CPAs for your Growing Business

Clarke Starke & Diegel LLP is a premier accounting service specializing in family and owner-managed businesses.

Your trusted accountants in Waterloo Region

In the heart of Kitchener-Waterloo, CS&D stands as your time-tested partner, with personalized strategies and integrated tax planning.

Accounting for Family & Owner-Managed Businesses

Our aim is to empower your family business with personalized guidance, nurturing an environment where your legacy can flourish.

Accounting for Not-For-Profit Businesses

Not-for-profit organizations operate on a unique financial landscape. At CS&D, we understand the challenges that not-for-profits face.

Accounting for Professional Services

At CS&D, we offer tailored accounting services and solutions to help you navigate the unique needs of your professional business.

Meet the team

Meet CS&D’s adept team of accounting professionals.

A word from our clients

We have appreciated the expertise and professionalism of Clarke Starke and Diegel with our annual audits and financial reports for over 18 years! Their team has also supported our organization with answering inquires throughout the year regarding charitable laws and have been very supportive in helping us navigate through various funder reports. We highly recommend this amazing team of approachable and friendly professionals.

Deanne Gillies

KW Senior's Day Program

Contact us

Get in touch with us today for a productive conversation on how we can help your business.