Pearsall, Marshall, Halliwill & Seaton LLP
Est. 1965

Pearsall, Marshall, Halliwill & Seaton LLP Homepage

Pearsall, Marshall, Halliwill & Seaton LLP is a law firm with locations  in Leamington, Tecumseh and Lasalle. We specialize in corporate-commercial law, real estate law, family law and wills and estates. 


Advocating for windsor and essex county since 1965. 

Pearsall Marshall Halliwill and Seaton LLP is proud to be representing individuals and businesses within Windsor and Essex County since 1965. Our firm specializes in corporate commercial law, real estate law, family law and wills and estates. We bring extensive experience and professionalism to every legal issue and customize our support to your needs and concerns. We have offices located in Leamington, Tecumseh and LaSalle as a convenience to our clients.  

Our lawyers David Halliwill, David Seaton, Matthew Caron, Amanda Camlis, and Jonathon Sinopoli have continued to build the law practice established by Spencer Lorne Pearsall in 1965. They bring a fresh perspective while maintaining the principles of integrity and respect that our practice was founded on. What truly sets them apart, however, is their unwavering dedication to serving their clients, both new and old. They are hard working lawyers who will diligently protect your interests. 

Get in touch with us by calling to set up a consultation, or use the contact form at the bottom of this page to inquire whether our services are right for you.




P: 519-326-4415

F: 519-326-1844




22 Queens Ave,

Leamington, ON N8H 3G8


13831 Riverside Drive E, Unit 3

Tecumseh, ON N8N 1B5


2055 Sandwich West Parkway, Unit 200

Lasalle, ON N9H 2S4

➤ Hours of operation

Normal business hours are Monday-Friday from 8:30 a.m. to 5:00 p.m. but special appointments can be arranged.

The office is closed on Saturday and Sunday.



Areas of practice

wills and estates

We understand the importance of having a plan for the future. Our lawyers prepare wills of all levels of complexity to allow you to provide for your family and to ensure your desires are carried out.  Our lawyers develop estate plans, administer trusts, and draft Powers of Attorney for Property and Personal Care. We also provide in-depth advice to individual clients on a range of legal issues including the interpretation of wills and trusts arrangements, the rights of beneficiaries and mental incapacity issues.                                                                                                                                                                                                                                                   

residential and commercial real estate

Our lawyers represent individuals and corporations in a broad range of residential and commercial real estate matters. Whether you are purchasing, selling, mortgaging or leasing your property, we will work hard to protect your interests. We provide specialized legal services including:

  • Negotiation, drafting and review of Agreements of Purchase and Sale

  • Commercial real estate and leasing transactions

  • Land acquisition and assembly

  • Zoning matters and land use matters

  • Secured and unsecured financing transactions

Employment Law

Our lawyers represent individuals and corporations in a broad range of employment law matters. Whether you are a business owner striving to meet statutory requirements in drafting Employee Handbooks, Employment Agreements, Dismissals or responding to Ministry of Labour investigations,  or an employee who may have been the subject of a wrongful or constructive dismissal, we will provide you with timely, practical and cost-effective legal options to ensure that your interests are protected. We provide specialized legal services including:

  • Drafting of Employee Handbooks and/or Policies regarding Employment Issues

  • Workplace Investigations in response to harassment, discrimination or other complaints

  • Drafting of Employment Agreements

  • Legal Advice Regarding Dismissals with and without Cause

family law

We approach every family matter with patience and open-understanding. Our goal is to mitigate the financial and emotional cost of your family dispute. David Seaton is an experienced family lawyer with expertise in such areas as child and spousal support, custody and access arrangements, division of family assets, sale of the family home, marriage and cohabitation agreements and much more. David Seaton is committed to providing couples and families with individualized and thorough legal advice to help you through these complex personal matters.                                                                                                                                                                               

CORPORATE and commercial

We are committed to providing sensible legal advice to our clients in a broad range of national and international transactions in a variety of industries. We represent local greenhouse operations, family businesses, and important multi-national corporations. Let us help you navigate the way through the many issues that arise in the ordinary and extraordinary course of business, including: 

  • Incorporations and corporate reorganizations

  • Corporate finance and securities

  • Shareholder and Partnership Agreements

  • Purchase/Sale of business assets and shares

  • Negotiations of lease, franchise and other commercial agreements


Let's Chat.

We look forward to hearing from you. However, before we are able to assist you, we must ensure that there are no conflicts of interest. Please complete this form without including any confidential information. Any email communication does not constitute legal advice and it does not establish a client/lawyer relationship until our lawyers agree to retain on your legal matters. You may also email or call us to make an appointment.

For job opportunities, please email us your resume. We are always looking for new and exceptional talent to lead the firm into uncharted fields of practice.

Name *
Please do not include confidential or sensitive information in your message. In the event that we are representing a party with opposing interests to your own, we may have a duty to disclose any information you provide to our client.