A building permit in Honolulu is issued by the City and County's Department of Planning and Permitting, the sole building authority for all of Oahu, which administers the county's adopted code and runs plan review and inspections. Electrical and plumbing work is covered by a DPP permit too, done by state-licensed contractors and inspected separately.
Honolulu's defining reality is volume. The Department of Planning and Permitting reviews more permits than any other office in the state, and it has responded to long queues with a self-certification path for licensed design professionals on eligible projects. Two rules catch Oahu applicants out: the structural wind calculations Hawaii's wind-design provisions require, and the approved permit needed before any work on a designated exceptional tree. A clean, complete submittal — and, where eligible, self-certification — is the way through.
This guide covers the City and County of Honolulu, which spans all of Oahu. There is no separate city or town building department on the island; the Department of Planning and Permitting is the authority for the whole county.
Self-certification is the fast lane on Oahu. Because the Department of Planning and Permitting carries the state's heaviest permit load, its self-certification path for licensed design professionals is often the fastest route on an eligible Oahu project — confirming eligibility early can save months in the review queue.
What requires a building permit in Honolulu?
Hawaii regulates construction through four county building departments over a single statewide baseline. The State Building Code Council sets the Hawaii State Building Code — the International Building and Residential Codes with Hawaii amendments, including the state's own wind-design provisions — and each of the four counties adopts and amends its own edition from that baseline, so every part of the state is covered by an enforced code. There are no sub-county building departments: the county is the building authority for the whole island. In Honolulu, a permit means a Department of Planning and Permitting review that is the busiest in the state, a self-certification lane for licensed professionals, and the wind and tree rules that shape an Oahu submittal.
Short on time to read all of this?
Get a free quote →Two things run statewide beneath the county permit. Contractor licensing is a state matter: the Department of Commerce and Consumer Affairs, through its Contractors License Board, issues every contractor licence in Hawaii, and no county issues its own — but a state licence only lets a contractor contract for the work, not begin it, so the county permit is a separate and equally mandatory step. And Hawaii law requires solar water heating in a new single-family home unless an exemption is approved, a request that must be filed with the permit application rather than discovered at inspection.
Typically permit required
- A City and County of Honolulu building permit from the Department of Planning and Permitting for construction, additions and most alterations
- An approved permit from the Department of Parks and Recreation before any work on a designated exceptional tree
- A county building permit from the county that covers the island — the only building authority, since there is no sub-county department
- A State of Hawaii contractor licence from the Department of Commerce and Consumer Affairs Contractors License Board, valid statewide but not a substitute for the county permit
- Electrical and plumbing work, covered by a DPP permit unless exempt and inspected separately from the building work
- Solar water heating in a new single-family dwelling, or an approved exemption filed with the permit application
Often exempt
- Minor work the county's adopted code places below the permit threshold, where zoning still applies
- A separate county contractor licence — Hawaii licenses contractors only at the state level, so the state licence carries across all four counties
- Minor work the county's adopted code places below the permit threshold, where zoning still applies
How the four counties divide the state
Hawaii has only four county building authorities, each covering entire islands. The City and County of Honolulu covers all of Oahu through its Department of Planning and Permitting; Hawaii County covers the Big Island, Maui County covers Maui, Molokai and Lanai, and Kauai County covers Kauai and Niihau, each through its Department of Public Works. Each county adopts its own edition of the state code with local amendments that reflect its geography and hazards, sets its own fees and timelines, and runs its own plan review and inspections. In Honolulu, The City and County of Honolulu is a consolidated city-county, so its Department of Planning and Permitting is the one building authority for the whole island of Oahu, and it carries the largest permit workload in Hawaii. The department has become known for long plan-review waits, and its principal answer is a self-certification program that lets licensed design professionals certify certain permits and bypass the standard review queue. Two Oahu specifics shape a submittal: Hawaii's wind-design provisions require structural wind calculations, and Honolulu protects designated exceptional trees — work on one needs an approved permit from the Department of Parks and Recreation before the tree work is done.
Not sure this scope needs a permit?
Get a free quote →Who handles permitting in Honolulu?
Oahu is served by the City and County of Honolulu Department of Planning and Permitting, which issues building permits (covering electrical and plumbing work), administers the county's adopted code, and runs plan review and inspections for the entire island. Its main office is at 650 South King Street, Honolulu, with a satellite office at 1000 Uluohia Street, Kapolei; both are open Monday to Friday 7:45am to 4:30pm, and applications are filed online through HNL Build.
| Detail | Information |
|---|---|
| Authority | City and County of Honolulu Department of Planning and Permitting |
| Office | 650 South King Street, Honolulu, HI 96813 (and 1000 Uluohia Street, Kapolei); Monday to Friday 7:45am to 4:30pm; dpp@honolulu.gov |
| Phone | (808) 768-8000 |
| Code | The county's adopted edition of the Hawaii State Building Code, on a 2018 IBC base |
| Fast lane | Self-certification for licensed design professionals on eligible permits |
Permit types
Residential permits
Houses, additions, alterations and decks on Oahu are permitted through the Department of Planning and Permitting under the county's adopted code, with structural wind calculations and, on a coastal or flood parcel, elevation and flood-opening requirements. The contractor holds the state licence, electrical and plumbing work is covered by a DPP permit unless exempt (ROH 18-3.1), done by state-licensed contractors and inspected separately from the building work, and a new single-family home carries the solar water-heater requirement.
How Hawaii contractor and trade credentials work
Contractor licensing in Hawaii is centralised at the state level. The Department of Commerce and Consumer Affairs Contractors License Board issues and regulates every licence under the state contractor law — general engineering, general building and specialty classes — and a licence is valid across all four counties; no county issues its own. But the state licence and the county permit are independent: the licence authorises a contractor to contract for the work, and the county permit authorises the work to begin, and both are mandatory. Electricians and plumbers are state-licensed. In Honolulu, electrical and plumbing work is covered by the DPP permit unless exempt, and the permit is confirmed before construction starts.
Rather talk it over?
Call 1-855-478-4290 →Commercial permits
Commercial and multi-family projects are reviewed under the county's adopted code, with wind design, structural engineering and, where eligible, the self-certification path. Historic-district and shoreline parcels draw additional review, and the electrical and plumbing work is inspected separately.
Trade work and utility interconnection
In Honolulu, electrical and plumbing work needs a DPP permit unless the work is exempt under ROH 18-3.1 (for example, small repairs by a licensed contractor up to $2,500 in 12 months). The work must be done by state-licensed contractors (HRS Chapters 444 and 448E) and is inspected by DPP’s electrical and plumbing inspectors, separately from the building inspections. A solar or renewable-energy installation also runs through utility interconnection with Hawaiian Electric alongside the permit.
Honolulu permit costs and fees
Honolulu scales its building permit fee to construction valuation under a tiered rate table; DPP publishes a fee calculator. The cost dimension particular to Oahu is the wind and structural engineering the code requires, and the review time the queue can add.
| Item | Fee or rule |
|---|---|
| Building permit | Tiered by construction valuation under the department's rate table |
| Trade work | Electrical and plumbing work, covered by a DPP permit unless exempt; confirm the fee with DPP |
| Self-certification | An eligible-project path for licensed design professionals to shorten the review |
| Contractor licence | A State of Hawaii licence from the Contractors License Board, required in every county |
Rather not deal with the building department?
Get a free quote →Time is the real Honolulu cost. Because the Department of Planning and Permitting carries the heaviest load in the state, review time is the cost that most often surprises an Oahu project — which is why a complete submittal and, where eligible, self-certification matter as much as the fee.
Trade permits and who may pull them
Trade work in Hawaii is licensed by the state. In Honolulu, electrical and plumbing work is covered by a DPP permit unless exempt and is inspected on its own, separately from the building work.
Permit required
- General contracting — under a State of Hawaii general contractor licence, with a county building permit before work begins
- Electrical — by a state-licensed electrical contractor, on a DPP permit unless exempt
- Plumbing — by a state-licensed plumbing contractor, on a DPP permit unless exempt
Typically exempt
- A separate county contractor licence — the state licence carries across all four counties
- Minor work the county's adopted code places below the permit threshold
How to apply for a Honolulu building permit
One of four: Honolulu for Oahu, Hawaii County for the Big Island, Maui County for Maui, Molokai and Lanai, or Kauai County for Kauai.
Each county adopts its own edition of the state code with local amendments; the edition and amendments govern plan review.
From the Contractors License Board; valid statewide, but not a substitute for the county permit.
Structural and wind-design calculations, foundation design, site plan, drainage, and any coastal, flood or shoreline triggers.
The building permit through DPP, covering any electrical and plumbing work, and the solar water-heater requirement or its exemption.
The building and the separate trade inspections against the permit number, then the certificate of occupancy.
Want this handled start to finish?
Get a free quote →Review, corrections and what actually causes delay
The Honolulu delays that recur are queue and completeness delays: an incomplete package that cycles through repeated review rounds, or an exceptional-tree question found late. A complete submittal, self-certification where eligible, and checking early for any exceptional tree keep the review moving.
Inspections in Honolulu
County inspections follow the adopted edition — foundation, framing, the separate trade inspections, and final — requested from the county building department against the permit number, with Hawaii's wind-design provisions and, in coastal and flood zones, elevation and flood-opening requirements carrying real weight. The electrical and plumbing inspections are called separately from the building inspections. A certificate of occupancy closes the file. On Oahu the building inspections run through the Department of Planning and Permitting against the permit number, and the electrical and plumbing inspections are called separately from the building inspections.
Honolulu permit search and official resources
- City and County of Honolulu Planning & Permitting — building permits, the self-certification program, the adopted code and inspections
- City and County of Honolulu — the department's online permit tools and inspection scheduling
- Hawaii Contractors License Board (DCCA) — the statewide general, engineering and specialty contractor licence required in every county
- Hawaii State Building Code Council — the statewide baseline building code the counties adopt and amend
Frequently asked questions
Who issues building permits on Oahu?
The City and County of Honolulu Department of Planning and Permitting, the single building authority for the whole island. There is no separate city or town building department on Oahu.
Inspections are where schedules slip.
Get a free quote →What is self-certification?
A DPP program that lets qualified Hawaii-licensed architects and engineers self-certify code compliance on eligible projects (affordable rental housing, interior commercial tenant improvements, residential projects on Hawaiian Home Lands, and energy-efficient projects) instead of standard plan review. Given the department’s volume, it is often the fastest route on an eligible project.
What is the exceptional-tree rule?
Honolulu protects designated exceptional trees. Work on one needs an approved permit from the Department of Parks and Recreation before the tree work is done, so check early whether the parcel has one.
Which building code does Honolulu use?
The county's adopted edition of the Hawaii State Building Code, on a 2018 International Building Code base with Honolulu amendments. Confirm the current edition and amendments with the department.
Do I need a state contractor's licence?
Yes. A State of Hawaii licence from the Contractors License Board is required in every county. It lets a contractor contract for the work, but the county building permit is a separate and equally mandatory step.
Are electrical and plumbing covered by the building permit?
Yes, in Honolulu electrical and plumbing work is covered by a DPP permit unless exempt under ROH 18-3.1. It must be done by state-licensed contractors and is inspected by DPP’s electrical and plumbing inspectors, separately from the building inspections.
Simplify Honolulu permitting with Alliance Permitting
21+ years of working real jurisdictions is what tells you that Honolulu's Department of Planning and Permitting is the busiest office in the state, and that self-certification and a clean package are what beat the queue. Our team confirms self-certification eligibility, carries the wind calculations, checks for exceptional trees early, holds the state contractor licence, includes the electrical and plumbing scope, and tracks the submittal to a certificate — corrections included.
Ready to break ground in Honolulu sooner?
Send us the scope and the parcel. We confirm the review path with the City and County of Honolulu Department of Planning and Permitting, assemble the submittal, file it, and track it through issuance — corrections included.
More Hawaii permitting guides
More Hawaii permitting guides
This guide is provided by Alliance Permitting for general information about Honolulu permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.