Renovation & Construction Companies in Ontario
Ontario24 lists renovation and construction companies across Ontario and the GTA — kitchens, bathrooms, basements, flooring, additions, windows and doors. Search by city and specialty, compare your options and contact companies directly. Browsing is free and you do not need an account.
What renovation work costs in Ontario in 2026
Rough ranges for the most common projects, taken from our own 2026 cost guides. Treat them as a starting point for conversations with contractors, not a quote.
| Project | Cosmetic refresh | Mid-range | Major / luxury |
|---|---|---|---|
| Kitchen | $12,000–$30,000 | $25,000–$50,000 | $50,000–$100,000+ |
| Bathroom | $8,000–$15,000 | $15,000–$30,000 | $25,000–$70,000+ |
On a kitchen, cabinetry alone is usually 30–40% of the budget and labour plus permits another 30–50%. On a bathroom, labour — especially tiling and waterproofing — is the single biggest line, and permits run roughly $500–$1,500. Basements vary the most, because underpinning and structural work change the number sharply.
What moves the price most
- Scope creep. Moving plumbing or electrical costs far more than replacing fixtures in place.
- Material tier. Semi-custom cabinets, quartz and porcelain sit well above laminate and ceramic.
- Age of the house. Knob-and-tube wiring, galvanised pipe or asbestos found mid-project add both cost and delay.
- Permits and inspections. Structural, electrical and plumbing changes need them, and pulling them is the contractor’s job.
- Season. Winter bookings are often easier to get and sometimes cheaper than spring and summer.
What to check before you hire
- A written scope of work and payment schedule before anything starts.
- Liability insurance and WSIB coverage — ask for certificates, not verbal assurance.
- Electrical work done by an ECRA/ESA-licensed contractor.
- For certified trades, a licence you can look up on the Skilled Trades Ontario public register.
- A deposit no larger than 10–15% before work begins; anything more is worth questioning.
- References from projects of similar size, and photos of finished work rather than showroom shots.
Our guides go deeper: kitchen renovation cost in Ontario, bathroom renovation cost in the GTA and how to choose a contractor.
Browse renovation companies in Ontario
Frequently asked questions
Do I need a permit to renovate in Ontario?
Cosmetic work — paint, flooring, replacing fixtures in place — usually does not need one. Structural changes, moving plumbing or electrical, finishing a basement and adding or enlarging windows generally do. Your contractor should pull the permit, and the requirement is set by your municipality.
How long does a renovation take?
A cosmetic bathroom refresh is typically two to three weeks, a mid-range kitchen six to ten weeks including cabinet lead times, and a full gut with structural work several months. Add buffer: material delays are the most common reason for overrun.
Does Ontario24 check the companies listed here?
No. Ontario24 is a classified directory — we help you find, compare and contact local businesses directly, and we do not vet them. Verify licences, insurance and references yourself before you sign anything. Our safety tips explain what to check.