Honolulu Commercial Building Permit Guide: Plan Check Process for Non-Residential Projects

Occupancy classification: get it right on the cover sheet

The IBC occupancy classification determines almost everything else about a commercial project: allowable area, fire resistance requirements, egress design, and sprinkler requirements. DPP reviewers verify the occupancy classification against the proposed use, and an incorrect classification on the cover sheet generates corrections that ripple through every other system.

Common Hawaii commercial occupancies and their IBC classifications:

• Restaurant / food service (A-2): Assembly occupancy. Requires sprinkler system under IBC §903.2.1 when over 300 occupants, earlier with mixed occupancy analysis.
• Retail (M): Mercantile occupancy. Lower fire protection threshold than assembly, but sprinkler requirements apply above IBC Table 903.2 thresholds.
• Office (B): Business occupancy. Most forgiving classification for area and construction type.
• Hotel / short-term rental (R-1): Residential occupancy with more stringent fire protection than B occupancy, including corridor ratings and sprinkler requirements starting at 4 or more units.
• Warehouse / storage (S-1): Storage occupancy. Rack storage and high-piled storage have additional HFD review requirements.

Honolulu Fire Department review

For commercial projects triggering fire code compliance review, DPP routes the plans to the Honolulu Fire Department (HFD) as part of the plan check process. HFD review covers:

• Sprinkler system design (NFPA 13 or 13R as applicable)
• Fire alarm system design (NFPA 72)
• Emergency egress lighting and exit signs
• Access and firefighting features (fire lanes, FDC locations, Knox box)
• Hazardous materials storage (if applicable)

HFD reviews on a separate queue from DPP architectural review. Both must clear before the permit is issued. Submitting incomplete fire protection documents delays HFD clearance independently of whether architectural review is complete.

Accessibility compliance

Commercial projects in Hawaii must comply with the Americans with Disabilities Act (ADA) Standards for Accessible Design (2010 Standards) and the Hawaii Accessibility Requirements (HAR), which in some provisions exceed the federal minimum. Key areas where Hawaii-specific requirements apply:

• Parking stall dimensions and van accessible requirements
• Restroom fixture counts and accessible fixture locations
• Accessible route from public sidewalk to building entrance
• Counter and service window heights in food service and retail

DPP requires an ADA/accessibility compliance statement on the cover sheet and accessible route diagrams showing the path from the public right-of-way to the building entry and throughout the accessible portions of the facility.

Tenant improvement permits

Tenant improvements (TIs) within an existing commercial shell are among the most common commercial permits filed at Honolulu DPP. Key considerations:

• Change of occupancy:If the TI changes the occupancy classification of the space — for example, converting an office to a restaurant — a full change-of-occupancy review is required, including evaluation of the existing building's compliance with the requirements for the new occupancy.
• Existing non-compliant elements: TI permits that trigger a change of occupancy may require bringing restrooms, egress, or accessibility up to current code throughout the space — not just in the area of work.
• DOH review for food service: Any project involving food preparation requires a separate review and approval from the Hawaii State Department of Health, Environmental Health Division. DOH approval is required before the DPP permit can be finaled.

Most common commercial plan check corrections

• Occupancy classification inconsistency — cover sheet lists one occupancy, but exit capacity calculations use a different occupant load
• Area analysis missing or inconsistent with IBC Table 506 allowable area calculations
• Accessible route not shown from parking to building entry
• Sprinkler design documents not included with architectural submission
• Energy code documentation (ASHRAE 90.1 compliance forms) absent
• Construction type not supported by the area and occupancy combination