When is a Knox Box (key box) required?
- The building is protected with an automatic sprinkler system equipped with a local or transmitted water-flow alarm
- The building is provided with any fire alarm system equipped with an outside audible/visual signaling device
- The building is provided with any fire alarm system where the alarm is transmitted to an off-site location, or to the fire alarm center for the servicing fire department. (New construction or a change of tenancy/occupancy classification) Knox Box Information (PDF)

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1. When is a Design Professional required for my project?
2. When is a State Construction Design Release (CDR) required?
3. What is a Class I structure?
4. Where do I go to apply for a Building Permit?
5. How long does a typical plan review take?
6. If I am remodeling an apartment building with 3 or more units, is the building classified as Residential?
7. What is Fire-Resistance-Rated Construction?
8. Is a fire wall the same as a fire barrier?
9. What is the difference between fire stopping and fire blocking?
10. What is meant by "a change of use or occupancy" and when does it apply?
11. When is a Knox Box (key box) required?
12. Where can I purchase a Knox Box?
13. When is a Design Professional required for my project?
14. When is a State Construction Design Release (CDR) required?