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Is my Property in the Methane Zone? – LADBS Methane Mitigation

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Is my Property in the Methane Zone? – LADBS Methane Mitigation

Methane Mitigation is becoming a frequent requirement when developing in Los Angeles. The Methane Gas Hazard requirements for a project are based on the results of the LADBS Methane Soil Gas Test.


A Methane Test is required if your project is located within the LADBS Methane Zone. To ensure that the Mitigation Construction requirements are not overlooked during the planning and budgeting phase, the below step-by-step process will guide you through establishing whether your Property is located within the Methane Zone.


Using Zimas to define Gas Hazard Types

The first step is to visit www.Zimas.com. Zimas is an online database that has been established by LADBS to provide information regarding parcels within Los Angeles City. Enter the address number and street name as requested, do not add any prefixes or suffixes to the streets name, for example for South Wilshire Blvd you should only enter Wilshire.

Once the information is inputted into Zimas, you will see a map of the property along with a panel on the left side of the window. On the left panel, click the “Additional” tab to expand additional information. Under this tab, refer to “Methane Hazard Site”, in this location you will see either “No”, “Methane Buffer Zone”, or “Methane Zone” listed.

If “No” is listed, your project is not within the Methane Zone, and LADBS will not require Methane Mitigation. If Methane Zone or Methane Buffer Zone is listed, LADBS will require a Methane Test to establish your Methane Mitigation requirements.

Property in the Methane Zone LADBS Methane Zone

Methane Zone Map

The city of Los Angeles has also established a methane zone map which shows shaded regions of where the methane zone and methane buffer zones are located.

On this map you will see lightly shaded purple colors that define the Methane Zone, while the dark purple perimeter defines the Methane Buffer Zone. Although the Methane Zone map is a great visual source, it is recommended to use Zimas as the main source for establishing your methane hazard site criteria.

What if my Property is located only partially in a Methane Zone?

Considering the Methane Hazard Type is established based on location, it is inevitable that a property will be partially located within a Methane Zone and partially not categorized as a methane hazard. In these cases, we highly recommend reaching out to your LADBS plan checker to establish the methane testing and potential Methane Mitigation requirements and Mitigation Construction. There are too many variables in development that make it difficult to set a standard for what the requirements would be for these scenarios, but based on previous Case Studies:

  • LADBS may require the developer to assume that the entire project is within a methane hazard zone, hence the methane mitigation requirements will be based on the methane test results for the methane zone criteria.
  • LADBS plan checker may evaluate the location of the proposed structure in conjunction with the portion of the property which is classified as a methane zone. The plan checker may only enforce the methane zone requirements for the portion of property that is located within the Methane Zone.

Methane Mitigation Consultant

In all cases, it is highly recommended to evaluate your project specific details with a Methane Mitigation Consultants and the LADBS plan checker to establish the final Methane Testing, Mitigation Design, and Methane Mitigation Construction requirements.

Property Mitigation Construction Zone LADBS Methane Zone

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