CHI Group

The dynamic CHI Group at Compass leverages the power of teamwork to exceed client goals with responsive service and unrivaled skill. As experts in the Chicago real estate market, this elite collection of specialists collaborates closely and pools their strengths to ensure the entire process is as seamless and successful as possible. Formed by Stephany Oliveros Hallstein — consistently named among the city's very best brokers by the Chicago Association of Realtors, Chicago Magazine and Crain’s Business Chicago — The CHI Group is committed to delivering a full-service advisory approach and total integrity in everything they do.

While Stephany lends her noteworthy experience and problem-solving skills to every transaction, Billy Cooper, with his tenacious attitude and enthusiasm, is the perfect ally for buyers and sellers. Multi-talented Daniel Sanchez provides construction knowledge and helps sellers get their home ready for the market and assists buyers in envisioning a space's true potential. As the group's indispensable operations manager, Kay Pascual-Martinez keeps the whole team running smoothly, adding her organization and efficiency to the mix.

Above all, the CHI team is committed to cultivating lifelong repeat and referral business, and they truly understand the weighty importance real estate has in their clients' lives. With that in mind, they craft a customized approach to achieving each buyer's individual needs, informed by budget, location and time frame, and they're known for providing creative and economical marketing strategies for sellers. With every detail handled in an efficient and timely manner, clients repeatedly praise The CHI Group for making even the most challenging transaction look easy.


"Stephany is terrific. She was hands-on in getting my house prepared for sale. Her attention to detail was impressive, like nothing I've seen before. No doubt in my mind that we got top dollar and a quick sale because of all the work she put in prior to putting up the "for sale sign." Super organized, easy to communicate with, great ideas, excellent follow through, driven to get it done. Knew exactly how to market the property for the neighborhood it was in. She makes you feel like you are her number one customer and she is thinking about selling your house 24-7. Would highly recommend her."- Thomas L, Chicago, IL

"Highly, highly recommend using CHI [Group] and Stephany’s team! Stephany is a very knowledgeable real estate professional, who is also very personable and a joy to work with. She is attentive to your needs, and also promptly responds and is readily available when you need her. She is by far the best agent I’ve used in Chicago!"- Shawn S, Old Town, Chicago, IL

"Moving across state lines required a realtor and buyer relationship that would include strategic planning and geographical education regarding schools, neighborhoods and commute times that would fit our life schedules. Stephany made this potentially overwhelming transition seamless and enjoyable. She included my children in all aspects of the process which in turn became a true family involvement that subsided much of their worries regarding relocation."- Michelle S Barrington, IL