What most homeowner research skips is that those three approvals come from three different authorities, each running its own clock, and all three have to land in the same folder before a shovel goes in the ground. You can have your financing arranged and your drawings finished and still be months from breaking ground, waiting on a licence you had no reason to know you needed.
The build clock: four phases, no single countdown
Ask a builder how long it takes to build a custom home and the honest answer is “it depends on which phase you’re asking about.” Design and feasibility can run from a few weeks to several months depending on how settled your lot and program are. Financing and approvals move on regulatory timelines that are partly outside anyone’s control. Construction scales with size, complexity, and season. Closeout is fast once the work is actually done.
We call this sequence the build clock because each phase has its own pace, and treating the whole thing as one countdown is how homeowners end up disappointed by a number nobody actually promised them. No credible source publishes a single average “design to move-in” figure for Ontario, and any builder who quotes you one up front, before seeing your lot or your program, is guessing.
Phase 1: land, design and feasibility
Everything starts with the lot. Before a single drawing gets commissioned, confirm the property is zoned for what you want to build, that services (water, sewer, hydro) reach it, and whether a conservation authority has jurisdiction. In Burlington and Oakville, that often means Conservation Halton, since a meaningful share of lots near watercourses or floodplains fall under its review. Skipping this step is the single most common way a project loses months before construction has even been priced.
Once the lot is confirmed, you need a BCIN-qualified designer or an architect to produce Building Code compliant drawings. The Ontario Building Code requires permit drawings to be prepared by a qualified person, with narrow exemptions that don’t apply to most custom homes. This is also the point to set a real budget, before you fall in love with a floor plan the lot or the market can’t support.
If what you’re actually picturing is a smaller secondary structure rather than a full custom build, it’s worth reading how we assess a property’s ADU potential in Mississauga before committing to full custom-home drawings. It’s a much shorter process, and for some lots it’s the better fit. We work across Burlington, Oakville, and Mississauga, and the site constraints differ enough between them that this step genuinely can’t be skipped.
Phase 2: financing before you break ground
Most custom builds are financed with a construction, or progress-draw, mortgage. Funds are typically released in stages as inspected milestones are reached, such as foundation, enclosure, and interior finishing, though the exact stages and percentages are set by the lender, not by any fixed provincial rule (Forbes Advisor Canada). Treat any draw schedule you’re quoted as specific to that lender until you have it in writing.
Some owners use CMHC-insured financing instead. As of 2026, CMHC’s Improvement program can insure up to 95% of the as-improved value for an owner-occupied build of one or two units (90% for three to four units), subject to a $1.5 million property value cap and a standard 25-year amortization, and it requires new-home warranty coverage where available. Program terms and caps are subject to change, so confirm the current figures directly on cmhc-schl.gc.ca before you build a budget around them. One detail that trips people up: if you’re using CMHC-insured financing, pre-approval has to be in hand before construction starts, not applied for partway through.
None of this is a guarantee of approval or of specific terms. Financing is subject to lender and program qualification, and it’s worth having this conversation with a mortgage professional in parallel with, not after, your design work.
Phase 3: the three-approval gate
This is the part most process explainers get wrong, or at least incomplete. “Get a permit” is not the whole story. Legally, construction cannot start until all three of the following are in place, and they come from three separate authorities that don’t coordinate with each other on your behalf.
| Approval | Authority | What has to happen first |
|---|---|---|
| Building permit | Your municipality (Burlington, Oakville, Mississauga, etc.) | Complete drawings and application submitted; statutory review clock starts only once the application is complete |
| Builder licence | HCRA (Home Construction Regulatory Authority) | Your builder holds a valid licence under the New Home Construction Licensing Act, 2017, even when building on land you already own |
| Warranty enrolment | Tarion | Builder receives an Enrolment Confirmation through the Qualification for Enrolment process |
The permit. As of 2026, once a house application is complete, the Ontario Building Code sets a 10-business-day statutory review period, after which the municipality must issue the permit or refuse it with documented reasons. That clock only starts on a genuinely complete application; an incomplete submission or a needed zoning variance resets or pauses it. If the proposed home doesn’t comply with the current zoning by-law, the permit is withheld until a rezoning or minor variance is obtained. Confirm the current review timeline with your municipal building department rather than treating 10 days as a promise, because backlog and complexity vary by municipality and by project.
The HCRA licence. It is illegal to build or sell a new home in Ontario without a valid HCRA licence, and this catches people off guard: the requirement applies to the builder even when you, the homeowner, already own the lot. It is not only a rule for developers selling spec homes. As of 2026, HCRA’s average processing time for a fully complete new licence application is 8 weeks, and first-time applicants have to meet the competency requirements under section 38 of the Act and provide a criminal record and judicial matters check less than six months old. That 8-week figure is an average, not a guaranteed turnaround, and it applies to the builder’s licence status, not to your specific project timeline. Exact licensing fees change from time to time; check the current fee schedule directly with HCRA rather than relying on a number from a blog post, including this one.
Tarion enrolment. Separately again, a builder must receive Tarion’s Enrolment Confirmation through the Qualification for Enrolment process before construction of the home may begin. A permit in hand and a licensed builder are not enough on their own. This is a distinct, additional prerequisite, and it’s the piece most homeowner research skips entirely.
If you want to know what to ask a builder to confirm they’ve actually cleared this gate before, not after, they start work, we’ve laid that out in what to ask before hiring a custom home builder.
Phase 4: construction, foundation to move-in
Once all three approvals are confirmed, construction follows a fairly consistent sequence: footings and foundation, framing, rough-in plumbing, HVAC, and electrical, insulation and vapour barrier, drywall, then interior and exterior finishes. What varies is how long each stage takes on your specific project.
Mandatory Building Code inspections happen at each of these stages, and the Code puts a clock on the inspector, not just on you: once called, inspectors must inspect within 2 business days (5 business days for sewage systems). That’s a useful thing to know if a stage seems to be sitting idle; the inspection window is short by design.
We’re not going to hand you a single total construction-duration number here, because an honest one doesn’t exist as a general industry figure. Size, complexity, site conditions, trade availability, and the time of year you’re pouring foundation all move the number, and any builder who quotes you a fixed total before seeing your drawings is speaking from habit, not from your project.
Closeout, occupancy and your Tarion warranty
Once finishes are complete, the final Building Code inspection closes out the permit. From that point, your Tarion coverage runs on its own clock, starting on your date of possession rather than on the permit date. Tarion’s coverage has three tiers: one year for defects in work and materials and unauthorized substitutions, two years for water penetration and building envelope issues, exterior cladding defects, and Ontario Building Code health-and-safety violations, and seven years for major structural defects. Keep the paperwork; it’s what you’ll reference if something surfaces later.
Who’s actually on your team
A custom build touches more parties than most homeowners expect going in, and it’s worth knowing what each one does before you’re mid-project trying to figure out who to call:
- Your HCRA-licensed builder manages the drawings, the trades, the schedule, and the three-approval gate itself.
- A BCIN-qualified designer or architect produces the Building Code compliant drawings your permit application depends on.
- A mortgage broker or construction lender structures your progress-draw financing or CMHC-insured loan.
- Your municipal building department reviews and issues the permit, and conducts inspections through construction.
- A conservation authority, where your lot falls under one, reviews site constraints before permitting proceeds.
- Tarion, the statutory warranty administrator, confirms enrolment before construction and covers the home after possession.
None of these are competing with each other for your business; they’re each doing a distinct, non-substitutable job. A builder who tries to shortcut one of them (start framing before Tarion confirmation, for instance) is putting your legal position at risk, not saving you time.
Where EverOak fits
We’re HCRA-licensed, and we enrol every project with Tarion before construction starts, which means the three-approval gate isn’t a hurdle we’re introducing you to. It’s one we clear on our end before your first drawing is even final. What we can’t do from a blog post is give you a real timeline; that depends on your lot, your zoning, and your program. If you’re weighing a custom build in Burlington, Oakville, or Mississauga, or you’re comparing it against a full renovation of an existing property (our Oakville renovation timeline post is a useful read if you’re still deciding), get in touch and we’ll walk your specific lot through this process instead of guessing at it in the abstract.
