Do NB home insurance premiums increase after adding a deck?

Adding a deck typically does increase your home insurance premium in New Brunswick, but the increase is usually modest and well worth understanding before you build.

When you add a deck, you're increasing the replacement value of your home — and insurance premiums are tied directly to that replacement value. A well-built 12x16 composite deck worth $10,000-$14,000 will add to your home's insured value, which in turn nudges your premium upward. Most NB homeowners report premium increases in the range of $50-$200 per year after adding a mid-sized deck, though this varies significantly by insurer, deck size, and material.

The most important thing to understand is that you are required to notify your insurance provider when you add a deck. Failing to do so can create serious problems at claim time. If your home suffers a fire or other covered loss and your insurer discovers an undisclosed deck, they may reduce your payout or dispute the claim entirely. A quick phone call to your broker before or right after construction is all it takes to stay protected.

Material and construction quality matter to insurers. A pressure-treated deck built to NB Building Code — with proper footings below the 1.2-1.5m frost line, a correctly flashed and lag-bolted ledger, and compliant railings — is viewed more favourably than a DIY structure of questionable quality. Some insurers will ask whether a permit was pulled and inspections completed. This is another reason why skipping the permit process (required for any attached deck or one over 600mm above grade) can create headaches beyond just the municipality — it can affect your coverage.

A few practical tips when talking to your insurer:

Tell them the approximate replacement value of the deck (your contractor can provide this), the material used (composite, pressure-treated, cedar), whether it's attached or freestanding, and whether a building permit was obtained. Some insurers also ask about elevated decks or hot tub platforms, which carry additional liability considerations.

It's also worth asking your broker whether your personal liability coverage is adequate. A deck increases the likelihood of guests using your outdoor space, and if someone is injured on your property, liability coverage is what protects you. Most standard NB home policies include $1-2 million in liability, but it's worth confirming.

The bottom line: notify your insurer, build to code, pull the permit, and the premium increase will be predictable and manageable. The bigger risk is not disclosing the deck and finding yourself underinsured when it matters most.

If you're still in the planning stage, New Brunswick Decks can match you with a local builder who builds to code and can provide proper documentation for your insurer — the matching service is completely free.