Mold Compass Free mold guidance and practical resources
Tenant documenting mold with photos

How to Document Mold in Your Rental

A clear record can help you explain what happened, when you reported it, and what happened next if the issue escalates.

Use this record with the landlord escalation guide, retaliation guide, or lease-termination guide only after checking the state and local rules that apply.

What to Document

The Mold Itself

  • Location (room, wall, ceiling, etc.)
  • Size (measure or compare to common objects)
  • Color and appearance
  • Any musty or moldy odors
  • Moisture sources nearby
  • Any visible water damage

Related Conditions

  • Leaks or water intrusion
  • Humidity, condensation, and other moisture indicators (if available)
  • Ventilation issues
  • Previous water damage
  • Condensation on windows/walls
  • Any health symptoms, recorded separately from building observations

Photo Documentation Best Practices

  1. 1

    Use Good Lighting

    Mold can be hard to see in photos. Use natural light or a flashlight to ensure the mold is clearly visible.

  2. 2

    Take Multiple Angles

    Wide shots showing context, medium shots showing the affected area, and close-ups showing detail.

  3. 3

    Include a Reference Object

    Place a ruler, coin, or your hand in frame to show scale.

Written Communication Records

Create a Written Record

Email, a resident portal, or another method accepted by the lease or local rules can:

  • Record when the request was sent and any confirmation of receipt
  • Preserve a searchable copy of the request
  • Keep the record easy to organize and search
  • Can be shared with a legal or tenant-rights advisor

What to Include in Reports

  • Date you discovered the problem
  • Specific location of the mold
  • Description of what you observed
  • Any health symptoms
  • Request for inspection and remediation
  • Request for response timeline

Creating a Documentation Timeline

Keep a Mold Issue Log

Create a simple log or spreadsheet tracking:

Dates

When you discovered mold, reported it, and any follow-ups.

Communications

Every email, call, or in-person conversation with your landlord.

Responses

What your landlord said or did (or didn't do) in response.

Health Symptom Documentation

Track Your Symptoms

  • Keep a symptom diary with dates
  • Note when symptoms worsen (at home vs. away)
  • Document doctor visits related to symptoms
  • Get medical records if seeking treatment
  • Note if symptoms improve when away from home

Important Disclaimer

We cannot provide medical advice. If you're experiencing health symptoms, consult a healthcare provider.

Documentation of symptoms and medical visits can be relevant, but symptoms alone do not prove that a building caused them. Health causation is complex and should be discussed with a healthcare provider and, where relevant, a qualified legal advisor.

Professional Documentation

Consider additional documentation when it answers a defined question or when a local advisor recommends it. Professional sampling is not a universal prerequisite:

Mold Inspector

An independent inspection report may add context about moisture sources and affected materials, while dated tenant photos and repair records can still be useful.

When could testing change the plan? →

Medical Records

If claiming health impacts, documentation from healthcare providers is important.

Certified Mail

For a formal demand, use a delivery method accepted by the applicable lease or law and keep proof. Certified mail is one option, not a universal requirement.

Official Resources