Professional Laneway House & Garden Suite Foundation Contractors
Kome Waterproofing und Underpinning Inc. provides professional foundation construction for laneway houses and garden suites in Toronto and the GTA.
We specialize in excavation, concrete foundations, underpinning and waterproofing, ensuring your project is built on a strong, durable and code-compliant foundation.
What Is a Laneway House & Garden Suite?
A Laneway House is a detached residential unit built at the rear of a property with access from a public laneway.
A Garden Suite is a self-contained residential unit built in the backyard, even when no laneway access is available.
Both options:
Increase property value
Create rental income opportunities
Provide flexible living space for families
At Kome Waterproofing & Underpinning Inc., we build code-compliant foundations for laneway houses and garden suites across Toronto & the GTA.
Our Laneway House & Garden Suite Foundation Services
We offer complete, code-compliant foundation solutions for laneway houses and garden suites, including:
- Site inspection & layout
- Excavation & soil preparation
- Concrete slab foundations
- Strip footings & reinforced concrete foundations
- Underpinning (when required)
- Foundation waterproofing & drainage systems
- Backfilling & final grading
All work is performed in accordance with the Ontario Building Code and City of Toronto requirements.
Serving Toronto & the Greater Toronto Area
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Concrete Slab Foundation
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Ideal for garden suites
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Cost-effective and energy efficient
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Faster construction timeline
Types of Foundations We Build for Laneway Houses & Garden Suites
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Underpinning for Laneway Projects
Required when deeper foundations are needed
Increases structural strength
Fully compliant with Ontario Building Code
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Strip Footing & Foundation Walls
Common for laneway houses
Strong load-bearing capacity
Long-term structural stability
Foundation Waterproofing & Drainage
Every foundation we build is protected with professional waterproofing systems, including:
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Exterior waterproofing membranes
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Weeping tile drainage systems
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Foundation insulation
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Proper surface grading
This helps prevent water intrusion, cracks, and long-term structural damage.
Frequently Asked Questions – Laneway House & Garden Suite Foundations
Q : Do I need a permit for a laneway house or garden suite foundation?
A : Yes. All laneway house and garden suite foundations in Toronto and the GTA require proper building permits and must comply with the Ontario Building Code.
Q : What type of foundation is best for a garden suite?
A : Most garden suites are built on a concrete slab foundation, which is cost-effective, energy-efficient, and ideal for backyard construction.
Q : Do laneway houses require deeper foundations?
A :In many cases, yes. Laneway houses often require strip footings or reinforced concrete foundations, and sometimes underpinning, depending on soil conditions and design loads.
Q : Do you provide waterproofing for laneway and garden suite foundations?
A : Absolutely. Every foundation we build includes professional waterproofing and drainage systems to protect against moisture and water damage.
Q : How long does it take to build a laneway house foundation?
A : On average, foundation work takes 2–4 weeks, depending on excavation conditions, weather, and permit requirements.
Q : Do you work with builders and designers?
A : Yes. We regularly work with homeowners, builders, and architects to ensure foundations meet structural and design requirements.
Have more questions about laneway house or garden suite foundations in Toronto? Contact us for a free consultation.
Why Choose Kome Waterproofing and Underpinning Inc?
Licensed & insured
Extensive experience with Toronto bylaws and zoning requirements
High-quality concrete and professional-grade materials
Clear timelines and transparent pricing
Trusted foundation and underpinning specialists