Home Addition Contractors in Kitchener – Waterloo Region
Outgrowing Your Home, But Don’t Want to Move?
Whether you’re planning a new room, building up with a second storey, or extending out with a rear addition, Mosaic Arch is a trusted team of home addition contractors and home extension contractors helping to expand clean, structurally sound additions that feel like they’ve always been part of your home.
Our Home Addition & Extension Services
Room Additions
New bedrooms, nurseries, offices, family rooms, or mudrooms designed to match your existing home’s layout and exterior.
Home Extensions (Rear or Side Extensions)
Expand your kitchen, dining, or main living areas by extending the footprint—perfect for open-concept upgrades and better daily flow.
Second-Storey Additions
Add significant space without losing yard area. Ideal for growing families, extra bedrooms, or a full upper-level expansion.
Bump-Out Additions
Small footprint increases with big impact—great for expanding kitchens, bathrooms, stair landings, or creating extra storage.
Primary Suite / Master Suite Additions
Create a private retreat with a larger bedroom, walk-in closet, and optional ensuite expansion.
In-Law Suites
Add flexible living space for multi-generational living or guest use—planned for comfort, privacy, and functionality.
Sunrooms & Enclosed Additions
Bring in natural light and add a bright multi-season space for lounging, dining, or entertaining.
Garage Conversions / Over-Garage Additions
Convert unused garage space into living space, or build above the garage for additional rooms and functional square footage.
Planning Support + Permit Coordination
Home additions require careful planning and permits. We help coordinate the build process so it stays organized, compliant, and clear from start to finish.
Home Additions Project Gallery
What Our Clients Say
Homeowners choose Mosaic Arch for reliability, transparency, and results.
Tyshawn Lajoie
Home Owner
Mariane
Home Owner
Bibi Khan
Home Owner
Carolyn Nadeau
Home Owner
Sue Kameka
Home Owner
Britney Bsi
Home Owner
Dwayne Dawson
Home Owner
Pankaj
Home Owner
KW Education
Business Owner
Sherry Arbabi
Home Owner
Why Choose Mosaic Arch for Home Additions & Extensions
- Experienced home extension builders with renovation-first thinking
- Clear scope, transparent pricing, and realistic timelines
- Seamless integration with your existing layout and exterior look
- Proper coordination for structural work and next-step phases
- Clean, organized, and respectful job sites
- On-time completion with minimal disruption
Our Simple Renovation Process
Step 1: Discover
We understand your goals, space, and budget before recommending solutions.
Step 2: Quote
You receive a clear, transparent quote with no hidden surprises.
Step 3: Build
Our team brings your vision to life with precision and care.