Home Addition Permit Toronto
Planning a second floor, rear, or side addition? Cadaxx Design delivers permit-ready drawings and coordinates everything needed to get your home addition permit in Toronto—from zoning review and Committee of Adjustment (CoA) to structural and HVAC engineering. We’ve guided homeowners across the GTA through City comments and approvals, minimizing delays and surprises. Whether you need extra bedrooms, a larger kitchen, or a full second storey, we design for code compliance, constructability, and budget. Start with a quick feasibility check: we’ll confirm setbacks, lot coverage, FSI, height, and parking before you invest in design.
Zoning Review & Feasibility
We verify your lot’s zoning (RD/RS/RT, CR overlays), setbacks, lot coverage, FSI, height, platforms/decks, parking, and any TRCA/heritage constraints. You’ll get a clear “as‑of‑right vs variance” path before we design.
When You Need the Committee of Adjustment (CoA)
If your addition exceeds zoning by-laws, we prepare minor variance packages—plans, statistics, and a concise planning rationale—and represent you at CoA. We also handle neighbor outreach and refine drawings based on feedback and conditions.
Permit Drawings Package
Building plans, elevations, sections, enlarged details, OBC matrix, statistics table, site plan, and typical construction notes. We coordinate structural (LVLs/steel, foundations) and HVAC (heat‑loss/ducting). Stamped engineering included where required.
Process & Timeline
Discovery call → 2) Zoning check & proposal → 3) Concept design → 4) CoA (if needed) → 5) Permit drawings & engineering → 6) City submission → 7) Revisions/approval → 8) Construction start. Typical permits: 4–10 weeks after submission (City queue dependent). CoA will add 3-4 month to this timeline
Budget & What Affects It
Design/permit fees depend on size, variances, and engineering complexity. Construction costs vary by scope, finishes, and site access. We’ll price options early and suggest phasing if helpful.
Why Cadaxx
BCIN‑qualified design team, strong working relationships with municipal examiners, proven CoA strategies, and detailed, buildable drawings. We stay with you through permit comments until approval.
Get a Free Zoning Check
Send your address and a short brief.
We’ll reply with feasibility and next steps for your home addition permit in Toronto.
This Forest Hill project features a rear addition with upgraded basement walkout and open-concept main floor.
Cadaxx managed zoning review, Committee of Adjustment application, and full permit drawings with structural and HVAC coordination.
The design blends modern function with traditional style while meeting Toronto’s residential zoning requirements.
A complete transformation of a Scarborough bungalow into a full two-storey home.
Cadaxx prepared zoning review, Committee of Adjustment submission, and detailed permit drawings with structural and HVAC coordination.
The design added three bedrooms and a new staircase while maintaining existing footprint efficiency and neighborhood character.
Comprehensive redesign of an older bungalow, adding a new second storey and a detached rear garage.
Cadaxx managed zoning feasibility, CoA variances, and full permit set coordination.
The addition modernizes the façade, expands interior space, and maximizes lot use within Toronto’s residential by-law limits.
This Mississauga home was expanded with a full second floor, transforming it into a modern, spacious residence.
Cadaxx Design handled the design, permit coordination, and construction details.
The addition introduced new bedrooms and updated finishes while maintaining harmony with the existing structure and surrounding streetscape.
A modrn side addition to enhance entry flow and add functional space for storage and stairs.
Cadaxx completed full permit drawings, zoning compliance check, and structural layout for new foundation and framing. The design maintains proportional aesthetics while improving interior circulation and daylight.
