Custom Deck Builder in Mississauga, ON

From PVC and wood decks to pergolas and custom outdoor features, Mississauga Decks & Trim delivers quality craftsmanship, clear communication, and outdoor spaces built to stand the test of time across Mississauga and the GTA.

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10-Year Workmanship & Structural Warranty

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Transparent Pricing, No Surprises, No Shortcuts

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Trusted Partner for High-End Decks & Outdoor Structures in South Mississauga & Oakville

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Get Started With a Custom Quote

Contact Us

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Mississauga's Master Carpenter Built on Old-World Standards

Building Exceptional Outdoor Spaces Since 2016

John Morrissey founded Mississauga Decks & Trim in 2016 after more than a decade of hands-on carpentry experience spanning Ireland and Canada. His training began at 19 under a demanding master builder in Tipperary, where doing things right the first time was non-negotiable. That standard has never changed.


Since bringing the business to Canada, we’ve completed over 100 custom deck and outdoor living projects across Mississauga, Oakville, and the GTA, with a finish carpenter’s attention to detail visible in every project. Our company is built on honest pricing, clear communication, and craftsmanship that genuinely stands the test of time.

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Our Services

We specialize in creating beautiful, long-lasting outdoor spaces that enhance the way you live at home. Whether you're building a new deck, upgrading your backyard, or adding custom features, our team delivers quality workmanship and exceptional results from start to finish.

Your Investment Is Protected For the Long Term

Every deck and outdoor structure we build is backed by our 10-year workmanship and structural warranty, plus the manufacturers' own product warranties. We also include a proactive 1-year follow-up visit as a standard part of our process, not because we expect problems, but because we stand behind everything we build.

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10-Year Workmanship & Structural Warranty

We warranty all labor, workmanship, and structural integrity for 10 years from the project completion date. If anything we built has a defect, we fix it. No runaround.

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Manufacturer Product

Warranties

As Fiberon Pro Users and TimberTech AZEK Pro Users, the composite and PVC decking materials we install carry manufacturer warranties ranging from 25-year stain and fade protection up to lifetime coverage, depending on the product line selected.

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Proactive 1-Year Follow-Up

Visit

One year after your project is complete, we return to inspect the deck and make sure everything is looking and performing as it should. This visit is built into our warranty process at no additional charge.

Why Homeowners in South Mississauga & Oakville Choose Mississauga Decks & Trim

Built on Trust, Backed by Experience

We are not a high-volume production company cutting corners to move to the next job. We are a small, highly skilled team that treats every project as a long-term reflection of our work, because we live and build in this community.



  • Red Seal–Standard Craftsmanship: John Morrissey trained under a demanding master carpenter in Ireland and brings old-world precision to every project. The finish carpenter in him shows in every detail.
  • Transparent, Fixed-Price Quotes: After a site consultation, you receive a written fixed-price quote valid for 30 days. The price you agree to is the price you pay. No last-minute add-ons or gotchas.
  • Turnkey Permit Handling: We manage the full permit process with the City of Mississauga and surrounding municipalities on your behalf, including drawings and any required submissions. You don't have to deal with the city at all.
  • 3D Visualization Before You Commit: In partnership with Lawrence Winterburn of Garden Structure, we offer photorealistic 3D design renderings before construction begins, so you know exactly what you're getting.
  • 10-Year Warranty + 1-Year Follow-Up: Our 10-year workmanship and structural warranty is backed by a proactive 1-year check-up visit included in every project.
  • Specialists in High-End Materials: We work with composite decking (Fiberon, TimberTech AZEK), PVC, exotic hardwoods including Ipe and Jatoba, and aluminum. We guide you to the right material for Ontario's climate and your long-term goals.


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Recognized for Excellence

From industry-recognized platforms to satisfied homeowners, our commitment to quality continues to earn trust across the region.

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Ready to Build Something That Lasts?

From custom composite decks and exotic hardwood builds to pergolas, gazebos, and rooftop structures, we bring your outdoor living vision to life with craftsmanship you can see and warranties you can count on.

Great Outdoor Spaces Start With Great Design

We partner with Lawrence Winterburn of Garden Structure, a designer with over 30 years of experience building outdoor structures, including training in Japanese temple building techniques and photorealistic 3D planning.


Before a single board is cut, you can see your finished project through detailed 3D renderings that bring your vision to life and eliminate design regret. This design-first approach means every build is intentional, precise, and built to your exact goals.

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Typical Contractor

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Pricing Approach: "Free estimate" with no fixed price. Costs can change mid-build.

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Craftsmanship Standard: Volume-driven builds where shortcuts often appear over time.

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Design & Visualization: You describe it, they build it. You find out at the end.

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Permit Handling: You handle the city paperwork.

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Materials Expertise: Standard lumber and basic composite.

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Warranty: Variable or verbal assurances.

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Who Shows Up: Rotating subcontractors.

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Mississauga Decks & Trim

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Pricing Approach: Fixed-price quote valid 30 days. No surprises, no gotchas.

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Craftsmanship Standard: Red Seal–standard carpentry. Every detail reviewed before we leave.

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Design & Visualization: Photorealistic 3D rendering before construction begins.

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Permit Handling: Full turnkey permit service available. We handle it for you.

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Materials Expertise: Composite (Fiberon, TimberTech AZEK), PVC, Ipe, Jatoba, aluminum.

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Warranty: 10-year written workmanship warranty + 1-year follow-up visit.

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Who Shows Up: The same skilled small team, led by the founder, on every job.

Serving South Mississauga, Oakville & the GTA

Based in Mississauga, we proudly design and build custom decks, pergolas, privacy screens, and outdoor living spaces for homeowners throughout Oakville, South Mississauga, and communities across the Greater Toronto Area. Wherever you're located within our service area, you can expect the same commitment to craftsmanship, communication, and quality from start to finish.

Frequently Asked Questions

Hear From Our Customers