Gagnon Law Firm

Protect What's Important

We help clients preserve their family legacy -- through estate and succession planning; advice on growing  business, farm, or real estate holdings; and, when necessary, protecting our clients' interests in a court of law.

Business, Estate Planning, and Probate, Northwest Missouri

Practice areas

At Gagnon Law Firm, we provide the following legal services.

Wills & Trusts

We draft wills, trust, and other estate planning documents to help our clients avoid probate and transfer their assets to their loved ones.

Probate Administration

We provide experienced counsel in helping clients administer trusts and estates for their family.

Real Estate

We can help you with your real estate transaction or, if necessary, enforce your rights in court for landlord/tenant matters, partition actions, quiet title suits, and boundary disputes.

Business and Farm

We are general counsel to businesses regarding corporate formation and operation, as well as day-to-day advice on contractual, employment, and regulatory matters. We also represent our business clients in civil lawsuits.

Local Government

We are proud to serve as attorney or city prosecutor for public entities in Clinton County and throughout northwest Missouri.


If you need to enforce your rights in court -- or find yourself defending those rights -- we have experience filing and defending lawsuits locally and in state and federal courts throughout Missouri.

We are ready to help you.
Connect with us.

Business, Estate Planning, and Probate Lawyer

About Gagnon Law Firm

Since 2008, the Gagnon Law Firm has provided legal services to individuals, small business, and families in Missouri and Kansas. We have offices in Plattsburg and Lathrop, Missouri, but can represent clients throughout the area, including Clinton, Clay, Platte, Caldwell, Daviess, DeKalb, Ray, Andrew, and Buchanan counties.

No matter your legal needs--drafting a will, handling an estate for a deceased parent, enforcing your contractual rights, or buying and selling real estate--we are there to assist you in a capable, professional, and prompt manner.

Business, Estate Planning, and Probate Legal Team

Meet the team

Our staff is ready to dedicated to delivering courteous, professional, and affordable legal services to our clients.

Joseph A. Gagnon

Joseph A. Gagnon

Managing Attorney

With almost 20 years legal experience, Joe can provide steady, professional guidance on legal problems facing area families, farmers, and businesses.

Casondra Stanford

Casondra Stanford


Casondra assists Firm clients in litigation matters, providing support to our attorney as cases move through the court system.

Jennifer Rose

Jennifer Rose

Legal Assistant

Jennifer provides critical services for our attorney and clients and keeps the office functioning smoothly.

Get in touch with
Gagnon Law Firm

Potential new client form
Fill Out Form
Call us

119 N. Main St
Plattsburg, MO 64477

Get Directions