The 5 Levels of Hoarding and What Each One Needs
Last updated: October 14, 2026
Hoarding is measured on five levels, from Level I (Green, Low) to Level V (Red, Severe), on the Clutter-Hoarding Scale published by the Institute for Challenging Disorganization. The institute treats Level III as the pivot point between a cluttered home and a hoarded one. Here's what each level looks like and the cleanup it calls for.
The Short Answer
Levels I and II are clutter that a family can work through. Level III is the turning point, with pests, soiled kitchens and bathrooms, and clutter near exits. Levels IV and V bring rodents, mold, rotting food, failed plumbing, and, at Level V, human waste, which needs professional biohazard cleanup.
The Five Levels at a Glance
| Level | Name | Key signs |
|---|---|---|
| I | Green, Low | Exits and systems work, detectors installed, no pests, no lingering odors |
| II | Blue, Guarded | One major exit blocked, some appliances failed, light pest activity, moderate odors, visible pet waste |
| III | Yellow, Elevated | Outdoor clutter, HVAC down a season or more, audible pests, heavily soiled toilets and food surfaces, overflowing garbage, clutter near exits |
| IV | Orange, High | HVAC out over a year, water damage or sewer odor, rodents in attic or basement, rotting food, visible mold, exits blocked |
| V | Red, Severe | Failed water or sewer, unreliable electrical, pervasive vermin, human waste, pervasive mold, hazardous air, hidden hazards |
Levels I and II: Clutter
A Level I or II home is cluttered, but the house still works. At Level II, one major exit may be blocked, some appliances may have failed, and light pest activity or pet waste shows up. These homes can be cleared with sorting, hauling, and regular cleaning. A family working on a schedule, or a junk removal crew, can handle it.
Level III: The Pivot Point
Level III is where clutter becomes a hoard. The scale lists audible pests, a light infestation, heavily soiled toilets and food surfaces, overflowing garbage, unhealthy air quality, and clutter building up near exits. At this level, the cleanup needs protective gear, separate bagging of contaminated material, and disinfection, not just hauling.
Levels IV and V: Biohazard Conditions
Levels IV and V are biohazard conditions. Level IV brings rodents in the attic or basement, rotting food, visible mold, water damage or sewer odor, and blocked exits. Level V adds pervasive vermin, human waste, failed water or sewer systems, unreliable electrical service, and air the scale calls hazardous. These homes need a crew that ventilates, wets down, bags, removes contaminated flooring and drywall, and disinfects every room.
What Each Level Costs to Clear
Cost rises with the level, because each step up adds contamination work. HomeGuide's national range is $1 to $2 per square foot for hoarding cleanup, with lower levels near the bottom and contaminated homes at or above the top. Fixr notes some professionals charge $1,000 a day for severe homes. A written estimate after a walkthrough is the only way to price a specific house.
Frequently Asked Questions
What is a Level 3 hoarder house?
A Level 3 hoarder house is one where clutter has started to affect health and safety. At Level 3, mice or insects can be heard in the walls, the kitchen and bathroom are dirty enough to be unsanitary, garbage spills past its cans, and piles creep toward the doors. Heating or cooling may have been broken for a season. The scale's authors treat this as the point where a cluttered home becomes a hoarded environment.
What is the worst level of hoarding?
Level V, labeled Red and Severe, is the worst level on the Clutter-Hoarding Scale. A Level V home has pervasive vermin and heavy infestation, human waste, rotting food, pervasive mold, failed water or sewer systems, unreliable electricity, blocked exits, and hazards hidden by clutter. A Level V home needs professional biohazard cleanup, and the people living there need somewhere safe to stay during the work.
Who created the Clutter-Hoarding Scale?
The Institute for Challenging Disorganization publishes the Clutter-Hoarding Scale and updates it, with its most recent quick version dated March 2026. The scale rates a home on structure, pests and animals, sanitation, and safety. Each home gets one of five color-coded levels, from Green at Level I to Red at Level V, so families and cleanup crews can describe the same home the same way.
Can a hoarded home go down a level after cleanup?
Yes. A professional cleanup takes a home from its current level back to Level I by removing the clutter, the contamination, and the damaged materials. Keeping it there takes ongoing support for the person living in the home, which can include family help, a professional organizer, and mental health care. A cleanup addresses the house, and the support addresses what led to it.
How do I know what level my parent's home is?
Walk through the home and compare it with the scale's signs for exits, appliances, pests, odors, kitchen and bathroom condition, and mold. If you see audible pests, overflowing garbage, or heavily soiled toilets, the home is at least Level III. Rodents in the attic, rotting food, or visible mold put it at Level IV. A professional walkthrough confirms the level and the work it needs.
Get a Free Estimate in Palo Alto
If a home is at Level III or above, call 123-456-7890 for a free walkthrough and a written estimate. Read about our biohazard hoarding cleanup work, or see how we handle a hoarder clean out in Palo Alto.