Structural Engineering Services
From planning to implementation, we’ve got you covered. Let’s bring your project to life together.
Professional Engineering Services
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
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
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
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
Structural Engineering Services
At GranDesign Engineering, we empower homeowners, builders and developers with confidence to progress their project through the doors of city hall by supporting your project with structural design and permit services. At every stage from Site Plan Approval and Building Design to Building Permit and Construction Implementation, we are about safety, detterence, and understanding. Operating out of Whitby, Ontario we pride ourselves on prompt communication, reliable documentation and engineering you can rely on.
What Clients Say
Thank you again
my project: attached garage to a bungalow, double car, with a roof back sloped, using a valley system for water drainage.
Why Choose GranDesign Engineering
Licensed P.Eng
All drawings stamped and certified by Professional Engineers of Ontario.
Professional Experience (30+ Years)
Over 30 years of experience in all categories of construction projects, from residential to commercial.
Fast Turnaround
Optimized processes for the quickest municipal approval times across the GTA.
Competitive Pricing
Professional engineering services at market-leading rates.
Clear Communication
Regular updates on your permit status with dedicated project managers.
GTA & Ajax Expertise
Deep knowledge of individual municipal bylaws and requirements in Ontario.
Who We Work With
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.
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.
Cities and Municipalities We Work With
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.
- Engineered beam sizing (LVL or steel)
- Practical shoring notes for safe construction
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.
- On-site review of framing & supports
- Clear beam/post plan if it is structural
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.
- Egress (windows/exits) + safe layout
- Fire separation details (permit package)
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.
- Foundations + structural framing design
- Tie-ins and key connections to the existing home
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.
- Footing depth + framing spans
- Guardrails + connections to the home
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.
- Municipal comment support
- Fast revisions when needed