Heritage Properties: Listed vs. Designated
Eric Rodrigues, OAA, LEED AP BD+C, CAHP
Ontario’s diverse landscapes boast a rich tapestry of historical buildings, from grand Victorian estates to charming Main Street shops. As development continues across the province, it’s crucial to strike a balance between progress and heritage preservation. Two key terms you’ll encounter in this context are “listed” and “designated” heritage properties.Â
But what’s the difference between them for property owners and architects like Boldera Architects?
Listed: Recognized Potential for Preservation
A listed property is identified by a municipality (city, town, township) as having potential cultural heritage value. Inclusion on the municipal Heritage Register is a preliminary step. It flags the property for further evaluation if demolition is proposed. Listing offers several benefits:
- Recognition: It acknowledges the property’s architectural and historical significance.
- Public Awareness: It raises awareness of the property’s heritage value among the community.
- Early Engagement: If development plans arise, it encourages early consultation with municipal heritage preservation specialists.
Bill 23 has introduced some significant changes for listed heritage properties in Ontario, and the impacts are generally considered negative for heritage conservation efforts. Here’s a breakdown of the key points:
Reduced Protections for Listed Properties:
- Shorter Timeframe:Â Previously, listed properties had indefinite status. Bill 23 introduces a two-year window for municipalities to decide whether to designate a listed property. If not designated within that timeframe, the property is removed from the heritage register and loses any associated protections.
- Stricter Designation Criteria:Â Bill 23 makes it more difficult for municipalities to designate properties, potentially leading to fewer listings being upgraded to designated status.
- Delisting and Relisting Challenges:Â Properties removed from the register due to Bill 23 cannot be re-listed for another five years. This creates a significant gap in protections and makes it harder to identify and preserve historically valuable buildings.
Overall Impact:
- Loss of Heritage Properties:Â Heritage advocates fear that many listed properties will be demolished or significantly altered due to the reduced protections and stricter designation criteria.
- Increased Development Pressure:Â The streamlining of the designation process might incentivize development on heritage properties with less community input and oversight.
- Uncertain Future for Heritage Conservation:Â Bill 23’s focus on streamlining development raises concerns about the long-term commitment to heritage preservation in Ontario.
It’s important to note that Bill 23 is a complex piece of legislation, and the specific impacts may vary depending on the municipality. Some municipalities with strong heritage conservation programs may be able to mitigate some of the negative effects

Ontario boasts numerous significant heritage buildings worthy of designation. However, Bill 23 introduces a deadline for municipalities to designate these properties, raising concerns about the future of heritage preservation.
Designated: Strong Legal Protection for Heritage Character
Heritage designation, authorized by the Ontario Heritage Act, provides a property with significant legal protection. Here’s how it differs from being listed:
Legal Safeguards: Designation restricts alterations or demolition without approval from the municipal council. This ensures the property’s heritage features are preserved.
Two Designation Categories: There are two types of designations under the Ontario Heritage Act:
- Part IV: Applies to individual properties with exceptional heritage value.
- Part V: Protects groups of buildings within Heritage Conservation Districts (HCDs), maintaining a cohesive historical streetscape.

Designated building are protected under the Ontario Heritage Act and protected from demolition and extensive alteration.
Benefits for Property Owners
Heritage designation presents both challenges and opportunities. Boldera Architects can help you navigate these complexities across Ontario. Here are some potential benefits:
- Financial Incentives: Heritage property owners may qualify for grants and tax breaks offered by various levels of government to assist with restoration and maintenance.
- Adaptive Reuse: Boldera Architects can creatively convert heritage buildings into modern functional spaces while respecting their character.
- Increased Value: Heritage properties can hold a premium value due to their unique character and scarcity.
Understanding the Designation Process
If you suspect your property may have heritage value, or if you’re considering acquiring a heritage property, Boldera Architects can advise you on the designation process, which varies depending on the municipality. We can also help you explore development options that respect the property’s heritage character.
Conclusion
Whether your property is listed or designated, understanding heritage considerations is crucial for responsible development in Ontario. Boldera Architects is committed to finding creative solutions that balance heritage preservation with your architectural vision.
I hope this article has helped you with your planning. If you have questions, book a free 30-minutes Discovery Session with Boldera Architecture. This will unlock the full potential of your project and help you develop a quick action plan. My goal is to help you develop successful projects.