Gobin & Leyenson LLP
1 lawyer · Durham Region
One of 91 law firms listed in Oshawa, and one of 6 handling Landlord & Tenant.
Virtual appointments
Virtual appointmentsAbout Gobin & Leyenson LLP
Gobin & Leyenson LLP is a law and paralegal firm in Oshawa, Ontario, working from an office at 17 John Street West that operates by appointment only. The firm represents residential landlords, businesses, and individuals in disputes and regulatory matters across the province. Marty Gobin, who holds a B.S.L.S., LL.B., and LL.M., is the firm's Barrister and Solicitor, and Managing Partner Olga Leyenson has been a licensed paralegal since 2008. Five more licensed paralegals and a legal assistant, who previously held a paralegal licence, round out the team, so most client files are handled by paralegals working alongside one lawyer.
The practice covers four main areas: residential tenancy law for landlords, civil litigation and Small Claims Court, criminal and provincial offences defence, and human rights advocacy, plus notarizing, commissioning, and legal opinions. Fees can be billed hourly, as a flat block rate, or on contingency for civil claims (contingency isn't offered for criminal or tenancy files), and the firm provides a retainer agreement for review before any fees are owed. Gobin teaches constitutional law at Ontario Tech University and paralegal courses at George Brown College, while Leyenson has taught part time at George Brown since 2018 and helped revise a Small Claims Court textbook used in Ontario paralegal programs.
Practice areas
Milestones & recognition
- Marty Gobin has been published in Canadian Lawyer Magazine, Law360 Canada, the Toronto Sun, and the Ottawa Citizen.
- Olga Leyenson has been a licensed paralegal in Ontario since 2008.
- Olga Leyenson contributed to two textbooks on paralegal ethics and communication and helped revise the 6th edition of Small Claims Court: Procedure and Practice.
- Olga Leyenson received the Platinum Jubilee Award, presented through the office of Oshawa's Member of Parliament, for service to the community.
In the community
- Marty Gobin served as past chair of the City of Oshawa's Property Standards Committee and teaches constitutional law at Ontario Tech University and paralegal courses at George Brown College.
- Olga Leyenson has taught part time in George Brown College's paralegal program since 2018 and volunteered on the City of Oshawa's Accessibility Advisory Committee from 2020 to 2022.
- The firm's blog tracks legislative changes affecting Ontario landlords, including a 2026 post on new rules letting tenants install window or portable air conditioning units and a 2026 post on changes to the notice period for personal use evictions under Bill 60.
Good to know
Wheelchair accessible
Woman-owned
LGBTQ+ friendly
Free parking
Virtual appointmentsLawyers 1
Who handles what
The neighbourhood
Gobin & Leyenson works out of an office on John Street West in Oshawa, a city of about 175,000 people located 60 kilometres east of Toronto and reachable by GO Transit. Oshawa's growth began with the automobile industry, and General Motors of Canada is still headquartered there, but the city has also become home to three post-secondary schools, Durham College, Ontario Tech University, and Trent University Durham, that together enroll roughly 22,000 students.
That academic side of the city runs through the firm itself. Gobin teaches constitutional law at Ontario Tech University, and associate Kimberly Lahtinen-Horenburg is an honours graduate of Durham College's paralegal program, so two of the schools that shaped Oshawa's recent growth also show up in the firm's own team.
Frequently asked questions
- What areas of law does Gobin & Leyenson handle?
- Gobin & Leyenson represents residential landlords, businesses, and individuals in tenancy disputes, Small Claims Court and civil litigation, criminal and provincial offences defence, and human rights matters, along with notarizing, commissioning, and legal opinions.
- I'm a landlord in Oshawa and a tenant isn't paying rent. Can the firm help?
- Gobin & Leyenson represents landlords across Ontario at the Landlord and Tenant Board, including non-payment of rent applications, and can help enforce a Board order afterward through the sheriff's office or Small Claims Court if a tenant still doesn't comply.
- Can Gobin & Leyenson represent me if I've been sued in Small Claims Court?
- Gobin & Leyenson handles Small Claims Court disputes up to $50,000, including wrongful dismissal, personal injury, contract, and negligence claims. A defendant has only 20 calendar days to file a defence before risking a default judgment, so the firm recommends acting quickly.
- I've been charged with impaired driving. Can the firm represent me?
- Gobin & Leyenson defends impaired driving charges along with other criminal and provincial offences, including reviewing the Crown's full disclosure for evidence that might be excluded from the case.
- Does the firm handle workplace discrimination or harassment complaints?
- Gobin & Leyenson represents employees facing discrimination or sexual harassment at work, as well as people denied service by a business or public agency on a protected ground, and can pursue a claim before the Human Rights Tribunal of Ontario.
- How does Gobin & Leyenson charge for its services?
- Gobin & Leyenson bills by the hour, by a flat block fee, or on contingency for civil claims, though contingency isn't available for criminal or tenancy files. The firm sends a retainer agreement for review before any fees are owed.
Where to find them
17 John Street West, Oshawa, ON L1H 1W8 · 905-240-5555
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