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Determining Property Use at the Incident Location

This NFIRSGram explains the importance of accurately classifying your incident location using the Mixed Use Property and Property Use fields.

Each individual property has a specific use, whether it is a structure or open land. Property Use (Section J on the Basic Module) refers to the actual use of the property where the incident occurred. The intent of this data element is to specify the property use, not the configuration of the building or other details of the property.

Accurate classification on the frequency, losses and types of fires for each property use is important because it helps communities to:

  • Plan to protect their communities and citizens.
  • Analyze various fire problems that occur across a wide range of property types.
  • Target fire prevention programs and fire protection or suppression systems.
  • Order priorities for inspection, develop new building codes and evaluate the success of programs directed at particular types of properties.

Important points

  • If the property is a structure that is under construction, select the use for which it will be used. This is not applicable to construction site incidents (Property Use code 981). If the structure is vacant or being demolished, select its last significant use.
  • For property that is mobile, in transit or stationary, the Property Use code is determined based on the property it is located on at the time of the incident.
  • Use Property Use code 419 for mobile homes used primarily as fixed residences; Incident Type code 121 (Section C on the Basic Module) should be used to indicate that this was a fire in a mobile home used as a fixed residence.

Mixed Use Property Field versus Property Use Field

When a property has two or more uses, complete the Mixed Use Property Field (Section I) to capture the overall use of the property. The Mixed Use Property code helps to better identify the overall or main use of the property and may be different than the Property Use code selected.

When determining the property use in a mixed property scenario, you should always select the specific property use where the incident is occurring.


A fire occurs in a hair salon that is also in the basement of a single-family home.
Are there two uses for this property? Yes. Mixed Use code 40 — Residential use.
Where did the incident occur? In the hair salon. Property Use code 557 — Personal service, includes barber and beauty salon.
An EMS call that occurs in a restaurant in an office building.
Are there two uses for this property? Yes. Mixed Use code 59 — Office use.
Where did the incident occur? In a restaurant. Property Use code 161 — Restaurant or cafeteria.
An incident that occurs in a clothing store at an enclosed mall.
Are there two uses for this property? Yes. Mixed Use code 53 — Enclosed mall.
Where did the incident occur? In a retail clothing store. Property Use code 529 — Textile, wearing apparel sales.
Food pantry.
Property Use code 150 — Public or government, other.
Escape room.
Property Use code 110 — Fixed-use recreation places, other.
Parking lot of a grocery store.
Property Use code 965 — Vehicle parking area.
Townhouse (if more than two units).
Property Use code 429 — Multifamily dwelling.

For more information

Appendix B of the NFIRS 5.0 Complete Reference Guide PDF 5.2 MB contains a list of common property use codes sorted alphabetically.

Have questions about how to code the Mixed Use Property and Property Use fields?

Please contact the NFIRS Support Center: Monday – Friday between 8 a.m. – 4:30 p.m. ET, at 888-382-3827 or by email at