Deep sanitizing and disinfection is usually the last stage of a hoarding cleanup, after bulk debris and belongings have been sorted and removed. It covers what the removal crew leaves behind: surfaces contaminated by mold, pest activity, rodent droppings, biohazards, or months of trapped odor. In Ottawa, the 7 companies working in this space handle jobs ranging from a single bedroom that needs an odor treatment to a full home requiring subfloor sanitizing after severe animal or pest infestation.
The actual work can include enzymatic cleaning to break down organic waste and urine, HEPA vacuuming and air scrubbing to pull allergens and mold spores out of the air, hospital-grade disinfectant application on floors and walls, and in some cases ozone or thermal fogging to neutralize smoke or decomposition odor. It is a different skill set from general junk removal, and not every hauling company does it well.
When comparing providers, ask what disinfectant products they use, whether they test for mold or just spray over it, whether they carry biohazard handling training, and how they document the job (before/after photos, air quality readings). A company that can explain its process step by step is usually more reliable than one that just quotes a flat price over the phone.
Our rankings weigh licensing, equipment, documented process, and how companies respond to real sanitizing needs, not just general cleanup reviews. See the full breakdown in our methodology, or jump straight to the ranked guide to Ottawa hoarding cleanup companies to compare all 7 side by side.