Plumber Professional

Mailloux Mechanical Ltd.

Oldcastle, ON

Emergency ServiceTSSA Licensed

+1 519-626-4344 Website

1 Credential Verified

72out of 100

Trusted

ProScore

This score reflects 46 Google reviews, licensed and verified.

How is this calculated?

Score updated: Oct 2026

About Mailloux Mechanical Ltd.

AI-generated summary from ProScore data sources

Mailloux Mechanical Ltd. is a plumbing contractor in Oldcastle that handles repairs and installations, operating on weekdays.

Mailloux Mechanical Ltd.: ProScore 72, 2nd of 4 scored plumbers in Oldcastle.
46 Google reviews (4.9 stars; median 37) for Mailloux Mechanical Ltd., ahead of 2 of 3 plumbers.

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Ratings Across Platforms

Aggregated from independent sources. Only ProScore shows all.

1 source · 46 reviews

GoogleListing found

Google Business Profile reviews

4.9/5

46 reviews

Not found on 3 other platforms ProScore checks (Review platform B, BBB, Review platform C).

ProScore aggregates Google, the BBB and other major review platforms. Some sources are not named publicly.

How sources are weighted: ProScore methodology.

Things to Know

Trusted Level

Scores in ProScore’s Trusted tier — strong, consistent signals across the sources ProScore checks.

Highly Rated

Consistently rated 4.9 stars across 46 Google reviews.

TSSA Licensed

Licensed with the Technical Standards and Safety Authority — confirmed against the register.

24-Hour Service on 5 of 7 Days

Posted hours show 24-hour availability on some days only. Check the hours card for which.

Google Review Breakdown

46 total

Photos & Work

1 photo

Other top rated plumber in Oldcastle

Pro Trades Mechanical Inc.

Oldcastle

4.7(215)

Pannunzio Drainage Inc

Oldcastle

4.6(28)

Supreme Plumbing & Heating Inc.

Oldcastle

5(5)

Frequently Asked Questions

Is Mailloux Mechanical Ltd. licensed?

Yes, Mailloux Mechanical Ltd. holds a TSSA licence, verified by ProScore against the Technical Standards and Safety Authority database.

Does Mailloux Mechanical Ltd. have insurance?

WSIB insurance status is not verified for Mailloux Mechanical Ltd.. Request proof of workplace insurance and liability coverage before hiring.

What is Mailloux Mechanical Ltd.’s rating?

Mailloux Mechanical Ltd. has a ProScore Trust Score of 72/100 (Trusted), calculated from 1 data source including 46 Google reviews.

Where is Mailloux Mechanical Ltd. located?

Mailloux Mechanical Ltd. is a plumber serving Oldcastle, Ontario. You can reach them at +1 519-626-4344. View their full profile on ProScore for reviews and credentials.

Business Details

5347 Outer Dr, Oldcastle, ON N9G 0C4

Plumber

View on Google Maps

Hours

MondayOpen 24 hours

TuesdayOpen 24 hours

WednesdayOpen 24 hours

ThursdayOpen 24 hours

FridayOpen 24 hours

SaturdayClosed

SundayClosed

Services Offered

Drain cleaningPipe repairWater heater installationFixture installationEmergency plumbingLeak detection

Services & Info

Open 24 HoursEmergency Service

Offerings

Repair servicesInstallation service

Credentials

TSSA License

FS-R-52437

✓ Confirmed

Insurance

Not Confirmed

Credentials are as reported by contractors and public sources — verify each with the contractor and the issuing authority before hiring.Check it yourself: WSIB clearance · TSSA fuels contractor registry

Homeowner Guides

How much does this service cost in Ontario?Red flags when hiring Plumber FAQs in Oldcastle View all guides →

Data Transparency

Sources: Google and Ontario regulatory records
Score computed: October 13, 2026

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Checked by ProScore

What is the ProScore?

One score from 0 to 100 across every review platform and public registry ProScore checks. How the ProScore works

≥81

Elite

≥70

Trusted

≥54

Good

≥30

Basic

<30

Caution

—

Not yet rated

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Compare Plumbers in Oldcastle

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A ProScore is informational only — not a guarantee, endorsement, or recommendation — and the data behind it may be incomplete or out of date. Before hiring, independently verify all credentials, including licences, insurance (including WSIB) and references, directly with the contractor and the issuing authority. Full data notice. Something wrong? Let us know.