Your home is your most valuable asset. Whether you’re building a brand new custom home, adding a second storey, converting your basement into a legal apartment, or creating a garden suite in your backyard — every residential project in Ontario requires accurate, code-compliant architectural drawings to get approved. At ITI Permit, we provide professional residential architecture services backed by BCIN-certified designers who understand Ontario Building Code requirements inside out. We serve homeowners, builders, and contractors across Hamilton, Toronto, Mississauga, Brampton, Oakville, Niagara Falls, Stoney Creek, Waterdown, and throughout Ontario — trusted since 2012.
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Residential architecture involves the design, planning, and documentation of homes and living spaces — from a single-family house to a multi-unit residential conversion. In Ontario, residential building permit applications must include drawings prepared by a BCIN-certified designer to be accepted by municipalities.
A professional residential architecture service ensures your project is:
Getting residential architecture right from the beginning saves you time, money, and the stress of dealing with rejected permits or stop-work orders.
Building your dream home from the ground up? Our designers work with you from the very first sketch to a complete set of permit-ready construction drawings. We design custom homes that reflect your lifestyle, budget, and site conditions — while meeting all Ontario Building Code and municipal zoning requirements.
Need more space without moving? We design and document second storey additions, rear additions, and side additions that integrate seamlessly with your existing home structure. Our drawings cover all required floor plans, elevations, structural details, and site plans needed for permit approval.
Converting your basement into a legal rental unit is one of the smartest investments an Ontario homeowner can make. ITI Permit specializes in legal basement apartment drawings that meet Ontario Building Code requirements for ceiling height, egress windows, fire separations, and ventilation — giving your basement suite a clean permit approval.
Converting a single-unit dwelling into a duplex, triplex, or fourplex is a specialty of ITI Permit. We prepare all required architectural drawings for multi-unit conversion projects — from floor plan redesign to permit submission — helping Ontario homeowners maximize their property’s rental income potential.
Garden suites and backyard ADUs are increasingly popular across Ontario as a way to add rental income or house family members. We design fully code-compliant ADU and garden suite drawings — handling zoning review, floor plans, elevations, and the full permit submission process.
Converting an attached or detached garage into a living space, home office, or rental unit requires proper architectural drawings and a building permit. Our team prepares complete garage conversion drawings that meet Ontario Building Code requirements and sail through municipal review.
Decks, pergolas, sheds, and other accessory structures often require building permits in Ontario. We prepare permit-ready drawings for all types of accessory structures — ensuring your outdoor project is compliant, safe, and approved without delays.
Structural changes to kitchens and bathrooms — such as removing walls, relocating plumbing, or altering load-bearing elements — typically require a building permit in Ontario. We prepare all required architectural drawings for kitchen and bathroom renovation permits quickly and accurately.
Renovating a heritage-designated home in Ontario requires special care and compliance with heritage preservation guidelines. ITI Permit has experience preparing architectural drawings for heritage properties — balancing modern renovation goals with the municipal requirements that protect the character of historic homes.
We don’t just prepare your drawings — we manage the complete permit submission to your local municipality and handle all correspondence with officials until your residential building permit is approved.
Our residential architecture services are available for:
In Ontario, residential building permit drawings must be prepared by a BCIN-certified designer. Every project at ITI Permit is handled by fully certified professionals — giving your municipality the confidence to approve your permit without revisions.
Duplex, triplex, and fourplex conversions are one of our core specialties. We’ve helped hundreds of Ontario homeowners unlock the rental income potential of their properties through expertly prepared conversion drawings and permits.
With over a decade of experience in Ontario residential architecture and building permits, we know exactly what municipalities expect — and how to get your project approved the first time.
Quality residential architecture services at the most economical rates in Ontario. We provide transparent quotes before any work begins — no hidden fees, no surprises.
Residential timelines matter. Whether you’re trying to start construction before winter or meet a contractor’s schedule, our team delivers drawings faster than most Ontario firms without compromising quality.
We have a physical office where you can walk in, meet our team face to face, and discuss your residential project in detail. We believe in relationships, not just transactions.
Quick responses, proactive project updates, and zero unnecessary delays — from first consultation to permit approval.
Step 1 – Free Consultation We discuss your project goals, site conditions, zoning restrictions, and budget. You receive a clear, transparent quote with no hidden costs.
Step 2 – Zoning & Code Review We review your property’s zoning bylaws, setback requirements, lot coverage limits, and Ontario Building Code requirements before any design work begins.
Step 3 – Architectural Design & Drawings We develop all required residential drawings — floor plans, elevations, cross-sections, site plans, and all supporting documentation for permit submission.
Step 4 – Revisions & Approval We incorporate your feedback and revise drawings until you are fully satisfied with the design.
Step 5 – Permit Submission We submit your complete drawing package to the municipality and manage all follow-up communication with officials until your permit is issued.
Step 6 – Build with Confidence With your permit approved, you’re ready to begin construction. We’re available for any post-approval support you need during the build.
We provide residential architecture services in:
Yes. In Ontario, most residential building permit applications must include drawings prepared by a BCIN-certified designer. This is required by the Ontario Building Code to ensure your plans are safe, compliant, and acceptable to your municipality.
Most structural changes to a home require a building permit in Ontario. This includes new builds, home additions, second storey additions, basement apartment conversions, garage conversions, decks over a certain size, and any renovation that involves structural, plumbing, or electrical changes.
Yes. ITI Permit specializes in legal basement apartment drawings that meet Ontario Building Code requirements for ceiling height, egress windows, fire separations, smoke alarms, and ventilation — ensuring your basement suite gets approved without issues.
Absolutely. Converting a single-unit dwelling to a duplex, triplex, or fourplex is one of our core specialties. We prepare all required architectural drawings and manage the full permit process for conversion projects across Ontario.
Yes. We design fully code-compliant ADU and garden suite drawings for Ontario homeowners — covering zoning review, floor plans, elevations, site plans, and complete permit submission.
Yes. ITI Permit has experience preparing architectural drawings for heritage-designated homes in Ontario, balancing your renovation goals with heritage preservation requirements set by your municipality.
Timelines depend on project size and complexity. ITI Permit is known for faster-than-average turnaround times in Ontario. Contact us with your project details for a specific estimate.
Costs vary based on project scope. ITI Permit offers some of the most competitive rates for residential architecture services in Ontario. We provide a transparent quote before work begins — no hidden fees.
Whether you’re building a new custom home, adding a second storey, converting your basement, or designing a garden suite — ITI Permit’s BCIN-certified residential architects and designers are ready to help you move from idea to approved permit, faster and at a price that works for you.
📍 Serving: Hamilton | Stoney Creek | Waterdown | Toronto | Brampton | Mississauga | Oakville | Niagara Falls | Ontario 📞 Call us today for a free consultation 🌐 Visit Google Map: https://share.google/F4gArxO2qA47C8CRS
Trusted by Ontario homeowners, builders & contractors since 2012.
Ontario's Most Trusted BCIN-Certified Architecture, Building Permits & Licensing Services — Serving Hamilton, Toronto, Mississauga, Brampton, Oakville, Niagara Falls, Stoney Creek & Waterdown Since 2012.
