Skip to main content
CityRuleLookup

Honolulu County, HI Solar Energy: Expedited Solar Permitting (2026)

Light Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Standard review deadline
14 calendar days
Large project deadline
28 days (over $50,000)
Post-correction deadline
7 days (14 for large projects)
Inspection scheduling
Within 2 working days
System size covered
Up to 20 kW rooftop PV

Summary

Honolulu must approve or deny rooftop solar permit applications within 14 calendar days, or 28 days for projects over $50,000.

These county ordinances apply to unincorporated areas of Honolulu County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

Establish an internet-based permitting process by which all permits required for the operation of a clean energy project are approved or denied within 14 calendar days after the submission of a complete application; provided that approval or denial of permit applications must be made within seven calendar days after submittal of required corrections; subject to the following exceptions and requirements.

(A)   Exceptions to the maximum time limits to approve or deny a permit application are as follows:

(i)   For clean energy projects that cost in excess $50,000, the project must be approved or denied within 28 calendar days after the submission of a complete application; provided that approval or denial of the permit application must be made within 14 calendar days after submittal of required corrections;

(ii)   Maximum time limits for approval or denial of a permit application do not apply if the plans are withdrawn by the applicant prior to completion of plan review, in which case the timeline will restart when the plans are resubmitted;

(iii)   Where the applicant fails to obtain required discretionary permits or approvals; or

(iv)   Where the applicant fails to submit a complete application, including failure to remit payment of all required fees.

(B)   If a map is required as a means to determine where the clean energy project will be installed, aerial or satellite photographs will be deemed sufficient if the photographs reasonably show where the installation is

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-10: Supplement 10, 12-2025 Ordinance No. 25-40 through Ordinance No. 25-56).

Full Breakdown

Under ROH § 18-5.10, the building official must run an internet-based permitting process for clean energy projects, including roof-mounted solar photovoltaic systems generating 20 kW or less. Complete applications must be approved or denied within 14 calendar days (7 days after corrections are submitted), except projects costing more than $50,000, which get 28 days (14 days after corrections). Inspections must be scheduled within two working days of a request.

Violations & Fines

Missing the review deadline does not create an automatic approval; applicants who believe the timeline was missed should escalate through the Department of Planning and Permitting.

Frequently Asked Questions

How fast must Honolulu review a rooftop solar permit?
Within 14 calendar days of a complete application under ROH § 18-5.10, or 28 days if the project costs more than $50,000.
Does the deadline apply to battery storage too?
Yes, the expedited process covers solar photovoltaic systems combined with energy storage systems meeting the section's size and certification requirements.

Sources & Official References

Other rules in Honolulu County

All Honolulu County rules

Compare Honolulu County to another location·View the Hawaii solar energy overview

Get notified when Expedited Solar Permitting in Honolulu County, HI changes

We'll email you the moment we detect a change in the code. No spam, unsubscribe anytime.

We'll never sell or share your email. One-click unsubscribe in every email.

See something wrong?

Help us keep this page accurate. If you notice an error or outdated information, let us know.

Expedited Solar Permitting in Cities Across Honolulu County