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Cornerstone Contracting Inc

Foundation Repair

Last updated: By Below-Grade Records Desk

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Cornerstone Contracting Inc has not claimed this listing. The form reaches WaterproofingIndex.

Cornerstone Contracting Inc

Photograph published by Cornerstone Contracting Inc on its Google Business Profile. WaterproofingIndex has not checked what it shows, and does not check any claim, offer or phone number printed inside an image.

  • Cornerstone Contracting Inc photo 2

Record

About Cornerstone Contracting Inc

Cornerstone Contracting Inc describes itself as a foundation repair contractor and covers Whitchurch-Stouffville.

Five stars from 5 of them. Google rates Cornerstone Contracting Inc at 3.9 over 7 reviews. Listed under Foundation Repair, Basement Walkouts & Entrances and Basement Waterproofing. Seven days of hours on record.

What its own website says it does

229 words of Cornerstone Contracting Inc's own pages were read. The below-grade wording found in them: basement waterproofing, wet basement, drainage systems, foundation repair, parging, window well.

Terms this site searched for, not the company's own sentences. WaterproofingIndex has not checked any licence, insurance, certification or warranty the company claims anywhere.

Method

WaterproofingIndex Score

55 / 100

This is the number every list on this site is ordered by. It is worked out the same way for all companies listed here, and the method page prints every point of it.

Reviews and reputation

22 / 40

  • Adjusted Google rating17 / 26
  • Review volume5 / 14

What it states on its own site

11 / 35

  • Years going11 / 11

    “Drainage Systems Trenching / Excavation Services Demolition Services 35 YEARS EXPERIENCE Foundation Repair Trenching / Excavation Services OUR CONTACT Corners”

Website and record

22 / 25

  • Website answered when we checked it10 / 10
  • Themes reviewers keep repeating6 / 6
  • Phone on file2 / 2
  • Hours posted2 / 2
  • Service areas stated on its site2 / 2

What it states on its own website

Read off this company's own pages on August 31, 2026. Each line is followed by the sentence it came from. WaterproofingIndex has not checked any of it against a registry, and for basement waterproofing in Ontario there is no registry to check.

  • Says about 35 years going

    “Drainage Systems Trenching / Excavation Services Demolition Services 35 YEARS EXPERIENCE Foundation Repair Trenching / Excavation Services OUR CONTACT Corners”

Themes running through this company's own reviews

Drawn from the Google reviews already stored on this record, against a fixed list of themes. Each one carries the reviewer's own words. These are what customers wrote, not a conclusion WaterproofingIndex reached, including the ones that are complaints.

  • Thorough workmanship

    “Quality workmanship and attention to detail”

  • Fair pricing

    “fair pricing and great communication”

  • Answers quickly

    “outstanding service & superior communication”

  • Shows up on time

    “arrive when they said they would”

  • Professional and courteous

    “Everyone one was friendly and respectful”

Pillar weights: reviews 40, what it states about itself 35, website and record 25.

Method

What we checked

4 of 5 signals present on this record.

  • Publishes a website
  • Has a phone number on the public record
  • Has 3 or more photos
  • Publishes opening hours
  • Has Google reviews
Its own website describes below-grade water work

Found on the company's own pages: basement waterproofing, wet basement, drainage systems.

Ontario licenses nobody for basement waterproofing, so there is no licence for this site to look up, and it does not verify insurance, WSIB clearance or any warranty a company offers. Nobody here has stood in one of these basements.

Method

Services

  • Foundation Repair
  • Basement Walkouts & Entrances
  • Basement Waterproofing

Reviews

What customers say

Highlights via Google reviews. Ratings are set by reviewers, not WaterproofingIndex.

  • 2 years ago

    “Fantastic customer service! Quality workmanship and attention to detail, fair pricing and great communication. Have already had them come back for a 2nd repair and planning on another later this year.”

    Manic· via Google reviews

  • 2 years ago

    “Andrew provided outstanding service & superior communication with fast & professional results”

    Smac· via Google reviews

  • 3 years ago

    “Kind souls 🔥🔥🔥”

    Ian· via Google reviews

  • 3 weeks ago

    “Was very happy with this company. Answered phone calls, arrive when they said they would, assess the problem and completed work quickly. Everyone one was friendly and respectful.”

    Janice· via Google reviews

Hours

Opening hours for Cornerstone Contracting Inc
Monday8 a.m.–5 p.m.
Tuesday8 a.m.–5 p.m.
Wednesday8 a.m.–5 p.m.
Thursday8 a.m.–5 p.m.
Friday8 a.m.–5 p.m.
SaturdayClosed
SundayClosed

Contact

Contact Cornerstone Contracting Inc

  • Cornerstone Contracting Inc has not claimed this listing, so no phone number is published for it. Request a quote and the form reaches WaterproofingIndex.
  • Visit website
  • 18 Ringwood Dr #5, Whitchurch-Stouffville, ON L4A 0N2
  • View on Google Maps

Coverage

Similar pros nearby

Cornerstone Contracting Inc: frequently asked questions

Is Cornerstone Contracting Inc well reviewed?

Cornerstone Contracting Inc: 3.9★ over 7 Google reviews. Read the newest reviews before you call.

Where does Cornerstone Contracting Inc operate?

Cornerstone Contracting Inc publishes no street address, and this site does not place it in a Greater Toronto Area neighbourhood on coordinates alone. Ask it which areas it covers.

How do I contact Cornerstone Contracting Inc?

Cornerstone Contracting Inc has not claimed this listing, so no phone number is published for it. Its website is linked above. The request form on this page reaches WaterproofingIndex.

What does Cornerstone Contracting Inc charge for foundation repair?

Cornerstone Contracting Inc sets its own prices. The GTA benchmark for interior crack injection, poured concrete wall, polyurethane is $750 to $1,000 per crack (DryShield (Toronto)), before 13% HST. Ask it for an itemised quote.