Short answer: The "five stages of hoarding" usually refers to the Institute for Challenging Disorganization's Clutter-Hoarding Scale. It rates a home, not a person, from Level I (green, little or no clutter) to Level V (red, severe), based on exits, utilities, pests, sanitation and how usable the rooms are. It's an observational tool, not a medical diagnosis.
If you're searching for this, you're probably trying to judge how serious a situation is: a parent's house, a rental unit, an estate you've inherited. The "five stages" language you see online comes from a tool built for professional organizers and related professionals, not from a medical manual. Knowing what it measures, and what it doesn't, helps you decide what kind of help the home needs.
Where the five levels come from
The Institute for Challenging Disorganization (ICD) publishes the Clutter-Hoarding Scale, a free observational guide for assessing residential environments. Its five levels run from Level I (green, minimal clutter) to Level V (red, extreme clutter). Here is a plain-language summary based on ICD's current Quick Reference Guide:
| Level | Color and ICD label | What it generally looks like |
|---|---|---|
| I | Green, low | A standard household. Doors, stairs and windows are accessible, plumbing, electrical and heating work, smoke and carbon monoxide detectors work, and there is no sign of pests. |
| II | Blue, guarded | Clutter gets in the way of some daily functions. One major exit may be blocked, some appliances or systems aren't fully working, there may be light to medium signs of household pests, and housekeeping is inconsistent. |
| III | Yellow, elevated | Clutter around exits, hallways and stairs. At least one room can't be used for its purpose. Obvious odors, heavily soiled kitchen or bathroom surfaces, light insect infestation and possibly light structural damage. |
| IV | Orange, high | Several rooms can't be used, access to exits is restricted, flammables may be stored improperly, and there may be rotting food, visible mold or standing water, rodents in the attic or basement, and long-standing water or structural damage. |
| V | Red, severe | Exits, hallways and stairs are blocked, key living spaces can't be used, toilets and sinks don't work, human waste may be present, and there may be heavy infestation, pervasive mold and serious damage to the structure. |
The full guide lists specific checkpoints for each level. ICD treats Level III as the pivot point between a home that is cluttered and one that may need the deeper considerations of working in a hoarded environment.
The five things the scale looks at
ICD rates each home across five categories:
- Structure and zoning: access to entrances and exits, whether plumbing, electrical and heating and cooling work, and structural integrity.
- Animals, wildlife, pets and pests: animal care and evidence of rodents, insects or other pests.
- Household functions: whether rooms are safe and usable for their intended purpose.
- Health and safety: sanitation and how medications are stored.
- Personal protective equipment: what anyone working in the home should wear, from optional basics at Level I to full protective gear required at Level V.
A home doesn't always fit neatly into one level. The living room might look like Level II while the kitchen or basement is much worse, so look at the whole property, including the garage and yard, before settling on a rating.
A scale for homes, not a diagnosis for people
ICD says plainly that the scale isn't meant for clinical diagnosis or to evaluate a person's behavior. It focuses on environmental severity and how the home functions, independent of any psychiatric diagnosis.
Hoarding disorder itself is a recognized mental health condition. The American Psychiatric Association describes it as persistent difficulty parting with possessions because of a perceived need to save them, with clutter that keeps living areas from being used as intended. Only a mental health professional can diagnose it. A Level IV home doesn't automatically mean the person has hoarding disorder, and someone with the disorder may live in a home that rates lower. The International OCD Foundation explains how hoarding disorder differs from clutter, collecting and squalor, and lists treatment resources.
What changes as the level goes up
As the level rises, the risks shift from the person's comfort to the safety of everyone in and around the home.
- Fire and escape: The National Fire Protection Association (NFPA) says blocked exits often prevent escape in hoarding fires, and responding firefighters face obstructed exits, falling objects and heavy fire loading that can lead to collapse. Neighbors next door can be affected quickly by smoke and fire.
- Heat sources: The U.S. Fire Administration warns that belongings crowding stoves and heaters create fire risk and advises keeping anything that can burn at least 3 feet away from them.
- Falls and injuries: NFPA notes that many people in hoarded homes are hurt when they trip or when materials fall on them.
- Sanitation and pests: ICD's guide adds spoiled food, animal waste and insect infestation at Level III and above, which brings odor, contamination and rodents.
- Moisture and structure: Water-damaged floors, standing water, mold and long-standing structural damage show up at Levels IV and V.
How severity shapes the cleanup plan
Knowing the approximate level helps you match the help to the home:
- Levels I and II: Often handled with support from family or a professional organizer, with the person making the decisions. ICD's guide lists light protective gear such as gloves and shoe covers at Level II.
- Level III: ICD says anyone working at this level should have advanced knowledge of chronic disorganization and a network of resources, especially mental health professionals. Its gear list adds masks or respirators, eye protection and coveralls.
- Level IV: ICD calls for a coordinated team, which may include organizers, health professionals, social workers, pest and animal control, biohazard cleaners and licensed contractors.
- Level V: ICD says intervention is required and formal written agreements should be in place before work begins. Building, zoning, fire or safety agencies may be involved, and legal issues are common.
From a cleanup standpoint, higher levels mean more protective equipment, more biohazard handling, deeper sanitizing and odor treatment, and more repairs once the space is clear. Our hoarding cleanup process and safety guide explains those stages in order, and our hoarding cleanup and property restoration page covers the services involved.
What to do next
If you're assessing a loved one's home, go gently. Walking through with a clipboard can feel like an inspection. Start with the issues ICD flags early, such as blocked exits, missing smoke and carbon monoxide detectors and belongings crowding heaters, because those are safety fixes most people can agree to.
Bring in professionals when you see signs of Level III or higher: rodents or insects, human or animal waste, mold, standing water or structural damage. Contaminated materials need proper protective gear and handling, which is where biohazard cleanup comes in. If the person still lives there, their consent and involvement should set the pace.
ServiceMaster Restoration Services has IICRC-certified technicians and serves DuPage and Will County. We can walk through the home with you, explain what we see and outline a plan. Call (630) 241-1111, 24/7.
More questions
Is the Clutter-Hoarding Scale free to use?
Yes. ICD offers the full scale and a Quick Reference Guide at no charge on its website, in several languages. It permits copying for educational, not-for-profit purposes with credit to ICD; commercial use requires written permission.
Can I rate a home myself with the scale?
You can use it as a checklist to spot safety and sanitation problems. ICD designed it for professional organizers and related professionals, so treat your own rating as a rough guide and let a professional confirm it before making big decisions.
Does Level V mean the house will be condemned?
Not necessarily. ICD notes that people living in Level V conditions may be involved in legal proceedings such as eviction or condemnation, but that isn't automatic. Whether the structure can be repaired depends on the damage, which a contractor or building inspector should evaluate.
Do the five levels match stages of hoarding disorder?
Not exactly. The levels describe the condition of a home at one point in time, not the progression of a mental health condition. A clinician assesses the person; the scale assesses the space.
Sources
- ICD Clutter-Hoarding Scale (Institute for Challenging Disorganization)
- Clutter-Hoarding Scale Quick Reference Guide (Institute for Challenging Disorganization)
- What is Hoarding Disorder? (American Psychiatric Association)
- Hoarding Disorder Resources (International OCD Foundation)
- Hoarding (National Fire Protection Association)
- Hoarding and Fire Safety (U.S. Fire Administration)