By Benjamin Finnerty (S), REALTOR® (RS-83812) with Keller Williams Realty Maui · Kīhei, Maui · 808-481-9748

Quick Answer: Maui’s shoreline setback rules, in effect since August 25, 2024, measure the setback from an Erosion Hazard Line based on projected erosion with 3.2 feet of sea level rise. Where no line is mapped, the setback is generally 200 feet. Most oceanfront projects also need Special Management Area (SMA) review by the County of Maui.

I’m Benjamin Finnerty, a REALTOR® in Kīhei with Keller Williams Realty Maui. A lot of my work is in South Maui, where many homes and condos sit close to the ocean, and the Maui shoreline setback is one of the first things I look at with oceanfront buyers. These rules can decide whether you can rebuild, add on, repair a seawall or even replace a lanai, and they are now part of the County Council’s hotel-rezoning criteria too.

What is the Maui shoreline setback?

The shoreline setback is a line inland from the shoreline where new structures and most ground-altering work are restricted. State law (HRS §205A-43) requires setbacks of at least 40 feet inland from the shoreline, and counties can be stricter. Maui County is.

Under the Maui Island Shoreline Rules adopted by the Maui Planning Commission on November 14, 2023, and effective August 25, 2024:

• Where an Erosion Hazard Line (EHL) is mapped, the setback is based on that line. The EHL was modeled by the University of Hawaiʻi Climate Resilience Collaborative using projected coastal erosion with 3.2 feet of sea level rise, with County adjustments for shorelines that are stable or growing.
• Where no EHL is mapped, the setback is 200 feet, or an optional setback based on lot depth.
• The starting point is the shoreline itself. A certified shoreline survey from the State Department of Land and Natural Resources sets the official baseline when one is required.

The County’s online Setback Viewer shows approximate lines for planning only. The Department of Planning verifies the official setback for a specific property.

What can you build or repair inside the setback area?

Not much without approval. Before construction or ground-altering work in the setback area, owners generally file a Shoreline Setback Approval and/or Determination (SSAD) application. The rules list a set of categorical “no need” exceptions for minor activities, several of which require a declaration form and best management practices. Anything not expressly allowed may need a Shoreline Setback Variance, which is a much higher bar.

A 2024 review of the rules by a Honolulu law firm notes that repairs to lawfully nonconforming structures are capped at certain percentages of replacement cost over ten years, and that some routine interior and exterior work under $500,000 in a 24-month period is exempt. These details matter a lot for older oceanfront homes, so confirm the current thresholds with the Department of Planning before you budget a remodel.

What is a Special Management Area (SMA) permit on Maui?

The SMA is the coastal zone where the County reviews development for its effect on coastal resources under Hawaiʻi’s Coastal Zone Management law (HRS Chapter 205A). It extends farther inland than the setback. The County of Maui’s SMA page lays out four outcomes:

SMA outcome	When it applies (per County of Maui)	Who decides
Exemption	Not a “development” and no substantial adverse effect	Planning Department
Minor permit	Development under $750,000 ($500,000 on shoreline parcels) with no substantial adverse effect	Planning Department, no public hearing
Major (SMA use) permit	Above those values, or with possible coastal or environmental impacts	Maui Planning Commission, after a public hearing
Emergency permit	Imminent danger and substantial harm	Planning Director

You can see how this plays out on the Maui Planning Commission’s October 13, 2026 agenda, which includes a public hearing on an SMA use permit to rebuild a two-story home on Kai Pali Place in Lahaina that was destroyed in the August 8, 2023 wildfire.

Why do shoreline rules matter for Maui condo buyers right now?

Because shoreline exposure is now part of the hotel-rezoning test. On September 30, the Maui County Council voted 5-4 to refer two bills to the Maui Planning Commission that would rezone 32 shoreline condo complexes in Māʻalaea, Kīhei and West Maui from apartment to H-3 or H-4 hotel districts. To qualify, more than half of a building’s footprint must lie in the 3.2-foot Sea Level Rise Exposure Area, a special flood hazard area or the shoreline setback area.

Hotel zoning would let those buildings keep vacation rentals after Bill 9’s phase-out. But the same shoreline location that qualifies a building can also mean future erosion, repair limits and higher insurance and maintenance costs. I explained the criteria in my post on the sea-level-rise hotel rezoning rule.

My Take: What I’m Telling Oceanfront Buyers and Sellers

For buyers, I treat the shoreline setback like a zoning check that belongs in the due-diligence period, not after closing. Pull the County’s Setback Viewer, ask whether a certified shoreline exists, and look up any past SMA or shoreline permits and violations for the parcel. If you plan to remodel, expand or rebuild, talk to an architect or land-use consultant who works with Maui’s shoreline rules before you remove contingencies.

For condo buyers, ask the association about seawalls, erosion, recent shoreline permits and the reserve study. Repairs to shoreline structures can be capped or need a variance, and those costs often show up as special assessments. Pair that with the insurance and flood questions I covered in my flood insurance guide.

For sellers of oceanfront property, gathering permit history, any certified shoreline survey and association records before you list can shorten a buyer’s due diligence and reduce surprises in escrow. This is general information, not legal advice; confirm specifics with the County of Maui Department of Planning and a Hawaiʻi attorney.

Frequently Asked Questions

When did Maui’s new shoreline rules take effect?

The updated Maui Island Shoreline Rules took effect on August 25, 2024, after the Maui Planning Commission adopted them on November 14, 2023.

How far back is the shoreline setback on Maui?

It depends on the parcel. Where an Erosion Hazard Line is mapped, the setback follows that line. Where none is mapped, it is generally 200 feet, with an optional lot-depth method. State law sets a 40-foot minimum statewide.

Do I need an SMA permit to remodel my Maui home?

Possibly. If the property is in the Special Management Area, the Planning Department decides whether the work is exempt or needs a minor or major permit. Value thresholds are lower for shoreline parcels.

Where can I check a property’s shoreline setback?

The County of Maui’s Setback Viewer shows approximate lines for planning. For an official determination, contact the Department of Planning at (808) 270-7735.

Ask Benjamin

Oceanfront property on Maui comes with rules most mainland buyers haven’t seen before. I’m Benjamin Finnerty, and if you’re considering a home or condo near the shoreline, I’m happy to help you line up the right zoning and permit questions before you write an offer. Call or text 808-481-9748 or email benjamin@the808team.com.

Sources: County of Maui Department of Planning (Shoreline Rules and SMA Permits pages; Erosion Hazard Line data); Maui Planning Commission agenda for Oct. 13, 2026; Hawaiʻi Revised Statutes §205A-43; Cades Schutte (July 2024); Maui Now (Sept. 3 and Sept. 30, 2026).