SECONDARY SUITE PERMITS — ONTARIO

Custom Home Permit

Professional permit drawings and application support for basement walkouts, separate entrances, exterior staircases, underpinning-related work, and other structural modifications across Ontario. **Permit Build** provides accurate, code-compliant documentation and expert support throughout the permit approval process.

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Permit Submission & Municipal Review Support

Residential & Commercial Permit Experts

Do you actually need a permit for a basement apartment?

In almost every Ontario municipality, yes. A second unit needs a building permit covering fire separation, egress, smoke/CO alarms, plumbing, ventilation, and a zoning check — even if the space is already finished. Skipping this step is the most common reason basement units can’t be legally rented or insured.

What's Included in a Basement Apartment Permit?

Zoning & Regulatory Compliance

Building Code & Fire Safety Review

Permit Drawings & Application Documents

Engineering Coordination (If Needed)

Permit Submission & City Review Assistance

▸ Key Requirements

What the city is actually checking for

Minimum ceiling height as set out in the Ontario Building Code
Egress windows sized for safe exit from every bedroom
Fire separation rated between the unit and the rest of the house
Interconnected smoke and carbon monoxide alarms
Proper ventilation and mechanical/HVAC servicing
A separate entrance, independent of the main unit
Minimum window glazing area for bedrooms and living space

Ready to make the basement legal?

We prepare the drawings, check the secondary-suite requirements, and keep the file organized so your application reads clearly to a reviewer — not like a stack of guesses.

From first call to city approval, in six stages

01

Approval & Support

On-site measurement and information gathering at the property.

02

Site Visit

On-site measurement and information gathering at the property.

03

Design

Preliminary design back within 5–10 business days, depending on scope.

04

Permit Package

Once the design is confirmed, we prepare the full package for submission.

05

City Submission

We submit the application and manage the city’s review directly.

06

Approval & Support

We respond to city comments and support the file through to approval.

▸ Key Requirements

What typically goes in the package

Not every project needs every drawing on this list. We confirm the exact set based on your property, municipality, and scope before work begins.

Common Reasons for Permit Review Delays

Drawings Not Prepared by a Qualified Designer

Incomplete Fire Separation Details

Insufficient Ceiling Height Clearance

Parking Requirements Not Met

Inadequate Window Size for Natural Light & Glazing Standards

Why Clients Trust Permit Build

"Excellent quality polycarbonate sheets at competitive prices. The materials were durable, exactly as described, and delivered on time. Great customer service."

Harpreet Singh

Verified Google Review

"Outstanding service from Permit Build. They took care of the permit application from start to finish, communicated every step clearly, and helped us avoid unnecessary delays. Highly professional and a pleasure to work with."

Maria Malik

Verified Google Review

"Excellent experience with Permit Build from start to finish. They were knowledgeable, detail oriented, and helped move our project forward smoothly. Reliable service and great communication throughout."

Maha Dogar

Verified Google Review

"Permit Build provided outstanding engineering services from start to finish. They also supplied high-quality building materials at competitive prices, making the entire project smooth and hassle-free. Highly recommend their knowledgeable and professional team!"

Nasir Sohail

Verified Google Review

"I was impressed with the quality of Permit Build’s drawing services. They took the time to understand my project, produced clear and professional permit drawings, and were always quick to answer my questions. I would definitely use their services again."

Azhar Asim

Verified Google Review

"Permit Build provided excellent drawing services from start to finish. The permit drawings were accurate, detailed, and completed on schedule. Their professionalism and attention to detail made the approval process smooth and stress-free."

Ghulam Mohiuddin Virk

Verified Google Review

Common building permit questions

Do I need a permit for a basement walkout in Ontario?

Yes. Most basement walkout projects require a building permit, especially when they involve structural changes, new exterior entrances, or modifications to the foundation.

What drawings are required for a basement walkout permit?

Permit applications typically include site plans, floor plans, elevations, sections, structural details, and other supporting documents required by your municipality.

Can I add a separate entrance to an existing basement?

In many cases, yes. The project must comply with local zoning regulations, building codes, and safety requirements. We can assess your property and guide you through the approval process.

Does a basement walkout require engineering?

Engineering may be required if the project involves foundation alterations, retaining walls, structural modifications, or other load-bearing components.

Can Permit Build submit my basement walkout permit application?

Absolutely. Permit Build prepares the required drawings, submits your permit application, and provides support throughout the municipal review and approval process.

Ready to Build a Legal Basement Apartment?

At Permit Build, we make the permit process simple, efficient, and stress-free. From professional drawings to permit approval, our team is here to help you move your project forward with confidence.