Home Additions Markham– Transform Your Living Space
Limited Time Cash Back Offers – Save Up to $7,499!
- ✔ 100% Fixed Costs – No Hidden Fees
- ✔ Time & Budget Guaranteed
- ✔ Free Expert Design Consultations
- ✔ Licensed, Verified & Insured Contractors
- ✔ 1-Year Labour Warranty | Financing Available
Rated ⭐ 4.9 on HomeStars | WSIB Compliant | 15+ Years Experience
Home Additions Toronto
Limited Time Cash Back Offers Up to $10,000*
Your Vision. Our Expertise. One Seamless Home Addition.
For over 15 years, BB Construction has helped Markham families unlock more space, comfort, and value through beautifully designed home additions. Whether you need to extend your kitchen, add a second storey, create a rental suite, or build a laneway house—our experienced team of designers, engineers, and builders will bring your vision to life with care, compliance, and craftsmanship.
Our Markham Home Addition Services
Basement Walkout Additions
Maximize your home’s value and functionality. A basement walkout provides natural light, independent access, and is perfect for rental income or multi-generational living.
Second-Storey Additions
Need more space without losing backyard area? A full second-storey addition is the perfect way to double your square footage, add privacy, and completely reimagine your home.
Bungalow Top-Ups
A second floor on your bungalow gives growing families more room without expanding the footprint. We handle zoning, engineering, and structural planning to make it seamless.
Back-of-House Room Additions
Expand your kitchen, family room, or add an in-law suite at the rear of your home. Ideal for lots with backyard space—no disruption to existing interior layouts.
Home Extensions
From ground-level bedroom additions for aging parents to expanding bathrooms or kitchens, we help you increase usable space while maintaining flow and design integrity.
Laneway Suites
Turn your rear yard into income-generating or multi-family living space. We specialize in modern, legal laneway homes—even on narrow lanes—fully compliant with Markham’s zoning regulations.
Garden Suites
Add a private rental or in-law suite separate from the main house. Our garden suites are thoughtfully designed, energy-efficient, and include full permitting support.
Load-Bearing Wall Removal
Need to open up space indoors before adding on? We safely and structurally remove load-bearing walls and provide custom steel beam installation per engineering guidelines.
Navigating Permits & Building Regulations
Our experts ensure your project is fully code-compliant with Markham’s building standards and zoning laws. We’ll manage:
- All permit applications (building, electrical, plumbing, HVAC)
- Architectural & engineering plans
- Coordination with the Electrical Safety Authority and City Building Division
- Compliance with fire safety, ceiling height, and structural codes
Our Renovation Projects
Project Gallery
Our Proven 5-Step Home Addition Process
Why Choose BB Construction for Your Home Addition?
Comparison:
Other Contractors ❌
- Unclear Timelines
- Surprise Costs
- Basic Designs
- Poor Communication
- Unlicensed Workers
- No Warranty
BB Construction ✅
- 100% Time Guarantee
- Fixed Pricing Contracts
- Free Professional Design
- Dedicated Project Manager
- WSIB-Covered, Verified Trades
- 1-Year Labour Warranty
What Our Clients Are Saying
Let's Start Building Your Home Addition Today
Get the space you need—without the stress. Whether you’re adding a new floor, extending your living area, or building a secondary suite, we’re your one-stop shop for architecture, engineering, construction, and permits.
Areas We Serve
- Toronto
- Mississauga
- North York
- Vaughan
- Milton
- Barrie
- Hamilton
- Maple
- Brampton
- Oakville
- Markham
- Burlington
- Newmarket
- Innisfil
- Bolton
- Cambridge
- Kitchener
- Waterloo