Legal Basement Apartment Permits in Ontario
Converting your basement into a legal second unit is one of the best investments Ontario homeowners can make. Whether you want rental income, a space for family, or to increase your property value, a legal basement apartment requires proper building permit drawings and Ontario Building Code compliance.
About Our Legal Basement Services
Legal basement apartments — also called second units or accessory apartments — are permitted under Ontario's Planning Act in every municipality. But making it legal requires a building permit with drawings that demonstrate compliance with the Ontario Building Code's requirements for fire safety, separate egress, fire separations, ceiling height, ventilation, plumbing, and electrical systems. Our BCIN-qualified designer has extensive experience with second unit conversions across the GTA. We handle everything from initial feasibility assessment through to permit issuance, including coordinating with structural and mechanical engineers when required.
Why Choose Sandhu Design Build for Your Legal Basement?
Sandhu Design Build brings together BCIN-qualified design expertise and hands-on construction experience under one roof. When you work with us, you get a single point of contact for your entire project — from initial consultation and feasibility assessment through permit drawings, municipal submission, plan review, and construction. Our principal designer holds BCIN 512242 and has direct experience with GTA municipal building departments, meaning your permit application is prepared correctly the first time.
We serve homeowners and property owners across the Greater Toronto Area, with particular expertise in Brampton, Mississauga, Vaughan, Oakville, Milton, Toronto, Markham, and Richmond Hill. Every municipality has its own submission requirements, fee schedules, and review processes — and we know them from firsthand experience.
Our Process
Every legal basement project begins with a free consultation. We visit your property, discuss your goals, review zoning and code requirements, and provide a detailed quote. Once you approve, our designer produces your permit drawings, we coordinate with any required engineers, and submit your complete permit application. After permit issuance, our construction team builds your project to the approved drawings, managing all trades and inspections through to completion and final occupancy.
Get Started Today
Contact Sandhu Design Build for a free, no-obligation consultation about your legal basement project. Call us at (416) 809-0005, email [email protected], or fill out the form below. We respond within 24 hours.
Frequently Asked Questions
Costs vary by project scope and complexity. Contact Sandhu Design Build at (416) 809-0005 for a free, no-obligation quote specific to your legal basement project.
Most legal basement projects in Ontario require a building permit. Our BCIN-qualified designer will assess your project and advise on permit requirements during your free consultation.
Timelines depend on project scope. Permit drawings are typically completed in 5–10 business days. Municipal review adds 2–8 weeks. Construction timelines vary by project size.
We serve the entire Greater Toronto Area including Brampton, Mississauga, Vaughan, Toronto, Oakville, Milton, Markham, Richmond Hill, Newmarket, and Caledon.