Key Takeaways
There’s no honest one-size-fits-all price per square foot for an LBI custom home.
NAHB puts average national construction cost around $162 per square foot, excluding land. Building on a barrier island adds costs that number misses.
Pilings and flood rules usually make the biggest structural difference in cost.
Interior finishes are roughly a quarter of construction cost, so your selections matter.
Budget for demolition, permits, flood insurance, and a contingency.
Start design early if you want an off-season build.
The Honest Answer Nobody Wants to Hear
It depends. And yes, we know that’s the answer everyone hates.
But on Long Beach Island, “it depends” isn’t a dodge. The same floor plan can cost very different amounts on an oceanfront lot in a high-hazard flood zone and on a bayside lot with an easier foundation. So if someone quotes you a firm per-square-foot number over the phone before seeing your lot, they’re either psychic or guessing.
At Nardini Custom, our family has been in the housing industry since 1934, and today we design and build from our showroom in Ship Bottom. Here’s where the money really goes on an LBI custom home.
Why LBI Costs More Than the National Average
For a baseline, the National Association of Home Builders’ 2024 Cost of Construction Survey found average construction costs of about $162 per square foot for a 2,647-square-foot home, not counting the lot.
Treat that as a floor. It reflects typical homes on ordinary lots with standard finishes, and an LBI custom home is a different animal.
Start with flood risk. Long Beach Township’s annual flood letter notes that FEMA classifies the township and most of Long Beach Island as a special flood hazard area. That single fact shapes the foundation and the height of your first floor. Then add salt air, coastal wind, and a barrier island where every truck and crew crosses the same causeway.
Where the Money Goes on an LBI Custom Home
Every project is different, but most LBI budgets fall into the same handful of buckets.
The Lot (and the House Already on It)
In most cases, an LBI custom home starts with an existing house that has to come down. That means demolition, utility disconnects, debris hauling, and sometimes bulkhead work on bayfront lots. Still shopping for property? Have your builder walk it with you before you buy.
Lot prices vary so much by block and town that we’ll leave that number to your realtor.
Foundations, Elevation, and Flood Rules
This is usually the biggest structural difference between building on LBI and building inland. Homes in coastal flood zones are generally built on pilings or other open foundations, with the first living floor raised above the base flood elevation (BFE) shown on FEMA’s flood maps. Every extra foot adds cost in pilings, framing, and stairs. And whatever goes below that floor needs to handle water (see our guide to flood-resistant flooring for LBI homes).
Then there’s freeboard, the extra height above BFE that state or local rules may require. FEMA notes that freeboard isn’t required by the National Flood Insurance Program, but communities are encouraged to adopt it, and building higher can lower flood insurance rates.
New Jersey’s rules are also changing. In January, the state Department of Environmental Protection adopted its REAL flood rules, which call for new buildings in flood-prone coastal areas to sit at least four feet above FEMA’s base flood elevation. A legacy period lets eligible, complete permit applications be reviewed under the older standards through July 20, 2027, so confirm what applies to your lot early in design.
Design, Engineering, and Permits
Soft costs add up quietly. You’ll typically need a survey, an architect, a structural engineer for the piling and wind design, an elevation certificate, and permits from one of LBI’s six municipal construction offices.
During pre-construction, our team works with you, your architect, and any interior designer to produce design proposals, construction documents, a master schedule, detailed and final estimates, material sourcing, and permits. It’s not glamorous. But it’s where budgets are won or lost, and it’s a core part of our custom home building services on LBI.
An Exterior Built for Salt and Wind
Roofing, siding, windows, decking, and fasteners all have to stand up to salt spray, sun, and storm winds. We handle roofing for coastal homes and siding on LBI as part of the same build, so one team owns the whole envelope.
Interior Finishes: The Line Item You Control Most
Here’s a number worth knowing. In NAHB’s survey, interior finishes made up 24.1% of construction costs, the largest single share. Cabinets, countertops, flooring, tile, lighting, and hardware are where budgets drift, one “small” upgrade at a time.
It’s also where we can help the most. We’re one of the few builders on the island with our own retail design center, right on Long Beach Boulevard, so you can pick cabinetry, countertops, luxury flooring on LBI, and finishes in person with design support. Our build clients get wholesale pricing on those selections, and we manufacture our own cabinetry in Lancaster, PA. You can browse the cabinetry, countertop, and flooring brands we carry before you stop in.
Want to see where those choices end up? Our portfolio of LBI homes and kitchens includes a Nardini-built home featured on the 2024 LBI Home Tour.
Outdoor Living
Decks, outdoor kitchens, outdoor showers, and even rooftop pools (we’ve built one for a beachfront home) belong in the budget from day one, because they affect structure, drainage, and permits.
Costs That Catch LBI Owners Off Guard
Flood insurance. As the township’s flood letter points out, standard homeowners policies don’t cover flood losses.
Builder’s risk insurance during construction.
Temporary housing, or lost summer rental income if the build runs long.
A contingency. Older lots can hide surprises once the old house comes down.
One more thing. New Jersey generally requires new home builders to register with the state’s New Home Warranty program, which provides limited coverage for major structural defects for up to 10 years. Ask any builder you’re considering for their registration number.
Timing Can Change Your Price
Almost everyone on LBI wants to build in the off season so the house is ready to enjoy (or rent) by summer. That means fall and winter schedules fill up fast.
Wrapping up design and permits early puts you in a better spot to lock in a start date and order long-lead items like windows and cabinetry.
Build New or Renovate?
Not every LBI project needs to be a teardown. Under the substantial improvement rule described in the township’s flood letter, if repairs or improvements cost 50% or more of the structure’s replacement cost (as determined by the tax assessor), the entire home has to meet current flood regulations, which can mean elevating it. At that point, many owners decide building new makes more sense.
Weighing both paths? Our pages on home renovations and additions on LBI and renovating an LBI home after storm damage are good places to start, and if your house took on water recently, our flood and storm damage repair team on LBI can help you sort out what’s worth saving.
How We Price a Custom Home at Nardini Custom
We don’t give out a per-square-foot price from a phone call, and honestly, you shouldn’t trust anyone who does.
Instead, we start with your goals, budget, and schedule, then build the estimate from your actual lot, plans, and selections. You’ll know what’s included and what isn’t before construction starts. After you move in, you get a custom homeowner manual and a warranty walkthrough 11 months after construction.
Interviewing builders? Our list of questions to ask before hiring a builder covers change orders, payment schedules, and fixed-price versus cost-plus contracts.
Get a Real Number for Your LBI Home
Thinking about building on Long Beach Island? Stop by our Ship Bottom showroom at 619 Long Beach Boulevard or contact Nardini Custom to request an estimate. We’ll talk through your wish list and give you a budget based on your actual property, not a national average.
Frequently Asked Questions
How much does it cost per square foot to build a house on LBI?
There’s no single reliable figure, because lot, flood zone, elevation, and finishes vary so much. NAHB’s national average is about $162 per square foot excluding land, and custom coastal homes on LBI generally run well above that.
Do new homes on LBI have to be built on pilings?
In coastal high-hazard (V) zones, federal floodplain rules generally require homes to be elevated on open foundations such as pilings or columns. Many other LBI lots use pilings too. Your flood zone, engineer, and local building office determine what’s required.
What is the base flood elevation?
It’s the height floodwater is expected to reach in a flood with a 1% chance of happening in any given year, as shown on FEMA flood maps. Your lowest floor generally has to sit at or above it, plus any required freeboard.
How long does it take to build a custom home on Long Beach Island?
It depends on design, permitting, and home size, so we set a master schedule during pre-construction that shows you what to expect.
Is it cheaper to renovate or rebuild on LBI?
It depends on the scope. If improvements reach 50% or more of the structure’s value as determined locally, the whole house may need to meet current flood rules, and at that point rebuilding often becomes the better investment.
Do New Jersey’s REAL flood rules affect my LBI build?
They may. NJDEP’s REAL rules raise elevation standards for new coastal construction, though eligible complete applications can be reviewed under prior standards through July 20, 2027. Ask your architect and builder how they apply to your lot.
Can I see finishes in person before I commit to a builder?
Yes. Visit our Ship Bottom design center to see cabinetry, flooring, countertops, and hardware, and our build clients receive wholesale pricing on their selections.
