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S.J. Dennen, CPA, P.C. is a full-service accounting firm serving clients throughout the United States, dedicated to providing our clients with professional, personalized services and guidance in a wide range of financial and business needs.

On this website, you will find information about S.J. Dennen, CPA, P.C., including our list of services. We have also provided you with online resources to assist in the tax process and financial decision-making. These tools include downloadable tax forms and publications, financial calculators, news and links to other useful sites. Whether you are an individual or business in or around North Andover, MA, Hampton, NH, or throughout the United States, S.J. Dennen, CPA, P.C. has years of valuable experience assisting professionals with their accounting needs.

We welcome any questions or comments you may have. Feel free to contact us at any time:



510 Turnpike Street, Suite 203
North Andover, MA 01845
Tel: 978-688-2581

New Hampshire

400 Lafayette Road
Hampton, NH 03842
Tel: 603-833-8654


You can also send us a message directly through the contact page of this website.