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Architectural concept: a rounded terracotta brick Toronto infill home at blue hour, with warm illuminated windows

Thoughtful infill.
Clear decisions.

Architecture and property research for Toronto multiplexes, laneway suites and garden suites. Check an address to review the site records and explore development options.

Free · No payment required

01 / Explore the possibilities

Multiplexes and ADUs

Compare a conversion or new multiplex with a separate home in the rear yard. The site, your priorities and the budget guide the choice.

Architectural concept: a three-storey terracotta brick infill building with a rounded corner and warm windows at dusk

Matching massing · illustrative

The opportunity

Multiplex conversions and new builds

Create homes for rental income, family or a long-term development plan. Compare what can be retained with what a new building could unlock.

What we check first

Lot width and depth · Unit layout and access · Existing structure and servicing

Concept imagery · Property-specific permissions require review
Explore scale and fitOptional interactive study
A closer look

Compare building dimensions

Explore a sample ADU or multiplex. These simplified controls are a design demonstration; a live property report checks the actual site records.

48 Euclid Ave · laneway suite · simplified rules

    02 / The report

    What the property report includes

    1. 01Lot dimensions and zoningFrontage, depth, area, zoning and lane.
    2. 02A study modelAvailable mapped geometry and illustrative potential, with missing information identified.
    3. 03Development optionsMultiplex and ADU directions, with the questions each option raises.
    4. 04Planning contextMapped rules and constraints that require professional confirmation.
    5. 05Rules and nearby recordsPublic records and source status.
    6. 06Questions and next stepsEvidence, uncertainties and the next review.

    City of Toronto mapped parcel, building and zoning records · cited rules and nearby context

    Preliminary. Not a survey or a zoning certificate. A professional review identifies what still needs verification.

    View an original sample report ↗
    Original Office A3E sample report: overview
    PROPERTY POTENTIALOFFICE A3E
    Preliminary report · Oct 2026
    48 Euclid
    Avenue
    Best option4 homes + garden suite
    Fit86 / 100
    Trinity–Bellwoods01
    Original Office A3E sample report: existing
    DEVELOPMENT OPTIONS48 EUCLID
    Three ways
    to build
    4-plex + garden suite86
    5 homes · ~264 m² · preferred
    Laneway suite only68
    2 homes · lower cost
    4-unit multiplex78
    4 homes · no ADU
    Fit: design, feasibility and value04
    Original Office A3E sample report: potential
    SITE FACTS48 EUCLID
    What we know,
    what to verify
    Lot7.6 × 36.5 mParcel
    ZoningRM (d1.0)569-2013
    LanePublic, rearCity
    Existing floor area~186 m²Verify
    TreesLikely, rearVerify
    Preliminary · not a zoning review07
    Overview · original reportDownload PDF
    99-Park-Home-Avenue_Sample-Report.pdf
    2.4 MB
    CoverOptionsSite factsDownload

    Optional services

    Professional report add-ons

    Request professional advice, a Floor Plan & Massing Study, a financial model, or a construction estimate using your property report. Each service has an agreed scope and fee.

    Compare services Scope and fees
    01 / Review the evidence

    Professional Property Review

    A desktop evidence review, preliminary written opinion, verification priorities, a 30-minute discussion and one clarification round.

    OutcomeA clearer property decision and the questions to resolve next.

    $780 CAD + HST

    02 / Test space and form

    Floor Plan & Massing Study

    One property, preliminary plans and a massing alternative, with one review and one revision.

    OutcomeStudy plans and a massing comparison to test the project brief.

    From $2,500 CAD + HST

    03 / Compare the numbers

    Financial Scenario Model

    One defined scheme, an editable financial model and base, upside and downside comparisons.

    OutcomeA scenario model that makes the financial assumptions visible.

    From $950 CAD + HST

    04 / Estimate construction costs

    Construction Estimate

    A cost breakdown for your defined project, with allowances, contingencies and clearly stated assumptions, based on the drawings and scope available.

    OutcomeA clearer construction budget and the items to confirm with contractors.

    Fee confirmed by written proposal + HST

    05 / Plan the project

    Project services by phase

    Commission design, approvals, technical documentation, construction coordination or handover by agreed phase.

    Scope and fee agreed by phase

    The free report remains available on its own. Paid add-ons begin after inputs, scope, fee and timing are agreed.

    03 / Project services

    Project services

    Build your project around clear phases and outcomes. Commission one phase or a coordinated scope, with the responsibilities, deliverables, fee and timing agreed before work begins.

    Phase 01 / Feasibility & brief

    Feasibility and project brief

    Bring together the site evidence, your priorities and a planning budget. Agree the project brief, the preferred direction and the investigations needed before design progresses.

    Outcome: an agreed brief, a preferred direction and a verification plan.

    Project scope, fee and timing agreed by phase

    Construction phases & outcomes

    Phases and deliverables

    Join at the phase you need. The agreed scope defines our role, the work to deliver and the decisions needed to move forward.

    1. 01Feasibility & briefAn agreed brief, preferred direction and verification priorities.
    2. 02Concept & schematic designStudy layouts, massing and a design direction to develop.
    3. 03Design development & approvalsCoordinated design and the agreed submission package for authority review.
    4. 04Technical design & tenderAgreed technical documentation, coordinated inputs and a basis for contractor pricing.
    5. 05ConstructionDocumented site reviews, design responses and change decisions within the agreed scope.
    6. 06Handover & closeoutA closeout record, outstanding-item list and agreed handover information.

    Free membership keeps reports and budgets together in My Properties.

    04 / Who we are

    About Office A3E

    Our mission: more well-designed homes on Toronto lots, delivered end to end.

    Office A3E designs, builds, owns and operates multiplexes and ADUs across the GTA. We work with owners and investors who want a thoughtful design and one team from first study to finished homes.

    • DesignEvery project starts as a study model, tested against the rules and what gets approved nearby.
    • BuildYears of practice in construction. We price and manage the work.
    • OwnWe own and operate properties across the GTA, so we design for what tenants and buyers pay for.
    • End to endCheck, budget, design, approvals, construction, and leasing or sale.
    The people behind Office A3E

    Meet the founders

    We founded Office A3E to connect property research, architectural design and construction delivery.

    Our experience designing, building, owning and operating homes informs how we assess a site and develop a project.

    01 · Co-founder

    Amy Garritano

    Project delivery & client strategy

    Amy brings more than a decade of design and project management experience across commercial, retail, hospitality and workplace projects. Her background includes Turner Fleischer, WeWork and Sweat & Tonic.

    With a Bachelor of Architectural Studies from the University of Waterloo, she connects design intent with budgets, coordination and the decisions that keep a project moving.

    02 · Co-founder

    Adamo Garritano

    Architecture & design direction

    Adamo is an architect whose experience includes Renzo Piano Building Workshop and SHoP Architects in New York, alongside the construction perspective of his family’s firm, Garritano Brothers.

    He brings careful architectural thinking to the everyday realities of building: context, proportion, materials and how a home feels to live in.

    Architectural concept: a restrained pale-brick garden suite with warm windows and planted garden at dusk
    Have a question?

    Discuss your property

    A free 20-minute call with Office A3E. No brief needed.

    Your free A3E account

    Good properties deserve
    a place in your plans.

    Save your reports. Build a budget. Keep notes and upload your documents. When you are ready, add a study or schedule a call—all from the same property.

    No credit card · Your own account · Personal property workspace

    01 / Saved property reports02 / Budgets, notes & uploads03 / Add-on studies & calls
    Questions

    Good to know

    What will I learn from the free property check?

    Lot size and zoning from City records, which options look possible (multiplex, garden suite or laneway suite), an existing and proposed study model, and the questions that need a closer look.

    What's the difference between a garden suite, laneway suite and multiplex?

    A multiplex contains multiple homes within the main building. A garden suite is a separate home in the rear yard; a laneway suite sits on a lot with lane access. The applicable zoning, dimensions and access conditions need to be checked for each property.

    Is the model showing what I'm allowed to build?

    No. It shows a preliminary envelope from mapped data. It is not a zoning certificate or the City's preliminary zoning review.

    Can I check a property before I buy it?

    Yes. A free screen helps identify the questions to investigate. A professional review can help you understand the property before a purchase decision; timing and scope are agreed with us.

    Do I need a survey or drawings to start?

    No. An address is enough for the free check. A survey comes later, before design.

    Office A3E
    Tools & contact
    Project types
    Learn
    Property guides on officea3e.com ↗
    © 2026 Realist × Office A3E · Toronto, Canada.Automated reports are preliminary and not a zoning certificate. Live reports use the Office A3E engine. Map and design demos use sample data.
    Toronto property screener

    See what’s possible
    with your property.

    Start with an address. Open its visual screener, then explore the detailed report.

    Explore a sample property

    Budget calculator

    Planning budget

    Move a setting and the budget updates. Toronto, in Canadian dollars. Planning allowances, not a quote. No address or sign-up needed to explore. Save a scenario to a property when you are ready.

    Your project

    Financing

    Optional add-ons

    Turn your budget into a defined study.

    Choose the study that answers your next question. Compare the scope and fees upfront, then confirm a fixed fee for your property.

    Financial Scenario Model

    One defined scheme, an editable financial model and base, upside and downside comparisons.

    From $950 CAD + HST

    Floor Plan & Massing Study

    One property, preliminary plans and a massing alternative, with one review and one revision.

    From $2,500 CAD + HST
    Project type

    Garden and laneway suites

    A separate home in the rear yard or on a lane. Garden and laneway suites can add space for family or rental income while retaining the main house.

    • Laneway suites need a lot that backs onto a public lane. Garden suites need a deep enough rear yard.
    • Up to two storeys when the suite is far enough from the house; lower when it sits closer.
    • Its own entrance and address. Emergency access and servicing are checked early.

    Preliminary overview · parcel records and professional review guide the next decision

    Buff brick laneway suite
    Cream brick garden suite
    Stepped laneway suite
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