WEBROIBOIM
Paperwork isn’t glamorous, but it’s what keeps shovels moving, inspections on schedule, and budgets intact. Here’s a concise list of the most common permit and code mistakes we see in Ontario custom builds, followed by deeper guidance on the ones that derail projects most often.
The Quick List of Common Permit Mistakes in Ontario
- Submitting an incomplete permit package (missing drawings, forms, reports)
- Assuming the clock starts before the application is deemed complete
- Skipping Tarion enrolment or HCRA licensing steps for new homes
- Missing energy compliance documentation (OBC SB-12 for Part 9 housing)
- Overlooking Conservation Authority permits (shorelines, flood hazards, wetlands)
- Forgetting on-site sewage (septic) approvals under OBC Part 8
- Needing but not planning for a Committee of Adjustment minor variance
- Missing heritage approvals where required
- Using the wrong review stream (or ignoring House/Express streams where available)
1. Incomplete Permit Packages (the Top Avoidable Delay)
Across large Ontario municipalities, reviewers regularly flag missing items at intake. This includes everything from truss layouts and energy forms to septic calculations. Toronto audits have noted a significant share of applications missing documentation at submission and many others exceeding service-level timelines, a clear sign that gaps at intake ripple through the process.
“The clock hasn’t started yet”: Complete vs. Incomplete Applications
Most service standards apply only once an application is deemed complete. Many homeowners assume the review timeline starts on upload; it doesn’t. Municipalities also sort projects into review streams (for example, House or Express) with different expectations and pathways. Picking the wrong lane or submitting without the required pieces adds weeks.
Skipping Tarion Enrolment and HCRA Licensing: Legal Prerequisites for New Homes
In Ontario, anyone building or selling a new home must be licensed by the HCRA and enroll the home with Tarion, which administers the statutory new-home warranty. Starting construction without these steps can halt inspections and occupancy until compliance is in place.
Energy Compliance Paperwork (SB-12) Missing or Late
For low-rise houses under OBC Part 9, energy efficiency must comply with Supplementary Standard SB-12 through either a prescriptive package or performance modelling. Submitting drawings without the chosen compliance path and supporting details triggers review comments and resubmissions that slow the queue.
Conservation Authority Triggers: Not Realizing Hazard Rules Still Apply
Regulatory changes have standardized hazard regulations, but shoreline, flood, and erosion hazards still carry specific setbacks and allowances. If a design proceeds without screening the lot against current Conservation Authority mapping, it may become clear late in the process that a CA permit is required, introducing extra sign-offs and time.
Not Knowing Septic (On-site Sewage) Permits Are a Separate Process with Separate Timelines
Where a project relies on a private on-site sewage system, approvals fall under OBC Part 8 and are often administered by local public health units or Conservation Authorities. Treating septic as a simple drawing add-on leads to redesigns and resubmissions when soil, capacity, or setback requirements aren’t documented up front.
Not Planning for Minor Variances (Committee of Adjustment)
When a design doesn’t fully meet zoning—height, coverage, setbacks—a minor variance through the Committee of Adjustment is required. This is a quasi-judicial process with filing requirements, notice periods, and hearing dates, and the building permit generally waits on the outcome.
Missing Heritage Approvals
Work on designated properties or within Heritage Conservation Districts may require a Heritage Permit in addition to the Building Permit. Packages need plans and conservation details that show compliance with the Ontario Heritage Act and local guidelines. Submitting for a building permit without heritage clearance stalls reviews.
Not Proofreading All the Paperwork
Even when the technical work is correct, format and process can still trip people up: wrong file types, missing digital signatures, or resubmitting through the wrong channel. Municipalities require electronic submissions with specific naming and delivery methods; ignoring those rules leads to do-overs and lost time.
Conclusion: These Tips Can Save You Weeks
Permitting is a process problem, not a paperwork problem. Assemble a complete, coordinated package, confirm which approvals run in parallel, and choose the correct review stream. Projects that get these basics right move faster and avoid the resubmission spiral that costs both time and money.
Ready to Build Without Permit Headaches?
Book a consultation with Tucker Homes. We’ll review your plans against municipal checklists, confirm Tarion/HCRA requirements, screen Conservation Authority and septic triggers, and map a clear path to permit, so your project stays on schedule!
