Cadaxx Design prepared complete permit drawings for a house extension on Botfield Dr, Toronto, adding a new second floor and rear addition. The project, now under construction, showcases Cadaxx’s ability to transform existing homes with OBC-compliant design, structure, and permit coordination. Cadaxx delivers accurate, City-approved solutions for house extensions and home additions across Toronto and the GTA.
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Project Overview
This ongoing extension project expands the home both vertically and to the rear, creating more family space while maintaining the existing foundation and structure. Cadaxx coordinated zoning, structure, and OBC compliance to obtain City approval before construction began.
Key Details
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Location: Botfield Dr, Toronto
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Type: House Extension (Second Storey + Rear Addition)
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Scope: Design · Structural Coordination · Permit Drawings
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Status: Under Construction
Highlights
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Second-storey framing and rear addition underway
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Reinforced foundation and wall structure
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Energy-efficient envelope with modern materials
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Updated façade for a clean contemporary look
Design & Structural Coordination
Cadaxx coordinated with engineers to design new LVL and steel beam systems to support the upper floor and rear extension.
The new façade features modern proportions and flat-roof detailing while preserving the home’s footprint.
Design Features:
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Load-bearing reinforcement for new floors
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Structural tie-ins to existing foundation
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Enhanced thermal and moisture performance
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Contemporary elevation with large window openings
Design Consideration
At the early design stage, we explored several traditional architectural options for this custom home at Botfield Avenue. The initial concepts featured classical symmetry, detailed cornices, and stone cladding with decorative moldings — evoking a timeless elegance.
However, as the design process evolved, the client expressed a clear preference for a modern aesthetic — emphasizing clean lines, larger glazed areas, and a minimal material palette.
The final design reflects this shift: a bold, contemporary façade combining stone and metal panels, expansive windows for natural light, and a restrained geometric composition.
This transformation from classic to modern demonstrates our flexible design approach — ensuring that each home is tailored to the client’s taste while maintaining architectural balance, proportion, and contextual sensitivity to the surrounding neighborhood.
Short Video
3D Model
Construction Progress
Construction is progressing on schedule, with framing and roof work nearing completion.
Cadaxx continues to assist with site coordination and detail clarifications to ensure full compliance with the Ontario Building Code and approved permit drawings.
Permit Process
Cadaxx Design managed every step of the permit approval for this Botfield project:
1️⃣ Site measure and as-built plans
2️⃣ Zoning review and analysis
3️⃣ Structural coordination
4️⃣ Preparation of permit-ready drawings
5️⃣ City of Toronto submission and revisions
6️⃣ Support during construction
FAQs — House Extensions in Toronto
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Q1: Do I need a permit for a house extension in Toronto?
Yes. Any expansion to the existing footprint or second storey requires a building permit and OBC review. Cadaxx prepares and submits the drawings for approval. -
Q2: How long does it take to get a house extension approved?
Typically 6–10 weeks, depending on City review time and project complexity. -
Q3: Can I add a rear extension and second floor together?
Yes. Combined projects are common and cost-efficient. Cadaxx coordinates the design and structure as one permit set. -
Q4: Will my existing foundation support a second storey?
Cadaxx reviews foundation capacity with a structural engineer and designs reinforcements where required. -
Q5: Does Cadaxx handle the entire process?
Yes — from zoning and design to permit submission and construction support, Cadaxx manages the project end-to-end.
Related Project – Rustic Dr Extension
The Botfield Dr extension follows similar design and structural coordination principles used in the Rustic Dr project, where Cadaxx completed a second-storey addition on an existing bungalow.
👉 View Rustic Dr Project
Why Choose Cadaxx
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Experts in house extensions and major home additions
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BCIN-licensed drawings and OBC coordination
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Fast City approvals and precise structural design
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Trusted by Toronto homeowners for comprehensive permit solutions
Start Your House Extension in Toronto
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Cadaxx Design helps homeowners expand their living space through smart, OBC-compliant house extensions approved by the City of Toronto.
Contact us to begin your home extension project.