Cassels Stayed in One City for 124 Years. Then Its Clients Wrote the Expansion Plan.

The first interesting thing Cassels Brock & Blackwell ever did with geography was almost nothing. Founded in October 1888, the law firm spent 124 years in Toronto, always within roughly a kilometre of King and Bay - Canada’s most expensive little crossroads of banking, capital, and dark suits. Then, in 2012, it opened in Vancouver. Less a triumphant coast-to-coast march than a response to clients already waiting there, the move explains the firm better than any slogan.

Cassels is a business law partnership. Its inventory walks out of the elevator every evening: lawyers who structure acquisitions, finance mines, argue class actions, register trademarks, steer projects through regulatory hearings, and translate Canadian rules for international companies. It serves start-ups and multinationals, banks and borrowers, private-equity funds and founders, governments and Indigenous groups, universities, real-estate developers, franchisors, entertainers, and companies whose problem has become too consequential for a template.

The firm’s broad menu can look familiar. Its sharper identity appears one level down, in areas where law and industry jargon become inseparable. Cassels has built conspicuous practices in mining, franchising, Aboriginal law, entertainment and intellectual property, cannabis, capital markets, restructuring, and mid-market M&A. In those businesses, a lawyer cannot merely know the statute. The lawyer must understand the financing cycle, regulator, counterparties, technical risks, and what makes a board nervous at 11:47 p.m.

The product is the team

There is no Cassels app to download. The product is a coordinated answer. An acquisition may call for corporate, tax, competition, finance, employment, IP, real estate, and regulatory lawyers. A mine adds Indigenous consultation, environmental approvals, project finance, and securities work. An entertainment dispute may move from rights clearance to royalty economics to a Federal Court hearing. Cassels sells the ability to assemble those specialties without making the client conduct the orchestra.

That is also the business model. The partnership earns professional fees on transactions, disputes, projects, and continuing advisory relationships. Rates and matter budgets are negotiated, not displayed like software tiers. The cost therefore follows complexity, urgency, team composition, and risk. For a client, the economic promise is not “cheap law.” It is fewer expensive surprises, a transaction that closes, an approval that survives scrutiny, or a dispute resolved before it consumes the enterprise.

In professional services, scale is not cloning judgment. It is making the right judgment easier to assemble.

This puts Cassels in the crowded Canadian national-firm market alongside Osler, Stikeman Elliott, McCarthy Tétrault, Fasken, Bennett Jones, Torys, Davies, and the similarly named but entirely separate Blake, Cassels & Graydon. Specialist boutiques can be more focused; global firms can bring a larger international footprint. Cassels’ pitch sits between them: a Canadian platform with enough breadth for the whole matter and enough sector concentration to sound like an insider.

Clients drew the first new dot

The Vancouver decision is the cleanest example. By 2011, Cassels already represented a growing western client and contact base, particularly in mining. Management had considered other offices before but had not found what it called a strategic imperative. Now clients were enthusiastic, the work was portable, and a permanent local presence could accelerate opportunities already visible from Toronto.

What failed first was not an office. It was the old argument for staying put. History, partnership procedure, and the difficulty of transplanting culture mattered less once clients made the commercial case obvious. Management presented the idea at a town hall; under four months later, partners approved the first office beyond downtown Toronto. Cassels secured room to expand even before the first Vancouver lawyer arrived.

The move worked because it was demand-led, not because geographic expansion is automatically wise. A service firm without portable clients, a distinctive practice, respected local hires, patient capital, or partner alignment can create an expensive outpost that merely relocates overhead. Cassels had a dense mining network and lawyers who could bridge offices. Without those conditions, copying the map would be cosplay.

Then the office learned to bend

A decade later, the institution changed shape again. Cassels decided in 2019 to leave the Scotiabank Plaza home it had occupied for 35 years. The pandemic arrived between decision and move, turning what might have been a conventional relocation into a live experiment about hybrid work. In May 2023, about 520 Toronto lawyers and staff moved into five floors and 130,000 square feet at 40 Temperance Street.

The old law-firm status map put senior partners in larger exterior offices and everyone else farther from the windows. Cassels and Gensler replaced it with universal offices and more equitable daylight. Twenty percent of seating is unassigned. A modular system can adjust furniture and partitions within 48 hours. The space includes shared cafés and meeting areas, plus a 4,500-square-foot wellness centre and rooms for lactation, family needs, and religious observance.

What changed their minds was evidence. The lease decision predated COVID-19; the operating design absorbed what the firm learned during it. Flexibility stopped being a fashionable noun and became walls that could actually move. The most reusable insight is not to install the same chairs. It is to delay permanence. Design the office, team structure, and technology around several plausible futures, because the forecast will be wrong in ways no committee can minute in advance.

Depth before distance

Cassels’ market position is easiest to see in its proof points. Chambers Canada’s 2026 guide listed 26 ranked departments and 72 ranked individuals. The firm reported top-tier recognition in Aboriginal law, cannabis, franchising, media and entertainment, and mining. Best Law Firms in Canada ranked it across 35 areas. In 2025, Cassels said league tables placed it first among comparable Canadian national firms in several deal-count and deal-value categories.

The work behind those badges is concrete. In 2025, Cassels represented the underwriters on an approximately C$678.5 million private placement tied to Hemlo Mining’s acquisition of the Hemlo Gold Mine. Its IP team points to seven copyright appeals at the Supreme Court of Canada. The regulatory practice says it has handled more than 100 processes across Canada in recent years. Each example reinforces the same positioning: complicated Canadian work where finance, policy, and sector knowledge overlap.

Culture is harder to audit from the outside, but the firm has made visible commitments. It operates affinity groups and student programs, highlights a long history of women breaking barriers, and supports pro bono and community work. In 2026 it joined Classroom Champions to back athlete-mentored education and partnered with University of Toronto Press on a C$10,000 student prize for class-action scholarship. Eleven lawyers entered the partnership at the start of that year across all three offices.

Where the playbook breaks

Cassels is not a disruption story. It is more useful than that. The firm did not discard the partnership model, replace lawyers with software, or pretend 138 years of institutional habit could be sprinted away. It grew by noticing when facts had outlived assumptions: Toronto was no longer the only place its clients needed it; the largest office no longer had to signal seniority; a national firm could be broad without being bland.

For clients, the practical offer is straightforward. Bring Cassels the transaction that crosses practice boundaries, the regulated project with too many stakeholders, the Canadian market entry, the financing that needs sector fluency, or the dispute that cannot be separated from business strategy. For builders of expert firms, the lesson is quieter: earn the right to expand before you announce the expansion. Sometimes the best growth plan is already hiding in the work you keep being asked to do.