aMaximum Construction transforms unfinished basements into living spaces, in-law suites, and rental units across Toronto and the GTA. Licensed, insured, permit-managed.
Explore all our Basement Renovation services across the Greater Toronto Area.
We 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.
Professional services tailored to your needs and budget.
Framing to flooring — turn raw concrete into beautiful living space.
Second kitchen, separate entrance, full bathroom — legal rental unit.
Interior and exterior waterproofing, sump pump installation, drainage.
Custom media room with acoustic treatment, projector, wet bar.
Rubber flooring, mirrors, proper ventilation for home gym or office.
Basement lowering to increase ceiling height — we handle all engineering.
Our simple 4-step process — from first call to finished project.
We inspect your basement, check ceiling height, plumbing rough-ins, and discuss your goals.
Floor plan, scope of work, fixed quote. We apply for all permits.
Framing, insulation, electrical, plumbing, drywall — all trades coordinated by us.
Flooring, paint, trim, fixtures — final inspection and walk-through.
Get a free consultation and fixed quote — no obligation.
Book Free Consultation →We source quality materials and tools from leading construction retailers across Canada & North America.
We provide basement renovation services across the Greater Toronto Area. Select your location:
A basic basement finish (open concept, bathroom, flooring) starts around $35,000–$55,000. A full in-law suite with kitchen runs $75,000–$120,000+. We provide free quotes.
Ontario requires a minimum 1,950mm (6'5") ceiling height in living areas for a legal basement apartment. We can lower the floor (underpin) if needed.
Yes — with a proper permit and second-suite registration. We build to Ontario Building Code standards required for legal rental units.
Yes — any basement renovation involving framing, electrical, or plumbing requires a building permit in Toronto. We handle all permit applications.
A standard basement finish takes 8–14 weeks. In-law suites with kitchens may take 16–20 weeks depending on permit timelines.