(416) 882-4606
41 William St, York, Ontario M9N 2G6
Architectural Drawings And Permits
Project
- Three Story New Home in East York
- 2024
Home Additions & Custom Home Builder in Toronto and GTA
We help Toronto and GTA homeowners add space, build custom homes, and convert properties into multiplexes on time, on budget, with permits handled.
98
Client Satisfaction Rate
150+
Custom Projects Across the GTA
17+
Years Building in Toronto
New Renovation Strategy
Convert Your Home Into a High-Yield Multiplex
Turn your existing home into 2-4 legal rental units under one roof. We handle design, permits, and construction together.
$7,000+ /mo
Rental Income
Up to $1.9M
Market Value
100% Legal
Permits Included
- Design, permits and construction under one contract
- Code-compliant work with clear documentation and no shortcuts
- A defined budget before final scope approval
We Know What Keeps You Up at Night
Planning a home addition or custom build in Toronto is one of the most complex financial decisions you will make. Permits, zoning bylaws, budget overruns, and contractor accountability all matter. WellCore handles them under one roof.
Outgrowing your home but unsure which option makes sense?
Second-floor additions, rear extensions, garden suites, and legal multiplex conversions. We help you choose the right solution for your family and your property value.
Confused about zoning rules and city permits?
Our in-house architectural and planning team manages feasibility studies, drawings, and approvals across Toronto and the GTA before construction begins.
Worried about budget overruns or hidden costs?
We work with fixed-price contracts and structured milestone payments tied to progress, so you stay in control of every dollar.
Concerned about quality and accountability?
Dedicated project management, scheduled inspections, and transparent reporting protect your home and your investment at every stage.
How We Build Your Home Addition
or Custom Home in Toronto/GTA
Every WellCore project follows a clear four-stage process from your first consultation to move-in day. Every change is documented, priced, and approved before work continues.
Analysis & Idea
Initial meeting, project feasibility, preliminary budget.
Timeline: 1 week • You get: ballpark estimate
Design & Permits
Architectural drawings, engineering, and permit applications.
Timeline: 8-16 weeks • You get: ready-to-build plans
Construction
Full project management by WellCore with regular updates.
Timeline: 7-9 month • You get: weekly progress reports
Final Finishing
Interior finishes, final inspection, and key handover.
Timeline: 3-5 month • You get: move-in ready home
Why Homeowners Choose WellCore
Since 2007, WellCore has completed residential projects across Toronto and the GTA. As a licensed design-build contractor with an in-house architectural and engineering team, we move faster on permits, reduce delays, and give you one accountable team from the first sketch to the final walkthrough.
17+ Years of Experience
We know Toronto zoning, permitting, and residential construction realities.
In-House Architects
Design and construction stay aligned from the first meeting to the final finish.
Fixed Estimates
Your budget is respected. No surprise costs without written approvals.
Permit Experts
We handle permits, drawings, and committee adjustments so you do not have to.
Quality Guarantee
Every stage is documented, inspected, and reviewed with you.
Design-Build Approach
One team, one budget, and a smoother path than the traditional fragmented process.
WellCore is a BILD member, RenoMark-certified renovator, and HomeStars-verified contractor serving Toronto and the GTA since 2007
What Our Clients Say
We would like to personally thank you, Alex, for taking us through a very exciting journey in renovating our home; which included a second story addition, main floor remodel, and basement apartment
Read moreHonestly we really admired WellCore's professionalism dealing with many unreasonable requests from the city that were not based on written standards
Read moreOverall, I would highly recommend Wellcore. They are genuine and caring and will ultimately ensure that you are satisfied at all steps of the project.
Read moreHome Additions — Case Studies
Our Services — in detail
Home Additions
Wellcore Corporation offers Home Additions & Home Remodeling Services in the Greater Toronto. Contact us today for a FREE consultation with our designers.
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Custom Homes
Build your custom home in Toronto with Wellcore. We offer complete Design & Build services, In-House Architects & Designers, to build your home perfectly.
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Architectural Drawings And Permits
Building a new house? Want to add more space to your existing house? Wellcore Corporation offers complete design and construction services in the GTA.
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Interior Design
Wellcore’s Interior DesignAs a construction firm, we have worked with a large number of interior designers. After years of collaboration, we decided to im...
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Full Home Renovation
Your Current Home SituationThere comes a point when you realize you have outgrown your space and need a change. Your home may require major renovations or custo...
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Duplex and Triplex
Toronto is a unique city for Duplex and Triplex development. Less than a year ago, On May 10, 2023, the Toronto City Council adopted the Official Plan Amen...
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Home Addition & Construction Insights
Practical answers to the questions Toronto homeowners ask most before starting a home addition, renovation, or multiplex conversion.
Up Against the System: The Battle to Get a Building Permit
How a Duplex Helped a Family Skip the Committee of Adjustment
Hidden Dangers of Low Estimates
Hidden Dangers of Low Estimates.We all love deals and discounts. We feel proud when we secure better mortgage rates or higher salaries. Not only does it help with family finances, but we also feel good about ourselves and our negotiating skills. And why wouldn’t we try to lower construction costs a bit?
Don't Relocate. Renovate!
Renovate or Relocate? Find your answer with Wellcore.
Smart Planning. Stunning Results. Wellcore
Building a house involves many people with different skills, goals, and challenges. The process follows a chain reaction: excavation leads to the foundation, the foundation leads to framing, and so on. If one part of this chain has a problem, it can disrupt the entire process.
Questions & Answers
The cost of a home addition in Toronto and the GTA typically ranges from $250 to $500+ per square foot depending on size, structural complexity, finishes, and site conditions.
Rear additions can start lower, while full second-story additions and major rebuilds require larger budgets because they affect the existing house as well.
Yes. Structural changes, additions, and major renovations require drawings, reviews, and municipal approvals. Permit timelines depend on the municipality and whether zoning relief is required.
Most projects move through design, permits, and construction over several months. Smaller scopes can move faster, while larger additions and custom homes require a longer schedule from concept to completion.
In many cases, yes. Eligibility depends on zoning, lot conditions, building code requirements, and the level of work needed to create legal, independent units.
Both are detached secondary dwellings in the backyard. The main difference is site access and municipal rules tied to the lot configuration. We can confirm which option fits your property.