How much does a full room soundproofing project with specialty drywall cost in the Greater Toronto Area?

A full room soundproofing project using specialty drywall in the GTA typically costs between $5,000 and $20,000 depending on the room size, the level of sound isolation required, and whether you're building new walls or adding to existing ones. A small bedroom or home office runs toward the lower end, while a large basement home theatre or music room with high-performance requirements pushes well above $15,000.

To break this down in practical terms, let's look at what goes into a typical GTA soundproofing project room by room. The cost per square foot of wall and ceiling surface is the most useful way to compare, because room size is the single biggest variable.

Standard soundproofing upgrade — adding a single layer of QuietRock ($55-$90 per 4x8 sheet) over existing walls and ceiling on resilient channel — runs about $5.00-$8.00 per square foot of treated surface, installed and finished. For a 12x12 bedroom with 8-foot ceilings, that's roughly 560 square feet of wall and ceiling surface, putting the project at $2,800-$4,500 for materials and installation, plus finishing and ancillary costs that bring it to $4,000-$6,500 total.

Mid-range soundproofing — resilient channel with double-layer 5/8-inch drywall and Green Glue damping compound between layers — is the sweet spot most GTA contractors recommend for serious noise reduction. This assembly achieves STC 52-58 depending on the existing wall construction and insulation. The installed cost runs $6.00-$10.00 per square foot of treated surface. For that same 12x12 room, you're looking at $5,500-$9,000 all-in including taping, finishing, electrical outlet extensions, and a solid-core door upgrade.

High-performance "room within a room" construction — independent stud walls with an air gap, double drywall with Green Glue on both the existing and new walls, mineral wool in all cavities, floating floor, and isolated ceiling — is what recording studios and serious home theatres require. This level pushes $10.00-$18.00 per square foot and a full room can easily reach $15,000-$25,000 or more in the GTA. You also lose 3-5 inches of room dimension on each treated wall.

Beyond the drywall itself, several additional costs are unavoidable in a proper soundproofing project. Mineral wool insulation (Roxul Safe'n'Sound or equivalent) in the wall cavities adds $1.20-$1.80 per square foot — this is strongly recommended because it absorbs sound energy within the cavity and prevents the hollow wall from acting as a drum. Acoustical caulk for sealing every perimeter joint, electrical penetration, and gap runs $200-$500 per room in materials alone. Electrical work to extend outlet and switch boxes through the additional wall thickness typically costs $500-$1,500 depending on the number of outlets. And the door is always the weakest link — upgrading to a solid-core door with proper weatherstripping and a door sweep costs $600-$1,500 installed, while a purpose-built acoustical door runs $2,000-$4,000.

GTA drywall costs for soundproofing projects are 25-35% higher than smaller Ontario markets due to higher labour rates, disposal costs for removed materials, and the logistical challenges of working in urban Toronto homes with limited parking and tight access. Condo projects carry additional premiums because of building access restrictions, construction hour limitations (typically 9 AM to 5 PM weekdays in most Toronto condo buildings), elevator booking requirements, and dust containment measures.

One important consideration for GTA homeowners is that soundproofing is only as good as its weakest point. A $15,000 wall and ceiling assembly is undermined by a hollow-core door, an unsealed electrical outlet, or an HVAC duct that connects the soundproofed room to the rest of the house. Professional soundproofing contractors understand flanking paths and will address all of them — this is not a project where cutting corners saves money, because partial soundproofing often produces disappointing results relative to the investment.

For an accurate quote on your specific room, get matched with a soundproofing-experienced drywall contractor through Toronto Drywall Installers — measurements and an assessment of the existing wall construction are essential for a reliable estimate.