Custom home builder in Caswell Beach, North Carolina, where Oak Island meets the Cape Fear.

Here's what Caswell Beach decides for your lot.

We build new homes and remodel existing ones in Caswell Beach, from our home base in Southport.

• Where the map sets a flood height, the house must sit two feet above it.
• On the oceanfront, a house under 5,000 square feet sits at least 60 feet back from the vegetation line.
• The house, drive, walks and pool deck can cover 30 or 36 percent of the lot, by district.

At a glance

County

Brunswick County

Jurisdiction

Town of Caswell Beach's own building, flood, and zoning code

Design wind speed

150 mph across the whole town (2018 NC Residential Code)

Flood maps

FEMA flood maps, read on the state's flood site (fris.nc.gov)

From Southport

About 8 miles via NC 133 and the G.V. Barbee Bridge, then Caswell Beach Road, about 15 minutes

Residential Contractor License #109520 · Member, Brunswick County Home Builders Association

What Caswell Beach's code asks of a house.

Jurisdiction

Town of Caswell Beach, Brunswick County, North Carolina

Adopted code

Town of Caswell Beach Code of Ordinances: Building, Ch. 150; Flood Damage Prevention, Ch. 151; Zoning, Ch. 153 (American Legal Publishing)

Permit authority

Town of Caswell Beach: Sec. 150.015 authorizes the town's own Inspection Department; oceanfront and estuarine work also needs a CAMA permit through NC DEQ's Division of Coastal Management

Flood-map source

Brunswick County Flood Insurance Study and FEMA Flood Insurance Rate Maps, read through the NC Flood Risk Information System (fris.nc.gov)

Ultimate design wind speed

150 mph; the entire town lies east of US 17 (2018 NC Residential Code, Table R301.2(4), footnote c)

Caswell Beach regulates land use through its own Code of Ordinances. That code is separate from the Brunswick County Unified Development Ordinance, which covers unincorporated ground nearby. A Brunswick County rule stops at the town line.

A setback, a permitted use, or a freeboard figure for a county parcel a mile away says nothing about a lot in Caswell Beach. The base flood elevation is how high the flood map expects water to rise in a flood with a 1% chance each year. Freeboard is the extra height a flood code adds above it.

Section 150.015 lets the town create its own Inspection Department, headed by a superintendent or director of inspections. Under state authority in G.S. 160D-1102, the town may also appoint building, electrical, plumbing, housing, zoning, mechanical, and fire prevention inspectors. That is enabling language: it describes what the town may do. Whether town employees staff the desk, or the town contracts the work to another provider, is a separate question for Town Hall. Ask it before you build a permit timeline around either answer. Oceanfront and estuarine work needs a second permit on top of the town's. That is a CAMA permit, under the state's Coastal Area Management Act. NC DEQ's Division of Coastal Management administers it at the state level, and a local permit officer issues minor permits.

Chapter 150 adopts the current edition of the State Residential Building Code by reference, for one- and two-family homes. It takes that code as amended by the North Carolina Building Code Council. The structural, envelope, and mechanical requirements come from the state code. The town's own chapters govern land use, flood elevation, site work, and inspection. Keep that split in mind when reading about building here. The wind speed and the load path are a state code question. The setback, the coverage cap, and the height ceiling are a town question. The ocean and marsh setbacks are a state coastal-management question. Three separate authorities reach the same set of drawings.

Sec. 153.015 sets out the town's zoning districts. Four are single-family districts: R-20SF, R-20, R-12, and R-8, distinguished mainly by minimum lot size. The others cover multi-family housing, resort condominiums, and mobile homes. They also cover conservation of the estuarine ecosystem, the golf course and related uses, and public park and beach access. A single-family house on an ordinary Caswell Beach lot almost always falls into one of those four districts. The district itself sets the lot size, setback, and height numbers that follow.

Sec. 153.084's schedule and Sec. 151.46's Zone VE standard are the two sections a set of drawings leans on most. Town Hall confirms the current figures in both before the drawings rely on them.

New construction in Caswell Beach replaces more than it adds.

New construction in Caswell Beach often means replacing an older house. Along the town's one road, turnover happens parcel by parcel, as older houses reach a certain point. A current design assumes a floor elevation, a load path, and a level of airtightness. Past that point, those are easier to build from the pile caps up than to retrofit into an existing frame. On a marsh-facing or interior lot, the controls are setbacks and coverage, measured against the R-20SF, R-20, R-12, or R-8 schedule. No CAMA oceanfront line enters that calculation.

Renovating here starts at the build-to-line.

Renovating an existing Caswell Beach house runs through the same flood chapter that governs new work, applied to whatever the structure already is. The threshold question is whether the scope counts as a substantial improvement. Crossing that line pulls the whole project into the elevation and certification requirements a new house carries. On lots next to the ocean or the marsh, the zoning schedule adds what it calls a build-to-line. That line is drawn between the farthest ocean-ward or marsh-ward points of the two adjacent structures. Decking, stairs, and most at-grade improvements over six inches high are held street-ward of it, subject to a short list of exemptions in the code. Two questions get settled with the town before a scope of work is priced. One is the substantial-improvement threshold. The other is where the build-to-line actually falls on that particular lot.

An ADU in Caswell Beach is the zoning administrator's call.

What an accessory dwelling unit can be on a Caswell Beach lot is the zoning administrator's call. The town's table of permitted uses lists single-family dwellings. It lists a two-family duplex use, confined to the resort residential district. It lists condominium and multi-family uses by district. It lists no accessory dwelling or accessory apartment as a use of its own. That absence leaves the question open for the zoning administrator to settle, parcel by parcel. Ask about it before buying a lot on the strength of an assumption carried over from another town.

Whatever the answer, built-upon area is the limit that binds first. The zoning schedule caps it at 30 percent of actual lot size in the R-20SF and R-20 districts, and 36 percent in R-12 and R-8. It separately caps single-family structure bulk size at 5,400 square feet, across all four districts. The schedule's own note says the built-upon-area cap is the first consideration. That makes the bulk-size number a ceiling only. A lot can be too small to reach 5,400 square feet. That happens once the driveway, the parking area, the walks, and the pool deck are all counted. On a coverage-limited lot, every square foot of hardscape competes with the house. That trade is worth resolving during schematic design, while it is still a drawing.

A table of uses that stays silent on a question leaves it open. It goes to the zoning administrator before it goes into a floor plan.

Accessory structures follow the house. They are generally held to the same minimum setbacks as the principal structure. On a lot next to the ocean or the marsh, they also sit street-ward of the build-to-line. On an inland lot, a pool house or detached garage might push toward the view. Here it gets pulled back toward the road. The schedule sets the ceiling. The site analysis tests a proposed footprint against it while the drawings can still change cheaply.

One road carries all of Caswell Beach, ocean to marsh.

Caswell Beach Road runs from the Oak Island town line, past the golf course and lighthouse, to old Fort Caswell at the island's tip. The house lots along it face the ocean, the marsh, the golf course, or the wooded interior.

The town covers about four square miles. Roughly three of them are land; the rest is water and marsh. That is a small footprint even by barrier-island standards. The town's own account of its history dates incorporation to 1975. It traces the name to Richard Caswell, North Carolina's first and fifth governor. The nineteenth-century fort at the river end of the road carries the same name. Caswell Beach incorporated separately from the Town of Oak Island, the larger town immediately west. Its building, flood, and zoning ordinances stand apart from Oak Island's code. They also stand apart from the Brunswick County ordinance that governs unincorporated ground on the mainland.

Everything in town runs off one road, Caswell Beach Road. It is the only way into and out of town, and the only road along it. There is no second corridor, and no business district inside the limits. A contractor's truck, a resident's car, and a delivery van all use the same stretch of asphalt. That single point of access is a real scheduling condition on a build here. Material deliveries, crane picks, and concrete trucks share one road with everyone who lives on it.

• Oceanfront lots along the Atlantic side, facing open water past the dune.
• Marsh-front lots on the north side, toward the Intracoastal Waterway and the marsh creeks behind it.
• Interior lots set around the golf course, away from both shorelines.
• Wooded lots further back in the town's residential districts, off the immediate waterline on either side.

Two landmarks sit toward the east end of that road. The Oak Island Lighthouse was activated in 1958 and deeded to the Town of Caswell Beach in 2004. It offers interior tours in the summer months. The lighthouse stands inside Caswell Beach's town limits, even though it carries the neighboring town's name. At the tip, where the river meets the ocean, sit the grounds of Fort Caswell. Fort Caswell is a nineteenth-century coastal fortification, now owned and run by the North Carolina Baptist Assembly. The Fort Caswell Historic District joined the National Register of Historic Places on December 31, 2013.

That geography produced a narrow band of houses along one road, with the golf course holding much of the interior. Anyone planning a new home in Caswell Beach chooses among those few lot types. That choice decides most of what follows. It decides which flood zone applies. It decides whether an oceanfront setback or an estuarine shoreline rule governs the water side of the lot. It also decides how much of the buildable ground is dune and maritime vegetation, and how much is open ground.

An inlet mouth makes this shoreline harder to read.

Every house in Brunswick County designs to an ultimate design wind speed. Table R301.2(4) of the 2018 North Carolina Residential Code sets it. The table's own footnote draws the county's dividing line at US 17: 140 mph to the west, 150 mph to the east. Caswell Beach sits entirely on the east side of that line, at the far tip of the island. So the whole town designs to 150 mph. That includes the golf-course lots and the wooded interior, along with the oceanfront strip. What differs parcel to parcel is exposure. Exposure is the direction-by-direction terrain classification the residential code applies to a specific building. This ground has open ocean on one side and a wide river mouth on the other. That classification is settled parcel by parcel, during structural design.

Sitting at a river mouth adds a variable most Brunswick County beach towns do not carry. The Cape Fear's ebb tide moves sediment past the point where the river meets the ocean. At that kind of inlet, a shoal can build, shift, or draw back over years, more than a long straight oceanfront does. That is one reason an east-end Caswell Beach lot and a lot farther down Oak Island can carry different shoreline histories under closely related rules. Whether the beach fronting a specific parcel has been nourished is a question for NC DEQ's Division of Coastal Management. So is what the most recent shoreline-change figures show for that stretch. The Division is the agency that administers Ocean Erodible Area designations along this coast. The Coastal Resources Commission first drew those designations in 1979.

The north side of town faces a different kind of water. The Intracoastal Waterway and the tidal marsh creeks behind it run along Caswell Beach's marsh side. Lots there deal with estuarine flooding and tidal drainage on a slower clock. The water there rises and stands; on the ocean side it arrives as a breaking wave. Salt still reaches both sides of the island. The island is narrow enough at this end that a marsh-facing house and an oceanfront house sit inside the same band of airborne chloride. Both need materials specified for it. The case for a coastal standard was written for ground shaped exactly like this, where two shorelines sit close enough to reach the same framing.

The town's flood chapter adopts the Brunswick County Flood Insurance Study and the associated FIRM panels by reference. Later revisions get folded in as FEMA issues them. The authoritative answer for any parcel comes from a lookup against those maps, or against the NC Flood Risk Information System. That lookup is one of the first things a site analysis settles for a specific lot.

The flood zone follows from which shoreline you're on.

A written site analysis comes before every Caswell Beach design. It is delivered to the client before a floor plan exists. On this stretch of island, it is organized around one question: which shoreline does this lot actually answer to? From that question follow several others:

• The flood-zone determination that follows from it.
• The wind exposure classification on each face of the building.
• The measurement line the setback runs from.
• The sun path across a lot that is often only a few hundred feet deep.
• The view corridors worth spending glass on.

That analysis is filed in the client workspace the day it is finished, dated ahead of the first drawing. Everything the design does afterward on this specific lot can be checked back against it. It carries the same standing a survey carries: a document every later drawing answers to.

On an oceanfront parcel, the analysis works out where the state's oceanfront construction setback lands. NC DEQ's Division of Coastal Management measures it landward from the first line of stable natural vegetation, or from an applicable pre-project measurement line. It sizes the setback from two factors together: the size of the structure, and a setback factor tied to the local rate of shoreline change. The default factor is 2, unless the shoreline is eroding faster than 2 feet a year. Where the river's shoal has been feeding or drawing down the sand, that rate can sit well off the county average, in either direction. That is a bigger swing than along a straight run of oceanfront farther down the island. For a structure under 5,000 square feet, the setback works out to 60 feet or 30 times the setback factor, whichever is greater. The line and the rate both belong to the ground as it is surveyed today. So the number that governs a specific Caswell Beach parcel comes from an actual DEQ or town CAMA measurement, taken on that lot.

A marsh-front lot on the north side measures from the estuarine shoreline instead. 15A NCAC 07H .0209 is the Coastal Resources Commission's Coastal Shorelines rule. It sets the Estuarine Shoreline Area of Environmental Concern at 75 feet landward of the normal high-water level. That widens to 575 feet where the adjoining water carries an Outstanding Resource Waters classification. New development in that AEC holds to a 30-foot setback from the same line. A few narrow exceptions apply. They cover water-dependent uses, pile-supported signs and fences, a boardwalk six feet wide or less, and a slatted observation deck up to 200 square feet. A separate Public Trust Shoreline AEC, under the same rule, runs its own 30 feet along shorelines that touch public trust waters. Which of the two reaches a specific lot on the Intracoastal Waterway or its marsh creeks is one question. Whether any exception applies is another. Both get confirmed against the current rule text, and an on-the-ground measurement with DEQ's Division of Coastal Management. On a Caswell Beach lot, the sequence is the same either way. Establish the measurement line first. Then find out how much buildable ground is left. Only then start drawing.

Where a lot is mapped in the coastal high hazard area, called Zone VE, the town's flood chapter sets out what has to happen structurally. New construction and substantial improvements must sit landward of the reach of mean high tide. A substantial improvement is work costing enough, against the building's market value, that the code treats it like new construction. Both must be elevated so the bottom of the lowest horizontal structural member sits no lower than the regulatory flood protection elevation. Floodproofing cannot substitute for that elevation. A registered engineer or architect certifies the design on the state's V-Zone Certification form. Before the town issues a certificate of compliance, a registered engineer or architect also certifies the finished construction. Fill placed under or around the elevated structure is limited to two feet. More is allowed only where a qualified design professional shows it will not divert floodwater or wave action onto a neighboring elevated building. The code separately bars altering protective dunes or established vegetation in ways that would increase flood damage nearby.

• Regulatory flood protection elevation: Base flood elevation plus 2 feet of freeboard where a BFE has been set; at least 2 feet above the highest adjacent grade where it has not (Sec. 151.10).
• Zone VE reference level: Bottom of the lowest horizontal structural member, no lower than the regulatory flood protection elevation; floodproofing may not substitute (Sec. 151.46(B)).
• Oceanfront construction setback: for a structure under 5,000 square feet, 60 feet or 30 times the DEQ setback factor, whichever is greater. It is measured landward from the first line of stable natural vegetation or the pre-project vegetation line, whichever applies (NC DEQ, Division of Coastal Management).
• Height limit, single-family districts: the higher of 35 feet above mean elevation or 26 feet above the regulatory flood elevation (Sec. 153.084, Note 1). That is the zoning schedule's own phrase, different from the flood chapter's defined term above; confirm it with the zoning administrator.

The flood chapter's general standards apply on top of all that. They quietly shape decisions people expect to make late. New construction and substantial improvements must be anchored against flotation, collapse, and lateral movement. They must use flood-damage-resistant materials, in the sense FEMA Technical Bulletin 2 uses the term. Electrical, mechanical, plumbing, and other service equipment must sit at or above the regulatory flood protection elevation, or be otherwise protected from floodwater. On an elevated house, the condensing unit, the water heater, the panel, and the ductwork need a place. That gets settled while the structure is being drawn. On a lot with limited elevated deck area, those pieces compete with the house for the same square footage.

Once the setback or the build-to-line is fixed, whichever one actually reaches the lot, three different orientations follow. Which one applies depends on which of Caswell Beach's few lot types a buyer is standing on. An oceanfront lot is organized around the ocean view and the onshore breeze past the dune. A marsh-front lot on the north side gives its water-facing elevation to tide and storm exposure. Glass matters less there than the exposure does. An interior lot backing the golf course, which sits in the Commercial Recreation district, answers to neither shoreline rule. It orients toward the fairway. A lot can be pinched between a CAMA measurement line on one side and a street setback on the other. That can leave exactly one workable building position, found by walking the ground. Embedment depth comes from soil borings taken on the specific parcel. A lot near the river mouth and a golf-course lot a few hundred yards inland each get their own borings.

Open water on both sides of town

Caswell Beach lies between two open bodies of water: the Atlantic past the dune, and the wide mouth of the Cape Fear across the marsh. FORTIFIED Gold is built to answer that condition. It is the highest tier of the standard the Insurance Institute for Business & Home Safety publishes. Every Tropical Tides project pursues it, and an independent evaluator checks the work. FORTIFIED Gold asks for a continuous load path from roof to foundation, and a sealed roof deck. It also asks for edge metal detailed to stay attached under uplift, soffits fixed in place, and protected openings. On a Caswell Beach oceanfront lot, the roof edge, the soffit line, and every window face open Atlantic, across a narrow beach and one dune. Each of those assemblies carries the pressure that direct exposure applies. A marsh-facing or interior lot designs to the same 150 mph wind speed and pursues the same designation. The exposure calculation differs there, and the pressure arrives from a different quarter.

Airtightness carries its own argument on ground this exposed. The design target on every project is sub-1.0 ACH50, well below what most jurisdictions require. A blower-door test measures the result once construction reaches that stage. Salt-laden air moving off open water finds every loose window flashing and unsealed penetration. A tight envelope keeps that air out of the wall cavity in the first place. That is what makes intentional, filtered ventilation the way fresh air actually enters the house. The coastal case for indoor air quality applies directly to a house standing this close to salt water on two sides. So does tight construction without a stuffy result.

On a lot with open Atlantic on one side, the air barrier decides whether salt air reaches the framing at all.

Hardware and assemblies for a salt environment follow from that same exposure. Every connector, strap, fastener, hinge, and piece of exterior equipment on a lot at this end of the island gets specified against chloride. That happens at the start of design, so it can be drawn and priced before a substitution gets ordered on site. A FORTIFIED load path stays continuous only as long as the metal in it survives. On a barrier-island tip, that makes it a materials question before it is a structural one.

Mechanical sizing has a particular stake at this end of the island. A share of the housing stock here functions as a second home. Equipment matched to the home's actual cooling and dehumidification load keeps running long enough to wring the moisture out of the indoor air. Equipment picked off a square-footage rule of thumb behaves differently: it short-cycles, satisfies the thermostat, and leaves the humidity behind. For an owner who locks a Caswell Beach house up in early September and does not open it again until spring, that difference matters. One path means walking into conditioned air at a held humidity. The other means walking into the smell that means the drywall and cabinetry have been sitting damp for months. Moisture planning long before year eight treats that as a problem solved on paper during design. Design is the only point where it is cheap to fix.

FORTIFIED Gold is pursued on every project, and an independent evaluator from the Insurance Institute for Business & Home Safety checks the work. That check is what makes the designation worth anything. Sub-1.0 ACH50 is a design target, written into the drawings and carried into construction. The blower-door number gets measured before handover.

The quieter rules are the ones that surprise people.

The numbers people quote about building in a beach town are the big ones: the setback, the height, the flood elevation. The provisions that most often surprise a client on a Caswell Beach lot are smaller than that. They sit in the building chapter, where the town regulates what happens to the ground, and to the night.

Exterior lighting on new construction must be masked, so night lighting does not carry beyond the property boundaries. Existing houses come into compliance over a period the Town Commissioners set. Read plainly, that is a light-trespass rule. The ordinance text, as published, governs where light lands. It does not itself invoke sea-turtle protection. Many North Carolina oceanfront towns do carry sea-turtle lighting rules, though, so an oceanfront glazing and lighting scheme here should assume neither answer. On an ocean-facing house, the sound approach either way is lighting that is shielded, downward, and controllable at the beach elevation. Ask the town directly what applies during nesting season, before a fixture schedule is issued.

The ground is regulated before it is disturbed. Clearing, site preparation, driveway, patio, and sport-court installation all call for a landscape plan, approved by the town's building inspector. So does a change to the landscape after construction. Impervious surfaces must carry positive drainage control, so runoff does not leave the site. That last rule has design consequences on a narrow lot. Water that cannot be pushed onto a neighbor needs somewhere to go on the parcel itself. Grades, swales, and any infiltration area get laid out with the house because of it.

On land the town zones Conservation, the protection is stricter still. Removing trees, vines, undergrowth, or other vegetation there needs written approval first. The town grants that approval to preserve the existing maritime vegetation and ecosystem, or to allow a permitted use without harming it. The town may also require a removal plan, certified by a licensed professional. Maritime vegetation holds the dune and the back-island soils in place, and the code treats it that way. The town's own conservation-zone rule names the marsh-bordering lands and the maritime forest along Caswell Beach Road as the areas it currently protects (Sec. 98.01).

Chapter 154 sits over all of it, as the town's stormwater regulation. It carries a post-construction management and plan-approval article, and a separate article on illicit discharges and watercourse protection. That sits alongside the built-upon-area caps already set in the zoning schedule. These are short provisions, in a code amended from time to time. None of them is a headline number. Town Hall confirms the operative wording before it drives a decision on a specific lot.

The setback and the height limit are published. The rules that decide where the water goes and where the light lands are the ones that arrive late and cost the most.

Two counters review a Caswell Beach permit.

The town's own Inspection Department reviews the building, flood, and zoning submittal, under Chapters 150 through 153. Any oceanfront or marsh-adjacent scope adds a CAMA minor permit, reviewed at the local level before construction starts. Which counter opens first for a given scope, and what each one wants to see, is a Town Hall conversation, held during the site analysis.

Tropical Tides is a custom home builder based in Southport. The drive from our Southport office is about fifteen minutes, over the Barbee Bridge. Getting to a Caswell Beach lot during design or construction is an easy trip. Our custom homes in Caswell Beach are partner-executed under our direction and North Carolina Residential Contractor License #109520. The practice belongs to the Brunswick County Home Builders Association, and every decision on the job is kept in a private client workspace. How the partner model works is worth reading before signing anything. Near open water like this, it is fair to ask upfront who will be there for a flashing sequence or a pile connection.

A Caswell Beach inquiry starts with the lot itself. Which of the town's four settings (oceanfront, marsh, golf course, or wooded interior) does the parcel sit in? Is it already under contract, or still being weighed against a lot at the other end of the same road? Start a project, or call 910-946-5512 directly. What follows is a written site analysis. It is keyed to which of the four lot settings this one is, and which permit counter opens first for it.

A handful of neighborhoods line Caswell Beach Road.

A handful of neighborhood-scale developments line Caswell Beach Road. The town's own conservation-zone ordinance names two of them directly, Caswell Dunes and Ocean Greens Condominiums. Both border the Maritime Forest the town protects (Sec. 98.01). Where a homeowners association or an architectural review committee governs a particular address, that community's own declaration documents are the record to confirm it against. The order of authority holds either way. The town's zoning code sets the dimensional floor everywhere inside the limits. A community's own design guidelines can add to that floor, but cannot lower it.

The golf course at the town's west end sits inside the zoning schedule's Commercial Recreation district, one of the districts the zoning code names. Lots beside it read differently from either shoreline. No CAMA oceanfront setback applies. No build-to-line runs across them. The controls reduce to the ordinary single-family district numbers, with the fairway as the view a floor plan gets organized around.

• Oak Island, immediately west across the town line, where the same 150 mph wind zone meets a much longer stretch of barrier-island grid.
• Southport, the mainland river town a few miles up NC 133. A lot there answers to a city Unified Development Ordinance, a different code from a beach town's.
• St. James, a gated, planned community off NC 211, with its own architectural review layered on top of the town's code.

Walking a specific Caswell Beach lot finally answers these questions. These comparisons are only context for it. A lighthouse and a fort sit near the east end of a single road. A golf course sits at the west end. Two entirely different shorelines lie within a short walk of nearly every address in town. Together, they show how narrow a slice of coast this is, and how much that narrowness decides. The site analysis turns that geography into numbers a design can use.