Mississauga deck permits · Reformity Inc.Deck Permit Drawings in Mississauga
Yes, if it's more than 0.61 m (2 ft) high: Mississauga requires a building permit for those decks and for covered porches, applied for through ePlans. A deck under 600 mm needs no permit, but it still has to meet the Zoning By-law.
We prepare and submit your permit drawings to the City of Mississauga, then build to the approved plan.
Do you need a permit?
Deck permit rules in Mississauga.
In Mississauga the line is 0.61 m (2 ft): a deck higher than that needs a building permit, whether it's off the back of an Applewood side-split or an Erin Mills two-storey. Zoning applies regardless: a deck at or below the first storey may reach 5.0 m into the required rear yard but must stay 1.5 m from the rear lot line, and one over 10 m² and more than 0.61 m above established grade counts toward lot coverage. On brick-clad houses, the City's sample drawings don't let a deck bear on brick veneer, so we fix it to the foundation or framing, or build it freestanding.
Checked against the City of Mississauga's own by-laws and pages in November 2026. Rules change, so we confirm them for your address before we draw.
When a permit is needed
Mississauga's building permit list includes any deck more than 0.61 m (2 ft) high and any covered porch. A deck under 600 mm (2 ft) is on the City's list of projects that don't need a permit.
City of Mississauga: when a building permit is requiredRear-yard projections and setbacks
A deck at or below the first storey may extend 5.0 m, stairs included, into the required rear yard, staying 1.5 m from the rear lot line and 0.61 m from side lot lines (0 m where the house needs no interior side yard).
Zoning By-law 0225-2007, Part 4.1, s.4.1.5 (PDF)Freestanding deck limits
A freestanding deck is allowed in the rear yard if uncovered, no more than 1.2 m above grade at any point, and set back 0.61 m from side lot lines and 1.5 m from the rear lot line. Decks can't encroach into a Greenlands setback.
Zoning By-law 0225-2007, Part 4.1, ss.4.1.5.6 and 4.1.5.11 (PDF)Big decks count toward coverage
Lot coverage includes pergolas and decks larger than 10 m² and higher than 0.61 m above established grade; outdoor pools and eaves of 0.45 m or less are excluded. A large raised deck can count against your zone's maximum lot coverage.
Zoning By-law 0225-2007, s.1.2 Definitions (PDF)Footings, guards and veneer
The City's sample deck drawings show concrete piers at least 1,200 mm below grade on undisturbed soil, and guards 900 mm high on decks up to 1,800 mm above grade (1,070 mm higher up) with openings under 100 mm. Decks can't bear on brick veneer.
City of Mississauga: Deck Sample Drawing (PDF)
What the city asks for
The Mississauga application.
Issued by: City of Mississauga, Planning & Building Department – Building Division. We put the package together, submit it and keep you posted.
Documents
- Applicable Law Form
- Schedule 1 Designer Information
- Site plan (metric scale): lot lines, existing and proposed structures, easements, setbacks
- Site statistics: lot area, frontage, lot coverage in m² and percent
- Floor plan: framing size, grade, spacing and spans; soil bearing capacity; foundation specs
- Elevations of each side: grade, floor levels, guard heights
- Roof plan, if the deck or porch is covered
- Unsecured PDFs, one drawing per file, greyscale, landscape
How it goes
- 1We measure the yard and check your zone's setbacks and coverage, plus protected trees (15 cm and up), Greenlands, conservation and heritage status.
- 2We draw the site plan with site statistics, the framing plan and elevations, and fill in the Applicable Law Form and Schedule 1, the designer's declaration with BCIN details or the exemption that applies.
- 3We submit through ePlans, upload the drawings and clear any prescreen corrections; the permit fees are paid in ePlans after prescreen.
- 4We answer review comments, then download the issued permit and approved drawings.
- 5We book the initial site inspection, then each stage it calls for, such as footings before concrete and the final.
- 6In Old Port Credit Village a deck in a front or side yard needs a heritage permit, and in Streetsville one in the front yard or a side yard that abuts a street does; only single-storey rear decks out of street view are exempt. We prepare those drawings too.
- Processing time
- Prescreen usually takes about 7 to 10 business days, depending on volume. If the application is complete, the City says the first review of a residential application may take 10 business days; each resubmission can add two or more weeks.
- Inspections
- Book an initial site inspection before work starts; it sets which inspections apply and in what order. The City's prescribed stages include footing (book before placing concrete), framing and final, and the final checks that guards and handrails are installed, secure and at the required height, and that guards stop a 100 mm sphere. Book online with the permit number and WEB ID.
Deck drawing — framing plan — Framing plan, section through the deck and elevation. Illustrative sample sheet. Click to enlarge.
Deck drawing — elevations & details
Permit drawings included
We prepare and submit your permit drawings.
A site plan with setbacks, a framing plan, a section through the deck, and footing, guard and stair details, drawn to the City of Mississauga's checklist and submitted with your application.
- Dimensions to your lot lines
- Materials, sizes and spacing
- Footing and base sections
- Code notes for the inspector
Decking · real projects
Recent decking jobs across the GTA.
Real Reformity jobs from our project files. Customer addresses are never published.
Mississauga deck permit FAQ
Quick answers.
The City's prescreen usually takes about 7 to 10 business days, depending on volume. Once the application is deemed complete, the first review of a residential application may take 10 business days. Incomplete applications aren't held to that timeline, and each resubmission can add two or more weeks, so we aim to submit a complete set the first time.
Then it needs Committee of Adjustment approval, which the City lists among approvals that may be needed before a building permit can be issued. Even a deck under 600 mm that needs no permit must meet zoning, including the 1.5 m rear and 0.61 m side setbacks that apply to most rear-yard decks.
Often. In a conservation authority regulated area, Ontario Regulation 41/24 exempts an unenclosed detached deck or patio of 15 m² or less that isn't cantilevered or in a wetland or watercourse; other decks generally need the authority's permission, which the City lists among approvals needed before a permit is issued. Next to Greenlands-zoned land, no deck may project into the setback, which is at least 5.0 m.
Send the form on this page or call 437-241-6287. We reply within one business day, visit to measure, prepare the drawings for the City of Mississauga, submit the application and give you a fixed written price for the work.
Let us handle the Mississauga permit.
We measure, draw it to the City of Mississauga's rules, submit the application and build to the approved plan. One business-day reply.