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Best General Contractor Contractors in Newmarket, Ontario

Compare 10 verified general contractor contractors in Newmarket. Ranked by Google reviews, verification status, and customer satisfaction. Updated daily.

10 Businesses
0 Verified
4.9 Avg Rating
261 Reviews

General Contractor in Newmarket — What You Need to Know (2026)

Looking for the best general contractor contractors in Newmarket? Our directory lists 10 verified general contractor companies in Newmarket, Ontario, ranked by Google reviews and ratings. Compare general contractor contractors near Newmarket to find the right fit for your project.

General Contractor Cost in Newmarket (2026 Ontario Rates)

General Contractor cost in Newmarket varies by project scope, materials, and contractor experience. Ontario rates in 2026 reflect rising material costs and strong demand across the Golden Horseshoe. Get at least three written quotes from general contractor companies in Newmarket to ensure competitive pricing. Ask for a detailed breakdown of labour, materials, permits, and cleanup.

What to Look for When Hiring a General Contractor Contractor in Newmarket

When hiring a general contractor contractor in Newmarket, verify their credentials before signing. Check for WSIB (Workplace Safety and Insurance Board) clearance at wsib.ca, confirm liability insurance coverage of $2 million or more, and ask for references from recent projects in Newmarket or nearby communities. Licensed, insured, and Ontario Building Code compliant contractors protect your investment and your property.

Best Time for General Contractor Work in Newmarket

Timing matters for general contractor work in Newmarket. Ontario's seasonal weather patterns affect both scheduling and pricing. Book your general contractor project during shoulder seasons (spring or fall) for better availability and potential savings. Emergency services are available year-round, though expect premium rates during peak demand periods.

Every general contractor contractor in our Newmarket directory has a verified Google Business Profile with real customer ratings and reviews. Our marketing gap analysis helps you identify established companies with strong reputations versus newer entrants that may lack adequate documentation.

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General Contractor Market in Newmarket

10
Businesses Listed
4.9
Average Rating
261
Total Reviews
90%
With Websites
0%
Claimed Listings
45
Avg Gap Score

Rating Distribution

4.5+ Stars10
4.0-4.4 Stars0
3.5-3.9 Stars0
Below 3.5 Stars0

Data from 10 verified Google Business Profiles

#1
MCG Contracting
1228 Gorham St Unit 4, Newmarket, ON L3Y 8Z1
4.5(52 reviews)
#2
SONCE HOMES
253 Ben Sinclair Ave, East Gwillimbury, ON L9N 0Z1
5.0(50 reviews)
#3
Payne Contracting Inc
262 Lorne Ave, Newmarket, ON L3Y 4K4
5.0(38 reviews)
#4
Site Force One Contracting
York Simcoe and surrounding areas
5.0(31 reviews)
#5
Easy Basements
129 Coleridge Dr, Newmarket, ON L3X 2T5
5.0(25 reviews)
#7
Dephine Construction Inc
Newmarket, ON L3Y 2R8
5.0(14 reviews)
#8
STILE contracting + design
78 Main Street South, Newmarket, ON L3Y 3Y6
5.0(13 reviews)
#9
RENO BUILDING CANADA INC., Newmarket Branch1
650 Srigley St C, Newmarket, ON L3Y 3P9
4.9(11 reviews)
#10
RPM General Contracting
17817 Leslie St, Newmarket, ON L3Y 8C6
4.6(9 reviews)

Hiring a General Contractor in Ontario

Avg Job Value

$15,000

Peak Season

Year-round

What to Look For

  • WSIB and liability insurance
  • Detailed contract with payment schedule
  • Established sub-contractor relationships

Tips Before You Hire

  • 1.Verify they pull all required permits
  • 2.Ask for a detailed timeline with milestones
  • 3.Never pay more than 10% upfront deposit

General Contractor Cost Guide — Newmarket (2026)

Typical price ranges for general contractor work in Newmarket. Get at least 3 quotes to compare.

Kitchen Remodelcomplete
$15,000$35,000$75,000
Bathroom Remodelcomplete
$8,000$18,000$35,000
Basement Finishcomplete
$20,000$40,000$70,000
Additionper square foot
$150$250$400

Prices in CAD. Based on typical Ontario contractor quotes, 2026. Actual costs vary by scope, materials, and access.

General Contractor Licensing in Ontario

Required Licence

No single mandatory license, but must comply with OBC

General contractors should carry comprehensive liability insurance, WSIB, and pull all required permits. For new home construction, must be registered with Tarion.

Red Flags to Watch For

  • No WSIB
  • No liability insurance
  • Won't pull permits
  • Not Tarion registered for new builds
  • No written contract

Newmarket Homeowner Resources

Official municipal links for permits, bylaws, and services

City Hall

Town of Newmarket

905-895-5193

Building Permits

Apply for a Permit

905-953-5300 x2150

Better Business Bureau

Check BBB Ratings

416-644-4936

Electricity

Property Tax

Tax Information

Ontario Contractor Verification

Verify licences, insurance, and credentials before hiring

WSIB Clearance

Verify Contractor Coverage

1-800-387-0750

Electrical Safety (ESA)

Verify Electrician Licence

1-877-372-7233

HVAC/Gas (TSSA)

Verify HVAC Licence

1-877-682-8772

Consumer Protection

File a Complaint

1-800-889-9768

What to Book This Season

March — May in Newmarket

Roof inspection after winterEavestrough cleaningFoundation crack repairLandscaping and gradingHVAC tune-up (AC)Deck repair/staining

Spring is peak booking season. Contact contractors in February for the best availability.

Before You Hire a Contractor in Newmarket

  • Get at least 3 written quotes for comparison
  • Verify WSIB clearance certificate (protects YOU from liability)
  • Check Google reviews AND ask for local references
  • Confirm they will pull all required permits
  • Never pay more than 10-15% deposit upfront
  • Get everything in writing — scope, timeline, payment schedule
  • Verify their business insurance is current
  • For regulated trades (electrical, plumbing, gas), verify their license number

Ontario law: Ontario's Construction Act provides a 10% holdback right on construction projects. Learn more

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Frequently Asked Questions — General Contractor in Newmarket

How many general contractor contractors are in Newmarket?
There are currently 10 verified general contractor contractors listed in Newmarket, Ontario in our directory.
What is the average Google rating for general contractor contractors in Newmarket?
The average Google rating for general contractor contractors in Newmarket is 4.9 stars based on 261 combined reviews.
Do general contractor contractors need a licence in Ontario?
No single mandatory license, but must comply with OBC. General contractors should carry comprehensive liability insurance, WSIB, and pull all required permits. For new home construction, must be registered with Tarion.
Do I need a building permit for general contractor work in Newmarket?
Most general contractor work in Newmarket may require permits from the local building department. Your contractor should handle the permit process. Always confirm permits are included in your quote.
How much does general contractor work cost in Newmarket?
General Contractor costs in Newmarket vary by project. Kitchen Remodel: $15,000-$75,000 (complete). Bathroom Remodel: $8,000-$35,000 (complete). Get at least 3 quotes to compare.
How do I verify a general contractor contractor's insurance in Newmarket?
Request a current Certificate of Insurance and verify WSIB (Workplace Safety and Insurance Board) coverage at wsib.ca. This protects you from liability if a worker is injured on your property.
Do general contractors need to be registered with Tarion in Ontario?
Yes, if building new homes or condos. Tarion registration is mandatory for new residential construction in Ontario. For renovations, there's no mandatory licence, but the contractor should carry liability insurance, WSIB, and pull all required permits.
What is the 10% holdback rule in Ontario construction?
Under Ontario's Construction Act, you have the right to hold back 10% of each payment for 60 days after substantial completion. This protects you from subcontractor liens. Never waive this right — it's your strongest protection.
How long does a kitchen renovation take in Ontario?
A typical kitchen renovation takes 6-12 weeks from demolition to completion. This includes 1-2 weeks demo, 2-3 weeks rough-in (plumbing, electrical), 1-2 weeks drywall/flooring, and 2-3 weeks cabinets, countertops, and finishing. Permit approval adds 2-4 weeks upfront.

General Contractor Contractors in Nearby Cities

Last updated: April 3, 2026. Rankings based on Google reviews and verification status. Updated daily.

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