Los Angeles County · For landlords and property managers
Mold Compliance for Los Angeles Landlords and Property Managers
California landlords must keep rentals habitable, and visible mold growth can be a substandard-housing condition under Health and Safety Code 17920.3. In practice, that means responding to complaints quickly, fixing the moisture source, removing the growth under proper containment, documenting every step and answering any code inspector before the deadline.
- Emergency24/7 response
- CoverageAll of Los Angeles County
- PricingWritten quote before work starts
- StandardANSI/IICRC S520
- Call(213) 659-0672
Your obligations
Is a landlord responsible for mold in California?
Usually, yes, when the mold comes from the building. Civil Code 1941 and 1941.1 require owners to keep rentals habitable. Since SB 655 took effect in 2016, visible mold growth is on the substandard-housing list in Health and Safety Code 17920.3, which gives health and housing inspectors authority over it.
There is one carve-out: minor mold on surfaces that normally get wet, like a shower, is not treated as substandard by itself. Growth on walls, ceilings, closets, window frames or behind cabinets is a different story, especially when it keeps coming back.
The California rules owners and managers should know
| Rule | What it means for an owner |
|---|---|
| Civil Code 1941 and 1941.1 | Rentals must be kept habitable |
| Health and Safety Code 17920.3 (SB 655) | Visible mold growth can be a substandard-housing condition |
| Health and Safety Code 26147 | Owners who know of mold that exceeds limits or threatens health must disclose it in writing |
| Civil Code 1942 | Tenants may use repair and deduct, up to one month’s rent, twice a year |
| Civil Code 1942.4 | An owner can owe damages after a code citation is left uncorrected |
| Civil Code 1942.5 | Retaliating against a tenant for a complaint is barred |
Plain-English summary only. Statutes change and the facts of each building matter.
For more detail on each statute, see our plain-English guide to California mold laws.
Jurisdiction
Which agency enforces mold rules at your building?
It depends on the address, not the mailing city. Inside the City of Los Angeles, the LA Housing Department (LAHD) handles complaints and runs the Systematic Code Enforcement Program (SCEP) for routine rental inspections. Most unincorporated areas fall to LA County Public Health. A few cities run their own programs.
| Where the building is | Who enforces | Contact |
|---|---|---|
| City of Los Angeles | LA Housing Department (LAHD) Code Enforcement | (866) 557-7368 |
| Unincorporated LA County and cities that adopted the County Health Code | LA County Public Health, Environmental Health | (888) 700-9995 |
| Long Beach | Long Beach Code Enforcement (own health department) | (562) 570-2633 |
| Pasadena | Pasadena Code Compliance (own health department) | (626) 744-8633 |
| Santa Monica | Santa Monica Code Enforcement | (310) 458-4984 |
| Vernon | Own health department | City health department |
| Glendale and Torrance | Not under County housing enforcement | Call city hall |
Confirm the right office for your parcel. Jurisdiction can change at a street boundary.
In the City of LA, LAHD contacts a complaining tenant within 72 hours, or 24 hours if the problem is urgent, and an owner can get up to 30 days to fix a cited condition. The deadline printed on your own notice is the one that counts.
First response
What should a landlord do when a tenant reports mold?
Acknowledge the report in writing, inspect promptly, find the water, and fix both the moisture source and the growth. Keep a dated record of each step. A fast, documented response protects the tenant, the building and you, whether or not an inspector ever gets involved.
- Log and acknowledge. Record the date, unit and what was reported. Reply in writing with when someone will look.
- Inspect the water path. Check the unit, plus the units above, below and beside it, risers and the roof where relevant. Moisture meters and thermal imaging find wet materials you can’t see.
- Test when it adds something. Lab testing helps when mold is hidden, the cause is disputed or you need records. Our apartment mold testing page explains when it’s worth paying for.
- Check for asbestos and lead. Most rent-stabilized buildings were built before October 1978. Sample before anyone cuts drywall, plaster or ceilings.
- Get a written scope. A quote by unit or by plumbing stack, from a CSLB-licensed contractor for any job over $1,000.
- Repair the source, then remediate. Fix the leak or ventilation problem, then remove growth under containment following IICRC S520. See mold remediation for apartment buildings for how occupied jobs are phased.
- Verify and close the file. Independent clearance testing confirms the work, and the report goes in the building file.
Citations and disclosure
What happens if your building gets a mold citation?
A citation or notice to comply lists the condition and a correction deadline. The agency, not the contractor, decides when the case is closed, after its inspector is satisfied. Your job is to finish real repairs in time and hand the inspector clear records of what was done.
The deadline
LAHD can give up to 30 days. Inspection, source repair, removal, drying and clearance all need to fit inside it.
The evidence
Repair invoices, before and after photos, moisture readings and a clearance report show the cause and the growth were both handled.
The cost of waiting
Under Civil Code 1942.4, an owner can owe damages after a citation stays uncorrected. Late repairs usually cost more, too.
Our step-by-step guide to responding to an LAHD or County mold citation covers timelines, the records to keep and how to prepare for re-inspection.
Do you have to tell tenants about mold?
Under Health and Safety Code 26147, part of the Toxic Mold Protection Act, owners who know of mold that exceeds limits or poses a health threat must disclose it in writing. California never adopted numeric exposure limits, which makes the rule harder to apply. Our page on California mold disclosure rules for landlords explains what is and isn’t settled.
The tenant side
What are LA tenants told about their mold rights?
Tenants are told to report mold in writing, take dated photos, and call the city or county for a free habitability inspection if nothing happens. They also learn that retaliation is barred and that repair and deduct exists. Knowing this helps you respond in a way that heads off a complaint.
- Written notice: many tenants send a dated letter. Treat it as the start of your timeline.
- Free inspections: LAHD and County inspectors inspect at no cost to the tenant. That is a habitability check, not lab testing.
- Retaliation: Civil Code 1942.5 bars retaliation for a complaint. Rent increases, notices or reduced services soon after a complaint draw scrutiny.
- Legal help: tenants are pointed to legal aid groups such as Bet Tzedek and to tenant lawyers.
Our mold guide for LA renters is written for tenants. Reading it shows you exactly what your residents see, and many managers share it when they respond to a complaint.
Finding the cause
Is the mold caused by the building or by how the unit is used?
Often both, and moisture readings are how you tell. A leak shows up as wet framing or drywall well away from where people cook or shower. Condensation shows up on cold surfaces, window frames and closet walls. Responsibility can depend on the cause, so record what the readings showed.
Building causes
Galvanized supply pipes and old drain stacks in pre-1960 buildings, flat roofs and decks that fail in winter storms, and bathrooms built with no exhaust fan, common in pre-1940 apartments.
Use and occupancy
Cooking, showering and drying clothes indoors in small units with windows kept shut. Coastal buildings also deal with marine-layer humidity through May Gray and June Gloom.
Even when occupancy plays a part, the fix often involves the building: adding or repairing an exhaust fan, improving airflow, or sealing a window. That is usually cheaper than arguing about it after a complaint.
Pricing
How much does mold remediation cost for a rental property in LA?
A typical single-unit job runs $1,500 to $6,000, and a small area under 10 square feet often stays between $500 and $1,500. Plumbing stacks, roof damage or whole-building work can reach $10,000 to $30,000 or more. Asbestos, lead and occupied units add cost.
| Service | Typical LA range |
|---|---|
| Visual inspection with moisture mapping | $250–$500 |
| Inspection with 2–3 air samples and an outdoor control | $400–$800 |
| Small remediation, under 10 sq ft | $500–$1,500 |
| Typical single-unit remediation | $1,500–$6,000 |
| Multi-unit, stack or structural job | $10,000–$30,000+ |
| Post-remediation clearance test | $300–$600 |
Typical industry ranges for the Los Angeles area. Your written quote depends on the size, access and materials involved. Plumbing, roofing, asbestos or lead work and rebuild may be priced separately.
Our Los Angeles mold remediation cost guide explains what moves a quote up or down.
Choosing a contractor
What should a property manager require from a mold contractor?
Ask for a CSLB license on any job over $1,000, a written scope before work starts, an accredited lab for any samples, and clearance by someone other than the remover. California doesn’t license mold inspectors, so licenses and documented methods are what separate contractors.
- CSLB license: verify it at cslb.ca.gov. The minor-work threshold rose from $500 to $1,000 in 2025.
- Asbestos credentials: CSLB asbestos certification plus Cal/OSHA (DOSH) registration for asbestos jobs over 100 sq ft.
- Lead-safe practices: disturbing paint in pre-1978 buildings falls under EPA RRP lead rules.
- Standard of work: containment, HEPA filtration and removal following ANSI/IICRC S520.
- Lab: an AIHA-LAP (EMLAP) accredited lab, with chain of custody on every sample.
- Paperwork for owners: certificates of insurance, unit-by-unit scope, tenant notice drafts and a closeout file.
Own a mixed-use building or an office property as well? Ground-floor retail, offices and restaurants have different scheduling needs, covered on our commercial mold remediation page.
FAQ
Questions from LA landlords and property managers
Is mold a code violation in California?
Visible mold growth can be. SB 655 added it to the substandard-housing list in Health and Safety Code 17920.3, except minor mold on surfaces that normally get wet, like a shower.
How long does a landlord have to fix mold in Los Angeles?
After an LAHD citation, an owner can get up to 30 days to fix the cited condition. The deadline on your own notice controls, so plan inspection, repairs, drying and clearance inside it.
Who pays for mold remediation in a rental?
Usually the owner, when the mold comes from the building, such as a leak or failed roof. Responsibility can depend on the cause, so document the moisture source. This isn’t legal advice.
Do landlords have to disclose mold to tenants?
Under Health and Safety Code 26147, owners who know of mold that exceeds limits or threatens health must disclose it in writing. California never set numeric limits, so ask a landlord-tenant attorney how it applies to you.
Can a tenant withhold rent or repair and deduct for mold?
Civil Code 1942 allows repair and deduct, up to one month’s rent, twice a year, under set conditions. Rent withholding is a separate legal question. A landlord-tenant attorney can advise on a specific case.
Does a mold contractor need a license in California?
Remediation that is part of construction work over $1,000 needs a CSLB license. Asbestos work needs CSLB asbestos certification, plus DOSH registration for jobs over 100 sq ft. Mold inspectors have no state license.
Will a clearance report close my code case?
Not by itself. Only the agency closes a case, after its inspector is satisfied. A clearance report, photos and repair invoices are the evidence you give the inspector.
Should I test for mold if I can already see it?
Not always. Visible mold needs removal either way. Testing helps when growth is hidden, the cause is disputed, you need records for an inspector or attorney, or you want clearance after the work.
Sources
- California Health and Safety Code 17920.3 (SB 655) and 26100–26156, including 26147; Civil Code 1941, 1941.1, 1942, 1942.4 and 1942.5
- LA Housing Department (LAHD): housing.lacity.gov
- LA County Public Health, Environmental Health: publichealth.lacounty.gov
- US EPA, mold guidance: epa.gov/mold
- Contractors State License Board (CSLB): cslb.ca.gov
- ANSI/IICRC S520, Standard for Professional Mold Remediation
Last updated November 2026. This page is general information for property owners and managers, not legal advice.
Have a tenant complaint or a notice on your desk?
Tell us the address, the unit and any deadline. We will trace the moisture, give you a written quote before work starts and document every step. Call (213) 659-0672, 24/7 across Los Angeles County.