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🌍 Environmental Rules/Coastal Development

East Honolulu vs Mililani Town

How do coastal development rules compare between East Honolulu, HI and Mililani Town, HI?

Mililani Town has fewer restrictions than East Honolulu.

East Honolulu, HI

Honolulu County

Heavy Restrictions

Coastal development along East Honolulu's Maunalua Bay shoreline requires Special Management Area permits under ROH Chapter 25, implementing HRS Chapter 205A coastal zone management.

View full East Honolulu rules β†’

Mililani Town, HI

Honolulu County

Few Restrictions

Mililani Town sits inland and is generally outside Honolulu's Special Management Area under ROH Chapter 25, so most projects do not need SMA permits.

View full Mililani Town rules β†’

Key Facts Comparison

FactEast HonoluluMililani Town
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Highlighted rows indicate differences between cities.

East Honolulu FAQ

Do I need an SMA permit to build a seawall in Hawaii Kai?

Yes. Shoreline structures like seawalls trigger SMA review under Chapter 25 and may also require a shoreline setback variance under HRS 205A Part III.

Does SMA apply to interior remodels near the coast?

Interior renovations with no exterior expansion or land disturbance typically fall outside SMA review, but any shoreline-facing work within the SMA should be confirmed with city planning.

Mililani Town FAQ

Do I ever need an SMA permit in Mililani?

Almost never for standard Mililani Town properties; the SMA boundary does not reach the community.

What if I build on a beach property elsewhere?

Coastal parcels outside Mililani are very likely inside the SMA and would need city and often state approvals.

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