Construction companies · Ontario

Construction companies in Markham, ON

850 contractors in Markham with phone numbers, 224 with email addresses. Search the list, unlock the ones you want and start calling today.

Get the Markham list freeSee a sample
850
businesses
100%
have a phone number
26%
have an email address (224)
4.6★
average Google rating
Sample

A sample of construction companies in Markham

Twelve of the 850 contractors on the list. Phone numbers and emails unlock in the app — 1 credit per business, both together.

BusinessCategoryRatingWebsitePhoneEmail
Span-Co General Contracting Services LTD.Construction company5.0★Yes(905) •••-••••Available
Canadian Constructor Creations Inc.Construction company5.0★Yes(416) •••-••••Available
CAS Design & RenovationConstruction company5.0★Yes(647) •••-••••Available
Plus contractorHome builder5.0★Yes(416) •••-••••Available
Five Star Tree Services in Toronto, Richmond Hill & GTATree service4.8★Yes(416) •••-••••Available
D&H ContractingGeneral contractor5.0★Yes(647) •••-••••Available
Seaforth Building GroupConstruction company5.0★Yes(416) •••-••••Available
AIMG constructionSiding contractor5.0★Yes(647) •••-••••Available
Kam's Construction | Home Renovation in Markham & Richmond HillGeneral contractor5.0★Yes(647) •••-••••Available
GTA Paint & DecorPaint store4.7★Yes(905) •••-••••Available
Star Alliance Heating & Cooling IncHVAC contractor4.8★Yes(416) •••-••••Available
Cozy World Inc.HVAC contractor4.9★Yes(416) •••-••••Available

Showing 12 of 850. Data refreshed October 2026.

The market

What Markham's contractors look like

77% of rated contractors here hold 4.5★ or better — a competitive market where reviews are table stakes.
51 carry a perfect 5.0★ rating; 723 have no rating yet — prime prospects for review and reputation services.
278 (33%) have no website listed — a ready-made list for web design and SEO offers.
21% link a Facebook or Instagram page from their listing.

Most common listings

  • Construction Supplies Store179
  • General Contractor129
  • Home Improvement Service62
  • Carpet and Flooring Contractor46
  • Construction36
  • Construction company34

Area codes

  • (905)531
  • (416)136
  • (647)130
  • (289)12
  • (437)11
  • (888)9
Playbook

How to sell to contractors in Markham

This category covers general contractors, renovation firms, builders, excavators and concrete and framing companies. Projects are larger and longer, and the person you need is usually the owner or the estimator.

Who sells to contractors

  • Construction software (estimating, scheduling, takeoffs, project management)
  • Equipment rental and heavy-equipment dealers
  • Building-materials suppliers
  • Bonding, builder's risk and liability insurance
  • Accounting and job-costing firms
  • Subcontractor and trade recruiting

What keeps owners up at night

  • Cash flow between progress payments
  • Bidding accurately and winning the right jobs
  • Coordinating subs and keeping schedules
  • Labour shortages
When to reach themEarly morning, before site visits, or late afternoon. Winter is planning and bidding season in colder markets, which is a good time to sell software and services.
The angle that worksTalk about margin and schedule risk. "How much did your last job overrun?" opens more doors than "we save you time."
Reaching out in CanadaCold email to Canadian businesses falls under CASL, and phone outreach falls under the CRTC's telemarketing rules. A business address that's published publicly can support implied consent for messages relevant to that business, but every email still needs your identity and a working unsubscribe. Read our plain-English CASL guide and cold-calling rules before your first campaign.
FAQ

Questions about Markham contractors leads

How many construction companies in Markham, ON are in the database?
850 construction companies in Markham, ON, as of October 2026. 848 of them have a phone number and 224 have an email address.
How much does it cost to get these leads?
Every account starts with 25 free credits. Unlocking a contact (phone and email together) costs 1 credit. The Starter plan is $39/month for 2,500 credits — about 1.6¢ a contact — so the whole Markham list of 850 costs less than one month of Starter. See pricing.
Can I export the list to a dialer or CRM?
Yes. Unlocked contacts export to CSV, Excel or JSON with phone, email, website, address, category and rating, ready for any dialer or CRM.
Where does the data come from?
From public business listings — the same information contractors publish so customers can find them — cleaned, de-duplicated by phone number and refreshed regularly. Businesses can ask to be removed at any time.

Construction companies in other cities

Toronto, ONMississauga, ONOttawa, ONNorth York, ONBrampton, ONLondon, ONScarborough, ONOakville, ONAll construction companies →

Other businesses in Markham

HVAC companiesElectrical contractorsLandscaping companiesCleaning companiesDental clinicsLaw firmsMedical clinicsEverything in Markham →

Start calling Markham contractors today

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