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Bath, Kitchen

and Basement Renovations in London, ON

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35 Years of Industry Experience: Decades of construction expertise and long-standing relationships.

design-led renovation

Design-Led Renovation Planning: In-house interior design and rendering support for custom finishes.

Full service management

Full-Service Management: We handle all permits, inspections, and trade coordination for you.

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RenoMark Certified Standards: Quality backed by an industry-leading two-year warranty.

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London’s Local Experts in High-Craft Renovation & Design-Build

Built on Experience. Driven by Craft.

Founded in 2021 by Carisa and Garnet McCarty, McCarty Squared Inc. brings over 35 years of combined industry experience to every project. Completing 50–60 successful projects annually, our team is known for delivering high-quality renovations with precision and care.


Our core philosophy is simple: get the work right the first time. Whether we’re building a modern addition, transforming an entire home, or restoring a heritage property, we combine expert craftsmanship, transparent communication, and thoughtful planning to deliver results built to last.

Our Services

Standing Behind Our Work:

The McCarty Squared Warranty

We exceed RenoMark minimum standards to ensure your investment is protected long after the dust settles. Our commitment to quality means we stand firmly behind every nail and measurement.

Two-Year Contractor’s Warranty

We warrant materials and workmanship for two years from substantial completion; any defects due to faulty materials or labor are corrected at our expense.

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Full Product Coverage

All manufacturer and supplier warranties for materials and systems used on your project are fully conveyed to you.

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Preferred-Service Support

Existing customers receive priority post-project support and urgent response for any warranty-related needs.

Why Choose McCarty Squared?

Expert Guidance. Exceptional Results.

We provide a consultative, design-led experience for homeowners seeking high-detail execution and professional project management from concept to completion.

  • Historical Restoration Expertise: Applying master-level craftsmanship to preserve or replicate historical details.
  • In-House Design Support: Professional renders and design direction provided by our staff designer, Jen.
  • Turnkey Permit Management: We handle all paperwork, ESA, TSSA, and municipal inspections so you don’t have to.
  • Licensed Preferred Trades: We work exclusively with a retained team of master-level subcontractors held to our strict standards.
  • Transparent Estimating: A tiered approach (Class A & C) that provides budget clarity during the planning phase.
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Trusted Certifications & Industry Standards

Backed by recognized certifications, proven standards, and a commitment to quality in every project.

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Our Renovation Process & Estimates

A successful renovation starts with a clear process and transparent estimating, so you always know what to expect.

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RenoMark Certified Renovator

McCarty Squared Inc. is proud to be RenoMark-certified, a mark of trust for homeowners across Canada. This designation means we follow a strict code of conduct, meet high industry standards, and are committed to quality, transparency, and professionalism on every project.


As a RenoMark renovator, we provide clear contracts, reliable communication, proper licensing, and a minimum two-year warranty on our work. It’s one more way we give our clients confidence that their renovation is being handled with integrity, accountability, and lasting craftsmanship.

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Traditional Contractors

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Pricing Approach: Lowest-bid, often leading to hidden costs.

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Permits & Inspections:  Client often manages municipal hurdles.

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Design Support:  "Build only" with limited creative input.

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Subcontractors:  Shuffled, generic subcontractor handoffs.

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Craftsmanship:  Basic execution and standard finishes.

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McCarty Squared

White check mark inside a black circle.

Pricing Approach:  Quality-driven planning with transparent tiers.

White check mark inside a black circle.

Permits & Inspections:  We handle all permits, ESA, and TSSA filings.

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Design Support:  Design-led collaboration with 3D renderings.

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Subcontractors:  Retained, licensed preferred trades only.

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Craftsmanship:  Historical restoration-level detail and quality.

“McCarty Squared did a fantastic job renovating our house. Garnet and Carisa fully understood our vision, ensuring everything — kitchen, bathrooms and bedrooms — was perfect. We won't hesitate to call them for future projects. Highly recommend them!”

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Ziad A.

“Garnet and Carisa helped with my apartment overhaul in a 112-year-old house. They combined what I had hoped with new ideas I had never considered and provided exceptional workmanship to complete the project. They made me feel like family and my house is now truly a home.”

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Megan E.

“Garnet's professionalism, knowledge, and expertise are among the best in London. I've worked with six other contractors in the past nine years, and Garnet was by far my favorite. His precise assessment and detailed education on technical aspects were invaluable.”

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Jenny K. S.

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