Commercial Tenant Fit-Out Cost in the GTA: What Actually Drives the Number

Two tenants sign leases on the same floor plate, in the same building, in the same month. One fit-out prices at a number the tenant expected; the other comes back forty percent higher. Nothing about the square footage explains it. The difference sits in turnover condition, allowance structure, access, and whether the building is running around the work.

Commercial tenant fit-out — often called TI, tenant improvement, or simply the fit-out — is the work that turns a leased area into the space a business actually operates from. Partitions, ceilings, doors, finishes, coordinated mechanical and electrical, and the closeout that gets an occupancy date. This article sets out what genuinely drives the number across Toronto, Mississauga and the wider GTA, written from the perspective of a commercial general contractor that handles framing, drywall and ceilings.

It is guidance on cost drivers, not a price list. Every building, lease and municipality behaves slightly differently, and nothing here replaces reading your own lease and the landlord's tenant improvement manual.

Why two quotes for the same area differ so much

The single most common cause of a surprise is that the two tenders were not pricing the same job. Square footage is the easiest number to compare and the least informative. A quote is really a description of a condition, a scope boundary, and a set of constraints. When any of those three is assumed rather than stated, the number moves.

The questions that usually account for the gap:

• What is being handed over? A fully demised suite with ceilings, lighting and washrooms in place is a different starting point from a bare shell.
• What does the landlord supply and what falls to the tenant? Base-building HVAC distribution, sprinkler heads, life safety devices and corridor tie-ins sit on one side or the other depending on the lease.
• Is the tenant's own equipment, furniture or specialty gear inside or outside the contract?
• Does the building let a crew work during the day?
• Are there long-lead items that dictate the schedule rather than follow it?

Two contractors can both be honest and still land far apart, simply because one carried after-hours labour and landlord-mandated protection and the other did not. Comparing tenders means comparing assumptions first.

Turnover condition is the biggest single variable

Turnover condition describes what the space looks like on the day the keys arrive. It is the foundation of the estimate, and it ranges enormously.

Second-generation space with the last tenant still in it. Somebody else's layout is in the way. Before framing starts there is a strip-out: partitions, ceilings, flooring, abandoned cabling and millwork. That is interior demolition, and it carries its own labour, bins, haul-off and disposal. It also carries risk, because the older the building the more likely something in it was installed before current material rules.

Second-generation space already cleared. Better, but "cleared" is not "clean." Patched slabs, previous demising walls that stop short of the deck, ceiling grid modified three tenancies ago and re-used lighting all need assessing rather than assuming.

Cold shell or grey shell. No ceilings, no distribution, sometimes no washrooms and no finished slab. That is not fit-out at all — that is interior build-out, and it is a materially larger scope with more coordination and a longer programme.

Getting turnover condition wrong is the single most expensive assumption in this trade. A good walk-through before the number is issued is worth far more than a clever spreadsheet.

Allowance, base scope and tenant extras are three different budgets

Landlords frequently contribute a tenant improvement allowance. Tenants frequently read that allowance as the project budget. They are rarely the same thing, and the confusion causes more trouble than any construction issue.

Three buckets are worth tracking separately from day one:

1. What the allowance covers. Usually the base-building-standard items: standard partitions, standard ceiling and lighting, standard doors and hardware, standard finishes.
2. What the lease obliges the tenant to build regardless. Demising walls, life safety compliance, and any make-good obligation at the end of the term.
3. Tenant extras. Glass fronts, acoustic upgrades, feature ceilings, custom millwork, upgraded flooring, specialty lighting, IT and AV infrastructure, security, branded elements.

The third bucket is where budgets go. Nothing about it is unreasonable — a business has every right to build the space it wants — but it should be priced as a visible line, not absorbed silently until a number arrives that nobody planned for. Allowances are also typically paid on completion against documentation, which is a cash-flow question as much as a cost question.

Tower elevator access versus grade and dock access

This is the driver most people underestimate, and it is entirely about labour hours rather than materials.

In a downtown Toronto office tower, every sheet of board, every stud, every bin of debris moves through a booked freight elevator, along protected corridors, through a loading bay with a time slot, and often outside business hours. Two people can spend most of a shift moving material rather than installing it. Add lobby and corridor protection, a hoist booking that somebody else can take, and a dock window that closes at a fixed hour, and the cost of simply getting things in and out becomes a substantial part of the tender.

In Mississauga industrial-office along Dixie or Courtneypark, or in a single-storey Halton or Peel plaza, the crew has a grade door or a dock. Material comes off the truck and lands near where it is installed, and a bin sits outside the unit. Same drawings, same finishes, noticeably different labour.

This is why the same fit-out prices differently in commercial interior fit-out in Toronto and commercial interior fit-out in Mississauga. It is not a market difference. It is the building.

Occupied versus vacant

A vacant suite is a production problem: how fast can the crew work and how quickly can material move. An occupied or partly occupied environment is a containment problem layered on top of a production problem.

Working around people means hoarding and protection before anything is cut, dust and noise held at a boundary, fire routes and exits kept usable at all times, and the disruptive stages pushed into hours the building will release. Each of those is real labour. Phased delivery also means mobilising more than once, re-protecting, and cleaning down repeatedly.

A tenant expanding into the adjacent suite while their existing staff keep working is a very different contract from one taking possession of an empty floor, even at identical square footage. Settle that condition in the scope before pricing, never afterwards.

Millwork, equipment and inspection windows set the schedule

Some parts of a fit-out cannot be accelerated by adding people.

Custom millwork — reception desks, feature casework, purpose-built counters — is fabricated off site to a lead time. Specialty glass and doors behave the same way. Certain equipment arrives when the supplier ships it. If any of those items is on the critical path and ordered late, the site waits, and waiting is cost even when nobody is swinging a hammer.

Inspections behave similarly. Municipal and base-building inspections happen in windows, not on demand. A framing or above-ceiling inspection that slips by a few days can push every following trade. On a lease with a fixed commencement date, that slip is felt in rent as well as in construction.

The practical response is to identify long-lead items and inspection hold points at the start, order early, and sequence the rest of the work around them rather than discovering the conflict in week six.

Landlord TI rules are scope, not paperwork

On most multi-tenant properties the landlord's tenant improvement manual governs more of how the work is done than the architectural drawings do. Approved hoarding details, elevator and dock booking, noisy-work restrictions, insurance and documentation requirements, base-building shutdown procedures, and which contractors may touch fire alarm or sprinkler systems all come from that document.

None of it is optional, and all of it costs time. A tender priced without reading the TI manual will under-carry protection, after-hours supervision and landlord coordination — and those gaps surface later as change orders. Ask for the manual before pricing, not after award.

Build-out versus fit-out for a shell

Language matters here because it changes the budget category. If the space has no ceilings, no distribution and no washrooms, the project is a build-out: base systems get installed before any of the fit-out work makes sense. If the base is already there and the job is layout, finishes and coordination, it is a fit-out.

Calling a shell project a fit-out sets an expectation that cannot be met. Read interior fit-out and place the project honestly before anyone attaches a number to it. Mechanical and electrical are coordinated by the general contractor working with the licensed trades; the partitions, ceilings and drywall are what we handle through drywall and steel stud framing.

Sequencing with demolition and abatement

When a fit-out follows an existing tenancy, the order of operations is fixed and it sits ahead of everything else.

The designated substances survey is read first. If the survey identifies material that must be removed, that removal happens before the strip-out proceeds — not alongside it, not after framing has started. In older GTA commercial stock this is routine rather than exceptional, and it is why asbestos abatement belongs in the programme conversation from the beginning.

Running survey, abatement, interior demolition and fit-out under one general contractor removes the handoffs where schedules usually break. When each stage is a separate company, the gaps between them become the tenant's problem and the tenant's cost.

Getting to a reliable number

The fastest route to a fit-out price that holds is to give the contractor the facts that actually move it: drawings or a written scope, turnover condition, the lease allowance and what it covers, the landlord's TI manual, whether the space and its neighbours are occupied, the loading and elevator arrangements, the required occupancy date, and any survey already carried out.

Sofisa is a commercial general contractor working across Toronto, Mississauga and the GTA. We respond to fit-out enquiries, and on most projects we walk the space before the number is issued. Call (647) 963-4310 or get in touch with the scope and we will tell you what we would need to price it properly.

More on the trades and areas behind this work: interior fit-out, our Mississauga page and our Toronto page.