Expert Home Additions Contractor
Toronto’s Most Trusted Design-Build Team Since 1981
Expert Planning • Fixed Price Guarantee to Build to Agreed Budget • Award-Winning Results
See how we can maximize your home’s floor space!
Toronto's Most Experienced Home Addition Contractor
When your family outgrows your home but you love your neighbourhood, a home addition is the smart solution. Partex Design Build has been helping Toronto homeowners expand their living space since 1981.
Third-Generation Building Expertise
Andrew Parker’s grandfather founded the original Par-Tex in 1928. His father joined in 1964. Andrew established Partex Design Build in 1981. Nearly a century of Ontario building expertise working on your home.
Whether you’re adding a second story, extending your main floor, or building a custom addition, we handle everything — from initial design and engineering to permits and construction. One team, one point of contact, one accountable partner for your entire project.
Why Toronto Homeowners Choose Home Additions
Moving is expensive and stressful. A home addition lets you stay where you love.
Save $100,000+
Avoid real estate commissions, land transfer taxes, legal fees, and moving costs. A home addition is often half the cost of buying a larger home.
Increase Home Value
Well-planned additions can return 50-80% of construction costs at sale. You get the space now AND build equity for later.
Stay in Your Neighborhood
Keep your kids in the same schools, stay near friends and family, and maintain the community connections you’ve built.
Get Exactly What You Need
Design your addition around your lifestyle. No compromise. No settling for “close enough” like you would when buying.
Work With the Best
43 years of experience, third-generation expertise, and award-winning quality. No other Toronto contractor has our track record.
Transparent Pricing
Our spreadsheet system shows you projected costs before you commit. We design to your budget, not around it.
Types of Home Additions We Build
Compare Your Options
From second stories to bump-outs, we have the expertise to expand your home.
Second Story Additions
Add 600-1,200 sq ft without sacrificing yard space. Perfect for Toronto’s narrow lots.
Rear Additions
Expand your kitchen, add a family room, or create open-concept living space.
Side Additions
Perfect for wider lots. Add a garage with living space above, or expand main floor.
Bump-Out Additions
Add 50-150 sq ft for a larger kitchen, powder room, or expanded dining area.
Every project is unique.
Book a free consultation for a detailed estimate tailored to your home
Our Design-Build Process
From first conversation to final walkthrough, we guide you every step of the way
Free Consultation
We visit your home, discuss your goals, and provide a preliminary budget range. No charge, no obligation.
Design Development
We create detailed designs with transparent pricing. See projected costs before committing.
Permits & Engineering
We handle all drawings, engineering, and building permits. 43 years of experience with Toronto’s permit process.
Construction
Our crews build your addition with Andrew Parker overseeing every project personally.
Final Walkthrough
Quality inspection and handover of a home that exceeds your expectations.
Toronto Permits & Zoning
Navigating Toronto’s building regulations requires experience. With 43 years of working with the City of Toronto, we know the process inside and out.
- Building Permits
Required for all home additions. We prepare and submit all drawings and documentation.
- Committee of Adjustment
If your addition requires variances for setbacks, height, or lot coverage, we represent you at COA hearings.
- Heritage Permits
For homes in heritage conservation districts, we navigate the additional approval process.
- Tree Permits
If protected trees are affected, we handle permit applications and arborist reports.
Compare Your Options
Which type of addition is right for your home?
Factor
Second Story
Rear Addition
Moving
Yard Space
- Preserved
- Reduced
- Unknown
Timeline
6-10 months
4-7 months
6-12 months
Disruption
May relocate temporarily
Usually can stay
Complete relocation
Customization
- 100% custom
- 100% custom
- Limited to what's available
Keep Neighbourhood
- Yes
- Yes
- Usually no
Factor
Second Story
Rear Addition
Moving
Yard Space
- Preserved
- Reduced
- Unknown
Timeline
6-10 months
4-7 months
6-12 months
Disruption
May relocate temporarily
Usually can stay
Complete relocation
Customization
- 100% custom
- 100% custom
- Limited to what's available
Keep Neighbourhood
- Yes
- Yes
- Usually no
Factor
Second Story
Rear Addition
Moving
Yard Space
- Preserved
- Reduced
- Unknown
Timeline
6-10 months
4-7 months
6-12 months
Disruption
May relocate temporarily
Usually can stay
Complete relocation
Customization
- 100% custom
- 100% custom
- Limited to what's available
Keep Neighbourhood
- Yes
- Yes
- Usually no
Client Testimonial
Frequently Asked Questions
How long does a home addition take?
Most additions take 6-8 months from permit to completion. Planning and design typically add 2-3 months before construction begins.
Do I need to move out during construction?
For most additions, you can remain in your home. For major second-story additions, we may recommend temporary relocation during specific phases.
Will my addition match my existing home?
Absolutely. We design every addition to integrate seamlessly with your existing architecture, matching rooflines, materials, and details.
Do you handle permits and engineering?
Yes. We manage all permit applications, structural engineering, and Committee of Adjustment hearings when variances are needed. With 43 years of experience working with the City of Toronto, we know the process thoroughly.
What areas do you serve?
We serve Toronto, Mississauga, Oakville, Vaughan, Richmond Hill, Markham, Etobicoke, North York, Scarborough, and the Greater Toronto Area. We’ve been building across the GTA since 1981.
How much does a home addition cost?
What's included in your price?
Is building up or out cheaper?
Do I need a variance for my addition?
Why choose Partex over other contractors?
Areas We Serve
Building home additions across the Greater Toronto Area since 1981
Toronto
Mississauga
Oakville
Vaughan
Richmond Hill
Markham
Richmond Hill
Markham
Etobicoke
North York
Etobicoke
North York
Scarborough
East York
Thornhill
Woodbridge
Ready to Expand Your Home?
Contact Partex Design Build for a free consultation. We’ll visit your home, discuss your vision, and provide a realistic budget range — no obligation.
Phone: 416-504-9455
Email: andrew@partex.ca