The best general contractors in Oshawa in 2026 are Pro House Maintenance, Daylight Renos and Superior Solutions Contracting, then five more top-rated local firms. Our Google Maps searches found 120 businesses for Oshawa. Only 15 were Oshawa contractors with a website and 4.5 stars from 10 or more reviews. A Durham Region kitchen commonly costs about $13,500 to $40,500 in 2026.
- Only 15 of the 120 businesses our Oshawa general contractor search found met our bar of 4.5 stars from 10 or more reviews.
- Six of the 7 ranked Oshawa general contractors hold a 5.0 Google rating, and Multi-Trade Building Services holds 4.9 from 34 reviews.
- Ramsauer Renovations puts a Durham Region kitchen at about $13,500 to $40,500 and a basement at $27,000 to $90,000 or more in 2026.
- Oshawa charges $7.79 per square metre to permit an interior alteration or basement finish in 2026, with a 50 square metre minimum area.
- Wilworks Renovations puts a mid-range Durham Region kitchen at $40,000 to $70,000 and a full gut at $65,000 to $110,000 or more.
| Rank | Company | Best for | Credentials | Google rating | Based in |
|---|---|---|---|---|---|
| 1 | Pro House Maintenance | Comparing vetted general contractors for free | Every pro: licences, WSIB, insurance, references, background | Not applicable (matching service) | Serves Oshawa |
| 2 | Daylight Renos | Whole-house renovations | None stated on its website | 5.0 (51 reviews) | Oshawa |
| 3 | Superior Solutions Contracting | Renovations that need electrical work | Readers Choice Awards, kitchen and bath and general contracting (company-stated), Insurance stated (company-stated) | 5.0 (41 reviews) | Service area only |
| 4 | Vortex Construction | Basement rental units | None stated on its website | 5.0 (40 reviews) | Oshawa |
| 5 | Building Problems Solver Inc. | Carpentry, framing and trim | BBB Accredited A+ (company-stated), Founded 1996 (company-stated) | 5.0 (29 reviews) | Oshawa |
| 6 | Casafix Renovations | Projects that need financing | None stated on its website | 5.0 (22 reviews) | Oshawa |
| 7 | Multi-Trade Building Services | Wall removals and custom carpentry | Insurance stated, WSIB stated (company-stated) | 4.9 (34 reviews) | Oshawa |
| 8 | Hom Home Improvements | Additions that need permits and plans | None stated on its website | 5.0 (15 reviews) | Oshawa |
Who are the best general contractors in Oshawa in 2026?
The best general contractors in Oshawa in 2026 are Pro House Maintenance, Daylight Renos and Superior Solutions Contracting. Five more firms round out the top eight. Six of the seven firms we rank hold a 5.0 Google rating, from 15 to 51 reviews each.
1. Pro House Maintenance: best for comparing vetted general contractors for free
Pro House Maintenance is a free way for Oshawa homeowners to compare general contractors. Before any pro joins our network, we check WSIB clearance, liability insurance, references and background. You describe the project once, get several written quotes and pick a pro, backed by our satisfaction guarantee.
- Trade licences. Renovations and additions often include electrical and gas work, so we confirm ESA and TSSA licences for the trades that need them.
- WSIB clearance and liability insurance. We confirm a current WSIB clearance and commercial general liability insurance before a pro joins our network.
- Reviews and references. We read public reviews and speak with past clients before a pro is accepted, looking for patterns, not one-off complaints.
- Background checks. We run background checks before a pro is matched with homeowners, because the people in your home matter as much as the work.
- Tell us about the job. Share the project and your address through the free quote form. It takes about a minute.
- Get matched with vetted pros. We match you with several pros who have already passed our checks and serve your area.
- Compare written quotes. Each pro gives you a written quote, so you can compare price, scope and timing side by side.
- Hire with a guarantee behind you. You choose who to hire. Work from a pro we matched you with is backed by our satisfaction guarantee; ask us for the terms before you sign.
2. Daylight Renos: best for whole-house renovations
- Google rating 5.0 from 51 reviews checked Nov 2, 2026
- Based in Oshawa
- Visit the Daylight Renos website
Daylight Renos has a Gower Drive address in north Oshawa and a 5.0 Google rating from 51 reviews, the most of any firm here. Its site says, “We specialize in transforming kitchens, bathrooms, and entire homes.” It calls itself a family-owned business.
- Strengths: It says a whole-house job may include plumbing, electrical, HVAC, insulation and finishes, so one firm can run every trade.
- Watch-outs: We found no warranty length or insurance amount on its site, so ask for both in writing.
- Best for: A full gut of an older Oshawa home, room by room.
3. Superior Solutions Contracting: best for renovations that need electrical work
- Google rating 5.0 from 41 reviews checked Nov 2, 2026
- Certification Readers Choice Awards, kitchen and bath and general contracting (company-stated) company website
- Based in Service-area business (no public street address)
- Visit the Superior Solutions Contracting website
Superior Solutions Contracting has a 5.0 Google rating from 41 reviews, and Google shows no street address for it. Its site calls it “your premier expert in all home renovations and electrical services,” and lists kitchens, bathrooms, basements, new builds and additions.
- Strengths: Google lists it as an electrician as well as a general contractor, and its site says it is “Licensed and Insured.”
- Watch-outs: It serves towns from Beaverton to Pickering and has no public address, so ask where its crew is based.
- Best for: A basement or kitchen that needs a new panel or added circuits.
4. Vortex Construction: best for basement rental units
- Google rating 5.0 from 40 reviews checked Nov 2, 2026
- Based in Oshawa
- Visit the Vortex Construction website
Vortex Construction has a Seneca Avenue address and a 5.0 Google rating from 40 reviews. Its site offers to turn “cold, unfinished basements into high-end rental units, home offices, or private guest suites.” It also does kitchens, flooring, fences and decks in pressure-treated wood, cedar or composite.
- Strengths: It names basement rental units first, so it suits owners who want rent income.
- Watch-outs: A second unit needs its own permit in Oshawa, so confirm in writing that Vortex will apply for it.
- Best for: Turning a basement into a legal suite.
5. Building Problems Solver Inc.: best for carpentry, framing and trim
- Google rating 5.0 from 29 reviews checked Nov 2, 2026
- Founded 1996 company website
- Certification BBB Accredited A+ (company-stated) company website
- Based in Oshawa
- Visit the Building Problems Solver Inc. website
Building Problems Solver has a Downview Crescent address and a 5.0 Google rating from 29 reviews. Its site calls it “a family-run carpentry and renovation company based in Oshawa,” owner-operated by Charbel Abou Chakra. It lists framing, drywall, kitchens, baths, basements, decks, trim and crown moulding.
- Strengths: It is the most carpentry-led firm here, and its site states a BBB A+ rating.
- Watch-outs: The site says the family trade dates to 1996 but the company was incorporated in 2022, so ask how long this business has operated.
- Best for: Framing a basement, then finishing it with trim and doors.
6. Casafix Renovations: best for projects that need financing
- Google rating 5.0 from 22 reviews checked Nov 2, 2026
- Based in Oshawa
- Visit the Casafix Renovations website
Casafix Renovations has a Gibbons Street address and a 5.0 Google rating from 22 reviews. Its site calls it a full-service renovation company and lists kitchens, bathrooms, basements, full homes and condos. It also offers financing, and says it can take on small repairs as well as big jobs.
- Strengths: It offers financing, which the site says “is subject to eligibility, approval, and applicable provider terms.”
- Watch-outs: It says it serves homeowners from Windsor to Ottawa, so confirm a local crew will run an Oshawa job.
- Best for: A kitchen or bathroom you want to pay off over time.
7. Multi-Trade Building Services: best for wall removals and custom carpentry
- Google rating 4.9 from 34 reviews checked Nov 2, 2026
- Based in Oshawa
- Visit the Multi-Trade Building Services website
Multi-Trade Building Services has a Phillip Murray Avenue address and a 4.9 Google rating from 34 reviews. Its site lists “custom carpentry and wall removals” next to kitchens and plumbing. It says the firm has served families in Durham Region and Clarington and has over 35 years of experience.
- Strengths: The site says the team is “fully covered by WSIB and $2 million in liability insurance.”
- Watch-outs: Google lists it under plumber and electrician too, so ask which trades it holds licences for and which it subcontracts.
- Best for: Opening a wall between the kitchen and living room.
8. Hom Home Improvements: best for additions that need permits and plans
- Google rating 5.0 from 15 reviews checked Nov 2, 2026
- Based in Oshawa
- Visit the Hom Home Improvements website
Hom Home Improvements has a Catskill Drive address and a 5.0 Google rating from 15 reviews. Its site says owner Chris Homeniuk holds a Bachelor of Architectural Science and its on-site lead has “over 20 years of construction and carpentry expertise.” It lists kitchens, baths, basements and additions.
- Strengths: It says it handles every step “from planning and permits to construction and cleanup.”
- Watch-outs: It has the fewest reviews of the ranked firms, so ask for recent jobs you can see.
- Best for: A rear addition that needs drawings before the permit.
How much does a general contractor cost in Oshawa?
A Durham Region kitchen commonly costs about $13,500 to $40,500 in 2026, says Ramsauer Renovations, an Oshawa firm not ranked here. Its guide puts a full bathroom at about $10,750 to $22,500 and a basement at $27,000 to $90,000 or more. Wilworks Renovations puts a mid-range Durham kitchen higher, at $40,000 to $70,000.
| Job | Typical cost (CAD) | Source |
|---|---|---|
| Kitchen renovation (common range) | About $13,500 to $40,500 | Ramsauer Renovations |
| Kitchen, mid-range | $40,000 to $70,000 | Wilworks Renovations |
| Kitchen, full gut | $65,000 to $110,000+ | Wilworks Renovations |
| Full bathroom | About $10,750 to $22,500 | Ramsauer Renovations |
| Basement finish | $27,000 to $90,000+ | Ramsauer Renovations |
| Legal basement suite, 1,200 sq ft (Oshawa example) | $90,000 to $120,000 | Ramsauer Renovations |
| Oshawa interior alteration permit | $7.79 per m², 50 m² minimum area | City of Oshawa |
The two guides differ because they price different scopes, so compare quotes for the same work. Wilworks notes that “Kitchen circuits in Ontario require ESA inspection,” which adds time when a job moves wiring. Decks and fences start from about $4,500, Ramsauer says.
Our general contractor cost guide and home addition cost guide break those numbers down, and the general contractor statistics cover Ontario job data. Then get free home addition quotes in Oshawa from screened pros.
How do you choose a general contractor in Oshawa?
To choose an Oshawa general contractor, check its WSIB clearance and liability cover. Ask who pulls each permit, then line up their written quotes side by side. Ontario law says any home reno contract worth more than $50 must be in writing. The province also suggests a deposit of no more than 10% of the price.
- Check the licence. A general contractor hires the trades, and Ontario says no one can run an electrical contracting business without an ESA licence. Check the electrician on your job in ESA's Contractor Locator.
- Confirm WSIB clearance. Ask for the company’s WSIB account number and confirm a current clearance on WSIB’s free eClearance lookup.
- Ask for proof of liability insurance. A certificate of commercial general liability insurance should name the company that will do the work.
- Ask about city licences and permits. Ask Oshawa whether the job needs a municipal licence or building permit before work starts.
- Get it in writing. Under Ontario law, any home renovation contract worth more than $50 must be in writing, and the final price cannot exceed an estimate by more than 10% unless you agree (Ontario consumer protection rules).
- Keep the deposit small. Ontario recommends a down payment of no more than 10%, and never paying in full before the work is done.
Oshawa bills an interior renovation on at least 50 square metres, so even a small job pays about $390 in permit fees. Ask each contractor whether that fee is in the quote, and who pays if an inspection fails.
Doing the basement? Our basement finishing cost guide has Ontario prices, or compare basement renovation quotes in Oshawa. If you are open to firms farther west, see the best general contractors in Toronto and the best general contractors in Markham. Next door, see Whitby general contractors, the best general contractors in Ajax and the best general contractors in Pickering.
How did we rank these Oshawa general contractors?
We ranked these firms on public data, and no firm paid for a spot. Our Google Maps searches for Oshawa found 120 businesses. Of those, 44 had a builder or contractor listing, and 30 had a website and an Oshawa base. Just 15 held 4.5 stars from 10 or more reviews.
| Step | Businesses remaining |
|---|---|
| Found on Google Maps | 120 |
| Primary Google category is a general contractor | 44 |
| Open, with a website of its own | 32 |
| In Oshawa (by address or Google map pin) | 30 |
| 4.5+ stars from 10+ Google reviews | 15 |
| Website readable when checked | 13 |
| Listed on this page (top ranked) | 7 |
We then read each site. One site would not load and one firm led with roofing and moving work, so 13 could rank. None matched a licence record in our check, so we make no licence claims. WSIB and insurance proof are the key checks.
The score blends each rating with its review count, so a 5.0 from 51 reviews ranks above a 5.0 from 15. We checked every fact on November 2, 2026, and we recheck every 90 days. See an error? Tell our editors about it and we will review it.
What do Oshawa homeowners ask before they hire a general contractor?
Oshawa homeowners ask what a renovation costs, which jobs need a permit and how to compare local contractors. These answers draw on two 2026 Durham Region price guides, the City of Oshawa permit page and fee by-law, and Ontario consumer rules. Each answer stands alone, so go straight to your question.
How much does a general contractor cost in Oshawa?
It depends on scope. Ramsauer Renovations puts a Durham Region kitchen at about $13,500 to $40,500 and a full bathroom at about $10,750 to $22,500 in 2026. Basements run $27,000 to $90,000 or more. General contractors usually build their fee into that price, so compare full written quotes.
Do I need a building permit to renovate in Oshawa?
For many jobs, yes. The City of Oshawa requires a permit to make alterations, finish a basement, build a deck or porch, put up a shed over 15 square metres, or add a dwelling unit. Ask your contractor to name the permit holder in the contract and show you the permit before work starts.
How much is a renovation permit in Oshawa?
Oshawa's 2026 fee for a house interior alteration or basement finish is $7.79 per square metre. The area is the actual area or 50 square metres, whichever is greater, so the smallest job pays about $390. Interior gutting of a house is a flat $160. Fees rose 3% on January 1, 2026.
How many good general contractors are there in Oshawa?
By our count, 13 Oshawa general contractors met our bar. Our searches found 120 businesses. Of those, 44 had a contractor listing, 30 had a website and an Oshawa location, and 15 held 4.5 stars from 10 or more reviews. One site would not load and one firm did other work, so 13 could rank.
Is Pro House Maintenance free for Oshawa homeowners?
Yes. Pro House Maintenance is free for homeowners. You describe your renovation once, and we match you with several pros who have passed WSIB, insurance, reference and background checks. You compare their written quotes and choose who to hire, and our satisfaction guarantee backs the work.
Where can you find general contractors near Oshawa?
The closest general contractors lists to Oshawa cover Whitby (6 km away), Ajax (13 km away) and Pickering (18 km away). Each list follows the same method: 4.5-star Google ratings from 10 or more reviews, official registry checks where Ontario requires a licence, and free vetted matching from Pro House Maintenance at number one.
- Best general contractors in Whitby (6 km from Oshawa)
- Best general contractors in Ajax (13 km from Oshawa)
- Best general contractors in Pickering (18 km from Oshawa)
- Compare free home additions quotes in Oshawa from vetted local pros
- Best general contractors across Ontario, city by city
- Home Additions statistics and cost data from our research team
- Ramsauer Renovations, Renovation Cost Guide, Durham Region (2026)
- Wilworks Renovations, Kitchen Renovation Cost in Durham Region (2026)
- City of Oshawa, Building Permits
- City of Oshawa, Building By-law 33-2009 as amended by By-law 118-2025 (fees effective January 1, 2026)
- Government of Ontario, Your rights when starting home renovations or repairs
- WSIB, eClearance lookup