The real and hidden cost of leasing an office in Montreal

Research verified: August 23, 2026
Purpose: identify and model the costs between an advertised office price and an operational, exited workspace
Boundary: this is a planning model, not legal, tax, accounting, construction or brokerage advice. Actual allocation depends on the agreement and property.

The cost is a timeline, not a rent line

The most expensive office-pricing error is comparing a flexible office’s monthly service fee with only a conventional lease’s net rent. One number may bundle furniture, internet, utilities and common services; the other may exclude building charges, fit-out, technology, insurance, professional fees and restoration.

Use this identity:

Total occupancy cost
= transaction and diligence
+ design, permits and fit-out
+ furniture, technology and move-in
+ recurring rent, building and service costs
+ change, renewal and unused-capacity costs
+ exit and restoration
- recoverable deposits and agreed credits

Every input must be marked quoted, contractual, estimated, unknown or not applicable. Unknown is not zero.

Market rent does not answer total cost

CBRE reported Montreal Class AAA net asking rents from $33 to $42 per square foot in Q2 2026.[1] It also reported 18.0% overall vacancy, falling to 12.4% if listings marketed for more than 36 months were removed.[1] Colliers described stronger fundamentals in higher-quality assets and pricing power for sought-after properties.[2]

Those facts help frame negotiation and availability. They do not establish:

• the rentable or usable area of a specific suite;
• additional rent or operating-cost reconciliation;
• tenant-improvement allowance;
• taxes passed through;
• furniture, cabling, internet or cleaning;
• professional and permit costs;
• restoration at expiry;
• the effective price after free rent or incentives.

A defensible comparison starts with the actual term sheet and draft contract.

Phase 1: search, transaction and diligence

Internal search cost

Record employee and executive time spent defining requirements, touring, comparing, negotiating and coordinating. This may not generate an external invoice, but it is a real project cost and can delay revenue work.

Brokerage and representation

Do not assume a broker is free to the occupier merely because another party pays a commission. Ask who represents whom, who pays, whether fees affect economics and whether any service becomes payable if the transaction does not close.

Legal review

Lease, licence, membership and sublease documents allocate different rights and obligations. Budget review of use, term, security, insurance, indemnity, operating costs, default, renewal, assignment, sublease and restoration. For a sublease, review the head lease and consent path.

Quebec’s Civil Code permits a lessee to sublease all or part of leased property but requires notice to the lessor and the lessor’s consent.[3] Do not model subleasing as a guaranteed escape hatch.

Technical and property review

Depending on the transaction, due diligence can include measurement, condition, mechanical capacity, electrical supply, connectivity, accessibility, hazardous-material or environmental issues, fire/life-safety, intended use and planned works. This page does not prescribe which professional is required; scope it against the real property and activity.

Phase 2: deposits, security and cash timing

Cash committed at signature can include:

• prepaid rent or service fees;
• security deposit;
• letter of credit, guarantee or other security;
• insurance premium;
• design or professional retainers;
• deposits for furniture, internet or construction;
• taxes due on charges.

A refundable deposit is not the same as an expense, but it is tied-up cash. Model both total cost and peak cash requirement.

Peak cash before opening
= non-refundable opening costs
+ refundable deposits/security funded in cash
+ prepaid recurring charges
- landlord/provider allowances actually available before payment

Do not assume an allowance is cash on signing. Record payment conditions, eligible work, documentation and timing.

Phase 3: design, permits and fit-out

Space planning and design

CCOHS says office-space requirements have no universal answer and should account for activities, equipment, storage, visitors, movement, acoustical and visual privacy and natural light.[4] A design based only on nominal headcount can create later costs for call rooms, storage, power or circulation.

Potential project lines include:

• test fits and workplace planning;
• architectural, engineering and specialist work;
• drawings, measurement and project management;
• demolition, partitions, ceilings and finishes;
• lighting, electrical and mechanical changes;
• acoustic treatment and doors;
• accessibility work;
• signage and branding;
• contingency and change orders.

Occupancy and interior-work permits

Ville de Montreal says a commercial, industrial or professional activity may require an occupancy permit linked to the establishment and operator. Interior work may require another permit. Supporting documents may include a precise use description, legal-existence records, owner authorization and layout plans.[5]

Before signing, identify:

• intended use and borough;
• whether the existing use matches;
• who prepares and submits documents;
• which works require approval;
• landlord approval and coordination;
• review and construction schedule;
• whether rent begins before legal and practical occupancy.

An agreement to rent a space is not itself a permit.

Delay and overlap

Model rent during fit-out, overlap with the old workspace, storage, temporary workspace, contractor delay and employee disruption. A lower-rent suite can lose its advantage if it takes months longer to become operational.

JLL identifies speed to occupancy, pre-built spaces and minimizing upfront capital as flexible-office motivations.[6] This does not prove flexible space is cheaper over every duration; it identifies where it can avoid or compress opening phases.

Phase 4: furniture, technology and move-in

Furniture

Budget desks, ergonomic chairs, storage, meeting furniture, reception, kitchen equipment and replacements. Confirm what stays with an existing suite and its condition.

CRA says purchased equipment such as a computer is not necessarily deductible as an immediate current expense and may instead attract capital cost allowance.[7] That illustrates why purchase price and accounting treatment should remain separate model columns. It is not a tax conclusion for the reader.

Connectivity and IT

Include installation and monthly charges for internet, backup connectivity, wired network, Wi-Fi equipment, firewall, telephony, audiovisual equipment and support. Ask whether a flexible provider offers a shared, segmented or dedicated network and what can be configured.

Access and security

Include keys, credentials, access-control installation, cameras where appropriate, alarm, visitor management and after-hours response. Verify privacy claims instead of assigning a dollar value to an untested assumption.

Moving and commissioning

Include movers, crates, storage, disposal, signage changes, employee communications, address updates, lost productivity and a realistic commissioning period.

Phase 5: recurring occupancy cost

Use a monthly table and a separate annual reconciliation column.

CRA’s GIFI guide separately identifies utilities such as electricity, gas, heating, hydro and telephone; permits and government fees; and amortization of leasehold improvements.[8] The categories help prevent omissions, but do not determine who pays or how an item is taxed.

Phase 6: capacity and operational friction

Unused capacity

An eight-desk room used by four people is not automatically bad; the extra area may provide needed privacy or growth. But the cost must be visible.

Utilization = occupied workstation-days ÷ available workstation-days
Cost per occupied workstation-day = monthly occupancy cost ÷ occupied workstation-days

Use actual attendance. Statistics Canada reported 9.8% hybrid, 11.4% home-only and 78.8% outside-home work nationally in May 2026.[9] National averages cannot substitute for a company’s schedule.

Meeting and privacy overflow

The leased room may need paid external rooms for confidential calls, interviews, client meetings or all-hands events. Conversely, a bundled coworking product may include credits but charge overages. Model historical or expected usage.

CCOHS calls for acoustical privacy appropriate to confidentiality and separately asks about visual privacy.[4] “Private office” is not proof of speech isolation.

Management time

Who handles internet outages, access cards, cleaning, deliveries, repairs, plants, furniture and vendor billing? A service model may bundle these tasks; a lease may internalize them. Estimate hours and responsibility, without pretending every hour becomes a cash saving.

Phase 7: change, renewal and exit

Escalation and reconciliation

Model contractual increases, service-fee renewal, additional-rent reconciliation and expiring incentives. Create a base, high and low case rather than assuming the opening price remains unchanged.

Growth and contraction

Record expansion rights, adjacent inventory, room-change process, assignment, sublease and early-termination terms. A flexible provider may offer shorter commitments, but the next room is still subject to availability and price.[6]

Restoration and surrender

Budget removal of cabling, signage, furniture or improvements; repairs; professional close-out; cleaning; movers; disposal and overlap with the next space. The exact obligation is contractual.

Sublease and assignment

Include marketing, professional review, consent, downtime, rent differential and continued liability if applicable under the documents. Article 1870 establishes notice and consent for Quebec sublease/assignment; it does not promise release or a successful replacement occupant.[3]

Tax and accounting boundary

CRA says lease payments for business property may be deducted under its stated rules.[7] It also says capital improvements or alterations to leased property can form part of a Class 13 leasehold interest, with treatment depending on the interest and terms.[10]

Use those sources to ask an accountant about:

• current expense versus capital property;
• furniture and technology;
• tenant improvements;
• incentives and allowances;
• GST/QST and input tax credits;
• financial-statement presentation;
• exit and restoration provisions.

Do not place guessed deductions into the economic model. Compare pre-tax cash first, then add a professionally prepared tax view separately.

A 36-month model with transparent invented assumptions

These numbers demonstrate the model only. They are not market prices, 2727 prices or a recommendation.

Option A: flexible private office

Year 1 = ($4,500 + $200) × 12 = $56,400
Year 2 = ($4,725 + $200) × 12 = $59,100
Year 3 = ($4,961.25 + $200) × 12 = $61,935
Total = $56,400 + $59,100 + $61,935 + $1,500 + $1,000
= $179,935

Option B: conventional lease

Year 1 recurring = $4,050 × 12 = $48,600
Year 2 recurring = $4,171.50 × 12 = $50,058
Year 3 recurring = $4,296.65 × 12 = $51,559.80
Total = $48,600 + $50,058 + $51,559.80 + $42,000 + $8,000 + $10,000
= $210,217.80

The illustrative flex option is lower over 36 months because the lease case carries large setup and exit inputs. Extend the horizon or change any assumption and the answer can reverse. That sensitivity is the point.

Sensitivity table

Build a grid around the variables most likely to be wrong.

Calculate total cost, peak cash and cost per occupied workstation-month for every case. An option is robust when its advantage survives reasonable changes.

Where 2727 Coworking fits

2727 offers furnished enclosed offices in a shared, staffed environment at 2727 Rue Saint-Patrick, Montreal. Exact office price, room, capacity, term and availability must be confirmed at the time of inquiry. The comparison value is the scope actually included in the dated quote, not a generic promise that coworking is always cheaper.

The model can eliminate or bundle many fit-out and operating lines. It can also introduce meeting-room quotas, shared facilities, limited customization and renewal/availability risk. Record each item in the same model used for conventional space.

Complete hidden-cost checklist

• Requirement definition and internal project time
• Brokerage and legal review
• Measurement and technical diligence
• Deposits, guarantees and prepaid charges
• Design, engineering and project management
• Occupancy and construction permits
• Fit-out, change orders and contingency
• Furniture, storage and kitchen equipment
• Internet, cabling, AV, telephony and support
• Security, access and visitor systems
• Moving, storage, disposal and downtime
• Base and additional rent/service fee
• Taxes and annual reconciliations
• Utilities, cleaning, insurance and repairs
• Meeting rooms, printing, mail and overages
• Parking, cycling and commute support
• Unused capacity and privacy overflow
• Management and vendor coordination
• Escalation, renewal and expiring incentives
• Growth, contraction, assignment and sublease
• Restoration, surrender and final move

Frequently asked questions

What is the biggest hidden cost?

It depends on the transaction. For a shell or heavily modified suite it may be fit-out and delay; for a hybrid team it may be unused capacity; for a poor agreement it may be exit exposure. Model all phases.

Is net rent the rent I pay?

It is not necessarily the total. CBRE’s $33–$42 Class AAA measure is explicitly a net asking-rent range, not an all-in quote.[1]

Are utilities separate?

They may be included, separately metered, allocated or recovered through another charge. CRA’s accounting guide lists electricity, gas, heating, hydro and telephone as categories but does not allocate them between contracting parties.[8]

Does a furnished office avoid permits?

Not automatically. Montreal ties occupancy authorization to the premises, operator and activity, and interior work may trigger another permit.[5]

Can I include tax savings in the comparison?

Only after professional analysis. CRA distinguishes lease payments, equipment and leasehold improvements; their treatment is not interchangeable.[7] [10]

Research method and limitations

This model uses CBRE, Colliers, JLL, CCOHS, Statistics Canada, CRA, LegisQuebec and Ville de Montreal sources reviewed August 23, 2026. It does not allocate any cost to a party without the specific contract and does not estimate current provider pricing. All arithmetic examples use invented, prominently labeled inputs.

Advanced model: define every cost before pricing it

A comparison fails when the same label means different things. Before adding numbers, create a data dictionary that states the unit, invoicing party, tax treatment, payment date, escalation, refundability and evidence status for every line.

Rent may mean net rent, gross occupancy cost or an all-inclusive service fee. Internet included may mean shared Wi-Fi when the team needs a dedicated circuit, segmentation, static addresses or after-hours support. Furnished may mean desks and chairs but exclude storage, monitor arms, reception seating and meeting furniture.

Use five statuses:

An option with a higher quoted price but fewer unknowns can carry less budget risk than a lower headline price with unpriced work, unclear operating costs and no exit estimate.

Maintain economic, cash and commitment ledgers

One total cannot answer every decision.

Economic ledger

Assign cost to the period receiving the benefit. Furniture paid before opening still belongs in the comparison. A refundable deposit is not automatically an expense merely because cash left the bank.

Cash ledger

Record the actual payment date for deposits, retainers, prepaid rent, construction draws, furniture deposits and taxes. This ledger determines whether the move can be funded.

Commitment ledger

Record unavoidable future obligations under the agreement, guarantees and signed purchase orders. It shows exposure if revenue falls, headcount shrinks or the project is cancelled.

Report:

Total modelled economic cost
Peak cumulative cash before opening
Peak total funding requirement
Remaining commitment by quarter
Recoverable cash and expected recovery date
Cost per occupied workstation-month
Cost per team attendance-day

Do not subtract a tenant allowance until eligibility, documentation, approval and payment timing are known. An allowance received after invoices are paid reduces final cost but not peak financing.

Cost taxonomy by time

Before signature

• requirements and observed attendance;
• internal search and decision time;
• brokerage, legal and accounting review;
• test fits, measurement and technical diligence;
• network, power and mechanical feasibility;
• permitted-use and approval review;
• financial review of deposits, guarantees and commitments.

At signature

• deposits and prepaid amounts;
• guarantee or letter-of-credit cost;
• insurance binders;
• design retainers;
• non-refundable setup fees;
• construction and furniture deposits.

Before opening

• design, permits and professional work;
• demolition, partitions, acoustics and finishes;
• electrical, mechanical, lighting and accessibility work;
• furniture, IT, audiovisual and security equipment;
• movers, storage, disposal and address changes;
• old-space overlap and temporary workspace;
• commissioning, training and corrections.

Montreal says the occupancy permit is attached to the establishment and operator, and interior work can require another permit.[5] Signing alone does not make the activity immediately authorized.

During occupation

• base rent or service fee;
• additional rent, taxes and reconciliation;
• energy, water, internet, cleaning and waste;
• insurance, maintenance and repairs;
• reception, security and access administration;
• meeting-room, print, storage and mail overages;
• parking, commute support and facilities-management time;
• capacity paid for but not used.

At change or exit

• renewal repricing or room-change fees;
• duplicate occupation during the next move;
• assignment/sublease marketing and professional fees;
• rent differential and continuing exposure;
• furniture removal, storage, sale or disposal;
• removal of cabling, signage or improvements;
• restoration, cleaning and surrender documentation;
• delayed deposit recovery.

Quebec's notice and consent framework makes sublease a possible mitigation, not guaranteed proceeds or release.[3]

Fit-out: control scope before price

Do not begin with a universal cost per square foot. CCOHS points to activities, equipment, storage, visitors, movement, acoustic and visual privacy and natural light.[4] Translate each requirement into scope.

These are prompts, not findings about a real suite.

For each landlord contribution record the maximum, eligible work, excluded work, taxes, professional fees, contractor control, approval, reimbursement evidence, payment date, unused balance and clawback. Free rent is not cash: it may waive specified rent while additional rent, utilities and construction remain payable.

Show contingency separately from known scope. Stress concealed conditions, after-hours work, material delay, landlord coordination, permit response, electrical capacity and user changes. A percentage cannot cure incomplete design.

Utilities and service allocation

CRA identifies electricity, gas, heating, hydro and telephone as separate categories.[8] Ask how each is allocated.

• Is electricity metered, submetered, allocated or included?
• Is HVAC available during actual work hours, and is after-hours service charged?
• Does cleaning include the suite, common areas, supplies and waste?
• Who replaces filters, lamps, locks and damaged furniture?
• Is internet shared or supported to stated capacity and response time?
• Are installation, equipment rental and cancellation separate?
• Is backup connectivity required?

An included service still creates cost when it does not meet the requirement and must be supplemented.

Furniture and technology lifecycle

Model delivery, assembly, configuration, repairs, replacement, relocation and disposal, not only purchase price. Separate useful life from occupancy term. Furniture abandoned after eighteen months has a different result from furniture reused at the next location.

For each asset ask whether it is owned, rented, financed or included; whether it can fit the next plan; who repairs it; whether a spare is needed; what happens at exit; and whether secure storage or a fixed setup is required.

CRA notes that purchased equipment such as a computer is not necessarily an immediate current expense.[7] That supports separate cash and tax/accounting columns; it does not determine treatment for a reader.

Market vacancy is not team utilization

Montreal market vacancy describes available listings, not a team's office use. CBRE's result changes when listings marketed longer than 36 months are removed.[1] Inspect matched, operationally suitable options instead of assuming headline vacancy guarantees a bargain.

Measure four kinds of unused capacity:

1. Structural: deliberately held for growth.
2. Schedule: empty because hybrid schedules differ.
3. Mismatch: available space cannot support the task, privacy or equipment.
4. Failure: unavailable because of outage, construction or access.

Statistics Canada's national work-location shares are context, not a company forecast.[9] Use observed peak attendance, simultaneous calls and planned hiring.

Invented capacity scenario

Assume eight people, eight workstations and twenty workdays.

At an invented C$8,000 monthly cost, cost per occupied workstation-day ranges from C$133.33 to C$50. This does not prove that full attendance is more productive or spare space wasted. It prices flexibility and growth.

Invented cash-timing scenario

The ultimate net is C$88,000, but C$133,000 must be funded before the assumed reimbursement. Subtracting the allowance on day one hides C$45,000 of peak cash.

Five-year sensitivity example

All figures are invented and demonstrate method, not Montreal pricing.

The illustration increases recurring cost annually. Real agreements may use other dates and separate escalation rules.

The purpose is to test whether the recommendation survives plausible outcomes. Repeat for delay, escalation, peak headcount and meeting-room overflow.

Failure modes

Unlike area measures

Rent may use rentable area while team planning uses usable area. Preserve the measurement basis.

Unknown treated as included

Silence on cleaning, electricity, after-hours access or restoration is not contractual inclusion.

Opening dependencies ignored

Link permits, landlord approval, construction, furniture, network and move. Add overlap and temporary space when the opening slips.

Average attendance used as capacity

An average of four can hide eight people every Tuesday. Plan for peaks and simultaneous activities.

A door assumed to solve privacy

CCOHS separates acoustic privacy, visual privacy and concentration.[4] Test conditions; do not infer confidentiality.

Incentives counted twice

Do not subtract free rent and allowance from an effective-rent figure that already includes them. Reconcile face charges to modelled cost.

Deposit counted as expense and recovery

Show it in cash, exclude recoverable value from economic cost, and stress recovery timing/risk.

Exit flexibility assumed

Do not book sublease proceeds without consent, marketing time, rent differential and continuing-liability assumptions.[3]

Questions before approval

Landlord, sublandlord or provider

• What is included, and which charges reconcile?
• Which access hours and services apply to this exact product?
• What security is required and when is it returned?
• Which work is permitted, approved and retained?
• What must be removed or restored?
• What happens if permits or work are delayed?
• What are assignment, sublease, room-change and early-exit rules?
• Which capacity, accessibility, connectivity or acoustic claims are documented?

Contractor and project team

• What is included, excluded, provisional or owner-supplied?
• Which drawings and approvals are assumed?
• What are the long-lead items and dependencies?
• How are change orders authorized?
• What contingency covers which risk?
• What commissioning and close-out evidence is delivered?

IT, furniture and operating vendors

• What installation and cancellation charges apply?
• What support hours and replacement process are included?
• Can assets be reused elsewhere?
• Who owns cabling and equipment at exit?
• Are taxes, delivery, assembly, consumables and disposal included?

Internal leadership

• What horizon and peak cash can the company support?
• Which commitments remain acceptable if headcount falls?
• Which operating requirements are non-negotiable?
• Who approves assumptions and tracks monthly variance?

Additional FAQs

Should every cost become dollars per square foot?

No. Keep native units for user-, device-, room-, transaction- and time-based costs, then calculate common outputs such as cost per occupied workstation-month.

How should free rent be modelled?

Record exact waived months and charges. Do not assume additional rent, utilities or work disappear. Keep free rent separate from cash allowances and check clawbacks.

Is a refundable deposit a hidden cost?

Usually it is a cash and risk item, not permanent economic cost. Show funding, expected recovery and a stressed recovery case.

What contingency percentage should be used?

No universal percentage is supported here. Base it on design completeness, condition, approvals, procurement, schedule and professional advice.

Does high vacancy mean inexpensive fit-out?

No. Vacancy describes listings; scope, condition, approvals and schedule determine fit-out.[1]

When can flex cost more?

When a stable team remains for a long time, consumes overages or pays for bundles it does not value. Compare matched horizons and scope.

When can a conventional lease cost more?

When opening capital, delay, management, unused capacity or restoration is large relative to the term. Peak cash and commitment may also be higher.

How often should the model change?

At each proposal, contract, scope or schedule revision, then monthly after occupancy. Preserve prior versions so decision-makers can identify the changed assumption.

Decision memorandum: what approvers should receive

The spreadsheet is not the decision. Give approvers a short memorandum that exposes what the spreadsheet assumes.

It should identify the business requirement, options compared, common horizon, opening date, peak attendance, non-negotiable requirements, current quote dates and contractual documents reviewed. State which lines remain unknown and who must resolve them. Present economic cost, peak cash, remaining commitment and operational fit separately.

For each option, show:

• base, low and stressed totals;
• the three assumptions with greatest influence;
• the earliest date the space can operate legally and practically;
• cash required before that date;
• exposure if opening is delayed by one, two and three months;
• exposure if headcount falls or grows;
• exit route and the evidence that it is available;
• services or capital that the option avoids;
• services or control that the option does not provide.

End with conditions, not false precision. A useful approval might be conditional on written confirmation of operating-cost inclusions, permit feasibility, network scope, allowance timing and restoration. Record the owner and deadline for each condition.

Variance control after opening

Compare actuals with the approved model every month. Separate price variance, quantity variance, timing variance and unplanned scope. For example, a higher electricity invoice is a price variance only if consumption matched the assumption; increased attendance or added equipment can create a quantity variance. A construction invoice paid late changes cash timing even if total cost is unchanged.

Track:

This turns the model into a management system rather than a one-time sales comparison.

Evidence retention

Keep the dated proposal, contract schedule, invoices, approvals, plans, permit correspondence, allowance submissions, commissioning records and model version supporting each material input. Link each important cell to evidence or an assumption note. If the number cannot be traced, it should not silently become institutional fact.