Best Mold Inspection & Testing in Ottawa, ON
16 companies listed · all 16 in Ottawa · 2 open 24/7 · 13 open weekends · 14 rated 4.5+
Data verified November 8, 2026
Ottawa Insulations
Enviropure Home
Artech Home Inspection
Barrhaven Home Inspectors Inc.
Property Inspection Network Ltd
Listed for homeowners in and around Ottawa, ON, these 16 companies test for mould and indoor air problems. Listings show what each one states about sampling, lab work and the environmental tests it offers, plus ratings and quotes from public reviews.

Area overview: Ottawa, ON
All 16 companies we list here are in Ottawa itself. We have 19 companies in Ottawa on file; this page shows the highest-rated 16. 15 of the companies on this page have a rating, from 4.1 to 5.0 across 1,295 reviews; 5 have 50 or more reviews and 14 are rated 4.5 or higher. The topics that come up most in reviews of the companies on this page are "professional", "cleanliness" and "knowledge". 2 are open around the clock; 13 are open on Saturdays and 9 on Sundays. 3 show a licence on their websites and 2 list staff certifications (InterNACHI and WETT). Domain records put 7 websites of the companies on this page at ten or more years old; the oldest dates from 1999. 2 offer emergency call-outs; 2 give free estimates and 1 lists coupons or special offers. We have a website on file for all 16 of the companies on this page; 11 publish a contact page; 13 list a public email and 3 take bookings online. We count these figures across the companies on this page; hours and prices change, so confirm the details with the company before you book.
Is one opinion enough on a damp problem?
Not when the first visit ends with a large removal quote attached. You have 16 companies on this page, so getting a second diagnosis is straightforward. Ask each one what it thinks the water source is. Two independent answers that match is the strongest signal you will get.



