What should I check before buying coastal property in New Brunswick?

Buying coastal property in New Brunswick involves some of the most complex due diligence in the province — get these checks done before you sign anything.

The Bay of Fundy has the highest tidal range in the world (up to 16 metres in the upper Bay), and the Northumberland Strait and Gulf of St. Lawrence coastlines each have their own distinct risks. Where your property sits determines almost everything about what you can build, insure, and sell in the future.

Start with flood and erosion mapping. The Province of New Brunswick maintains flood risk maps through the Department of Environment and Local Government. Coastal erosion is accelerating along many NB shorelines — particularly on the Northumberland Strait (Shediac, Cap-Pelé, Bouctouche areas) where sandy barrier beaches are actively migrating. The Bay of Fundy coast faces storm surge risk, especially during nor'easters combined with high tides. Ask the seller for any coastal erosion studies, and check whether the property has lost measurable land in recent decades. Google Earth's historical imagery tool is a surprisingly useful free starting point.

Understand the Tidal Watercourse and Wetland Alteration Permit requirements. Under the Clean Water Act and Watercourse and Wetland Alteration Regulation (NB Reg 90-150), any work within 30 metres of a watercourse or wetland — including the ocean — requires a permit from the Department of Environment and Local Government. This affects what you can build, where you can build it, and how close to the water. A property that looks buildable may have significant restrictions once you factor in the 30-metre buffer.

Check the building permit authority for that specific location. If the coastal property is in an incorporated municipality (like Shediac, Bathurst, or Saint John), the municipal planning department handles permits. If it's in a rural or unincorporated area — which describes most of NB's coastline — you'll be dealing with the appropriate Regional Service Commission. For example, rural properties near Shediac fall under RSC 7 (Plan360) at (506) 533-3637, while the Saint John rural coast falls under RSC 9 (Fundy) at (506) 738-2014. Call them before purchasing to confirm what's permitted on the specific lot.

Salt air is hard on everything. Coastal NB properties face constant exposure to salt-laden fog and wind, which accelerates corrosion of metal fasteners, roofing, HVAC equipment, and electrical components. If there's an existing structure, budget for a thorough inspection by a licensed home inspector with coastal experience — look specifically at roof fasteners, any exposed steel, heat pump or HVAC units, and the condition of exterior cladding. Galvanized and stainless steel fasteners are essential for any future construction or renovation.

Well and septic deserve extra scrutiny. Most rural coastal properties rely on private wells and on-site sewage systems. Saltwater intrusion into wells is a real risk on low-lying coastal lots, particularly after storm surge events. Have the well water tested for salinity, coliform bacteria, and arsenic (naturally occurring in some NB coastal geology). The septic system must comply with NB Reg 2009-137 — confirm the system has been inspected recently and that the lot meets the minimum 1-acre requirement. TIS handles septic permits at 1-844-249-6533.

Insurance is the sleeper issue. Many NB coastal properties are now facing difficulty obtaining affordable flood and overland water insurance, or are being excluded from coverage entirely. Talk to an insurance broker before making an offer — not after. Some properties that were insurable five years ago are no longer insurable at reasonable rates as insurers reprice coastal risk across Atlantic Canada.

Finally, if the property has any structures built before the 1990s, check for asbestos siding and pipe insulation — common in older NB coastal camps and cottages. A camp-to-cottage conversion or seasonal-to-four-season upgrade triggers full NBC compliance including insulation, egress, and fire separation requirements.

Browse our directory at New Brunswick Construction Network to find licensed home inspectors, structural engineers, and contractors familiar with coastal NB construction — getting expert eyes on the property before purchase is money very well spent.