Will home insurance cover a Vancouver addition mid-build?

Mid-construction home additions in Metro Vancouver typically require a separate builder's risk (course of construction) insurance policy — your standard homeowner's policy almost certainly won't cover the addition while it's being built.

This is one of the most overlooked insurance gaps in home addition projects, and it can leave you financially exposed at exactly the wrong moment.

Why Your Existing Policy Falls Short

Standard homeowner's insurance is designed to cover your completed home as it exists today. The moment you start demolishing walls, exposing framing to the elements, or adding new structure, you've created a situation your existing policy wasn't written to handle. Most policies explicitly exclude or severely limit coverage for structures under construction, unattended building materials on site, and damage caused by construction activity itself.

In Metro Vancouver's climate, this matters enormously. Exposed framing during the October-to-March rainy season is vulnerable to moisture damage, warping, and mould growth. A windstorm during construction can scatter lumber and damage adjacent structures. A fire in an open, partially-framed addition can spread to the existing house. If none of these events are covered, you're absorbing the full cost of rebuilding — on top of the project you've already paid for.

Builder's Risk Insurance — What It Covers

A builder's risk policy (also called course of construction insurance) is specifically designed for this gap. It typically covers the structure under construction, materials stored on site, and sometimes materials in transit. Coverage usually includes fire, wind, theft of materials, vandalism, and certain weather-related damage. It does not typically cover contractor errors, faulty workmanship, or normal construction defects — those fall under the contractor's liability and warranty obligations.

Who carries it matters. Your general contractor should carry their own commercial general liability (CGL) insurance, which covers third-party bodily injury and property damage they cause. But CGL is not the same as builder's risk. Clarify with your contractor before the project starts whether they carry builder's risk on your behalf, or whether you need to purchase it yourself as the homeowner. Some contractors include it; many do not.

Practical Steps Before Construction Starts

Call your existing home insurer before demolition begins. Ask them directly: does my current policy cover the addition during construction, and what happens to coverage on my existing home while work is underway? Get the answer in writing. Some insurers will extend limited coverage with an endorsement; others will require you to obtain a separate policy.

If you need to purchase builder's risk separately, premiums are typically calculated as a percentage of the total project value — roughly 1–4% of construction cost for the policy term. On a $200,000 addition, that's $2,000–$8,000 for the build period. Factor this into your project budget from the start.

Also confirm that your contractor carries WorkSafeBC coverage for all workers on site. This is a legal requirement in BC, and if an unregistered worker is injured on your property, you could face liability. Ask for a WorkSafeBC clearance letter before work begins — you can verify coverage directly through the WorkSafeBC online portal.

After the Addition Is Complete

Once the addition passes final inspection and occupancy is granted, contact your insurer immediately to update your policy. Your home's replacement value has increased, and your coverage limits need to reflect that. Failing to update your policy after a major addition can leave you underinsured in the event of a total loss — a serious problem given Metro Vancouver's construction costs of $250–$500 per square foot for replacement.

This is a conversation worth having with a licensed insurance broker who works with residential construction projects in BC — not just your existing insurer's call centre. The specifics of your policy, your contractor's coverage, and the scope of your project all affect how the gap should be filled.