Business & Commercial Law
Ongoing business advice, purchases and sales, commercial agreements, financing documents, owner disputes and complex commercial litigation.
Perrin Law Firm, P.C. · Established 1990
For more than three decades, John M. Perrin has represented business owners, companies, property owners and individuals in transactions, disputes and litigation throughout Michigan.

The firm’s approach
Legal problems rarely fit neatly into one category. A business dispute may involve a contract, real estate, financing and ownership issues. A transaction may require not only drafting an agreement, but anticipating what happens if the relationship breaks down. An estate dispute may involve businesses, real property and years of financial transactions.
Perrin Law Firm combines business and transactional experience with decades of courtroom experience to help clients structure deals, solve problems and litigate disputes when necessary.
Discuss your matterPrincipal areas of practice
The summaries below introduce the firm’s principal practices. Each one leads to a dedicated page with more information.
Ongoing business advice, purchases and sales, commercial agreements, financing documents, owner disputes and complex commercial litigation.
Commercial purchases, sales and leases, together with disputes involving landlords, development, construction, ownership and title.
Contested matters involving wills, trusts, fiduciary duties, estate property, business interests, real estate and accountings.
Private dispute resolution informed by more than 35 years representing plaintiffs and defendants in civil litigation.
Dispute resolution
After decades representing plaintiffs and defendants in civil litigation, John Perrin also serves as a facilitator and arbitrator, bringing a practicing trial lawyer’s perspective to dispute resolution.
Available for matters involving

Experience matters
John M. Perrin has practiced law in Michigan since 1990, representing individuals, entrepreneurs and businesses in matters ranging from transactions and day-to-day business advice to complex litigation.
The firm’s approach is deliberately personal. Clients work directly with the attorney handling their matter—not through layers of associates and staff.
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Monday–Friday, 9–5
319 N. Gratiot Avenue
Mount Clemens, Michigan 48043