Assessment Review Board Representation Lawyers Ontario

When the Municipal Property Assessment Corporation (MPAC) overvalues or misclassifies your property, your best recourse is an appeal to the Assessment Review Board (ARB).

NextGenLaw provides strategic legal representation for businesses, non-profits, and property owners confronting high-stakes disputes before this independent tribunal. With decades of litigation experience and an intricate knowledge of Ontario’s Assessment Act, our lawyers aggressively advocate to correct assessment errors and protect your organization’s financial interests.

Call Our Office: (613) 294-1156

The Role of the Assessment Review Board (ARB) in Ontario

The Assessment Review Board is a provincial tribunal established to resolve disputes regarding property classifications and taxation.

When MPAC issues a Property Assessment Notice, it determines the Current Value Assessment (CVA) and the property’s tax classification. Because municipal property taxes are calculated based on these two factors, an error by MPAC can result in thousands, potentially even millions, of dollars in unjust tax liabilities.

If a property owner disagrees with MPAC’s valuation or classification, they have the right to challenge it. However, the ARB does not proactively investigate cases; it relies on a formal, adversarial process in which the taxpayer has the burden of demonstrating that MPAC’s assessment is incorrect.

Scope of Our Assessment Review Board Practice

NextGenLaw’s lawyers represent clients across a wide spectrum of property tax and assessment disputes before the ARB, including:

Current Value Assessment (CVA) Disputes

Challenging MPAC’s valuation of commercial, industrial, residential, or special-purpose properties when the assessed value exceeds the actual market value.

Classification Appeals

Fighting incorrect property classifications (for example, a property being taxed at a high commercial rate instead of a lower residential, farm, or non-profit rate).

Tax Exemption Denials

Advocating for charitable, religious, and non-profit organizations that have been wrongly denied their tax-exempt status under Section 3 of the Assessment Act.

Supplementary and Omitted Assessments

Appealing retroactive assessments issued by MPAC for new construction, renovations, or unassessed improvements.

Farm and Managed Forest Disputes

Resolving disagreements regarding eligibility for the Farm Property Class Tax Rate Program or the Managed Forest Tax Incentive Program.

The ARB Appeal Process Explained

Success at the ARB requires strict adherence to procedural rules and deadlines. A typical ARB dispute involves several critical phases:

1. Request for Reconsideration (RfR)

For most property types, owners must first file an RfR with MPAC before appealing to the ARB. The deadline is strictly enforced (typically March 31 of the taxation year).

2. Filing the ARB Appeal

If MPAC denies the RfR, or if you own a commercial/industrial property that bypasses the RfR stage, a formal appeal must be filed with the ARB within 90 days.

3. Mandatory Meetings and Discovery

The ARB process requires the exchange of evidence and mandatory meetings between the taxpayer’s legal counsel, MPAC representatives, and the municipality.

4. Settlement Conferences

Many ARB appeals are resolved through mediated settlement conferences, where our lawyers negotiate directly with MPAC to secure a favorable reduction or reclassification without a formal hearing.

5. The Hearing

If a settlement cannot be reached, the case proceeds to a formal hearing. This functions similarly to a civil trial, involving expert witnesses, cross-examinations, and legal submissions.

Why You Need an Assessment Review Board Lawyer

Representing yourself or your organization before the ARB is highly risky. The tribunal operates under complex Rules of Practice and Procedure. Retaining an experienced ARB lawyer is essential for several reasons:

You Face the Burden of Proof

At the ARB, MPAC’s assessment is presumed correct until proven otherwise. You must build a compelling, evidence-based case to overturn their decision.

ARB Hearings Enforce Strict Evidentiary Standards

ARB hearings require formal disclosure of documents and strict adherence to the rules of evidence. A lawyer ensures your evidence is admissible and strategically deployed.

Cases Often Rely on Expert Witnesses

Winning a CVA dispute almost always requires testimony from specialized real estate appraisers or land use planners. NextGenLaw routinely works with industry-leading experts to dismantle MPAC’s valuation models.

Land Owners Must Navigate Complex Legislation

Property tax law involves a web of overlapping statutes, including the Assessment Act and the Municipal Act. Our ARB lawyers harness legislation alongside precedent-setting case law to your advantage

Our ARB Representation Services

NextGenLaw provides comprehensive, end-to-end representation for ARB appeals. We manage the heavy lifting so our clients can focus on their businesses and operations.

Case Viability Evaluation

We conduct an initial review of your MPAC assessment, property data, and market comparables to determine if an appeal is financially and legally viable.

Drafting and Filing

Our team carefully and meticulously drafts and files all RfRs and ARB appeals ahead of statutory deadlines.

Expert Witness Coordination

We retain and collaborate with top-tier appraisers and industry experts to build an unassailable evidentiary foundation for your case.

Tribunal Advocacy

Our lawyers provide aggressive, strategic representation during mandatory meetings, settlement negotiations, and formal ARB hearings.

Why Clients Choose NextGenLaw for ARB Appeals

Insider Perspective from Former ARB Adjudicators

Unlike most firms, our legal team has adjudicated and mediated the very disputes you are facing. NextGenLaw co-founders Joe Jebreen and Scott McAnsh bring unparalleled insider knowledge to your appeal.

Scott McAnsh previously served as a Vice-Chair of the Ontario Assessment Review Board, where he helped design and implement the Board’s current appeal process and authored many of the province’s leading assessment law decisions. Joe Jebreen is a former bilingual member of the ARB, bringing extensive experience in adjudicating and mediating complex assessment disputes in both official languages.

Because Joe and Scott know exactly how the tribunal evaluates evidence and makes decisions from the other side of the bench, they are uniquely equipped to craft legal strategies that directly meet the ARB’s strict standards for success.

History in Defining Ontario Property Tax Law

NextGenLaw successfully represented Stamford Kiwanis Non-Profit Homes Inc. in the landmark Court of Appeal Case, Stamford Kiwanis Non-Profit Homes Inc. v. Municipal Property Assessment Corporation, 2025 ONCA 450. Our success in winning ARB disputes in the highest courts in Ontario demonstrates our capacity to secure the right outcome for our clients.

A Track Record of Results Against MPAC

We know how MPAC builds its cases, how its assessors defend their valuations, and where their methodologies are vulnerable. We leverage this insight to negotiate highly favorable settlements or win decisive victories at tribunal hearings.

Strategic Representation

We recognize that prolonged litigation is not always in a client’s best interest. We prioritize strategic negotiations and settlement conferences to resolve ARB disputes efficiently, taking cases to a full hearing only when it is necessary to protect your financial interests.

Book a Consultation with Experienced Assessment Review Board Lawyers

After filing a Request for Reconsideration, you have 90 days from the mailing date of the decision letter to file your appeal with the Assessment Review Board. Our team can review your assessment, explain the ARB process, and build a strategy to support your organization. Contact NextGenLaw today to schedule your consultation.