YOUR GATEWAY
TO BUILDING IN
THE GTA.
From Site Plan Approval to Construction Implementation — everything your renovation, addition, or development needs to move through city hall, backed by a licensed P.Eng.
Thank you again
my project: attached garage to a bungalow, double car, with a roof back sloped, using a valley system for water drainage.
Thank You Mohammad. We are extremely pleased with the end result.
Punctual, Responsive, Quick, Efficient and Excellent Customer care.
Our Services.
Home Addition Permits
Add space with confidence. We engineer foundations, floor framing, roof tie-ins, and key connections so the new work integrates cleanly with the existing structure.
- Second Storey Addition Design
- Rear & Side Extension Engineering
- Garage Conversions & Extensions
Basement & Secondary Unit Permits
Permit drawings for legal basement apartments and secondary suites. We coordinate life-safety details like egress, fire separation, and required supporting plans.
- Legal Second Unit Permit Drawings
- HVAC, Plumbing & Fire Safety Plans
- Separate Entrance Engineering
Load-Bearing Wall Removal
Create an open-concept layout safely. Includes site review, engineered beam sizing, and practical shoring notes to support construction.
- LVL & Steel Beam Engineering
- Structural Shoring Schedules
- Load Path Analysis & Post Support
Residential Building Permit Drawings
P.Eng-stamped structural drawings for custom homes and major renovations. We prepare complete permit-ready sets and support your application through review comments.
- Custom Home Architectural & Structural Sets
- Structural Steel & Framing Design
- Foundation & Footing Engineering
Deck & Porch Permit Drawings
Code-aligned deck and porch designs with clear spans, connections, and guard details. We specify footing depths and structural members for safe outdoor spaces.
- High-End Multi-Level Decks
- Covered Porches & Patio Roofs
- Helical Pile & Footing Specs
Commercial Building Permits
Tenant improvements, retail fit-outs, and restaurant renovations. We deliver P.Eng-stamped drawings designed for faster review and smoother approvals.
- Retail & Office Interior Fit-outs
- Change of Use & Occupancy Permits
- Mezzanine & Racking Engineering
Inspections & Engineer Letters
On-site structural assessments with clear written findings. Ideal for real-estate conditions, foundation concerns, or building department requests.
- Structural Integrity Inspections
- Foundation Crack & Settlement Reviews
- Municipal Work Order Remediation
Civil Engineering Support
Grading plans and drainage layouts to support permit submissions. We help ensure site runoff and stormwater considerations are addressed clearly.
- Lot Grading & Drainage Plans
- Sewer & Servicing Design
- Garden Suite Feasibility Studies
Drafting & Permit Coordination
Accurate CAD drafting across residential and commercial permit types. We coordinate revisions, organize supporting documents, and help keep submissions on track.
- Full BCIN & P.Eng Drafting Sets
- Municipal Comment Support & Revisions
- As-Built Drawing Documentation
From groundbreaking to grand opening
Every project, built one careful step at a time.
Additional Coordinated Services
Some building permit applications require supporting documents from other disciplines. When needed, we coordinate these items so your submission is complete, consistent, and moves forward with fewer delays.
Electrical Design Coordination
If your project requires electrical drawings, we coordinate the required layouts and documents for permit submission.
Mechanical & HVAC Coordination
For basement units and larger renovations, we coordinate HVAC and ventilation drawings when required.
Survey Services
If your permit drawings need accurate site measurements or boundary information, we coordinate survey services to support the application.
Grading Plans
When drainage or grading details are requested, we coordinate grading plans to keep the submission complete and review-ready.
Ontario’s building-permit process rewards precision.
GranDesign Engineering ensures your entry into the permit process is structured, compliant, and positioned for approval — the first time. Whether it’s a homeowner’s renovation or a developer’s commercial build, we bring the same P.Eng-certified rigor to every drawing.
Who We Serve.
We provide precision structural engineering tailored to the unique needs of property owners and construction professionals.
Homeowners
Expert structural engineering for renovations, additions, and basement finishing. We turn your vision into a safe, compliant, and lasting reality.
Industrial Property Owners
Specialized solutions for warehouses and distribution centers. We support compliance, load-bearing integrity, and operational efficiency.
Contractors & Builders
Built for speed and coordination. We deliver accurate plans that reduce rework, streamline inspections, and keep projects on schedule.
Have a Plan: Structured Execution From Sketch to Stamp.
Our ServicesSite Review & Scoping
- Reviewing your project goals and mapping the specific permit pathway your municipality requires.
- Identifying structural, zoning, or code considerations specific to your property.
- Confirming scope, timeline, and fee before any drawing begins.
Structural Design & Drafting
- Producing P.Eng-stamped structural drawings tailored to your specific renovation, addition, or build.
- Coordinating electrical, HVAC, survey, or grading documents where a submission requires them.
- Reviewing drawings with you before they’re submitted to the municipality.
Permit Support & Sign-Off
- Responding quickly to municipal comments or requests for revisions.
- Providing site reviews, inspections, and engineer letters through construction.
- Staying available for questions until your project is signed off.
Experience You Can Measure.
All drawings stamped and certified by Professional Engineers of Ontario.
Over 30 years of experience in all categories of construction projects, from residential to commercial.
Optimized processes for the quickest municipal approval times across the GTA.
Professional engineering services at market-leading rates.
Regular updates on your permit status with dedicated project managers.
Deep knowledge of individual municipal bylaws and requirements in Ontario.
Precision, Communication, Accountability.
GranDesign combines certified engineering rigor with a client-first approach — three commitments that shape every project we take on.
Licensed P.Eng, certified for Ontario
Every drawing that leaves our office is stamped and certified by Professional Engineers of Ontario, backed by 30+ years of experience across residential, industrial, and commercial construction.
Clear communication, fewer delays
We coordinate electrical, HVAC, survey, and grading documents when a submission requires them, and respond fast when the municipality sends comments — so your project keeps moving.
Client-first engineering
We treat your project as if it were our own — driven by accountability, precision, and pride in getting it right, from the first site visit through final sign-off.
Building Permit & Structural Engineering FAQs
Do I need a permit to remove a load-bearing wall?
In most cases, yes. If the wall is structural, the Town will typically require a building permit and engineered drawings showing the beam, posts, and how the loads are supported.
How can I tell if a wall is load-bearing in my home?
Some walls are simple partitions, while others support floor or roof framing. The safest way to know is to review the framing direction, supports below, and what’s happening in the basement or crawlspace.
What usually gets reviewed for a basement secondary unit permit?
Most basement applications focus on life-safety items like safe exits, fire separation, and layouts that meet code. If you’re cutting new openings or changing framing, structural details are reviewed too.
For a home addition permit, what do you actually design?
We design what keeps the addition standing and tied into your existing home — foundations/footings, floor framing, roof framing, and connection details so the new work integrates cleanly and performs well over time.
Do decks and porch roofs need permits in Whitby?
Often, yes — especially if the deck is elevated, attached to the house, multi-level, or includes a covered roof. Permits typically focus on footings, spans, connections, and guardrails.
Can you help if the Town of Whitby requests revisions or extra details?
Yes. If the reviewer asks for clarifications, we update the drawings and respond with clear notes so your application can move forward without unnecessary delays.
Do I need a building permit for a commercial renovation?
Many commercial renovations require a building permit, especially when the work changes layout, exits, washrooms, structure, mechanical systems, plumbing, electrical systems, fire safety, occupancy, or use of the space. We can review your scope and prepare the drawings needed for submission.
Can you provide structural drawings for commercial spaces?
Yes. We provide structural drawings for commercial projects involving beams, posts, openings, mezzanines, equipment supports, racking, slab concerns, foundation changes, or other load-bearing modifications.
Build Your Future With GranDesign.
Partner with us for structured permits, seamless approvals, and engineering built to last. Tell us about your project and we’ll walk you through exactly what your municipality needs.
Request a Quote
Tell us about your project — we typically respond within one business day.