MLS Listings — Acoustic Upgrades & Party Wall Insulation
Soundproof Semi-Detached Houses for Sale
36 semi-detached homes currently on MLS where the listing specifically mentions soundproofing, acoustic insulation, or noise-reduction upgrades.
Why Soundproofing Matters in a Semi-Detached Home
The biggest trade-off in buying a semi-detached home has always been the shared party wall. Two families live separated by a single wall — and in older Toronto builds, that wall is often a thin layer of plaster over studs with minimal insulation. Noise from neighbours — footsteps, voices, music, TV — can travel clearly through an uninsulated party wall.
Sellers who invest in acoustic upgrades — Rockwool mineral wool insulation, resilient channels, double drywall, or mass-loaded vinyl — often call it out in the listing because it's a genuine differentiator. These upgrades can achieve STC (Sound Transmission Class) ratings of 55–65+, compared to the basic building-code minimum of STC 45. In plain terms: a properly soundproofed party wall makes a shared home feel like a detached one.
Every listing on this page has had soundproofing, acoustic insulation, or noise-reduction measures specifically mentioned in the MLS remarks. This is a curated shortlist for buyers who put peace and quiet at the top of their must-have list.
36 Soundproof Semi-Detached Homes for Sale
Sorted by newest listing. Prices from $472,832 to $1,699,000.
activeNEW$749,900
MLS® #X1316230831 Francis Street
Carleton Place, ON K7C 2J5
Listings include the term "soundproof," "acoustic," or related noise-reduction language in the MLS description. Updated hourly. Not all soundproofed homes are advertised as such — contact Aldo for unlisted options.
What to Look For Beyond the Listing Description
Ask for the STC Rating
A Sound Transmission Class (STC) rating documents how much sound the wall blocks. Building code requires STC 45 minimum between attached units. High-quality acoustic assemblies achieve STC 55–65+. Request documentation before making an offer.
Commission a Pre-Offer Inspection
A licensed home inspector can assess whether acoustic improvements are structural (inside the wall) or cosmetic (a layer of drywall over an uninsulated cavity). Knowing the difference protects your investment.
Visit During Active Hours
Schedule your showing for an evening or weekend when the neighbouring unit is likely occupied. Normal activity noise — footsteps, voices, television — will tell you far more than a quiet midday walkthrough.
Frequently Asked Questions
What makes a semi-detached home soundproof?+
How do I tell if a semi-detached home is truly soundproofed?+
Is soundproofing common in semi-detached homes?+
Can I add soundproofing after I buy a semi-detached home?+
What is a party wall in a semi-detached home?+
How can Aldo help me find a soundproof semi-detached home?+
Need Help Finding the Right Semi?
Not every soundproofed semi-detached home advertises the fact. Aldo knows the GTA market inside out — including which neighbourhoods, builders, and renovation contractors are known for quality acoustic work. Let him do the hunting for you.
The trademarks MLS®, Multiple Listing Service® and the associated logos are owned by The Canadian Real Estate Association (CREA) and identify the quality of services provided by real estate professionals who are members of CREA.
The information contained in this website is from sources believed to be reliable, but is not guaranteed. It is the responsibility of each real estate agent/salesperson to verify all information. This communication is not intended to cause or induce a breach of any existing agency relationship.
Re/Max Crossroads Realty Inc., Brokerage — 533 Danforth Rd, Scarborough ON M1K 1C9