How do material costs for basement finishing in New Brunswick compare between buying at Home Depot versus through a contractor?

Buying materials yourself at Home Depot or a local building supply store can save 10 to 25 percent on material costs compared to having your contractor supply everything, but the savings come with significant trade-offs in convenience, warranty coverage, and potential project delays. The decision depends on the scope of your project and the arrangement you negotiate with your contractor.

At retail prices from Home Depot in Moncton, Saint John, or Fredericton, here is what typical basement finishing materials cost in 2026. Rigid foam insulation board (2-inch XPS) runs roughly $1.50 to $2.50 per square foot of material. Drywall (half-inch moisture-resistant) costs about $15 to $20 per 4-by-8 sheet. LVP flooring ranges from $2.00 to $5.00 per square foot depending on quality. Dricore subfloor panels run approximately $3.50 to $5.00 per 2-by-2-foot tile. Framing lumber (2x4 studs) costs $4 to $7 each. For an 800-square-foot basement, the raw material cost for a basic finish (insulation, framing, drywall, flooring with subfloor, paint, basic lighting) typically totals $8,000 to $15,000 at retail.

When a contractor supplies materials, they typically mark up between 10 and 25 percent above their cost. However, many established NB contractors buy at contractor pricing from building suppliers — which is already 10 to 20 percent below retail — so their marked-up price to you may only be marginally higher than what you would pay at Home Depot, or in some cases actually comparable. The markup covers the contractor's time sourcing materials, arranging delivery, handling returns and defects, and ensuring the right products arrive at the right time.

There are real advantages to letting the contractor supply materials. First, they carry the warranty and liability for material defects and compatibility — if the drywall they supplied is defective or the wrong insulation was installed, that is their problem to resolve. If you supplied the wrong material, you eat the cost and the delay. Second, contractors know which specific products perform well in NB basement conditions. For example, they will know to specify moisture-resistant drywall for all basement walls, not standard drywall. They will select LVP rated for below-grade installation. They will avoid fiberglass batt insulation against foundation walls — a mistake a well-meaning homeowner at Home Depot might make based on a price comparison with rigid foam.

The biggest risk of homeowner-supplied materials is project delays. If you buy the wrong size, quantity, or type — or if materials are backordered — your contractor's crew sits idle while you sort it out, and most contractors will charge a delay fee or move to another job. In NB's short prime renovation season (May through October), a week's delay can push your project completion into the fall.

The practical middle ground that many NB homeowners take is to supply your own flooring, paint, and fixtures (items where personal taste drives the selection and the cost difference is meaningful) while letting the contractor handle structural materials, insulation, drywall, and electrical and plumbing supplies (items where specification matters more than price). Discuss material supply upfront during the quoting phase — some contractors require supplying all materials as part of their contract, while others are flexible. Whatever you decide, get it in writing before the project starts.

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Looking for experienced contractors? The New Brunswick Construction Network connects homeowners with qualified professionals:

• Gionetterenovations
• Thirty Four Renovations