Underpinning & Crawlspace Conversion

Maximize Space. Reinforce Foundations. Increase Home Value.
Expert Services by NC Construction & Waterproofing — Serving the Greater Toronto Area

Older homes across the GTA often include crawlspaces — shallow, underutilized spaces prone to moisture, mold, and structural issues. At NC Construction & Waterproofing, we specialize in transforming these outdated areas into full-height, dry, and usable basements through safe, engineered underpinning and crawlspace conversions.

Whether you’re looking to expand your living space, stabilize an aging foundation, or prepare your home for future additions, we provide tailored solutions backed by years of experience and full permit compliance.

What is Underpinning?

Underpinning is the process of strengthening and deepening an existing foundation. It's commonly used to:

  • Increase basement ceiling height

  • Support additions or renovations

  • Correct settling or foundation damage

  • Convert crawlspaces into livable basements

Our methodical, step-by-step approach ensures your home remains safe, supported, and code-compliant throughout the process.

Crawlspace Conversion: Build More Below

Crawlspaces are often cold, damp, and unusable. We convert these areas into full-height, dry basements that can be transformed into:

  • ✅ Legal basement apartments or in-law suites

  • ✅ Recreation rooms, gyms, or playrooms

  • ✅ Laundry, utility, or storage areas

  • ✅ Rental income spaces

Our Proven Process

  1. Site Evaluation & Engineering Plans
    We inspect your crawlspace and soil conditions, working with licensed structural engineers to design a safe, city-approved underpinning plan.

  2. Sequential Underpinning ("Pinning")
    Small sections of the foundation are excavated and reinforced with new concrete footings to deepen and support the existing structure.

  3. Crawlspace Excavation
    We remove soil to full basement depth while protecting the structural integrity of your home.

  4. New Concrete Floor Installation
    A durable concrete slab is poured to form the base of your new basement.

  5. Optional Waterproofing & Drainage
    Enhance protection with membrane systems, weeping tiles, sump pumps, and insulation.

  6. Final Inspections & Clean Finish
    All work is code-compliant and city-inspected. We leave the job site clean and ready for your next step — whether finishing, furnishing, or renting.

Why Choose NC Construction & Waterproofing?

  • ✔️ Fully Licensed & Insured

  • ✔️ Engineer-Designed Solutions

  • ✔️ Permits & Municipal Compliance Handled

  • ✔️ Clean, Respectful Job Sites

  • ✔️ Trusted Across the GTA

  • ✔️ Transparent Quotes – No Hidden Fees

We combine structural expertise with exceptional craftsmanship to deliver long-lasting, value-adding results.

Serving the Greater Toronto Area

Proudly helping homeowners in Toronto, Etobicoke, North York, Mississauga, Vaughan, Brampton, Scarborough, Markham, Oakville, and beyond.

Ready to Build?

Let’s transform your crawlspace into a full-height basement — stronger, drier, and ready for your vision.
Contact NC Construction & Waterproofing today for a free, no-obligation consultation.