Basement Apartment Permit Toronto

Cadaxx Design provides reliable, code-compliant basement apartment permit drawings for homeowners and builders across Toronto, Scarborough, North York, Etobicoke, and the GTA.
Contact us to start your legal basement apartment, underpinning, or walkout permit today.

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Why You Need a Basement Apartment Permit

Adding or converting a basement into a secondary suite requires a building permit from the City of Toronto.
Permits confirm your design meets fire-separation, egress, ceiling-height, HVAC, and structural standards under the Ontario Building Code.
Without a permit, you risk fines and insurance issues — with Cadaxx, the process is fast, accurate, and fully approved.

Our Process for Toronto Basement Apartment Permits

Step 1 – Site Measure & As-Built Plans

Detailed on-site measurements of existing layout and structure.

Step 2 – Zoning & OBC Review

Verification of setbacks, lot coverage, and secondary-suite eligibility.

Step 3 – Design & Layout

Functional floor plan including all code-required elements.

Step 4 – Permit Drawings

Plans, sections, and details covering fire-rating, egress, plumbing, HVAC, and structure.

Step 5 – Submission & Coordination

Cadaxx manages submission and communication with City examiners until approval.

Comprehensive Basement Services

Legal Basement Apartments
Full secondary-suite design with fire-rated assemblies and OBC compliance.

Underpinning Permits
Structural drawings for basement lowering and foundation reinforcement.

Basement Walkouts
Exterior access design with retaining walls, grading, and drainage details.

Interior Renovations
Layout optimization, wall removal, and upgraded finishes.

Featured Basement Projects

Legal Basement Apartment – West Point, Scarborough
Underpinning Permit – Riverdale Ave, Leslieville
Basement Walkout – Lonsmount Dr, Forest Hill

Each project shows how Cadaxx Design delivers precise, code-compliant drawings that achieve fast City of Toronto approval.

Why Choose Cadaxx

Licensed Ontario BCIN designers specializing in basement permits
Proven record of fast approvals across Toronto
Coordination with structural, HVAC, and fire consultants
Accurate drawings that pass inspection the first time
Trusted by homeowners and builders throughout the GTA

FAQs — Basement Apartment Permits in Toronto

What makes a basement apartment legal?
It must comply with OBC requirements for fire separation, egress, ceiling height, ventilation, and plumbing.
How long does a basement permit take to approve?
Usually 4–8 weeks, depending on the City’s workload and project complexity.
Can Cadaxx design underpinning and walkouts together?
Yes — our integrated approach allows underpinning, walkout, and apartment design to be approved under one coordinated submission.

Start Your Basement Apartment Permit in Toronto

Cadaxx Design provides reliable, code-compliant basement apartment permit drawings for homeowners and builders across Toronto, Scarborough, North York, Etobicoke, and the GTA.
Contact us to start your legal basement apartment, underpinning, or walkout permit today.

Basement Walkout

Lonsmount Dr

Toronto

This Forest Hill home received a new basement walkout designed by Cadaxx Design to improve access, natural light, and functionality. The walkout seamlessly integrates with the main house, creating a comfortable and safe secondary entrance to the lower level.

Completed 2016

Basement Underpinning

Riverdale Ave

East York

This Leslieville property underwent a full basement underpinning to increase ceiling height and improve livability. Cadaxx prepared architectural and structural drawings and ensured full compliance with Toronto Building Code. The upgraded lower level now provides a bright, functional space ready for finishing or a future rental suite.

Completed 2020

Basement apartment

Barrymore Rd

Scarborough

This basement apartment on Barrymore Rd was transformed into a bright, functional secondary suite with modern finishes and efficient space planning. The design improves livability through open layouts, upgraded lighting, and clean detailing, delivering a comfortable rental-ready unit now fully built.

Completed 2025