LAWYER PROFILE
Sidonia J. Tomasella

Sidonia J. Tomasella

Canada 2026

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Ranked in 1 practice area

About

Provided by Aird & Berlis LLP

Canada

Practice Areas

Sidonia offers her municipal and land use planning clients a unique value proposition. In addition to her legal experience, her previous career as a land use planner gives her clients the added benefit of understanding the technical aspects of land development which, along with her time at the City of Toronto’s Legal Division and at the Ontario Ministry of Municipal Affairs and Housing, also provides excellent insight to the decision-making process. She is dedicated and passionate about making a meaningful contribution not only to her clients’ files, but to the development of communities.

Sidonia is Co-Practice Group Leader of the firm's Municipal & Land Use Planning Group. She assists private and public sector clients through the development and application process, from pre-consultation with various city departments to representation before the courts and various municipal authorities and administrative tribunals, including the Ontario Land Tribunal (formerly the Local Planning Appeal Tribunal).

Early in her career at the firm, Sidonia was seconded to the City of Toronto’s Legal Division (Planning and Administrative Tribunal Law section). Before beginning her legal practice, she was a senior land use planner and a municipal policy advisor for the Ontario Ministry of Municipal Affairs and Housing, where she was involved in a number of government initiatives related to land use planning, municipal governance and housing. Sidonia also lectures on land use planning matters at Toronto Metropolitan University (formerly Ryerson University) to students of the university’s Urban and Regional Planning Undergraduate Program.

Learn more about Sidonia's practice here: https://www.airdberlis.com/people/bio/sidonia-j-tomasella

Chambers Review

Provided by Chambers

Chambers Canada Guide

Real Estate: Zoning/Land Use - Ontario

Band 4
Band 4

Individual Editorial

Sidonia Tomasella's clients benefit from her experience as a land use planner as she guides them through an array of land use matters, including redevelopments and appeals at the OLT.

Strengths

Provided by Chambers

  • She takes a proactive approach to servicing her clients and builds strong industry relationships.

    Real Estate: Zoning/Land UseChambers Canada Guide
  • Sidonia is an exceptional lawyer with a strong understanding of planning matters in the Toronto area.

    Real Estate: Zoning/Land UseChambers Canada Guide

Ranked Individuals at Aird & Berlis LLP (37)

Nationwide - Canada

Ontario

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