About Montagnese and Sherr LLP

Montagnese and Sherr LLP is a small law firm based in Toronto, operating from Suite 703 on Islington Avenue. Partners Katherine Montagnese and David Sherr serve clients across the Greater Toronto Area, and the firm concentrates on three areas: family law, wills and estate planning, and real estate law.

Katherine Montagnese practices across all three areas, handling separation agreements and parenting arrangements alongside residential closings and personalized estate plans. Montagnese has appeared before the Superior Court of Justice, the Ontario Court of Justice, and the Ontario Court of Appeal, and also assists clients with mediation and arbitration. David Sherr focuses on family law and has practiced in the field since being called to the bar in 2012, appearing before the Ontario Court of Justice, Superior Court of Justice, Divisional Court, and Court of Appeal, along with private arbitrations. The firm's real estate practice offers flat rate pricing for most residential purchases, sales, and refinances, and its estate planning work extends to specialized tools such as Henson trusts for beneficiaries with disabilities.

Fees & payment

A clock beside gold coins with a dollar signHourly

This firm’s lawyers at a glance

Called to the bar
2012 · median 14 years in practice 1 of 2 lawyers

The neighbourhood

The office sits at 1243 Islington Avenue in a commercial building that stands directly across the street from Islington subway station at Islington and Bloor. An underground walkway connects the building to the subway platform, with further connections to GO Transit and Mississauga's Mi Way buses, so clients travelling from across west Toronto and Mississauga can reach the office without a car.

Frequently asked questions

I'm going through a separation in Toronto. Can Montagnese and Sherr LLP help me with a separation agreement?
Yes. The firm handles domestic contracts including separation agreements, cohabitation agreements, and marriage contracts, along with parenting and property issues that come up when a relationship ends.
I'm buying a condo in the GTA. Does the firm handle condo purchases and closings?
Yes. The real estate practice covers residential purchases, sales, mortgage and refinance transactions, condominium purchases, and title work, and it offers flat rate pricing for most residential transactions.
Can Montagnese and Sherr LLP set up a trust for a family member with a disability?
The firm's estate planning work includes Henson trusts, which are designed for beneficiaries with disabilities, alongside standard wills, powers of attorney, and corporate wills.
What courts do the lawyers at the firm appear before?
Katherine Montagnese and David Sherr have each appeared before the Ontario Court of Justice and the Superior Court of Justice. Montagnese has also appeared before the Ontario Court of Appeal, and Sherr before the Divisional Court and Court of Appeal, along with private arbitrations.
Does the firm only handle family law, or does it do real estate and wills too?
All three. Montagnese and Sherr LLP is organized around family law, wills and estate planning, and real estate law, and clients can bring matters in any of those areas to the same firm.
Where is the office and how do I reach it?
The firm is at Suite 703, 1243 Islington Avenue in Toronto. It's reachable by phone, email, or the booking link on its site, with office hours Monday to Friday, 9 a.m. to 5 p.m.

Where to find them

Suite 703, 1243 Islington Avenue, Toronto, ON M8X 1Y9 · 437-567-6221

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Listing compiled from the firm’s public website in August 2026. Verify licence status in the Law Society of Ontario directory ↗