An occupancy permit was filed for a property located at 3400 Walnut St, Denver. This permit is typically required to ensure a building is safe for occupation and meets all applicable codes.

The applicant for this permit is not specified, and no additional details about the property or its use were provided. The building type and property classification are also not specified in the record.

Next steps would involve reviewing the permit details and ensuring the property meets all safety and regulatory requirements before it can be occupied. Further information may be available through the city's permit records system.