Building Permits

Building and Renovating


Building Department

395 Mulock Drive, Newmarket,

905-953-5300 x 2400

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Due to the pandemic, Building Division staff have been working remotely accepting and processing Building Permit applications. Due to the large influx of applications and our recent transition to a new Permitting solution, we are experiencing delays in processing Building Permits. Your application is important to us and we thank you for your understanding and patience. Please see details here.

Most renovation, alteration, construction and demolition projects require a Building Permit prior to work commencing work. The Ontario Building Code(OBC) is the legislative framework that governs construction, renovation and change-of-use in all of Ontario. The OBC establishes detailed technical requirements and minimum standards for building within the province. For more information, visit or contact the Ministry of Municipal Affairs and Housing.

Building Permit Information

When is A Building Permit Required?
Construction or demolition of:
  • New home or addition to an existing home; 
  • Deck greater than 10 square meters, attached to the home or is 600mm above grade; 
  • Enclosed or unenclosed porch; 
  • Below grade entrance or basement walkout; 
  • Finishing a basement; 
  • Heated or unheated sunroom; 
  • Detached structure greater than 10 square meters (108 square feet) 
  • Raised porches or decks; 
  • Carports or garages; 
  • Any structural alterations; 
  • Any mechanical alterations (HVAC/Plumbing); 
  • Moving or lifting a home; 
  • Installing a wood stove or fireplace; 
  • Creating an Accessory Dwelling Unit (ie. Second suite/In-law Suite); 
  • Fire damage repairs; 
  • Retaining walls greater than 1 meter in height; creating new openings for, or increasing the size of, doors and windows; 
If your proposed project is not listed above, we encourage you contact for more information to ensure your proposal does not require a permit.

When is a Building Permit Typically Not Required?
A Building Permit is usually not required when:
  • Construction or demolition of a standalone building under 10 square meters, with no plumbing;
  • construction or demolition of decks not attached to a house and under 10 square metres;
  • replacing doors and/or windows that are the same size of existing;
  • Building detached (structurally independent​) structures 10 square meters (108 square feet) or less in area;
  • Floor and ceiling finishes;
  • Repairs to chimneys, porches, decks or roofs;
  • Waterproofing repairs to basement (no plumbing involved);
  • Replacement of furnace (no building alterations); 
  • painting or decorating
If your proposed project is not listed above, we encourage you contact for more information to ensure your proposal does not require a permit.

Steps to Apply for a Building Permit?
To prepare a submission of a building permit application, follow the steps laid out below.
  • Determine what applicable law applies to the subject property. We recommend reviewing your properties zoning requirements, determining if your property is located within the Lake Simcoe Region Conservation Authority or if the structure is located on the Heritage Registry.
  • Prepare working drawings that are accurate, to scale and describe the construction you are proposing. For more information on what drawings are required, please visit our “Application Forms and Required Documents Drop down on this page.
  • Complete all the applicable application forms. Ensure to include the Applicant and owner contact information where applicable.
  • Currently, applications are being accepted via email. Please email all documents to If the application is to large, kindly send us an email and we will provide you with an internal sharelink to upload documents too. We do not accept any links to external fileshare sites. Further, .zip files will not be accepted. 
  • Once your application is received, a Building Services Technician will contact you in regards to fees owing and how to make payment.
  • Ensure to keep an eye on your emails as you may receive an email requesting more information from the Building Services Technician or the Plans Examiner in regards to your Application.
Application Form and Required Documents

Before applying for a building permit, ensure that your intended project conforms to the applicable zoning by-law. Locate the zoning for any property in Newmarket at the "What is my zoning?" page

To obtain a Building Permit for any renovations and/or repairs, the following documents are required:



In addition to the above mentioned forms, the drawings you need to provide with a building permit application vary depending on the scope of work. Below is a list of typical drawings and what information they should include. To confirm what drawings you will need, please contact a Building Services Technician at or 905-953-5300 ex. 2400.

Site Plan -  Drawing showing the complete property and identifying all structures in relation to property boundaries. It should include:

  • Scale
  • North arrow
  • Lot lines and dimensions (in metric)
  • Existing and proposed construction and dimensions (in metric)
  • Etc. 

Floor Plans - Scaled drawing of the arrangement of rooms in one story of a building. It should include:

  • Scale
  • Use of rooms and spaces
  • Dimensions (in metric)
  • Extent of existing demolished and new construction
  • Size, type and location of exterior and interior walls and partitions
  • Widths, locations and lintel size of all new openings
  • Location, dimensions and direction of stairs
  • Sectional arrows
  • References to detailed drawings
  • Material specifications or notes
  • Heating details and calculations
  • Etc. 

Elevations - Drawings showing the exterior view of each side of the house. Each elevation is identified by the direction it is facing and should include:

  • Scale
  • Extent of existing demolished and new construction 
  • Vertical dimensions of walls, windows and doors
  • Grade level 
  • Overall height from grade to mid-point between eaves and top of roof, and from grade to top of roof
  • Exterior wall cladding, finishes and flashing
  • Overhang dimensions
  • Roof shape, slope and finish
  • Rainwater leader and eaves trough
  • Etc. 

Sections -  represents a view of the house along an imaginary line at a particular location and illustrates construction details. The extent of the sections should correspond with the sectional arrows shown on the plans. Sections should include:

  • Scale
  • Details of footings, foundations, walls floors and the roof
  • Distance from grade to floor and underside of footing
  • Attic and crawl space ventilation
  • Etc. 

Mechanical Drawings - Required when proposing changes/additions to the mechanical system. Elements may be identified on floor plans, showing the layout of the mechanical components. Further requirements may include heat loss and heat gain calculation to determine the capacity of the furnace required and drawings of the duct design and layout (by a qualified designer). This information is generally available from a mechanical/heating contractor.

Can I Submit My Own Drawings?

For a residential structure, a homeowner may design and take responsibility for their own drawings as per Division C of the Ontario Building Code. If you are unfamiliar with various government regulations, by-laws and Ontario Building Code requirements, you may wish to hire a qualified designer instead. A Qualified Designer can be either an Architect, Engineer or Person with a Building Code Identification Number (BCIN). 

We recommend hiring a Qualified Designer to assist with drawing production and permit process and significant delays can arise if the drawings and specification are not complete, and do not comply with the Ontario Building Code or other Applicable Law. Most designs for Building Permits, not completed by the owner, will require a designer registered and/or qualified under Division C, Part 3, Section 3.2 of the Ontario Building Code (an Architect or Engineer is exempt from this requirement).

A Designer is anyone who is responsible for the design, which may also include preparing the drawings for submission. You may wish to check with a Building Services Technician to find out whether your project requires a qualified designer.

When will I r​eceive my permit?
Permits are usually issued between 10 to 20 business days if the application along with accompanying drawings are complete and the proposed construction meets all legal requirements such as zoning regulations, Ontario Building Code and the other requirements of other agencies such as the Conservation Authority, the Region of York and the Town's Public Works department.
I Received my Permit - What Now?
  • Post the Permit Card in a conspicuous place on your property, and review reviewed permit plans prior to starting construction.
  • Review your list of required inspections located on the reviewed permit plans. Ensure to contact two (2) days prior to your inspection time. Inspections are booked Monday to Friday from 8:30am- 4:30pm.
  • Construction can begin any time after the Permit Package has been received.
  • Local utilities such as hydro, gas and telephone operate independently from the Town of Newmarket and should be contacted regarding their specific approval and inspection requirements. (Please contact utilities prior to starting any excavation to determine the location of nearby underground services).

What inspections are required​ for my project?
The type of inspections required depends on the type of work being completed, can be found on your reviewed permit plans under “Mandatory Inspections”. To book an inspection, please contact Two (2) days notice is required to book an inspection.
How do I contact a Building Inspector?
To contact the Building Inspector to book an inspection or general inquiries, please email