Building and Renovating

Building and Renovating in Mississauga

New service delivery channel for building permits, sign permits, and zoning certificates.

For more information on ePlans, or to start your application visit ePlans .
Paper applications will no longer be accepted after December 2015 in accordance with our Building By-law 251-13, as amended.

Before you start a building or renovation project in Mississauga, you need to find out:

  • What you are allowed to build on your property, and

  • If you need a building permit

Your property's zoning will determine what you can build on your property. For example, the City's Zoning By-law sets out what uses are permitted; how far a structure must be from the lot lines; and, the amount of parking required. A permit is usually needed if you are building and renovating, making interior alterations to an existing building, putting up a sign, or opening a business in a new location.

When is a building permit for residential construction required?

  • Construct/demolish a house or an addition to an existing house

  • Construct/demolish an attached or a detached garage

  • Construct a deck, greater than 10m2 (107.64 ft2) in area, and all decks attached to the house which are greater than 600mm (2 ft) above the adjacent grade

  • Construct a porch or a balcony

  • Construct a basement walkout

  • Construct/demolish a detached accessory structure greater than 10m2 (107.64 ft2)

  • Construct a heated or unheated sunroom

  • Erect tents greater than 60m2 (645.85 ft2) or all tents erected within 3.0 m (9.8 ft) of a building

  • Construct roofing with structural work (i.e.- adding new dormers, skylights)

  • Create new openings for, or increase the size of, doors and windows

  • Excavate a basement to increase existing headroom/ underpinning foundation walls

  • Install, change, remove or repair load-bearing walls and other structural components

  • Install or modify HVAC (Heating, Ventilation and Air Conditioning) systems

  • Install, replace or repair plumbing, drainage or sewer systems

  • Construct a chimney serving a solid fuel fire appliance

  • Change a building's use

  • Install, replace or repair a private sewage system

  • Replace a furnace that is changing fuel type, efficiency or capacity

  • Install a gas fireplace as a heating appliance

  • Fire damage repair (structural & mechanical)

When is a building permit for non-residential construction required?

  • Erect, alter or repair structures over 10 m2 (107 ft2)

  • Change the use of an existing space

  • Undertake tenant improvements

  • Alter interior partitions or the install of skylights, windows or doors

  • Create a patio or covered areas

  • Erect garden centres, tents, air supported structures

  • Erect, alter or repair loading docks

  • Repair balconies and parking structures

  • Alter exterior facades

  • Construct or install accessory structures such as garbage enclosures

  • Construct or install designated structures such as retaining walls, tanks, solar panels and communication towers

  • Undertake mechanical alterations

  • Install commercial kitchen exhaust and suppression systems

  • Install spray booths, dust removal systems

  • Install rooftop HVAC (Heating, Ventilation, and Air Conditioning) replacements

  • Install a structure of any size which contains plumbing

  • Install wood burning fireplaces, ovens, unit heaters and other heating appliances including the alteration, replacement or extension of ductwork

  • Install geothermal systems

  • Undertake site servicing

  • Install new, alter or extend existing plumbing, heating or fire protection systems

  • Install maglocks

When is a building permit not generally required?

  • Construct/demolish a detached accessory structure under 10m2 (107.64ft2) with no plumbing and with a maximum height of 3.0m (i.e. garden/utility shed/gazebo)

  • Construct/demolish an uncovered deck less than 10m2 (107.64ft2) and less than 600mm (2 ft) above adjacent grade

  • Construct/demolish a non load-bearing basement wall (i.e. finishing basement with no plumbing or HVAC [Heating, Ventilation or Air Conditioning])

  • Replace doors and/or windows that are the same size as the existing

  • Install siding on a house, garage or accessory building

  • Re-shingle a roof

  • Install eavestroughs, provided the drainage is contained within the property

  • Damp-proof basements

  • Paint or decorate

  • Install kitchen or bathroom cupboards without plumbing

  • Carry out minor repairs to masonry

  • Erect a fence

  • Carry out landscaping work

  • Add on air conditioning to an existing HVAC system

  • Install a decorative gas fireplace

  • Fire damage repair (non-structural & non-mechanical

Note: Building permits are not required for residential pools serving 6 or fewer residential housing units. However, a pool enclosure permit is required and can be obtained from the Compliance and Licensing Section, By-law Enforcement Division of the Transportation and Works Department located on the Ground Floor of the Civic Centre.

How long will it take?

If your application is deemed to be a complete submission, review times are legislated based on the type of application. This means that the City of Mississauga will make every effort to meet the following legislative processing times.

10 Days

Residential housing type applications, new construction and alterations

15 Days

Part 9 scope buildings, other than residential housing

20 Days

Part 3 scope buildings, new construction and alterations

30 Days

Complex buildings

It is important to remember that processing time is the time to complete the initial review of your application; it does not mean that your building permit will be issued within the legislative processing times.

Applications that are processed outside of the complete application process have processing times that can vary. Processing times for these types of applications can be found at the Estimated Permit Application Processing Times  chart link.

How do I get help?

  • Call Centre 3-1-1 available during normal business hours (Monday to Friday). Our Call Centre representatives can answer general questions concerning your building permit application. They can also respond to some technical inquiries. Where your inquiry requires a more detailed response, a request will be forwarded to Planning and Building and one our staff will get back you within 2 business days.

  • The City's website is open 24/7 and contains lots of detailed information. The answer to many of your questions can be found online.

  • Email any questions to A response will be provided within 2 business days.

  • Planning and Building Customer Services Centre is located on the 3rd floor (facade side) of the Civic Centre. We are open Monday to Friday between 8:30 am and 4:30 pm to answer any of your questions.

How much will it cost?

Fees for building permit applications are required to be paid in full at the time of application. Most building applications fees for new construction (creating new floor area space), or alterations are calculated by multiplying the area by a cost per square metre. This information can be found in our Building By-law 251-2013 .

Please note that there are penalties for starting work before obtaining your permit.

There may be additional fees associated with your building permit application that will need to be paid prior to issuance, depending on the type and scope of your application. The types of fees that may be applicable can be found in the Typical Development Cost Guidelines.

Featured Articles:

If you have already applied for a building permit and want to track your application status go to the Status and Resubmission page.