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Mold in a Rental Property: What Tenants Should Know

Finding mold in a rental property adds a layer of complication to an already worrying problem, because the home belongs to someone else and the responsibility for fixing it is shared. A tenant who finds growth on a wall, a musty smell in a room, or damp that will not dry needs to know who to tell, what to record, and what to do while waiting for a response. This guide explains mold in rental property California terms in general guidance only, and it gives no legal advice, because the rights and duties of tenants and landlords depend on the lease and the law, and a guide cannot settle them.

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The practical message is simple: tell the landlord or property manager first, document what you found in general terms, and do not disturb a large area of growth. The rest of this guide explains each of those steps, and what to do when the growth is large, hidden, or linked to a leak.

Tell the landlord or property manager first

The first step when a tenant finds mold is to tell the landlord or the property manager, in writing, as soon as possible. A written message creates a record of when the problem was reported, and it gives the landlord a clear description of what was found and where. Describe the growth in plain terms: where it is, how large it is, whether the wall or the floor feels damp, and whether there is a smell. Mention any leak or water loss you know about, and whether the problem is getting worse.

Do not wait to report it. A small patch can grow, a leak can worsen, and a problem that is reported early is usually a smaller job than one that is reported late. If the landlord does not respond, follow up in writing again, and keep a copy of every message you send. The written record is useful whatever happens next, and it is much easier to keep as you go than to reconstruct afterwards.

Document in general terms

Documenting the problem means keeping a simple record of what you found and when. Take photos of the growth, the damp, and any stain, from a safe distance and without disturbing a large area. Note the date you first noticed each sign, and note whether it has grown, spread, or changed since. Keep a copy of every message you send to the landlord or the property manager, and note the date of each one. If a leak is the cause, note when it started and what was done about it.

Keep the record simple and factual. It does not need to name the type of mold, because no one can do that from a photo, and it does not need to describe health effects, because that is a matter for a medical professional. What it needs is the facts: where the growth is, how large it is, when it appeared, and what has been done about it. That record is useful for the landlord, for the professional who comes to inspect, and for any later discussion about the property.

Mold in a Rental Property: What Tenants Should Know — California mold remediation guide

General guidance only, no legal advice

This guide gives general guidance only, and it gives no legal advice. The rights and duties of tenants and landlords in California depend on the lease, the type of tenancy, and the law, and they vary from case to case. A tenant who needs legal advice should speak to a legal professional or a tenant advice service, not to a mold guide. What this guide can say in general terms is that a tenant should report the problem promptly, keep a written record, and not disturb a large area of growth.

A tenant should also not try to fix a large problem alone, and should not agree to pay for work that belongs to the landlord without understanding the lease. If the growth is large, hidden, or linked to a leak, the inspection and the work that follows are matters for the landlord to arrange, and the mold inspection and testing page explains what an inspection covers in general terms. The mold remediation services in California cover the work that follows an inspection, once the scope has been settled.

What to do while waiting for a response

While waiting for a response, do not disturb a large area of growth, and do not try to clean it with household products. Keep the room ventilated where that is safe to do, and do not store belongings against a damp wall. If water is still coming in, and you can shut the water off safely from a dry place, do that, but do not enter a room with standing water or reach through water to get to a valve. If the growth is linked to a leak, note whether the leak is still running, because that is useful information for the landlord and for the professional.

If the landlord does not respond, follow up in writing, and keep a copy of every message. Homeowners and tenants in San Diego and across the state face the same steps, and the same rule applies to each: report early, document in general terms, leave a large area alone, and let a professional inspect the problem before any work is agreed.

Tenants, landlords and the written record

The written record is the part of a rental mold problem that is most often overlooked, and it is also the part that matters most, because it is the record of when the problem was reported, what was found, and what was done about it, and it is much easier to keep as you go than to reconstruct afterwards. A tenant who finds mold should tell the landlord or the property manager in writing, as soon as possible, and should describe the growth in plain terms, where it is, how large it is, whether the wall or the floor feels damp, and whether there is a smell, and should mention any leak or water loss, and whether the problem is getting worse. If the landlord does not respond, the tenant should follow up in writing again, and should keep a copy of every message, because the written record is useful whatever happens next, and it is the basis for any later discussion about the property. A tenant who finds mold should tell the landlord or the property manager in writing, as soon as possible, and should describe the growth in plain terms, where it is, how large it is, whether the wall or the floor feels damp, and whether there is a smell, because a written message creates a record of when the problem was reported.

It is also worth remembering that this guide gives general guidance only, and it gives no legal advice, because the rights and duties of tenants and landlords depend on the lease, the type of tenancy, and the law, and they vary from case to case, and a tenant who needs legal advice should speak to a legal professional or a tenant advice service, not to a mold guide. What this guide can say in general terms is that a tenant should report the problem promptly, keep a written record, and not disturb a large area of growth, and should not try to fix a large problem alone, and should not agree to pay for work that belongs to the landlord without understanding the lease, because those are the steps that protect the tenant, the home, and the record of what happened. While waiting for a response, a tenant should not disturb a large area of growth, and should not try to clean it with household products, and should keep the room ventilated where that is safe to do, and should not store belongings against a damp wall, because those are the steps that protect the tenant and the home.

Key Takeaways

The first step when a tenant finds mold is to tell the landlord or the property manager, in writing, as soon as possible.
Documenting the problem means keeping a simple record of what you found and when.
This guide gives general guidance only, and it gives no legal advice.
While waiting for a response, do not disturb a large area of growth, and do not try to clean it with household products.
The written record is the part of a rental mold problem that is most often overlooked, and it is also the part that matters most, because it is the record of when the problem was reported, what was found, and what was done about it, and it is much easier to keep as you go than to reconstruct afterwards.

Your Next Step

If this guide matches what you found at home, the next step is a visit — not a guess. Call and describe what you found, and the visit is arranged from what you describe. The Mold Inspection & Testing page explains what that service covers, and the Mold Remediation page explains what that service covers, and the services hub lists every service in one place.

While you wait, do not disturb a large area of visible mold, and keep the room aired where you can.

Keep the guides on this site bookmarked: the first guide, the signs guide, and the preparation guide cover the checks worth repeating — after moving in, and after bringing used fixtures home.

Mold remediation help is available across California. See mold remediation in Birdland, CA for one local example, or find your town on the service areas page.