Planning a new custom home in Toronto? You’ll need a building permit before you start work. The short version: confirm zoning, prepare BCIN‑stamped drawings, submit online with the right forms and fees, respond to City comments, then book inspections after issuance. We’ll walk you through the exact steps, current City fees, and the common detours to avoid.
If you want a team that handles drawings and permits end‑to‑end, partner with a custom home builder in Toronto to streamline approvals and construction.
What A Toronto Building Permit Is (And When You Need One)
A building permit is the City’s formal approval that your plans comply with the Ontario Building Code, zoning by‑laws, and other applicable laws. It gives you permission to begin work. For a new detached, semi, or row house, a permit is required under the Building Code Act.
Quick guide (for typical single‑family projects):
- Yes, you need a permit: New house construction; additions; structural changes; basement underpinning; new openings for doors or windows. This is all outlined on Toronto’s “When Do I Need a Building Permit” page.
- Usually (check specifics): Secondary suites, walkouts, major mechanical changes tied to the build.
- No (still follow zoning): Purely cosmetic updates like painting or flooring that don’t change structure or life‑safety systems.
Bottom line: the permit is about safety and compliance. It also triggers mandatory inspections at key stages to keep the build on track.
The Permit Path For A New House (Toronto)
Getting the permit is a predictable process if you sequence it right. Here’s the proven path we follow on custom homes across the city.
Step 1 – Confirm Zoning And Site Constraints
Start by checking your lot’s zoning and standards: height, setbacks, lot coverage, parking, and limiting distance rules. Toronto’s harmonized Zoning By‑law 569‑2013 sets these limits and they drive massing, window placements, and grading. If your concept fits “as‑of‑right,” you’ll avoid variances later. Toronto
Step 2 – Decide Your Delivery Model
Choose who leads: a design‑build firm or a separate architect plus builder. With design‑build, you keep decisions, drawings, budgeting, and permit coordination under one roof. Contempo handles BCIN‑qualified drawings and permit management in‑house. That reduces hand‑offs, shortens review cycles, and protects your budget.
Step 3 – Prepare Permit‑Ready Drawings And Documents
For a new house permit, the City expects a complete, coordinated set. At a minimum: architectural drawings, structural details, site plan with zoning summary, lot grading plan, energy compliance (SB‑12), and required forms. The City’s “New House” application guide lists what to include and how to format PDF submissions.
Who Does What (At A Glance)
| Document / Item | Who Prepares | When Needed |
| Current Survey & Site Plan | Ontario Land Surveyor + Designer | Always for a new house; confirm property lines/easements. |
| Lot Grading Plan | Civil Engineer | Always; must align with Lot Grading Criteria for Infill Housing. |
| Architectural & Structural Drawings | BCIN Designer / Architect / Engineer | Always; signed and dated per City requirements. |
| Energy Efficiency (SB‑12) | Designer / Energy Consultant | For Part 9 homes to show Code compliance. |
| Tree Declaration | Owner/Agent + Arborist input | If there’s potential impact to regulated trees. |
Step 4 – Submit Online And Pay Application Fees
Toronto accepts new‑house permit applications online. You’ll bundle the forms, drawings, and supporting documents in PDF, then submit through the City’s portal or by email as directed on the guide page. The City’s instructions cover file formats, forms, and associated plumbing/HVAC submissions. Toronto
Here’s the catch: to be treated as a complete application in the House Stream, you need an issued Zoning Applicable Law Certificate (ZAP) attached to the package. Applications without a ZAP are incomplete and don’t get a review time frame.
Step 5 – Plan Review And Responses
Once intake accepts your package, zoning and Building Code examiners review it. Expect comments; respond with clear mark‑ups and revised pages. The City publishes the review workflow so you know who is looking at what and when.
For House Stream submissions, complete applications target a 10‑business‑day review window. Complexity, workload, and re‑submissions determine the real timeline. Clean, coordinated drawings move fastest. Toronto
Step 6 – Permit Issuance And Mandatory Inspections
After issuance, post your permit card and schedule inspections at required milestones: footings, foundations, structural framing, insulation/vapour barrier, services, and final. Book inspections online; the City outlines the exact trigger points for small buildings. We coordinate all inspection bookings and close‑outs for you.
What A New‑Home Building Permit Costs In Toronto (2025)
Toronto uses a per‑square‑metre Service Index plus a per‑unit fee. For single‑family dwellings, semis, townhouses, and duplexes, the 2025 Service Index is $17.85/m², plus $54.16 per new residential unit. The City also charges a Zoning Applicable Law Certificate fee for a new house of $619.60. These are municipal permit‑related fees only. To get a better idea, check out Toronto’s page covering all the building permit fees.
Worked example (300 m² new build):
- Area fee: 300 × $17.85 = $5,355.00
- Unit fee: $54.16
- Zoning Applicable Law Certificate: $619.60
- Illustrative total: $6,028.76 (excludes surveys, engineering, tree permits, development charges, and any other City or utility fees).
Development charges are separate from building permit fees. The City collects DCs to help pay for infrastructure tied to growth; separate rate tables apply and policies may change. We’ll advise if your project triggers DCs and coordinate timing.
How To Avoid Detours Like The Committee Of Adjustment
Design inside the zoning envelope to stay “as‑of‑right.” Most delays happen when a design needs minor variances for height, coverage, or setbacks. If you can avoid variances, you avoid Committee of Adjustment hearings and associated costs.
If you do need a variance or consent, understand how the Committee works and what they evaluate. It’s a quasi‑judicial body that decides on minor variances and consents using tests set out under the Planning Act. We’ll prepare drawings, rationale, and any expert input if your project requires this path.
FAQs
Do I Need A Permit To Build A New Detached House In Toronto?
Yes. New houses require a building permit under the Building Code Act, with plans reviewed for Code and zoning compliance.
How Long Does The City’s Review Take For A New House?
Complete “House Stream” applications target 10 business days. Missing documents or the lack of a Zoning Applicable Law Certificate makes an application incomplete and removes timing commitments.
Which Drawings And Forms Are Mandatory?
Expect a full set: site plan with zoning summary, lot grading, architectural and structural drawings, energy (SB‑12), and City forms (Application to Construct, Schedule 1, and others listed in the guide).
Can My Builder Or Designer Apply On My Behalf?
Yes. The owner can authorize an agent to submit and correspond with the City. We handle submission and all responses during review.
What Inspections Will The City Require?
Typical stages for small residential buildings include footings, foundations, framing, insulation/vapour barrier, service rough‑ins, and final occupancy. Book through Toronto’s inspection portal.
How Are Building Permit Fees Calculated?
Fees use a Service Index per m² plus a per‑unit charge; for houses in 2025 that’s $17.85/m² + $54.16/unit. A separate ZAP fee of $619.60 applies to new houses.
What If My Design Needs A Small Variance?
You’ll apply to the Committee of Adjustment for a minor variance or consent. We try to design “as‑of‑right” to avoid hearings.
What We Handle For You (So Permits Don’t Slow The Build)
We handle BCIN permit drawings in‑house and stamp what we design. That means fewer hand‑offs and faster revisions. Our design‑first process sets a clear budget before we lock drawings.
During approvals, we manage the ZAP, submit the permit, respond to City comments, and coordinate surveyors, engineers, and arborists. Your client portal gives you 24/7 access, daily logs, and progress photos. A dedicated project manager keeps everything moving.
On the build, we run a fixed‑price contract with a 2‑year warranty on materials and labour, backed by membership in BILD and RenoMark. You focus on decisions; we handle the rest.
If you’re looking to build a custom home in Toronto and prefer to build without permit headaches – start with a discovery consultation to align zoning, drawings, and permits, then move smoothly into construction.