ADUs and Casitas
Create more space for the people and possibilities that matter most. From private guest houses to multigenerational living, we build custom ADUs and casitas designed around your property, your family, and your future.
More Space. More Possibilities. Right in Your Own Backyard.
Whether you need a comfortable place for aging parents, a private space for adult children, a guest house for visiting family and friends, or simply more room to enjoy your property, an ADU or casita can add flexibility, function, and long-term value to your home.
At Cornerstone Construction Services, we specialize in helping Tucson-area homeowners turn underused space into thoughtfully designed living spaces that feel like a natural extension of their property.
From the first conversation through construction and final completion, we’ll help you navigate the process and build a space designed around how your family wants to live.
Why Build Your ADU With Cornerstone? With Us, It's Personal.
Your casita may be an investment in your property, but more often, it’s an investment in your family.
That’s something we don’t take lightly.
Cornerstone Construction Services is a family-owned, woman-owned Tucson general contractor committed to honesty, integrity, communication, and quality workmanship.
We listen first. We ask questions. We explain your options. And we work with you to find practical solutions that respect both your vision and your budget.
Because when you’re adding a home to your home, you want a contractor who understands just how personal that project really is.
What Is an ADU?
An Accessory Dwelling Unit (ADU) is a secondary living space located on the same property as a primary residence. You may also hear them called casitas, guest houses, mother-in-law suites, granny flats, or backyard homes.
Depending on your property and goals, an ADU may be:
- A detached casita or guest house
- An attached addition to your existing home
- A garage conversion
- Living space constructed above or alongside a garage
- A multigenerational or aging-in-place suite
Whatever you call it, the goal is the same: create useful, comfortable living space that works for your property and your family.
One Casita. A Lot of Possibilities.
There isn’t just one reason to build an ADU. Your needs today may also look very different five or ten years from now.
Multigenerational Living
Keep family close while still giving everyone their own space. A casita can provide parents, grandparents, or adult children with privacy and independence while keeping family nearby.
Aging in Place
Create a comfortable, accessible living space for yourself or a loved one. We can incorporate features such as zero-step entries, wider doorways, walk-in or roll-in showers, accessible bathrooms, and thoughtful layouts designed with the future in mind.
Guest House
Give family and friends a private, comfortable place to stay without sacrificing space inside your primary home.
Space for Adult Children
Housing needs are changing. A casita can give adult children an affordable path toward greater independence while maintaining privacy for everyone.
Home Office or Flexible Space
Your ADU doesn’t have to serve just one purpose forever. A well-planned casita can transition from an office or guest suite today to family living space later.
Ready to explore what’s possible on your property?
