When you buy a home, you expect to know what you’re getting. Discovering unpermitted work completed by a previous owner shouldn’t come as a surpsise—but it happens more often than most people realize.
Whether it’s a finished basement, a structural wall removed to create an open-concept layout, a garage conversion, an addition, or a second dwelling unit, municipalities across Ontario regularly discover unpermitted construction years after the work was completed.
One of the first questions homeowners ask is:
“Am I responsible for work I didn’t do?”
The short answer is yes. In Ontario, responsibility for resolving unpermitted construction typically follows the property—not the person who originally completed the work.
The good news is that receiving an Order to Comply or discovering unauthorized work doesn’t necessarily mean you’ll have to remove everything. Most situations can be resolved with the right strategy, proper documentation, and a clear understanding of the municipal approval process.
Does Liability Transfer to the New Property Owner?
In Ontario, municipalities enforce the Building Code Act to ensure buildings are safe and comply with current regulations.
When unauthorized construction is discovered, the municipality’s concern is bringing the property into compliance—not determining who originally performed the work.
That means if you purchased a property with unpermitted renovations, you may still be required to:
- Obtain the necessary building permits
- Demonstrate that the construction complies with the Ontario Building Code
- Complete additional inspections
- Make corrective repairs if deficiencies are found
- Remove work that cannot be brought into compliance
While this can feel unfair, it’s important to remember that municipalities are focused on public safety and the condition of the property itself.
How Is Unpermitted Work Usually Discovered?
Many homeowners assume that if work has existed for years, it will never become an issue.
In reality, unpermitted work is often discovered during completely unrelated situations, including:
- Applying for a renovation permit
- Building an addition
- Selling the property
- Refinancing with a lender
- Property inspections
- Municipal by-law investigations
- Complaints from neighbours
- Fire or insurance investigations
It’s common for homeowners to live in a property for several years before learning that previous renovations were never approved.
What Happens If You Receive an Order to Comply?
An Order to Comply is a formal notice issued by a municipality requiring the property owner to correct Building Code violations within a specified timeframe.
Although receiving one can be stressful, it doesn’t automatically mean demolition is required.
Most Orders involve one or more of the following:
- Applying for a retroactive building permit
- Providing engineering reports
- Opening walls or ceilings for inspection
- Correcting Building Code deficiencies
- Scheduling municipal inspections
- Providing additional documentation
Every municipality has its own procedures, but the overall goal remains the same: verify that the work is safe and meets Ontario’s Building Code requirements.
Can Previous Owners Still Be Held Responsible?
In some cases, previous owners or contractors may have legal responsibility under purchase agreements, warranties, or civil claims.
However, those are separate legal matters between private parties.
From the municipality’s perspective, the current registered property owner is generally responsible for resolving the outstanding Building Code issues.
If you believe the previous owner failed to disclose unauthorized work during the sale, it’s worth discussing your situation with a real estate lawyer. Depending on the circumstances, there may be legal options available to recover some of your costs.
That legal process, however, does not usually stop the municipality from requiring compliance.
What If You Didn’t Know About the Unpermitted Work?
This is one of the most common situations we see.
Many homeowners purchase properties believing everything was completed properly because:
- The renovations looked professionally finished.
- Home inspection reports didn’t identify permit issues.
- Real estate listings advertised finished living space.
- The previous owner never mentioned permits.
Unfortunately, lack of knowledge doesn’t usually remove the obligation to comply with municipal requirements.
The important thing is to act once the issue is identified. Delaying the process can make resolution more difficult and may lead to additional enforcement measures.
Is Demolition Always Required?
Fortunately, no.
Many homeowners assume an Order to Comply means tearing everything out.
In reality, municipalities generally prefer bringing existing work into compliance whenever possible.
Depending on the situation, this may involve:
- Limited exploratory openings
- Structural engineering reviews
- Fire separation upgrades
- Electrical or plumbing corrections
- Additional insulation or ventilation improvements
- Obtaining the appropriate permits and inspections
Every property is different, which is why it’s important to evaluate the existing construction before deciding on the best course of action.
How Can You Resolve Unpermitted Work?
Successfully resolving an Order to Comply usually follows a structured process.
1. Understand the Municipality’s Requirements
Carefully review the Order to Comply and identify exactly what the municipality requires.
2. Assess the Existing Construction
Determine what work was completed, whether documentation exists, and what portions may need to be exposed for inspection.
3. Prepare the Required Drawings and Reports
Municipalities often require architectural drawings, engineering reports, surveys, or other supporting documents before permits can be issued.
4. Submit the Appropriate Permit Applications
Retroactive permits can often be obtained, depending on the type of work completed.
5. Complete Required Corrections
If inspectors identify Building Code deficiencies, these must be corrected before final approval.
6. Obtain Final Municipal Approval
Once inspections are complete and all deficiencies have been addressed, the municipality can close the file and the property returns to compliance.
Why Professional Guidance Matters
Resolving unpermitted construction isn’t just about filling out permit applications.
It requires understanding:
- Ontario Building Code requirements
- Municipal review processes
- Construction methods
- Architectural documentation
- Engineering requirements
- Inspection sequencing
Approaching the process strategically can often reduce delays, avoid unnecessary work, and provide a much clearer path toward compliance.
Most importantly, it gives homeowners confidence that they’re addressing the issue correctly the first time.
Don’t Panic—Most Orders to Comply Can Be Resolved
Finding out that a previous owner completed work without permits can feel overwhelming, especially when you’ve done nothing wrong.
The key is not to ignore the issue.
Most Orders to Comply can be resolved through the proper permitting process, qualified documentation, and coordination with your municipality. The sooner you begin, the more options you typically have.
Speak With OTC Resolved
If you’ve received an Order to Comply or recently discovered unpermitted work completed by a previous owner, we’re here to help.
At OTC Resolved, we help homeowners across Ontario resolve building permit issues, unauthorized construction, and municipal compliance matters. As architects, builders, and developers, we understand both the technical requirements and the practical realities of bringing existing construction into compliance.
Book a consultation today and let us review your situation, explain your options, and develop a clear plan to help resolve your Order to Comply with confidence.