Transform Your Basement Into Usable Living Space
Basement lowering (also called benching or underpinning) is one of the most cost-effective ways to add square footage to your home. By lowering your basement floor, you can create comfortable ceiling heights that transform unusable storage space into beautiful living areas, home offices, rental suites, or recreational rooms.
Poseidon Concrete & Masonry has completed hundreds of basement lowering projects across London and Southwestern Ontario. We handle everything from initial engineering to final waterproofing, ensuring a seamless transformation of your basement.
Full Basement Lowering
Lower your entire basement floor by 12-24 inches or more. Gain the ceiling height needed for comfortable living spaces while increasing your home's value significantly.
Basement Walkout Conversions
Transform your basement into a separate entrance suite with a new walkout access. Perfect for rental income, multi-generational living, or simply better basement access.
Basement Entrance Construction
New concrete stairs, retaining walls, and entrance structures for walk-up or walk-down basement access. Includes proper drainage and waterproofing.
Benching & Partial Lowering
Selectively lower specific areas of your basement for utilities, laundry rooms, or to create step-down living spaces with architectural interest.
Benefits of Basement Lowering
- Increase Home Value: Add 600-1000 sq ft of livable space at a fraction of the cost of an addition
- Rental Income: Create a legal basement apartment with proper ceiling heights
- Energy Efficiency: Modern insulation and construction improve your home's thermal performance
- Better Functionality: Full-height basements are more comfortable and functional for daily use
- Building Code Compliance: Achieve minimum 6'7" ceiling heights required for living spaces in Ontario
Our Basement Lowering Process
1. Engineering & Permits
Structural engineer assessment, detailed plans, and all necessary building permits. We handle the paperwork.
2. Foundation Underpinning
Strengthen and extend your foundation walls in sections to support the deeper excavation safely.
3. Excavation & Removal
Careful excavation and removal of existing basement floor and soil. Typically 12-24 inches of depth added.
4. New Floor & Waterproofing
Pour new concrete floor with proper grading, vapor barrier, and connection to perimeter drainage system.
Typical Project Timeline & Costs
Timeline: Most basement lowering projects take 3-6 weeks depending on size and complexity. This includes underpinning, excavation, new floor installation, and waterproofing.
Investment: Basement lowering is a major renovation but offers exceptional ROI. Cost varies based on basement size, existing foundation condition, soil type, and whether you're adding walkout access. Contact us for a free detailed estimate specific to your home.
Ready to Add Living Space?
Get a detailed assessment and cost estimate for your basement lowering project
Request Free ConsultationOr call (519) 607-1453