Oak Island / Caswell Beach — The Real Buyer's Guide

What Oak Island Actually Is

Oak Island sits on a roughly 15-mile-long barrier island in southeastern Brunswick County, North Carolina, connected to the mainland by the NC Highway 133 bridge (locally the G.V. Barbee Bridge) rather than a ferry. That single fact -- a real, drivable bridge, not a boat schedule -- puts it in a structurally different category from several of the ferry-only and gate-controlled markets covered elsewhere on this site. It also means the town functions with a genuinely full-time population rather than existing purely as a seasonal rental strip: the 2020 Census counted 8,396 year-round residents, and 2024 Census Bureau data puts the estimate near 9,322, making Oak Island -- per the town's own history and independent reporting -- the most populated incorporated municipality in Brunswick County. That status dates to July 1, 1999, when the previously separate towns of Long Beach and Yaupon Beach formally merged into the Town of Oak Island under North Carolina Session Law 1999-66. The consolidation talks in the late 1990s were driven partly by infrastructure: Yaupon Beach had a sewer system and Long Beach did not, and merging let the combined town solve that problem together. Caswell Beach, the community occupying the island's easternmost stretch, was invited into the same conversation but chose to remain independently incorporated -- it still is today, with its own government and a 2020 Census population of 395.

The island's age profile skews meaningfully older than a typical vacation-rental beach town, which matters for anyone evaluating it as a retirement or full-time-living market rather than a weekend rental. Aggregated Census/American Community Survey estimates compiled by demographic-data sites (Neilsberg, Point2Homes) put Oak Island's median age around 61-62, with close to four in ten residents 65 or older -- figures that are estimates derived from survey data rather than a hard decennial count, but that are directionally consistent across multiple independent aggregators. That skews the town's character toward a real, settled community with active civic life -- town council meetings, a functioning parks and recreation department, an all-volunteer sea turtle monitoring program with more than 200 members -- rather than a place that empties out after Labor Day.

Oak Island's defining physical-risk reality is erosion and storm exposure, and this page does not soften that. The town has not been able to fully renourish its beach in more than two decades, according to reporting from AOL/Cox Media on the town's search for offshore sand sources, and because Oak Island is not part of a federal beach-nourishment project the way some other North Carolina towns are, it has had to fund nourishment largely through its own taxpayers, with occasional one-time state grants. A roughly $40 million winter nourishment project was planned with about $20 million covered by a one-time state grant and the balance funded by the town, per Coastal Review's reporting. Separately, town leaders have asked their engineering firm, Moffat & Nichol, to study whether a terminal groin -- a hardened structure meant to slow sand loss, similar to the one Bald Head Island built in 2015 -- would make sense here; the firm's own assessment was that any groin project would require years of study and carry real, ongoing maintenance costs, and no groin has been built at Oak Island as of this research. On the storm side, Hurricane Isaias made landfall near Ocean Isle Beach on August 3, 2020 as a Category 1 storm with sustained winds near 85 mph, and caused an estimated $9.5-10 million in damage to Oak Island specifically, affecting roughly 1,100 homes, per WRAL's reporting -- storm surge overran roads and totaled vehicles, house fires broke out, and a tornado associated with the same storm system tracked more than eight miles from Bald Head Island toward Southport with winds near 115 mph. Governor Roy Cooper toured Oak Island's damage afterward, per ABC11's coverage.

Oak Island also carries a real, well-documented piece of national news history that this page states honestly rather than glossing over: on June 14, 2015, two teenagers were injured in separate shark bites on Oak Island beaches, roughly two miles and about ninety minutes apart, each losing an arm. The incidents came three days after a separate, less severe shark-bite injury at nearby Ocean Isle Beach, and the cluster drew coverage from CNN, ABC News, and the BBC, among other national and international outlets. No fatalities occurred, and this page does not state a shark species or a cause, because that was not independently confirmed for this build -- what is confirmed is that the cluster happened, was serious, and was real national news, not local legend. On a lighter note, Oak Island's other defining landmark is entirely benign: the Oak Island Lighthouse, standing in the separately incorporated Town of Caswell Beach at the island's eastern end, was the last lighthouse built in North Carolina, first lit on November 1, 1958. Its concrete tower carries three natural color bands -- gray, white, and black -- created by mixing different aggregates into the concrete as it was poured rather than by paint, meaning the tower never needs repainting. Ownership of the lighthouse and its surrounding oceanfront property passed from the federal government to the Town of Caswell Beach in 2004, and it remains open to the public, climbed via 131 ship's-ladder-style steps rather than a spiral staircase, since it has none.

Money matters here are genuinely two-layered, and worth stating plainly. Brunswick County's ad valorem tax rate for fiscal year 2025-26 is 34.2 cents per $100 of assessed value, a rate the county held steady from its 2022-23 level after a 2023 countywide revaluation reset assessed values, per NC Department of Revenue's official rate schedule. The Town of Oak Island layers its own municipal rate on top -- 16 cents per $100 for FY2025-26, unchanged from the prior year, per the State Port Pilot's coverage of the town budget -- putting the combined ad valorem rate at roughly 50.2 cents per $100 of assessed value before any special district add-ons. A significant billing change is also underway: starting with 2026 taxes, Brunswick County will take over tax billing and collection for the Town of Oak Island, so property owners who are used to two separate bills should expect a combined one going forward, per the town's own published notice. On the market-value side, Zillow's own home-value index put Oak Island's average home value at roughly $555,572 as of this research, down about 1.4% year over year, while other aggregators reported figures ranging as high as $650,000-$850,000 depending on methodology and time period -- a spread wide enough that this page states the range honestly rather than picking one number to feature. Anyone evaluating a purchase should pull current, address-specific figures from the Brunswick County Tax Office, a local agent, and a licensed insurance carrier rather than relying on any historical figure printed here.