celebrating 24 amazing years in chicago

November 2017
Front View of Sine Qua Non

Hi, it’s Laura, owner of Sine.  It’s hard to believe that 24 years ago today I opened Sine Qua Non.

  I knew it was a risk and a gamble. I didn’t know what I was doing, or how much it would enrich my life and force me to be a better person. To all the humans who have worked at Sine, or been a client of ours, I am so humbled. Every relationship, every stylist and every guest has enabled me to have this amazing company, and to learn how to be a leader (I’m still learning).  I wanted to be a Rock Star, I ended up being a friend, a mentor, a job provider.  I am exactly where I need to be.  Thank you Chicago, and every single person that has walked through our doors.  You have all left your mark and kept us going strong for 24 years.  See you in the salon soon! 

Yours in service, Laura B. 

In celebration of 23rd anniversary week, we're headed back down SQN memory lane today. #IamSine

A post shared by Sine Qua Non Salons (@sinequanonsalons) on

Our Reviews


COVID SAFETY is our number one priority.
As the Delta variant becomes the dominant strain in Chicago, we encourage the wearing of masks. However, our current policy is, if you have proof of vaccination you can have a maskless service if you prefer. We will continue to update our policy as things develop.

At Sine Qua Non, we know things happen. In order to ensure that we can accommodate all of our guests needs, we require that you give us at least 24 hours notice to cancel or reschedule your appointment.

We are unable to hold any appointment without a valid credit card on file. If you cancel without 24 hours notice or no show for your appointment, a charge equal to 50% of your service and will be charged to your card.

Our goal is complete happiness with your fresh cut and color. If you need an adjustment service, they are free within 2 weeks from your original appointment, preferably with your original stylist. If a refund is requested, our policy is: Call and schedule an assessment with management within 2 weeks of your service. You must come into the salon, so we can see the problem in person. If you received an adjustment at a different salon or cannot stop by so we can see your hair, we will not refund your services.

It is important to us that you are totally happy with your purchase. Product returns must happen within 30 days of purchase, be accompanied by a store receipt (and we can view in your client file) and the product must be nearly full. If you paid by credit card, you may receive a credit on your card. We are a completely cashless business.

We are committed to giving you the best one-on-one service available. If you are more than 15 minutes late, and we are unable to give you the attention you deserve, we ask that you reschedule your appointment for another day or with an available stylist.

Welcome to your

Stylist match quiz!

Find the perfect
Siné hairstylist for you!