My Story
Sandra McCullough
Associate Broker, The Agency · Investor · Designer · Wellness Advocate · Founder, TLL Collective
I believe homeownership is still the American dream, and helping people reach it is my favorite part of what I do.
I started my real estate career in 2007 as a mom of four, right as the market was shifting under everyone’s feet. It was a crash course in what matters most: knowing your numbers, negotiating hard, and never losing sight of the family behind every sale. I built a team that guided hundreds of homeowners through short sales, and I've personally closed 200+ sales. That season taught me that a home is never just a transaction. It’s security, a fresh start, and often the biggest goal someone has ever set.
Today I’m an Associate Broker with The Agency, licensed in both Arizona and California, in collaboration with the Sinani Luxury Advisors team. I’m a Certified Negotiation Expert and Certified Luxury Marketing Specialist, and over more than 18 years I’ve helped first-time buyers, growing families, investors, and luxury clients from around the world.
What I love most is the people. I love sitting down with a first-time buyer who isn’t sure it’s possible yet and building the plan together. I love helping a growing family find room to breathe, an empty nester find the right next chapter, and an investor find the property that makes the numbers work. And I never get tired of handing over the keys.
A home is more than an address. It’s where you rest, heal, gather, and grow. When real estate, design, and wellness work together, you don’t just move into a house. You build a life you love living in.
I’m also an investor and a designer. Years of buying, renovating, and managing my own properties taught me to see a home’s potential, and what that potential is worth. That’s why I founded TLL Collective, bringing my three passions under one roof:
Real Estate: buying, selling, and investing in Arizona and California with The Agency.
Design: from whole-home transformations to kitchens and baths, our design team and curated materials from around the world turn a house into your home.
Wellness Design: steam showers, saunas, natural light, open spaces, and meditation rooms that make your home a sanctuary where you always feel good.
Behind me is a full-service team and a trusted network of lenders, contractors, designers, and concierge partners. Whatever you need before, during, or long after closing, just ask. My relationship with you doesn’t end at the closing table.
Arizona License BR579404000 · California DRE License 01943522