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About Us


The PiperPartners Team at Keller Williams Realty is committed to helping our clients buy and sell their homes for the right prices.

Our mission is simple: We improve lives by delivering 5-star real estate service with the highest levels of competence, trust, and integrity. We are known as connected, compassionate, and giving leaders in the communities we serve.


See what others have to say about us.


Andy Piper

Founder, CEO

Listing and Buyer Specialist

andy1Andy Piper is the founder and CEO of the PiperPartners real estate team – He is also creator of the proprietary 189-step Piper Partners Marketing Formula™. Andy is well-known for his in-depth local knowledge and his outstanding service to his clients, and is renowned for his marketing savvy, particularly in regard to online marketing – he has created one of the most powerful, cutting-edge and comprehensive real estate websites in the country, with more than 3000 pages.

Andy Piper is a top producer at Keller Williams – top 5% of all Keller Williams Ann Arbor real estate agents. He is a member of the Keller Williams Agent Leadership Council and is a KW Mentor.  Andy brings his customer-first approach along with strong marketing, negotiation and management skills to each real estate transaction.

Andy, his wife, Diana, his three children, Karl, Marta, Julia, and their four cats have been Ann Arbor residents since 1996. Born and raised in Grosse Ile, Michigan, he has a degree in Urban Planning from Michigan State University.

An expert on Ann Arbor area communities and neighborhoods, Andy is up-to-the-minute on market conditions. He works hard to maximize results for each client. He is known for being committed to advancing knowledge on technology and social media.

Call Andy at (734) 604-8242 or Email at Andy@piperpartners.com


Tanya Hill


tanyabwTanya Hill brings a diverse set of experience to her role as Realtor on the PiperPartners Team: ten years as a licensed real estate agent in Ann Arbor, ten years as an educator, and five years as a public speaker on Energy Efficiency for DTE Energy. She is committed to using her well-rounded background to ensure clients get the best possible value out of the home buying process.

Tanya is a native Michigander and Ann Arbor townie with detailed knowledge of the city’s neighborhoods, homes, educational opportunities, entertainment, and restaurants. With her deep knowledge of the Ann Arbor area, Tanya is able to not only ensure the home buying process goes smoothly, but can also comprehensively help buyers acclimate to their new surroundings.

Call Tanya at (734) 330-4310 or Email at Tanya@piperpartners.com


Rebecca Sturgis


Rebecca Leigh specializes in Buying and Selling residential real estate for The PiperPartners Team. She has successfully worked with clients from Ann Arbor, West Bloomfield, Farmington Hills, Grosse Pointe, Canton, and Saline among other Metro Detroit areas. Every step of the way, Rebecca provides unbeatable customer service to her clients. Her enthusiasm for real estate shines through in her work with clients.

Rebecca has lived in Ann Arbor since she was in elementary school and is a graduate of Ann Arbor Huron High School, where she was Captain of their Women’s Varsity Water Polo team. During this time she also qualified and competed in the National Junior Olympics twice. When Rebecca is not working with clients you’ll likely find her doing something near water, like boating on Lake St. Clair or at Muscamoot Bay with friends and family.

Rebecca works diligently for her clients Monday-Saturday helping them achieve their individual real estate goals. On Sunday, Rebecca dedicates her time to God and family.

Call Rebecca at (734) 821-0796 or Email at Rebecca@piperpartners.com


Dori Patrick


Dori’s real estate experience spans across states, from Myrtle Beach, South Carolina to Ann Arbor, Michigan. She is passionate about helping families to find homes they will enjoy for years to come. Before her career in real estate, Dori had a highly technical and detail-oriented job as a surgical assistant. She brings this attention to detail to her work with clients, making sure they are well taken care of throughout the homebuying process from the first time they reach out to the time that they close.

Dori is knowledgeable about the Ann Arbor area, is an avid Michigan Wolverines fan, and loves kayaking on the Huron River in the summer. Dori is dedicated to animal rescues as well as other local causes. A portion of the proceeds from her real estate closings will go to a local charity.

Call Dori at (843) 957-0520 or Email at Dori@piperpartners.com

Ashley Gartrelle

Inside Sales Manager & REALTOR®

ashleybwWith five years of real estate experience, Ashley Gartrelle manages both administrative and sales responsibilities for the PiperPartners Team. Her work includes client care and communication, internal operations, and outbound prospecting. She also has extensive experience managing listing coordination.

Ashley was born and raised in Metro Detroit, and completed general studies at Macomb Community College. She currently lives in Ann Arbor and loves hiking, kayaking, biking, and doing yoga.

Call Ashley at (734) 821-0793 or Email at Ashley@piperpartners.com

Mariah LeRolland-Wagner

Executive Administrator

Mariah is a local Saline resident, having grown up and worked in the area for over ten years. With a Masters in Administration from Central Michigan University, Mariah has worked with a variety of non-profit organizations for the past six years as a Program Manager. Currently, she uses her experience in managing to help create an ideal environment for buyers, sellers and agents by handling all the behind the scenes magic to make sure you have a smooth deal.

When not in the office you can find Mariah enjoying some sunshine and water. In the summer she can be found swimming at Fuller pool or floating down the Huron River. During the colder months she is an active member at the YMCA and coaches youth swimming in Whitmore Lake. A great resources for families with kids, Mariah knows all about the various cool things to do and spots to check out with kids.

Call Maggie at (734) 821-0795 or Email at Mariah@piperpartners.com

Maggie Cease

Marketing & Operations Director

Cease-Maggie-Team-Pic-1 copy (1)

An Ann Arbor native, Maggie is a graduate of University of Michigan where she graduated with a degree in psychology. After continuing studies in Toronto, Ontario on a Fulbright scholarship, Maggie has been marketing for small businesses in Ann Arbor ever since.

At PiperPartners, she provides strategic consulting, project management, and marketing plan development. This includes managing website content, administering email and direct mail, shooting professional-quality photos and videos, and designing graphics.

When she’s not working, Maggie loves eating at Ann Arbor’s many tasty restaurants with family and friends, as well as cooking at home. Always making something with her hands, she’s likely to have a woodworking or knitting project underway, too.

Call Maggie at (734) 531-9311 or Email at Maggie@piperpartners.com


Contact Us

For immediate assistance, call us at 734-845-9700 or email Andy Piper at andy@piperpartners.com.