workshop, we design and build garages that meet your specific requirements. Our custom garage solutions are tailored to match your home’s architecture and style, providing a practical and visually appealing addition. From single-car garages to expansive multi-car units, we ensure your new garage is functional and beautifully integrated into your property.
Build-Outs for Additional Rooms or Spaces
If your home feels cramped or lacks specific spaces, our build-out services are the perfect solution. We specialize in creating additional rooms or spaces that cater to your unique needs, whether it’s a home office, gym, playroom, or mother-in-law suites. Our team works closely with you to design and construct build-outs that seamlessly integrate with your existing layout, enhancing your home’s overall functionality and comfort. With our attention to detail and commitment to quality, we ensure that your new spaces are both practical and stylish.
What to Expect During the Home Addition Process
From the moment you contact us, you can expect a professional and personalized journey. We listen to your needs, provide expert guidance, and deliver a final product that exceeds your expectations. Our transparent process and dedication to quality ensure that your custom addition is a stress-free and enjoyable experience.
Initial Consultation
It all begins with a detailed consultation where we sit down together to discuss your vision, budget, and preferences.
Design Phase
Once we understand what you are looking for, our design team collaborates with you to create a custom plan that brings your ideas to life.
Construction Phase
With the design fully in place, our skilled craftsmen and builders put the plan into action with precision and meticulous attention to detail.
Final Walkthrough
With construction completed, we conduct a comprehensive walkthrough to make sure that all of our quality standards are met and that you are beyond happy with the final result.
What Our Clients Say
Discover the stories of satisfied homeowners who trusted us to bring their vision to life.
We highly recommend McDowell Mountain Builders to get the job done right! They are trustworthy and reliable. They transformed our out dated step up/ step down cave-like snail shaped master shower into a beautiful open and well functioning shower. Son Steve Diltz was awesome to work with! He guided us thru this process with great communication via texts, , phone calls and frequent on site visits to monitor work. From planning, to demo, plumbing, electrical, tile, drywall, paint, glass enclosure everyone was professional and courteous. Looking forward to updating other bathrooms in our home!
We hired McDowell Mountain Builders to build an entertainment wall in our home that we purchased earlier this year. The project included building the center part of the wall out 14 inches and adding tile and shelving as seen in the attached pictures. MMB, led by Steve Diltz, did a superb job in this construction project. The worker who did most of the work was one of the most careful and skilled carpenters I have ever seen. We are so pleased with the final product that we are considering hiring MMB to build an addition on the house ( if the HOA approves it).
Steve is the kind of builder who brings quality, integrity, and attention to detail to every project. Whether it's a remodel or a new build, he approaches the work with craftsmanship and care—and he makes sure things are done the right way, not just the fast way. He communicates clearly, follows through, and genuinely cares about the people he’s building for. Steve is not only a great contractor—he’s a great guy to have on your team.
We’ve had the best experiences with McDowell Mountain Builders. Over the years we have worked with other contractors and it’s always so stressful and unorganized. We worked with Steve and had great communication. The work is quality and beautiful! We would 100% work with them on future projects. Highly recommend!
MMountainBlders has worked on two projects for me, my private residence & a rental property. Not only are all these people fun to be around, fun to watch work, the finished product is amazing. From a complete demo & rebuild of two bathrooms, to tongue & groove ceilings in a living room, kitchen/dining & outside patio, to turning an unused bedroom into a sewing studio complete with 12 ft library ladder, these dudes are good! Much of this work I call works of art. Always on time, worked nonstop start to finish & w complete clean up. You couldn't do better anywhere.

McDowell Mountain Builders did an excellent job with our large remodel project. They were meticulous, timely, have great relationships with their subs and fantastic, skilled team. Highly recommend David and entire team.