The Building Division Plans Examination Services team is responsible for the review of building design proposals. Plans examinations are performed under the authority of the Ontario Building Code Act. Typical design proposals include new buildings, additions, alterations and changes of use. Compliance with relevant building standards not only ensures the safety of the buildings' occupants but also the habitability of those buildings.
The Ontario Building Code, O.Reg. 332/12 as Amended, states the following when making changes to a building.
Notice of Change
(12) No personal shall make a material change to be made to a plan, specification, document or other information on the basis of which a permit was issued without notifying, filing details with and obtaining the authorization of the chief building official.
1992, c 22, s. 8(13).
A building exists, in its current configuration, as a result of the plans that have been approved by the City of Mississauga Building Department. Should a building be altered materially or otherwise, it would constitute a deviation from the approved plans and as such would require authorization from the Chief Building Official. The authorization from the Chief Building Official would take the form of a Building Permit. The documents necessary to make a building permit application can be found on our web site
Spatial Separation Between Houses
In applying OBC Division B, Section 220.127.116.11 (1) and (2), the follow example illustrates two methods of calculating allowable glazed area and the different results that can be obtained.
Area of Exposed Building Face...............................
2x3 = 6 SQM
Table 18.104.22.168 (With Area = 30 SQM, Ld = 2.5M) Allowable Percentage of Glazed Openings = 17%
Allowable Glazed Openings (Wall Area 3)...............
6 SQM @ 17% = 1.02 SQM
Total Glazed Area
= Wall Area 1 + Wall Area 2 + Wall Area 3
= 1.08 + 3.45 + 1.02
= 5.55 SQM
Maximum Allowable Area of Glazed Openings = 3.6 SQM
Maximum Allowable Area of Glazed Openings = 5.55 SQM
Factory-Built Fireplaces, Fireplace Inserts and Hearth Mounted Stoves
The Ontario Building Code, O.Reg. 332/12 as Amended, provides the following direction for the installation of Factory-Built Fireplaces, Fireplace Inserts and Hearth Mounted Stoves.
9.22.8. Factory-Built Fireplaces
22.214.171.124. Conformance to Standard
(1) Factory-built fireplaces and their installation shall conform to CN/ULC-S610-M, "Factory-Build Fireplaces".
9.22.9. Clearance of Combustible Material
126.96.36.199. Clearance to the Fireplace Opening
(1) Combustible material shall not be placed on or near the face of a fireplace with 150 mm of the fireplace opening, except where the combustible material projects more than 38 mm out from the face of the fireplace above the opening, such material shall be at least 300 mm above the top of the opening.
188.8.131.52. Metal Exposed to the Interior
(1) Metal exposed to the interior of a fireplace such as the damper control mechanism shall have a least 50 mm clearance from any combustible material on the face of the fireplace where such metal penetrates through the face of the fireplace.
184.108.40.206. Clearance to Combustible Framing
(1) Not less than a 100 mm clearance shall be provided between the back and sides of a solid fuel-burning fireplace and combustible framing, except that a 50 mm clearance is permitted where the fireplace is located in an exterior wall.
(2) Not less than a 50 mm clearance shall be provided between the back and sides of the smoke chamber of a solid fuel-burning fireplace and combustible framing, except that a 25 mm clearance is permitted where the fireplace is located in an exterior wall.
220.127.116.11. Heat Circulating Duct Openings
(1) The clearance of combustible material heat circulating duct openings from those openings shall be not less than,
(a) 200 mm where the combustible material projects not less than 38 mm from the face, and
(b) 150 mm where the projection is than 38 mm.
9.22.10. Fireplace Inserts and Hearth-Mounted Stoves
18.104.22.168. Appliance Standard
(1) Fireplace inserts and hearth mounted stoves vented through the throat of a fireplace shall conform ULCS628, "Fireplace Inserts".
(1) The installation of fireplace inserts and hearth mounted stoves vented through the throat of a fireplace shall conform to CSA B365, ¿installation Code for Solid-Fuel-Burning Appliances and Equipment¿.
(2) Fireplace Inserts and hearth mounted stoves vented through the throat of a fireplace described in Sentence (1) may be installed in existing fireplaces only if a minimum thickness of 190 mm of solid masonry is provided between the smoke chamber and any existing combustible materials, unless the insert is listed for lesser clearances.
(3) A fireplace insert installed in a masonry fireplace will have,
(a) a listed metal chimney liner installed from the insert collar to the top of the chimney, or
(b) a direct sealed connection to the chimney flue such as provision is part of an insert conforming to Sentence 22.214.171.124.(1).
Changes in the Use of a Building
When the use of a building is changed, it may represent an increase in hazard to the occupants of the building. When constructed in accordance with current building codes, the occupants of the building and the building itself are protected from the anticipated levels of hazard by compensating construction. Consequently, when the use of a building is changed and, in the opinion of the Ontario Building Code, the hazard level is increased, measures have to be taken to mitigate those additional hazards. The following code articles outline when an additional hazard exists and consequently when a building permit is required.
126.96.36.199. Permits Under Section 10 of the Act
(1) Except as provided in Sentence (2), the following changes in use of building or part of a building constitute an increase in hazard for the purposes of section 10 of the Act and require a permit under section 10 of the Act:
(a) a change of the major occupancy all or part of a building that is designated with a ¿Y¿ in Table 188.8.131.52. takes place,
(b) a suite of a Group C major occupancy, is converted into more than one suite of Group C major occupancy,
(c) a suite or part of a suite of a Group A, Division 2 or a Group A, Division 4 major occupancy is converted to a gaming premises,
(d) a farm building or part of a farm building is changed to a major occupancy,
(e) a building or part of a building is changed to a post-disaster building,
(f) a building or part of a building is changed to a retirement home regulated under the Retirement Homes Act, 2010 or
(g) the use of a building or part of a building is changed and the previous major occupancy of the building or part of the building cannot be determined.
(2) A person is exempt from the requirement to obtain a permit under section 10 of the Act where the change in use of the building or part of the building will result from proposed construction and a permit under section 8 of the Act has been issued in respect of such construction.
(3) A person is exempt from the requirement to obtain a permit under section 10 of the Act for the change of use of a building in unorganized territory.
Permit Required for Change of Use
For more detailed information about occupancy classifications refer to the Ontario Building Code, O.Reg 332/12 Division A Part 1, Section 184.108.40.206 and Appendix A, Section 220.127.116.11 (1)
Any information contained herein is strictly for information purposes only and should be reviewed in conjunction with The Ontario Building Code O.Reg 332/12, as amended. In the case where the information provided conflicts with that of the text contained in The Ontario Building Code O.Reg 332/12, as amended, the text shall prevail.
Site Servicing Design Approval Process
The following outlines the procedure to be followed when seeking Building Department approval for a site servicing design proposal.
1. Contact the Region of Peel’s Public Works Department regarding Preliminary Review and “Approved in Principle” Site Servicing drawings (10 Peel Centre Drive, Brampton, Ontario, Phone 905-791-7800 extension 7973).
2. Contact the City of Mississauga's Transportation and Works Department regarding Storm Sewer Approval (Phone 905-615-3200 extension 3526).
3. When the Region of Peel has approved the site servicing drawings, in principle, the applicant shall deliver to the Building Department’s Customer Services Counter, 5 copies of the approved drawings along with the following completed documents:
Application for a Permit to Construct or Demolish form,
Acknowledgement by the Applicant of Incomplete Application form and,
4. When the Fire Department has approved the submitted drawings, the applicant will be contacted by Fire Prevention Plans Examination to pick up and deliver 4 copies of the Fire Prevention approved stamped drawings to the Region of Peel for their final approval.
5. When final approval is granted by the Region of Peel, the applicant will be contacted to pick up and deliver 3 copies of the drawings, approved by Fire Prevention and the Region of Peel, along with any connection receipts to the Building Department Customer Service Counter. These drawings will then form part of the Building Permit approval.
If the site drainage design includes storm water retention/management, Transportation and Works approval may be required. Please contact the Transportation and Works Department’s Environmental Services Section at (905) 615-3200, Ext 3526.
Applications for site servicing approvals should be accompanied by a water connection receipt from the Region of Peel
On occasion, deviations from this “typical” procedure may occur
Site Servicing Flow Chart
The following is a process flow by which site servicing proposals may receive approval from the appropriate authorities.
When replacing a furnace in a residential dwelling, approval, in the form of a Building Permit, is required in the following instances.
Permit Not Required
Replacement furnace has the same efficiency as the furnace to be replaced and,
Furnace ductwork is to remain unchanged
Permit Is Required
Replacement furnace is of a higher efficiency than the furnace to be replaced or
Furnace duct work is being altered
If a permit is required, both the application to Construct or Demolish and the Furnace Replacement forms are to be completed and submitted to the Building Department’s Front Counter. Forms are available at our website.
If a permit is required for duct modification, HVAC drawings and heat loss/gain calculations, prepared by a qualified designer, are to be submitted
Note: Building Permit Fees, in accordance with the Building By-Law, are applicable.
2. The Building Division will circulate all submitted documents to The City of Mississauga Transportation and Works (T&W) for their review. When T&W is satisfied with the completeness of the submission they will request 16 additional copies of the drawings to be submitted directly to T&W.
3. T&W will coordinate with the PUCC for their approval.
4. Upon receipt of PUCC approval
T&W will instruct the applicant to contact Realty Services, 300 City Centre Drive, second floor to arrange for any required encroachment agreements on City of Mississauga Right of Ways.
Note: If an encroachment is proposed on an adjacent private property proof of a registered encroachment agreement between both parties will be required by T&W.
Realty Services staff will notify T&W that all required encroachment agreements have been executed
T&W will request two final copies of the drawings to be submitted directly to T&W
5. T&W will forward two copies of the approved documents to the Building Division.
6. The Building Division will contact the applicant to pick up the Building Permit along with the approved designdocuments.