Construction companies · Ontario

Construction companies in St. Thomas, ON

114 contractors in St. Thomas with phone numbers, 19 with email addresses. Search the list, unlock the ones you want and start calling today.

Get the St. Thomas list freeSee a sample
114
businesses
100%
have a phone number
17%
have an email address (19)
—
average Google rating
Sample

A sample of construction companies in St. Thomas

Twelve of the 114 contractors on the list. Phone numbers and emails unlock in the app — 1 credit per business, both together.

BusinessCategoryRatingWebsitePhoneEmail
Kaz Kitchen CabinetsConstruction Supplies Store—Yes(519) •••-••••Available
Kettle Creek LandscapingConstruction Supplies Store; Home Service—Yes(519) •••-••••Available
MD ElectricConstruction Supplies Store—Yes(519) •••-••••Available
County Lines HVAC & FireplacesConstruction Supplies Store—Yes(519) •••-••••Available
Jumbo Renovations LtdConstruction Supplies Store—Yes(519) •••-••••Available
Mahoney AsphaltConstruction Supplies Store—Yes(226) •••-••••Available
D H P ContractingDoors and Windows Contractor; General Contractor—Yes(519) •••-••••Available
New Day Excavation IncGeneral Contractor—Yes(226) •••-••••Available
Streib Trucking & Excavating LtdGeneral Contractor; Mover—Yes(519) •••-••••Available
Klassen ConstructionGeneral Contractor; Painter—Yes(519) •••-••••Available
Ambrose Plumbing & HeatingConstruction Supplies Store—Yes(519) •••-••••Available
Cliff's Overhead DoorsConstruction Supplies Store; Home Service; Repair Service—Yes(519) •••-••••Available

Showing 12 of 114. Data refreshed October 2026.

The market

What St. Thomas's contractors look like

0% of rated contractors here hold 4.5★ or better — there is room for businesses that push for reviews.
0 carry a perfect 5.0★ rating; 114 have no rating yet — prime prospects for review and reputation services.
47 (41%) have no website listed — a ready-made list for web design and SEO offers.
18% link a Facebook or Instagram page from their listing.

Most common listings

  • General Contractor36
  • Construction Supplies Store33
  • Carpenter6
  • Home Improvement Service4
  • General Contractor; Heating, Ventilating and Air Conditioning Contractor3
  • Carpet and Flooring Contractor3

Area codes

  • (519)105
  • (226)7
  • (780)1
  • (438)1
Playbook

How to sell to contractors in St. Thomas

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 St. Thomas contractors leads

How many construction companies in St. Thomas, ON are in the database?
114 construction companies in St. Thomas, ON, as of October 2026. 114 of them have a phone number and 19 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 St. Thomas list of 114 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, ONMarkham, ONAll construction companies →

Start calling St. Thomas contractors today

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