Property Tax on the Southport ICW Corridor
Because this page covers a stretch of water and shoreline rather than a single incorporated town, the property tax picture here genuinely varies by exact parcel location in a way a single-town hub page doesn't have to address. This page explains the three real jurisdictional layers a buyer needs to check.
The County Rate Applies Everywhere on This Corridor
Brunswick County's own FY2025 ad valorem property tax rate, effective July 1, 2025, is 34.20 cents per $100 of assessed value, per the county's own tax-rates page. That rate applies to every parcel on this corridor regardless of which municipality, if any, it also sits within -- it's the one constant in an otherwise variable picture. Brunswick County reassesses property values on its own cycle, and any specific parcel's current assessed value (not necessarily its market value) is what this rate actually applies against; confirm a specific parcel's current assessment directly with the Brunswick County Tax Office.
Inside Southport City Limits: An Added Municipal Layer
A meaningful share of this corridor's residential real estate -- including much of the Indigo Plantation neighborhood along Dutchman Creek and the ICW -- sits within Southport's own city limits, which means an additional municipal tax rate applies on top of the county rate. This site's Southport, NC hub covers that city rate in its own dedicated property-tax coverage; this page does not repeat that figure here, since it's identical regardless of which Southport-area page states it, but flags clearly that any corridor parcel confirmed to be within city limits should be evaluated against that combined city-plus-county total, not the county rate alone.
Caswell Beach: A Separate, Smaller Municipality at the River Mouth
At the literal mouth of the Cape Fear River, on the eastern tip of Oak Island, Caswell Beach is its own separately incorporated town, distinct from both Southport and the rest of Oak Island -- home to the Oak Island Lighthouse, completed in 1958 and deeded to the town in 2004 along with adjacent beachfront property. A parcel within Caswell Beach's own town limits carries that town's own municipal tax rate on top of the Brunswick County rate, separate from and not to be confused with Southport's city rate. This page did not independently confirm Caswell Beach's current municipal tax rate -- confirm directly with the Town of Caswell Beach before assuming any figure applies.
Unincorporated Brunswick County: County Rate Plus Fire District Only
A portion of this corridor's shoreline and adjacent land sits in unincorporated Brunswick County -- outside both Southport's and Caswell Beach's municipal boundaries. For those parcels, the tax bill is the county's 34.20-cent rate plus whatever fire-district or other special-district levy applies to that specific location, with no additional city or town rate layered on top. This can mean a meaningfully lower total tax bill than an equivalent property inside Southport or Caswell Beach city limits, an important distinction for a buyer comparing two otherwise similar waterfront parcels on this corridor.
Why This Matters More Here Than on a Single-Town Hub Page
Because this page's subject is a geographic corridor rather than one incorporated town, the single biggest property-tax mistake a buyer can make here is assuming a marketing description like 'Southport-area' or 'near Southport' tells them which tax jurisdiction actually applies. A property genuinely inside Southport's city limits, a property in the separate town of Caswell Beach, and a property in unincorporated county land can all be marketed with very similar language despite carrying meaningfully different combined tax rates -- the same structural confusion this site's Southport, NC hub flags for St. James Plantation, applied here to a different set of jurisdictions along this specific stretch of water.
What This Page Recommends Before Making an Offer
Before treating any tax figure as settled for a specific corridor property, confirm three things directly: which municipality, if any, the parcel actually sits within, using the Brunswick County GIS/tax parcel lookup rather than a listing description; that municipality's current tax rate, confirmed directly with that town's finance office rather than a secondhand figure; and the parcel's current assessed value from the Brunswick County Tax Office, since assessed value and market/listing price commonly diverge, sometimes significantly, following a reappraisal cycle. None of these three facts should be assumed from a real estate listing alone.
What This Page Does Not State
This page confirms the constant Brunswick County rate and explains honestly why the combined bill genuinely varies by jurisdiction on this specific corridor. It does not state Caswell Beach's current municipal tax rate, a reconciled average combined rate across the whole corridor, or a specific dollar tax bill for any hypothetical property -- none of which can be honestly generalized given how much jurisdiction varies here. Confirm all current figures directly with the Brunswick County Tax Office and the relevant town government before making a purchase decision. Nothing on this page is tax or legal advice.
Ready to talk to a local Southport ICW agent?
Get a Free Agent Referral →Independent research. No ads. No sponsored listings. Data sourced from: Brunswick County's own website (brunswickcountync.gov) for the FY2025 county ad valorem tax rate; the Town of Caswell Beach's public information and the U.S. Coast Guard's historical record (via Wikipedia's sourced entry) for the Oak Island Lighthouse's 1958 completion and 2004 deed transfer establishing Caswell Beach's separate municipal identity; and Homes.com's neighborhood data confirming Indigo Plantation's location within the broader Southport-area market. Facts not independently confirmed and not invented here include: Caswell Beach's current municipal tax rate; a reconciled corridor-wide average combined tax rate; and which specific parcels along this corridor fall inside versus outside Southport's city limits without a direct GIS lookup. Confirm all current figures directly with the Brunswick County Tax Office and the relevant town government before making a purchase decision. Nothing on this page is tax or legal advice.