Full basement finishing, in-law suites, and waterproofing in Etobicoke
aMaximum Construction transforms unfinished and outdated basements into beautiful, functional living spaces across Etobicoke. From cozy family rooms and home offices to full in-law suites, our team manages every aspect of your basement renovation — design, permits, construction, and final inspection.
Our process: 1) Free In-Home Consultation → 2) Design & Layout Planning → 3) Permit Application → 4) Waterproofing & Structural Work → 5) Rough-Ins (electrical, plumbing, HVAC) → 6) Insulation, Drywall & Finishing → 7) Final Inspection & Handover.
Basement renovation costs in Etobicoke typically range from $30,000–$60,000 for a full finish with standard materials, and $60,000–$120,000+ for premium finishes or an in-law suite with a second kitchen and bathroom. Contact us for a free, itemized quote specific to your Etobicoke basement.
A typical basement renovation in Etobicoke takes 8–14 weeks from permit approval to final inspection. Projects involving waterproofing, underpinning, or complex plumbing may take longer. We provide a detailed timeline before work begins.
Yes — finishing an unfinished basement in Etobicoke requires a building permit covering framing, electrical, plumbing (if adding a bathroom), and HVAC. aMaximum Construction files all permits and manages city inspections on your behalf.
Yes — aMaximum Construction designs and builds legal secondary suites and in-law apartments in Etobicoke basements, including egress windows, separate entrance, kitchen, bathroom, and all required permits for an Additional Dwelling Unit (ADU).
Book your free in-home consultation — we assess your Etobicoke basement and provide a detailed quote.
BOOK NOWWe are a licensed and insured general contractor serving Toronto and the GTA since 2018.
WSIB clearance, $2M liability insurance, and all permits handled. You are protected from start to finish.
Detailed written quote before any work begins. No hidden fees, no surprise invoices at the end.
We coordinate all trades under one contract. You deal with us — not a dozen different contractors.
Milestone-based schedule with regular updates. We show up when we say we will and finish when we say we will.
Written warranty on all work. We use quality materials and back every job with a workmanship guarantee.
Clean jobsite every day. We treat your home with respect — no mess left behind, no damage to surroundings.
Explore all our Basement Renovation services across the Greater Toronto Area.
We source quality materials and tools from leading construction retailers across Canada & North America.
Moisture must be addressed before any finishing work begins. We assess the source — whether exterior drainage, foundation cracks, or condensation — and recommend waterproofing solutions. Finishing over a wet basement leads to mould and material failure.
The most popular uses in Etobicoke are: legal rental apartment (best ROI), family recreation room, home office, home gym, and guest suite. The right choice depends on your family's needs, budget, and long-term plans for the property.
Yes. Ontario Building Code requires egress windows for any basement bedroom — minimum 0.35 m² openable area and no dimension smaller than 380mm. Egress windows are required for legal occupancy and for insurance coverage. We handle the installation as part of our basement renovation service.
Basement renovations in Etobicoke range from $30,000–$55,000 for a standard finish to $60,000–$100,000+ for a legal apartment with separate entrance. Key cost drivers include: bathroom addition, ceiling height, waterproofing requirements, and egress windows.
A standard basement finish in Etobicoke takes 6–10 weeks from permit approval to final inspection. A legal basement apartment with plumbing, separate entrance, and multiple rooms takes 10–16 weeks. We provide a detailed schedule at the start of every project.
In Etobicoke's climate, basement walls should have a minimum of R-20 insulation. We typically use rigid foam board (XPS) against the foundation wall, then batt insulation in the stud wall. This approach prevents thermal bridging and moisture accumulation.
To legally rent a basement apartment in Etobicoke, it must meet Ontario Building Code requirements: separate entrance, proper ceiling height, egress windows, interconnected smoke and CO detectors, and a second means of egress. We build legal secondary suites that meet all requirements.
A well-finished basement in Etobicoke typically adds 70–80% of renovation cost in home value, with legal apartments often returning more. In the current Etobicoke market, a legal secondary suite can add $80,000–$150,000 to your home's appraised value.
Ontario Building Code requires a minimum ceiling height of 1.95 metres (6'5") for habitable basement space in Etobicoke. If your existing ceiling is lower, options include lowering the floor (underpinning) or creative design around beams and ductwork.
Yes. In Etobicoke and across the GTA, finishing a basement requires a building permit. The permit process covers framing, electrical, plumbing, and insulation — all subject to inspection. We manage the permit process and schedule all required inspections.