SECONDARY SUITE PERMITS — ONTARIO

Home Addition Permit

Professional permit drawings and application support for home additions, second-storey additions, rear extensions, and residential renovation projects across Ontario. **Permit Build** proudly serves homeowners in Toronto, Markham, Richmond Hill, Vaughan, Mississauga, and throughout the GTA with reliable permit solutions.

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 Home Addition Permit?

Zoning & Property Compliance Review

Building Code & Structural Review

Permit Drawings & Construction Documentation 04

Consultant Coordination (If Required)

Permit Submission & Municipal Review Support

▸ Key Requirements

Key Requirements for a Home Addition Permit

Proposed Addition Layout, Size & Connection to the Existing Home
Zoning Compliance for Setbacks, Height, Lot Coverage & Floor Area
Foundation, Framing, Roofing & Structural Details
Existing & Proposed Floor Plans, Elevations & Building Sections
Energy Efficiency & Ontario Building Code Compliance
Site Grading, Drainage & Property Condition Review (Where Required)
Engineering & Professional Consultant Coordination (If Required)
Permit Drawings & Supporting Documentation for Municipal Approval

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.

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

Drawings & Documents Commonly Required

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 home addition in Ontario?

Yes. Most home additions require a building permit to ensure the project complies with local zoning regulations, the Ontario Building Code, and municipal requirements.

What drawings are required for a home addition permit?

Permit applications typically require site plans, floor plans, elevations, building sections, and construction details. Additional engineering drawings may be needed depending on the project.

Can Permit Build assist with zoning reviews?

Yes. Permit Build reviews your project for zoning compliance, including setbacks, lot coverage, building height, and other municipal requirements before submission.

Does every home addition require engineering?

Not always. Engineering is only required when your project includes structural elements or other components that require professional design and review.

Can Permit Build submit my permit application?

Absolutely. We prepare the required drawings, submit your permit application, and provide 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.