Case Study: Basement Lowering for Added Living Space in Hamilton Century Home

Location: Hamilton, Ontario
Client: The Kline Family
Issue: Low basement ceiling height limiting usable living space
Service: Basement lowering (underpinning) with new concrete slab and waterproofing

The Challenge

The Kline family lived in a charming 1920s detached home in the St. Clair neighborhood of Hamilton. Like many older homes in the area, the basement ceiling was just under six feet tall, making the space unusable for anything beyond storage. With their growing family and limited room to expand above ground, the homeowners wanted to convert the basement into a legal secondary living unit.

They needed the ceiling height increased safely and professionally, along with updated waterproofing and flooring to support a finished living environment.

Our Solution

After structural assessment and engineering approvals, Direct Waterproofing recommended a full basement lowering with underpinning, combined with a waterproof slab and wall membrane system. This solution would allow the homeowners to gain additional headroom while securing the foundation and making the space suitable for future finishing.

Project Steps:

• Structural Planning & Permits: Coordinated engineering reports and City of Hamilton permits to ensure compliance with building codes for secondary units.
• Underpinning: Excavated and lowered the basement in alternating sections (known as the “benching” method) to maintain foundation stability while reaching the desired depth.
• Drainage System Upgrade: Installed a new interior weeping tile system and sump pit to manage moisture beneath the new slab.
• Concrete Slab Pouring: Poured a new concrete floor slab with vapor barrier and insulation, ready for future finishing.
• Wall Waterproofing: Applied a waterproof membrane along the interior foundation walls to prevent lateral moisture intrusion.

The Result

The project resulted in a new basement height of 8 feet, providing a bright, dry, and open space the family could confidently convert into a legal suite. The Klines are now in the final stages of turning the space into a rental unit that will supplement their income and increase their home’s value significantly.

Client Testimonial

“We were nervous about doing such a major renovation, but Direct Waterproofing made it seamless. The crew worked cleanly and efficiently, and the whole space feels like a brand-new part of the home. We gained an entire floor of living area.”
— The Kline Family, Hamilton

Frequently Asked Questions

1. What is basement lowering or underpinning?
Basement lowering involves excavating below your existing foundation to create more headroom. Underpinning supports the existing foundation while safely deepening the space.

2. How much height can I gain with basement lowering?
Most homeowners gain 2 to 3 feet of extra headroom, which can bring low-clearance basements up to modern livable standards.

3. Is this safe for older Hamilton homes?
Yes, when performed by experienced professionals with proper engineering and permits, it is completely safe. Many century homes in Hamilton undergo this process to unlock new living space.

4. Do I need permits for basement lowering?
Absolutely. Basement lowering is a structural renovation and requires both permits and engineering reports. We handle all approvals and documentation.

5. Can I rent out my lowered basement afterward?
Yes. Many homeowners complete this process to create legal basement apartments or in-law suites. We ensure all waterproofing and drainage meet city code for livable space.

To explore basement lowering options for your Hamilton home, visit our Basement Lowering Services page or schedule a free consultation with our specialists.