Toronto's Basement Underpinning Specialists
Underpinning services in King West
Rock Bottom Underpinning is Toronto’s dedicated basement lowering specialist. We transform low, underutilized basements into full-height, structurally sound living spaces through professional basement lowering in King West, helping increase your property value, usable square footage, and income potential.
15+
years of experience
1,000+ Projects
Successfully Completed
10-Year Warranty
Workmanship Guarantee
Fully Licensed & Insured
Professional & Code Compliant
Trusted basement underpinning specialists Serving homeowners in Toronto’s King West neighbourhood
If you own a home in King West, chances are your basement ceiling is between 6’0” and 6’5” — not ideal for modern living or rental use. Among King West’s condos and converted warehouses, pockets of Victorian row houses sit on original, low-ceilinged foundations, and underpinning lets you safely lower the floor and raise ceiling height to 8’0” or more, transforming the space into a functional living area or legal basement apartment.
Rock Bottom Underpinning specializes in basement lowering throughout King West and the downtown-west core, where downtown homes and converted properties require precision, experience, and structural expertise.
Most basement underpinning projects in King West take 4-6 weeks.
Every home is unique — especially the older row houses among King West’s newer builds — so an on-site assessment is essential.
If you’re considering raising your basement ceiling or lowering your basement in King West, we provide detailed on-site assessments to help you understand:
- Maximum achievable ceiling height
- Structural requirements
- Project cost range
- Timeline expectations
- Rental income potential
More Services
Basement Underpinning
Basement Walkouts
Basement Additions
Basement Renovation
Waterproofing
In-Floor Heating
Building Permits
Structural Beams
Who We Are
Not Just Any Contractor Underpinning Specialists
Rock Bottom Underpinning has spent over 15 years doing one thing exceptionally well: engineering and executing basement lowering projects across Toronto & the GTA.
We are not a general contractor. We don’t do kitchens, bathrooms, or cosmetic renovations. We are structural specialists and underpinning is in our name because it’s all we do.
From century homes in Leslieville to semi-detached properties in the Annex, we take on the complex urban projects that other contractors won’t. Our team works with structural engineers, handles all permits and inspections, and manages every phase of the process from excavation through to a finished, full-height basement.
Frequently Asked Questions
Rock Bottom specializes in foundation lowering, basement renovations, waterproofing, structural modifications, and home additions. We provide design, engineering, permits, construction, and project management under one roof, creating a streamlined process for homeowners.
Yes. We provide free consultations and estimates for most residential projects.
Yes. Rock Bottom is fully licensed and insured, and we carry the required coverage to protect our customers and our team.
We serve Toronto, downtown City core.