# Multiplex Guides | Multiplex Toronto Builders URL: https://multiplextorontobuilders.ca/guide/ ![Row of finished brick multiplexes on a tree-lined Toronto street](/images/hero/row-of-finished-brick-multiplexes-on-a-tree-lined-.webp) Multiplex Guides # Toronto Multiplex Guides: Zoning, Costs, Permits and Design Plain-language answers from the Multiplex Toronto Builders Crew on EHON zoning, sixplex areas, unit counts, conversions, permits and costs in CAD. Each guide links to the service it supports, so you can move from learning to numbers when you are ready. ## Multiplex Construction View the multiplex construction service [/multiplex-construction/ →](/multiplex-construction/) ![Construction crew standing at a distance in front of a framed Toronto fourplex](/images/featured/wide-shot-of-a-construction-crew-group-standing-at.webp) Decision guide ### Hiring a Multiplex Builder in Ontario: HCRA, Tarion and Contract Red Flags A vetting checklist for Ontario owners: HCRA registration, Tarion enrolment per project, WSIB and insurance, contract red flags and the questions to ask before you pay a deposit. [Hiring a Multiplex Builder in Ontario: HCRA, Tarion and Contract Red Flags →](/guide/hiring-a-multiplex-builder-ontario/) ![Fourplex under construction with framed upper floors on a Toronto infill lot](/images/featured/fourplex-under-construction-with-framed-upper-floo.webp) Explainer ### How Long Does It Take to Build a Multiplex? Timelines by Unit Count Realistic feasibility-to-occupancy timelines for Toronto triplexes, fourplexes, sixplexes and conversions, plus the things that slow schedules down. [How Long Does It Take to Build a Multiplex? Timelines by Unit Count →](/guide/how-long-to-build-a-multiplex/) ![Finished multiplex interior with wide-plank oak floor and casement windows](/images/featured/finished-multiplex-interior-with-wide-plank-oak-fl.webp) Decision guide ### How Much Does It Cost to Build a Multiplex in Ontario? Per-square-foot ranges for new multiplex builds and conversions in Ontario, the soft costs that sit outside them, and the factors that move a quote up or down. [How Much Does It Cost to Build a Multiplex in Ontario? →](/guide/multiplex-construction-cost-ontario/) ![Newly completed Toronto fourplex exterior ready for occupancy](/images/featured/newly-completed-toronto-fourplex-exterior-ready-fo.webp) Decision guide ### Multiplex Construction Financing in Ontario: Loans, Draws and Equity How Ontario owners fund a multiplex build before rents start: construction loans, milestone draws, home equity, completion appraisals and why a fixed price helps lender approval. [Multiplex Construction Financing in Ontario: Loans, Draws and Equity →](/guide/multiplex-construction-financing-ontario/) ![Three finished Toronto infill multiplexes of different sizes side by side](/images/featured/three-finished-toronto-infill-multiplexes-of-diffe.webp) Decision guide ### Triplex vs Fourplex vs Sixplex: Which Fits Your Lot and Budget? Compare three, four and six units on price, zoning permission, building code path, lot width and rent potential, so you choose a unit count your lot can legally carry. [Triplex vs Fourplex vs Sixplex: Which Fits Your Lot and Budget? →](/guide/triplex-vs-fourplex-vs-sixplex/) ![Row of finished brick fourplexes on a tree-lined Toronto residential street](/images/featured/row-of-finished-brick-fourplexes-on-a-tree-lined-t.webp) Explainer ### What Is EHON? Toronto's Multiplex Zoning Rules Explained What Expanding Housing Options in Neighbourhoods allows under By-law 569-2013, where sixplexes are permitted, and why permission is not the same as fit on your lot. [What Is EHON? Toronto's Multiplex Zoning Rules Explained →](/guide/what-is-ehon-toronto-multiplex-zoning/) ## Fourplex Construction View the fourplex construction service [/fourplex-construction/ →](/fourplex-construction/) ![Corner-lot fourplex in Toronto with entrances on both streets](/images/featured/corner-lot-fourplex-in-toronto-with-entrances-on-b.webp) Explainer ### Building a Fourplex on a Corner Lot: Double Frontage Rules How two street frontages change a Toronto fourplex: flankage setbacks, the sight triangle, separate entrances on the side street and the design upside of a corner lot. [Building a Fourplex on a Corner Lot: Double Frontage Rules →](/guide/fourplex-corner-lot-double-frontage/) ![Narrow finished fourplex on a 25-foot Toronto lot between older semis](/images/featured/narrow-finished-fourplex-on-a-25-foot-toronto-lot-.webp) Explainer ### Can You Build a Fourplex on a 25-Foot Lot in Toronto? Why many 25-foot Toronto lots fit two or three units without a variance, how the setback math works on a 25x120 lot, and when a side-yard variance makes four units worth it. [Can You Build a Fourplex on a 25-Foot Lot in Toronto? →](/guide/fourplex-on-25-foot-lot-toronto/) ![Rear yard view of a Toronto fourplex with a modern detached garden suite behind it](/images/featured/rear-yard-view-of-a-toronto-fourplex-with-a-modern.webp) Explainer ### Fourplex Plus Garden Suite: Building 5 Units on One Toronto Lot How a garden or laneway suite can add a fifth unit behind a Toronto fourplex: rear yard depth, lane access, fire access, servicing and what five units change about financing. [Fourplex Plus Garden Suite: Building 5 Units on One Toronto Lot →](/guide/fourplex-plus-garden-suite/) ![Bright finished two-bedroom fourplex unit living room with oak floor](/images/featured/bright-finished-two-bedroom-fourplex-unit-living-r.webp) Decision guide ### Is a Fourplex a Good Investment in Toronto? Rental Income Math Walk through fourplex profitability before you pay for feasibility: build cost, completed value, your own rent assumptions, vacancy, operating costs and financing carry. [Is a Fourplex a Good Investment in Toronto? Rental Income Math →](/guide/is-a-fourplex-a-good-investment-toronto/) ![Stacked fourplex exterior with two levels of balconies on a Toronto street](/images/featured/stacked-fourplex-exterior-with-two-levels-of-balco.webp) Decision guide ### Stacked vs Side-by-Side Fourplex Layouts Compare stacked and side-by-side fourplex layouts on lot width, stairs and egress, fire and sound separation, unit size, rentability and construction cost. [Stacked vs Side-by-Side Fourplex Layouts →](/guide/stacked-vs-side-by-side-fourplex/) ![Excavated Toronto infill lot with poured foundation walls between houses](/images/featured/excavated-toronto-infill-lot-with-poured-foundatio.webp) Decision guide ### What to Expect During Fourplex Construction, Demolition to Occupancy Each site phase of a Toronto fourplex build, from demolition and excavation through foundation, framing, MEP rough-in, inspections, occupancy and the Tarion pre-delivery inspection. [What to Expect During Fourplex Construction, Demolition to Occupancy →](/guide/fourplex-construction-what-to-expect/) ## Multiplex Conversion View the multiplex conversion service [/multiplex-conversion/ →](/multiplex-conversion/) ![Restored Riverdale Victorian brick house facade with original gable trim](/images/featured/restored-riverdale-victorian-brick-house-facade-wi.webp) Explainer ### Can a Heritage Home Become a Multiplex in Toronto? What Heritage Register listing and designation allow when you convert a Toronto home into a multiplex, how Heritage Preservation Services review works and how to plan around it. [Can a Heritage Home Become a Multiplex in Toronto? →](/guide/heritage-home-multiplex-conversion/) ![Older Toronto bungalow beside a new modern fourplex on the same street](/images/featured/older-toronto-bungalow-beside-a-new-modern-fourple.webp) Decision guide ### Convert or Rebuild? House Conversion vs New Multiplex Build How to decide between converting your existing house and tearing it down for a new multiplex: per-sqft cost, foundation condition, achievable unit count, timeline and heritage limits. [Convert or Rebuild? House Conversion vs New Multiplex Build →](/guide/convert-vs-rebuild-multiplex/) ![Low unfinished Toronto basement with exposed joists and concrete floor](/images/featured/low-unfinished-toronto-basement-with-exposed-joist.webp) Explainer ### Do You Need to Underpin the Basement for a Multiplex Conversion? When basement ceiling height forces underpinning, when bench footings or slab lowering are enough, what semis need for party walls, and how each option affects cost and schedule. [Do You Need to Underpin the Basement for a Multiplex Conversion? →](/guide/underpinning-basement-multiplex-conversion/) ![Ceiling between units with resilient channel and mineral wool insulation installed](/images/featured/ceiling-between-units-with-resilient-channel-and-m.webp) Explainer ### Fire Separation and Soundproofing Between Units in a Converted House The fire and sound assemblies a legal unit needs in an Ontario conversion: 45-minute and 1-hour ratings, Type X drywall, resilient channel, STC 50+, fire doors and interconnected alarms. [Fire Separation and Soundproofing Between Units in a Converted House →](/guide/fire-separation-soundproofing-between-units/) ![Toronto semi-detached brick house mid-conversion with new side entrance framing](/images/featured/toronto-semi-detached-brick-house-mid-conversion-w.webp) Explainer ### How to Convert a House into a Multiplex in Toronto The step-by-step path from an existing Toronto house to legal self-contained units: zoning check, existing-condition survey, design and permit, structural and MEP work, inspections and occupancy. [How to Convert a House into a Multiplex in Toronto →](/guide/how-to-convert-a-house-into-a-multiplex/) ![Bank of new electrical meters on the exterior wall of a converted Toronto house](/images/featured/bank-of-new-electrical-meters-on-the-exterior-wall.webp) Explainer ### Hydro, Water and Meter Upgrades That Stall Multiplex Conversions The utility work that holds up occupancy on conversions: Toronto Hydro service upgrades and meter banks, separate meters per unit, water service upsizing, gas separation and ESA sequencing. [Hydro, Water and Meter Upgrades That Stall Multiplex Conversions →](/guide/multiplex-conversion-utility-upgrades/) ## Sixplex Construction View the sixplex construction service [/sixplex-construction/ →](/sixplex-construction/) ![Energy-efficient sixplex exterior with triple-glazed casement windows](/images/featured/energy-efficient-sixplex-exterior-with-triple-glaz.webp) Decision guide ### CMHC MLI Select for 6-Unit Builds: How Sixplex Owners Qualify How the five-unit financing path a sixplex unlocks works: CMHC MLI Select points for energy, accessibility and affordability, and design choices that earn them early. [CMHC MLI Select for 6-Unit Builds: How Sixplex Owners Qualify →](/guide/cmhc-mli-select-sixplex/) ![Four-storey sixplex exterior with non-combustible cladding on a Toronto street](/images/featured/four-storey-sixplex-exterior-with-non-combustible-.webp) Explainer ### OBC Part 9 vs Part 3: When a Multiplex Triggers the Larger Building Code The Ontario Building Code thresholds that move a multiplex from Part 9 to Part 3, what Part 3 adds in sprinklers, exits and cladding, and how it changes design and cost. [OBC Part 9 vs Part 3: When a Multiplex Triggers the Larger Building Code →](/guide/obc-part-9-vs-part-3-multiplex/) ![Finished fourplex in Etobicoke with brick and oak details](/images/featured/finished-fourplex-in-etobicoke-with-brick-and-oak-.webp) Explainer ### Sixplex Sales Pitch Red Flags: Units Your Zoning May Not Allow How to spot a sixplex pitch your zoning will not support, what happened on an Etobicoke redesign, and the questions to ask before paying for drawings or a deposit. [Sixplex Sales Pitch Red Flags: Units Your Zoning May Not Allow →](/guide/sixplex-zoning-red-flags/) ![Finished six-unit residential building on a Scarborough corner lot](/images/featured/finished-six-unit-residential-building-on-a-scarbo.webp) Explainer ### Where Are Sixplexes Allowed in Toronto? The 2025 Amendment Explained Exactly where six units are permitted in Toronto under the 2025 amendment, why fourplex stays the limit everywhere else, and how to check your own parcel. [Where Are Sixplexes Allowed in Toronto? The 2025 Amendment Explained →](/guide/where-are-sixplexes-allowed-toronto/) ## Triplex Construction View the triplex construction service [/triplex-construction/ →](/triplex-construction/) ![Triplex with an accessible level-entry ground unit and garden](/images/featured/triplex-with-accessible-level-entry-ground-unit-an.webp) Explainer ### Building a Triplex for Multigenerational Living in Toronto How families house parents and adult children on one Toronto lot with a triplex: an accessible ground unit, separate or shared utilities, privacy between units and future rental flexibility. [Building a Triplex for Multigenerational Living in Toronto →](/guide/multigenerational-triplex-toronto/) ![Triplex front elevation with three separate entrances and black railings](/images/featured/triplex-front-elevation-with-three-separate-entran.webp) Explainer ### Triplex Unit Layouts: Basement, Main Floor and Upper Units How three units stack in a Toronto house form: unit sizes per floor, separate entrances and egress, laundry and HVAC per unit, and bedroom-count trade-offs. [Triplex Unit Layouts: Basement, Main Floor and Upper Units →](/guide/triplex-unit-layouts/) ![Modern triplex on a narrow Danforth-area lot with three stacked units](/images/featured/modern-triplex-on-a-narrow-danforth-area-lot-with-.webp) Explainer ### When a Triplex Makes More Sense Than a Fourplex The lot and budget cases where three units beat four: narrow lots and setback limits, lower carrying cost, larger family-size units and avoiding Committee of Adjustment variances. [When a Triplex Makes More Sense Than a Fourplex →](/guide/when-a-triplex-makes-more-sense/) ## Multiplex Additions View the multiplex additions service [/multiplex-additions/ →](/multiplex-additions/) ![Bungalow with a new framed second-storey addition under construction](/images/featured/bungalow-with-a-new-framed-second-storey-addition-.webp) Explainer ### Can Your Foundation Support a Storey Addition? Structural Checks First The engineering review before building up: footing and wall capacity, the engineer's assessment, reinforcement options such as underpinning, helical piers and new footings, and zoning height limits. [Can Your Foundation Support a Storey Addition? Structural Checks First →](/guide/foundation-storey-addition-structural-checks/) ![Two-storey rear addition on a Toronto brick house with large casement windows](/images/featured/two-storey-rear-addition-on-a-toronto-brick-house-.webp) Decision guide ### Rear Addition vs Side Addition: Which Adds a Unit More Easily? Compare rear and side additions for creating or enlarging a unit: setback and lot coverage limits, cost bands, unit access and egress, and how likely each is to need a variance. [Rear Addition vs Side Addition: Which Adds a Unit More Easily? →](/guide/rear-vs-side-addition-multiplex/) ## Design-Build View the design-build service [/multiplex-design-build/ →](/multiplex-design-build/) ![Architectural drawings on a site table inside a framed multiplex](/images/featured/architectural-drawings-spread-on-a-site-table-insi.webp) Decision guide ### Design-Build vs Design-Bid-Build for Multiplex Projects Compare the two main ways to deliver a multiplex on cost certainty, speed and accountability: who holds the risk, change-order exposure, schedule overlap and when hiring separately still makes sense. [Design-Build vs Design-Bid-Build for Multiplex Projects →](/guide/design-build-vs-design-bid-build-multiplex/) ![Finished multiplex kitchen with white cabinets and oak floor](/images/featured/finished-multiplex-kitchen-with-white-cabinets-and.webp) Decision guide ### What to Expect in a Fixed-Price Multiplex Design-Build Contract What a fixed-price multiplex construction contract should cover: scope across structure, envelope, MEP, finishes, landscaping and permits, allowances vs fixed items, deposit and draws, and warranty. [What to Expect in a Fixed-Price Multiplex Design-Build Contract →](/guide/fixed-price-multiplex-design-build-contract/) ## Architectural Design View the architectural design service [/multiplex-architectural-design/ →](/multiplex-architectural-design/) ![Stamped permit drawings for a fourplex laid on a drafting table](/images/featured/stamped-permit-drawings-for-a-fourplex-laid-on-a-d.webp) Decision guide ### Architect vs BCIN Designer for a Toronto Multiplex Who can legally design which multiplex in Ontario: BCIN qualification limits for Part 9 buildings, when an OAA architect is required for Part 3, and how fees and liability compare. [Architect vs BCIN Designer for a Toronto Multiplex →](/guide/architect-vs-bcin-designer-multiplex/) ![Architect's desk with multiplex floor plans and a scale model](/images/featured/architect-desk-with-multiplex-floor-plans-and-scal.webp) Decision guide ### The Multiplex Design Process: From Site Survey to Stamped Drawings Each stage of multiplex design and what you get from it: site survey and zoning review, concept options, design development, the permit set and SB-12 energy compliance, in about 6-10 weeks. [The Multiplex Design Process: From Site Survey to Stamped Drawings →](/guide/multiplex-design-process/) ![Standard-form fourplex on a regular Toronto lot](/images/featured/standard-form-fourplex-on-a-regular-toronto-lot-br.webp) Decision guide ### Toronto Pre-Approved Multiplex Plans vs Custom Design Where city catalogue multiplex plans fit and where they do not: lot setbacks, grading, tree protection conflicts, and the cost and time trade-offs against a custom design. [Toronto Pre-Approved Multiplex Plans vs Custom Design →](/guide/toronto-pre-approved-multiplex-plans-vs-custom/) ## Building Permits View the building permits service [/multiplex-building-permits/ →](/multiplex-building-permits/) ![New Toronto fourplex nearing completion with landscaping in progress](/images/featured/new-toronto-fourplex-nearing-completion-with-lands.webp) Decision guide ### Development Charges and Permit Fees on Toronto Multiplexes The fees added at permit stage on Toronto multiplexes: building permit fees, development charge rules for additional units, what Bill 23 changed and how to model fees in your pro forma. [Development Charges and Permit Fees on Toronto Multiplexes →](/guide/development-charges-permit-fees-toronto-multiplex/) ![Toronto residential street with a new fourplex and a narrow side yard](/images/featured/toronto-residential-street-with-a-new-fourplex-and.webp) Explainer ### Do You Need a Minor Variance? The Committee of Adjustment for Multiplexes When a Toronto multiplex needs Committee of Adjustment approval, the four tests every variance must meet, the district panels, the notice and hearing timeline and a downtown parking variance example. [Do You Need a Minor Variance? The Committee of Adjustment for Multiplexes →](/guide/minor-variance-committee-of-adjustment-multiplex/) ![Building permit card posted in the window of a Toronto multiplex under construction](/images/featured/building-permit-card-posted-in-the-window-of-a-tor.webp) Explainer ### How Long Does a Multiplex Building Permit Take in Toronto? Realistic Toronto multiplex permit timelines: application stages, zoning review, examiner comments and resubmission, the 9-14 week coordination window, variance delays and how to avoid resubmission. [How Long Does a Multiplex Building Permit Take in Toronto? →](/guide/multiplex-building-permit-timeline-toronto/) ## Feasibility Assessment View the feasibility assessment service [/multiplex-feasibility-assessment/ →](/multiplex-feasibility-assessment/) ![Typical Toronto residential lot with an older detached house and deep backyard](/images/featured/wide-view-of-a-typical-toronto-residential-lot-wit.webp) Explainer ### Does Your Lot Qualify for a Multiplex? A Toronto Lot Checklist A self-screening checklist for Toronto owners before booking feasibility: lot width and depth, zone and district, heritage status, lane access, existing structure and when to get a professional check. [Does Your Lot Qualify for a Multiplex? A Toronto Lot Checklist →](/guide/does-my-lot-qualify-for-a-multiplex/) ![Mature tree with protection hoarding beside an infill construction lot](/images/featured/mature-tree-with-protection-hoarding-beside-an-inf.webp) Explainer ### Trees, Ravines and Servicing: Site Constraints That Stall Multiplexes The hidden site issues that stall Toronto multiplexes after design money is spent: Urban Forestry tree protection zones, ravine and TRCA regulated areas, Toronto Water capacity, grading and stormwater. [Trees, Ravines and Servicing: Site Constraints That Stall Multiplexes →](/guide/multiplex-site-constraints-trees-ravines-servicing/) Start With Certainty ## Skip the Reading, Get the Answer for Your Lot Guides explain the rules. A written feasibility report applies them to your address, with a unit count and a CAD budget range in 1-2 weeks. Get a Written Feasibility Assessment [/contact/ →](/contact/) - Written zoning verification - CAD price bands before deposit - Licensed Ontario Builder, Insured & Bonded