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Basement finishing and renovation in Hamilton
Gravity Contractors finishes and renovates basements in Hamilton, Stoney Creek, Burlington and surrounding areas. We turn unfinished or dated basements into family rooms, home offices, gyms, guest bedrooms and bathrooms.
A basement has to be dry before it's finished. Hamilton has a lot of older homes, and we look for signs of water coming in, check grading and downspouts, and recommend fixes before framing so your new space isn't damaged later.
What a basement renovation can include
- Moisture assessment before work begins
- Framing, insulation and vapour control
- Drywall, ceilings and painting
- Pot lights, outlets and electrical work by a Licensed Electrical Contractor
- Basement bathrooms and laundry rooms
- Vinyl plank, laminate or tile flooring
- Egress windows for bedrooms (permit required)
- Stairs, trim and doors
What affects the cost of finishing a basement?
Basement projects vary more than most. The main factors are:
- Square footage and how many rooms you want.
- Adding a bathroom — especially if the drain is below the main sewer line.
- Ceiling height and how much ductwork and plumbing needs boxing in.
- Any waterproofing or foundation repairs needed first.
- Egress windows for bedrooms.
- Whether you're creating a separate dwelling unit, which has stricter code requirements.
Do you need a permit to finish a basement in Hamilton?
In most cases, yes. Building new walls, adding a bathroom, adding or enlarging windows, and creating a secondary suite generally require a building permit from the City of Hamilton. A basement apartment also has to meet Ontario Building Code and Fire Code requirements. Electrical work needs an ESA permit.
If your home has had basement flooding, ask the City of Hamilton about its Protective Plumbing Program, which has offered grants toward backwater valves. Check current eligibility with the City before planning around it.
More detail: Renovation permits in Hamilton — what needs one
Related services
Areas we serve
Hamilton, Stoney Creek, Ancaster, Dundas, Waterdown, Burlington, Grimsby and surrounding communities. See our service areas
Fully Insured
Liability insurance on every project — certificate available on request
Incorporated
A registered Ontario business based in Hamilton
Permits & Inspections
Built to the Ontario Building Code, with permits pulled where required
Why Clients Choose Us for Basement Renovations
Basement projects
Finished basement with pot lights and LED accent lighting 
Finished basement with vinyl plank flooring and pot lights 
Freshly painted finished basement with light flooring 
Basement drywall stage with pot light openings 
Basement before renovation with an exposed ceiling and stairs
How It Works
Basement Renovations FAQs
How long does it take to finish a basement?
Can you add a bathroom in my basement?
Can you build a legal basement apartment?
What if my basement gets damp?
100% Satisfaction Guarantee
If you're not completely satisfied with our work, we'll make it right — guaranteed. Every project is backed by our workmanship warranty, transparent pricing, and an insured team that stands behind its work.
Ready to Finish Your Basement?
Book a free on-site estimate. We'll check the space and give you a written quote.