# Feasibility Assessment Toronto | Multiplex Toronto Builders

URL: https://multiplextorontobuilders.ca/multiplex-feasibility-assessment/

![Typical Toronto residential lot with an older detached house and deep backyard](/images/misc/wide-view-of-a-typical-toronto-residential-lot-wit.webp)

Design \* Build \* Deliver - Feasibility Assessment

# Multiplex Feasibility Assessment in Toronto, ON | For Owners Before Buying or Designing

Last updated: October 21, 2026

A written report in 1-2 weeks: GeoWarehouse zoning pull, unit-count test, servicing check, heritage and tree screen and a CAD budget range, before you buy, design or pay a deposit.

Price band (CAD)

$1,500-$4,500

Timeline

1-2 weeks

Built for

Owners Before Buying or Designing

-   Written Report in 1-2 Weeks
-   GeoWarehouse Zoning Pull
-   Honest Unit Count
-   CAD Budget Range
-   15 Years Toronto

## Request Written Feasibility

Zoning check + CAD estimate before any deposit.

Thanks, we got your project details.

We reply within one business day to book your feasibility review.

-   ★5-Star Multiplex Construction Rating
-   ◆15+ Years of Toronto Infill Construction Experience
-   ◆40+ multiplex projects coordinated
-   ◆Free in-home feasibility with written zoning verification

Multiplex Toronto Builders

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 prepares written multiplex feasibility assessments for owners and buyers across Toronto, East York, Scarborough, Etobicoke, North York and the GTA. In 1-2 weeks you get a GeoWarehouse zoning pull, a unit-count test against setbacks, height and coverage, a heritage, tree, ravine and servicing screen and a CAD budget range. The builds that follow run under HCRA registration with Tarion enrolment per project, WSIB and a $5M CGL policy. Every recommendation is grounded in the Ontario Building Code and the zoning by-law, with input on what the Toronto Committee of Adjustment, Toronto Building, Toronto Water and Toronto Hydro will need later.

Feasibility exists because the expensive mistakes happen early. Owners buy a lot on a sixplex promise where only a fourplex is as-of-right, confuse severance with multiplex approval, assume EHON math works on a 25-foot lot or plan on no parking without a CoA filing. We test OBC Part 9 against Part 3 by unit count and height, note where insulated glazing and 316 stainless fasteners within 500 metres of the lake affect cost, and verify zoning through GeoWarehouse before you commit.

A written report costs **$1,500-$4,500 CAD** and takes 1-2 weeks. We assess lots in Toronto, East York, Scarborough, Etobicoke, North York, York, Vaughan, Markham, Richmond Hill, Mississauga, Brampton and Pickering.

![Feasibility report pages with a zoning envelope diagram and budget table on a desk beside a site survey](/images/content/multiplex-feasibility-report-pages-with-a-zoning-e.webp)

This is the first step for every service we offer, from 

multiplex construction

[/multiplex-construction/ →](/multiplex-construction/)

 to 

architectural design

[/multiplex-architectural-design/ →](/multiplex-architectural-design/)

. Want to self-screen first? Try 

does your lot qualify for a multiplex

[/guide/does-my-lot-qualify-for-a-multiplex/ →](/guide/does-my-lot-qualify-for-a-multiplex/)

.

## What the Feasibility Assessment Covers

### GeoWarehouse Zoning Pull

We start with parcel data from GeoWarehouse: lot dimensions, ownership and the zoning that applies. Then we read your zone under By-law 569-2013 as amended by EHON, or the local GTA by-law, and confirm which district your lot falls in. That last step matters most for sixplexes, which are permitted only in the Toronto and East York District and Scarborough Ward 23 North. Owners are often surprised how much a district boundary changes the answer.

### Unit-Count Test (Setbacks, Height, Coverage)

Permission is not the same as fit. We model the buildable envelope on your lot: front, rear and side setbacks, the height limit, lot coverage, soft landscaping and parking. Then we test how many legal, rentable units fit inside it. For many lots we show more than one option, such as a triplex with no variance against a fourplex with a side-yard variance, with the time and cost difference between them.

### Servicing Check (Toronto Water, Toronto Hydro)

Older houses often have a small or lead water line and an electrical service sized for one family. Three or four units usually need a larger Toronto Water lateral, often 25mm or 38mm, and a Toronto Hydro service upgrade with a meter bank. We check what exists, flag what will likely need upgrading and include it in the budget, because utility lead times often set the occupancy date.

### Heritage and Tree Screen

We check the Toronto Heritage Register for listing or designation, and screen for protected trees that Urban Forestry will want preserved. Lots near ravines may fall under Ravine and Natural Feature Protection or a TRCA regulated area, which can limit where you can build. Each of these can shrink a footprint or add review time, so they belong in the report, not in a surprise examiner comment.

### CAD Budget Range

Finally, we price each option using our published bands: $320-$520 per sqft for new builds, $220-$380 per sqft for conversions, plus soft costs for design, permits and any development charges. The result is a budget range you can take to a lender, a partner or your own spreadsheet. If you build with us, the fixed price follows from this report.

## Common Multiplex Feasibility Problems in Toronto

### Bought a Lot on a Sixplex Promise

**Symptom:** You bought a lot because the listing or a builder said six units were allowed, and now the design is stuck. **Immediate action:** Get the district confirmed in writing for your exact parcel. **Scope:** Six units are permitted only in the Toronto and East York District and Scarborough Ward 23 North. Everywhere else the as-of-right maximum is four. A variance to six units outside those areas is slow and uncertain. **Qualified contractor response:** We confirm the district, then model the best fourplex for your lot and check whether a garden suite adds a fifth unit legally. It is not the answer you hoped for, but it gets your project moving with real numbers.

### Ravine or TRCA Regulated Area Found After Design

**Symptom:** Your drawings are done, and the permit is held because part of the lot falls in a regulated area. **Immediate action:** Ask the city or conservation authority to confirm the regulated limit on your lot. **Scope:** Ravine and natural feature protection and TRCA regulations can limit where you build, require a permit from the conservation authority and add months. **Qualified contractor response:** We screen for ravine and TRCA limits at feasibility, so the building is placed outside them from the start. When a lot is already caught, we work with the design team to pull the footprint back and prepare the conservation authority submission.

### Water Service Too Small for Four Units

**Symptom:** Near the end of design, Toronto Water says your existing service cannot support four units. **Immediate action:** Get the existing service size and material confirmed. **Scope:** Many older services are 12mm or 19mm, sometimes lead. Four units usually need a larger lateral and a road cut, which needs its own permit and scheduling. **Qualified contractor response:** We check the water service during feasibility and include an upgraded 25mm or 38mm lateral in the budget where likely. The application goes in with the building permit so it is ready before occupancy.

### Heritage Status Discovered After the Purchase

**Symptom:** You bought a house planning to tear it down for a fourplex, then learned it is listed or designated on the Toronto Heritage Register. **Immediate action:** Confirm the exact heritage status and the protected attributes. **Scope:** Designated properties generally cannot be demolished, and listed properties require notice before demolition. Your plan may need to shift from rebuild to conversion, with exterior changes limited by heritage review. **Qualified contractor response:** We check the Heritage Register in every feasibility report, ideally before you buy. If a property you already own is affected, we model a conversion that keeps the street face, adds units through interior reconfiguration and a rear addition, and budgets heritage review time. Many heritage houses make excellent triplexes, as our Riverdale Victorian conversion showed. The key is knowing early, so the plan and the budget start from the right assumptions and you do not pay for drawings of a building you are not allowed to build.

Why Owners Pick Us

## Why Choose Multiplex Toronto Builders for Feasibility Assessment?

Six things we do on every project, written into the scope before you sign anything.

### Answers Before Money Moves

You learn what your lot can legally carry and roughly what it costs before you buy, pay a designer or sign with a builder.

### Real Zoning, Not Guesses

We pull your parcel through GeoWarehouse and check it against By-law 569-2013 or the local by-law, including the exact sixplex district boundaries.

### The Hidden Constraints Too

Heritage Register status, protected trees, ravine and TRCA regulated areas, lane access and Toronto Water capacity, all screened in one report.

### An Honest Unit Count

If your lot fits three units and not four, we say so and show why. Owners tell us that alone saved them a five-figure mistake.

### Budget You Can Take to a Lender

A CAD budget range built from our published per-sqft bands and your specific conditions, laid out so a lender or partner can follow it.

### Yours to Keep

The report is yours whether or not you build with us. If you do, ask about crediting the fee toward design-build when you book.

Execution Roadmap

## How Does Feasibility Assessment Work With Us?

Four steps from the first zoning check to keys. Typical timeline: 1-2 weeks.

1.  1
    
    ### Step 1: Book & Share the Address
    
    Send the address or intersection, the current house and your goals. If you are buying, send the listing.
    
2.  2
    
    ### Step 2: Zoning Pull & Site Screen
    
    GeoWarehouse parcel data, By-law 569-2013 permissions, heritage, trees, ravines, lane access and servicing.
    
3.  3
    
    ### Step 3: Unit-Count Test & Budget
    
    Setback, height and coverage model, one or more unit-count options and a CAD budget range for each.
    
4.  4
    
    ### Step 4: Written Report & Review Call
    
    A written report in 1-2 weeks and a call to walk through it, with clear next steps.
    

Published CAD Pricing

## How Much Does a Multiplex Feasibility Assessment Cost?

A written multiplex feasibility assessment costs **$1,500 to $4,500 CAD** and takes **1-2 weeks**. The fee depends on:

-   **Lot complexity:** a standard lot costs less to assess than a corner, ravine or heritage lot
-   **Number of options:** testing triplex, fourplex and fourplex plus garden suite takes more modelling than one option
-   **Existing house:** a conversion assessment includes a walk-through of the foundation, basement height and services
-   **Location:** GTA cities outside Toronto need their own by-law review

Compare that with a design deposit of $15K-$60K, or a land purchase made on a unit count the zoning does not allow. The feasibility report is the cheapest part of a multiplex project and the one that protects every other dollar.

| Unit Type | Price (CAD) | Project | Timeline |
| --- | --- | --- | --- |
| Triplex New Build | $400K-$1.1M | 3 units, Part 9 | 8-10 months |
| Fourplex New Build | $500K-$1.4M | 4 units, as-of-right citywide | 9-12 months |
| Sixplex (Approved Zones) | $800K-$2M | 6 units, Part 3 likely | 12-16 months |
| House-to-Multiplex Conversion | $250K-$900K | 2-4 units in existing house | 6-9 months |
| Architectural Design (Stamped) | $15K-$60K | Permit drawing set | 6-10 weeks |
| Permit Coordination | $5K-$18K | Toronto Building + CoA | 9-14 weeks |
| Feasibility Assessment | $1,500-$4,500 | Written zoning + budget report | 1-2 weeks |

Priced per written feasibility report.

Straight Answer

## Why Pay for Feasibility When Some Builders Quote Free?

A free quote is a sales tool. In our opinion, it is usually built backwards: the builder starts from the unit count that wins the job, then works out the details later.

A paid feasibility assessment is built forwards. We start from your parcel's zoning, the setbacks, the trees, the servicing and the heritage status, and work out what can legally be built. Sometimes that is good news, sometimes it is not. Either way, you get it in writing, from someone with no incentive to oversell.

Owners who skip this step are the ones we meet later with sixplex drawings for a fourplex lot, or a basement unit that cannot reach legal ceiling height. A few thousand dollars up front is a small price for knowing the real answer.

Our Work

## Feasibility Assessment Project Photos

Finished exteriors, interiors and site stages from Toronto and GTA projects. Click any photo to enlarge.

 

![](data:image/gif;base64,R0lGODlhAQABAAAAACw=)

Client Feedback

## What Owners Say About Our Feasibility Assessment

> "Paid for the feasibility first and I'm glad we did. Our Unionville lot works for a main house plus additional unit for grandparents, and we knew the budget range before talking to the bank."

Kevin C., Unionville Feasibility $3,200

> "Good honest feasibility on our Bay Ridges lot. They told us two units, not three, and showed why. Rather hear that now than after paying an architect."

Natalie B., Bay Ridges Feasibility $2,400

> "We had a conditional offer on a house in Lansing and two weeks to decide. The report came back in nine days with a fourplex option and a cost range. We firmed up the deal with confidence."

Omar F., Lansing Pre-purchase feasibility

Guides

## Feasibility Assessment Guides

Plain-language answers to the questions owners ask before they commit. Each guide links back here when you are ready for numbers.

Does Your Lot Qualify for a Multiplex? A Toronto Lot ChecklistExplainer

[/guide/does-my-lot-qualify-for-a-multiplex/ →](/guide/does-my-lot-qualify-for-a-multiplex/)

Trees, Ravines and Servicing: Site Constraints That Stall MultiplexesExplainer

[/guide/multiplex-site-constraints-trees-ravines-servicing/ →](/guide/multiplex-site-constraints-trees-ravines-servicing/)

Browse all multiplex guides

[/guide/ →](/guide/)

Toronto Zoning FAQs

## Feasibility Assessment FAQs

### What does a multiplex feasibility assessment include?

A GeoWarehouse zoning pull, a check against By-law 569-2013 or the local by-law, a setback and unit-count test, a heritage, tree, ravine and servicing screen, and a CAD budget range, all in a written report.

### How much does a feasibility assessment cost?

Between $1,500 and $4,500 CAD, depending on lot complexity, how many options we test and whether we assess an existing house for conversion.

### How long does the report take?

Usually 1-2 weeks from booking. If you are on a conditional offer deadline, tell us when you book and we will plan around it where we can.

### Can you assess a lot before I buy it?

Yes, and it is one of the best times to do it. Send us the listing and we will tell you what the lot can legally carry before you firm up the purchase.

### Do you assess lots outside Toronto?

Yes, across the GTA. EHON does not apply outside the City of Toronto, so we check each city's own additional residential unit or secondary suite rules.

### What if my lot cannot fit four units?

We show you what it can fit, whether that is a triplex, a house plus garden suite or a conversion, and the budget for each. An honest smaller answer is still worth having.

### Do you check heritage and trees?

Yes. Heritage Register status, protected trees under Urban Forestry, ravine and natural feature protection and TRCA regulated areas are all part of the screen.

### Is the fee credited if I build with you?

Ask when you book. We often credit the feasibility fee toward a design-build contract, and we confirm the terms in writing at the start.

Related Services

## Related Multiplex Services

### Multiplex Construction

Ground-up triplex, fourplex and approved-zone sixplex builds on Toronto infill lots, scoped to OBC Part 9 or Part 3 by unit count and height.

$400K-$2M

View multiplex construction

[Multiplex Construction →](/multiplex-construction/)

### Design-Build

Feasibility, stamped design, permits and construction under one contract and one PM, priced as it is drawn and fixed after feasibility.

$50K-$150K

View design-build

[Design-Build →](/multiplex-design-build/)

### Architectural Design

Concept, zoning review, BCIN or OAA stamped permit drawings, structural and MEP coordination and SB-12 energy compliance.

$15K-$60K

View architectural design

[Architectural Design →](/multiplex-architectural-design/)

### Building Permits

Zoning certificates, permit applications, CoA minor variances with hearing representation, utility and right-of-way permits, and inspections.

$5,000-$18K

View building permits

[Building Permits →](/multiplex-building-permits/)

![](/images/misc/finished-brick-and-oak-toronto-multiplex-exterior-.webp)

Start With Certainty

## Get a Fixed Number for Your Feasibility Assessment

Send us your address and we come back with a zoning read, an honest unit count and a CAD budget range in writing, before you spend on drawings.

Get a Written Feasibility Assessment

[/contact/ →](/contact/)

 

See All Services

[/services/ →](/services/)

-   Written zoning verification
-   CAD price bands before deposit
-   Licensed Ontario Builder, Insured & Bonded