Portlock, HI — Roughly 120 Homes, About a Third of Them Directly on the Water
Portlock is a small, exclusive oceanfront neighborhood at the eastern tip of Hawaii Kai, wedged between Maunalua Bay and the base of Koko Head -- genuinely tiny by any measure, with roughly 120 homes total and around 40 of those sitting directly oceanfront on large, level lots that commonly exceed 15,000 square feet. That scale is the single most important fact for a buyer to understand: this is not a subdivision with dozens of comparable listings at any given time, it's a handful of large estates changing hands infrequently, which means price data here is inherently thin and any single "median" should be read as a rough midpoint of a wide $3 million-to-$20 million-plus range rather than a precise market signal. Portlock sits administratively inside the broader Hawaii Kai/East Honolulu area and shares its property tax structure and general excise tax exposure with the rest of Oahu, but its combination of oceanfront access, large lots, and genuine privacy puts it in a different price tier than most of Hawaii Kai proper.
What Portlock Actually Is
Portlock sits at the far eastern end of Hawaii Kai, where the community's coastline curves around toward Koko Head and Hanauma Bay beyond it. It's small by any measure -- multiple Oahu real estate sources put the neighborhood at around 120 homes total, with roughly 40 of those sitting directly on the ocean, giving the community a genuinely low, single-digit or low-double-digit annual turnover in any given year. The defining physical feature is lot size: Portlock's lots are large and level by Honolulu standards, many exceeding 15,000 square feet, allowing house sizes that commonly run 3,000-5,000 square feet with the largest estates reaching 7,000-8,000 square feet or more -- a genuinely different product than the smaller, denser lots typical of most of urban Honolulu.
Views from Portlock's oceanfront row look out across Maunalua Bay toward Diamond Head in the distance, with direct beach access from many oceanfront lots and a reputation locally for privacy and quiet relative to more visited parts of East Honolulu. The neighborhood's proximity to Koko Head gives it a real topographic backdrop distinct from the flatter marina-canal areas of Hawaii Kai proper a short distance west, and its position at the community's eastern edge means it sits closer to Hanauma Bay and Koko Head Regional Park than to Hawaii Kai's marina and Koko Marina Center retail hub.
Because Portlock is administratively part of the broader Hawaii Kai/East Honolulu area, it shares the same City and County of Honolulu property tax structure, the same statewide general excise tax, and the same Honolulu short-term-rental ordinance (Bill 41/Bill 62, requiring a 90-day minimum stay outside resort zones) as the rest of non-resort-zoned Oahu -- what distinguishes Portlock from its surroundings is purely the combination of oceanfront access, large lots, and a small, low-turnover inventory, not a separate regulatory regime.
Setting & Nearby Recreation
Portlock's own character is quiet and residential -- there's no commercial district within the neighborhood itself, and residents drive a short distance west into Hawaii Kai proper for Koko Marina Center's grocery, restaurants, and theater. What Portlock does offer directly is oceanfront and near-oceanfront access to Maunalua Bay, genuinely private compared to Oahu's more visited south shore beaches, along with proximity to Koko Head District Park and the Koko Crater hiking trails immediately to the east.
Hanauma Bay Nature Preserve, one of Hawaii's best-known snorkeling destinations and a protected Marine Life Conservation District, sits just around the coastline from Portlock -- close enough to be a defining nearby landmark and a real source of visitor traffic on the connecting roads at peak times, even though the preserve is managed separately from Portlock's own residential streets.
Independent research. No ads. No sponsored listings. This is a pilot "thin market" build (hub + 2 topic pages) for a smaller, lower-priority destination within the Oahu, HI batch, not the site's full page-family format. Facts drawn from: multiple Oahu real estate brokerage neighborhood guides (Cathy Hawaii Homes, HiEstates, Tom Presler Realtor, AlohaTony, Patrick Gey, Dwell Hawaii, Hawaii Home Listings) for Portlock's ~120-home/~40-oceanfront neighborhood scale, its large-lot (15,000+ sq ft) and house-size characteristics, and its $3M-$20M+ price range; general Hawaii Kai/East Honolulu neighborhood guides for the community's proximity to Hanauma Bay and Koko Head. The City and County of Honolulu Real Property Assessment Division's own published FY2025-26 rate tables (realproperty.honolulu.gov) are the source for the Residential/Residential A structure described here, consistent with the rates independently confirmed elsewhere on this site's Oahu pages, and Hawaii's Department of Taxation is the source for the 4.712% combined Oahu general excise tax rate. Genuine, disclosed gaps: no single, non-conflicting current median sale price was found for Portlock -- with only ~120 homes total and infrequent turnover, this research treats any published median as directional rather than a precise, current market signal, and states that limitation honestly; no recent (2025-2026) closed-sale count or specific transaction data was independently verified this session; and no Portlock-specific flood-zone or insurance-premium data was compiled, since this varies by the individual oceanfront parcel. Confirm all current figures directly with the City and County of Honolulu Real Property Assessment Division, a Hawaii-licensed real estate attorney, and a local buyer's agent before making a purchase or investment decision. Nothing on this page is legal, tax, financial, or insurance advice.