Included Scope
Demising walls, partitions, finishes, ceiling work, lighting, MEP modifications, IT and AV cabling, basic millwork, furniture-ready hand-off, permit coordination, and construction management.
What it costs to build out an office tenant improvement in the Greater Toronto Area, anchored in Q4 2025 Class B benchmark data. This guide covers Class A, Class B, and Class C fit-out spreads, base building condition risks, schedule premiums, and when an office TI escalates from GC-native scope to engineering-reviewed work.
Class D conceptual range for feasibility planning. Not a quotation, tender, financing basis, or contract value.
Run an Office TI Estimate Back to Cost GuidesThis guide is for Class D conceptual planning, where the expected accuracy band is roughly +/-20-30% under AACE 18R-97. It applies before complete drawings, full trade pricing, or tender documentation exists.
Demising walls, partitions, finishes, ceiling work, lighting, MEP modifications, IT and AV cabling, basic millwork, furniture-ready hand-off, permit coordination, and construction management.
Base building shell, structural modifications, major envelope work, landlord capital repairs, major central plant replacement, furniture procurement, land, financing, and business relocation costs.
Lease budgeting, landlord allowance review, test-fit decisions, tenant improvement allowance negotiation, phasing review, and deciding whether the project needs deeper technical review.
C$180-260 per square foot for a Class B office tenant improvement at standard quality.
This applies to Toronto, Mississauga, Markham, Vaughan, North York, Etobicoke, and comparable GTA office markets where labour, landlord coordination, parking, access, and schedule pressure can push the range higher.
C$140-210 per square foot depending on labour market, building condition, landlord standards, municipality, and fit-out complexity.
Secondary markets may price lower than GTA core, but base building condition and MEP capacity can still dominate the budget.
A 25,000 sq ft Class B GTA fit-out at the midpoint of the benchmark band can sit around the C$5.5M-C$6.5M hard-cost zone before soft costs, contingency, HST, and tenant-side business costs.
Basic finishes, limited millwork, simple meeting rooms, standard ceiling and lighting, and minimal specialty spaces. A practical planning range is roughly 85% of standard Class B cost.
Higher finish quality, stronger reception presence, improved meeting spaces, more glass, better lighting, upgraded washrooms or pantries, and higher acoustic expectations. A planning range can run roughly 20% above standard.
Executive suite quality, custom millwork, high-end stone or wood finishes, large boardrooms, specialty AV, brand environments, and dense feature areas. A planning range can run roughly 45% above standard.
Architectural design, engineering coordination, permit drawings, landlord review, code review, and municipal submissions can add a meaningful soft-cost layer before construction starts.
Even when furniture is excluded from construction, the construction scope must coordinate power, data, AV, access control, meeting room technology, and workstation layout.
Soft costs typically add roughly 12-20% on top of hard cost before HST, furniture procurement, tenant move costs, financing, and business interruption costs.
A clean shell-condition turnover is the baseline. If the space requires demolition of old partitions, removal of legacy cabling, MEP cleanup, floor levelling, ceiling removal, or remediation before new work begins, the budget can move before design upgrades are added.
HVAC zoning, supplemental cooling, electrical capacity, plumbing for break rooms or showers, added meeting room loads, server room requirements, and landlord building standards can shift a simple office TI toward higher pricing.
Standard landlord fixturing periods often sit around 60-90 days. Aggressive 30-day turnovers can add overtime, weekend work, congestion, sequencing risk, and concurrent crew premium.
Reception, boardrooms, executive offices, wellness rooms, phone booths, pantries, custom signage, acoustic treatments, and high-density meeting areas push the project toward the upper band.
Many GTA office tenant improvements are straightforward, but certain existing-building conditions can add cost, review time, and uncertainty.
Converting office space into medical office, daycare, food service, laboratory, training space, or other specialty occupancy can trigger OBC change-of-use review. The base building must support the new occupancy.
Older buildings may require washroom, corridor, elevator, entrance, or common-area accessibility upgrades when significant tenant improvement work is performed.
New layouts can require sprinkler relocation, alarm device changes, exit sign updates, emergency lighting revisions, and plan review by the building's life-safety team.
Pre-1990 buildings often require a designated substance survey before demolition. Asbestos, lead, silica, mercury, or other materials can affect both cost and schedule.
Most office tenant improvements can be handled by the tenant team, architect, general contractor, and trades. Engineering review becomes more important when the project includes mid-rise or high-rise shell modification above roughly C$10M, structural changes, central plant modification, major electrical service changes, laboratories, data centres, broadcast studios, medical clinics, or other specialty occupancies.
ProWise Engineering certification and compliance reviewFor Q4 2025, a Class B office TI benchmark is about C$180-260 per square foot in the GTA at standard quality. Premium Class A finish can run higher, while economy fit-out can sit below the standard band.
Legacy partitions, old cabling, MEP cleanup, floor levelling, outdated sprinkler layouts, limited electrical capacity, accessibility gaps, and pre-1990 demolition conditions can all affect the cost before new finishes are installed.
Engineering review is more likely when the project includes structural changes, central plant or major MEP modifications, high-density technical spaces, medical use, lab use, data rooms, or large shell modifications.
Use the calculator for a Class D feasibility range. If the space has older-building conditions, aggressive schedule pressure, specialty occupancy, or major MEP scope, move into a detailed estimate inquiry.
Run the Calculator Request a Detailed EstimateClass D conceptual estimate per AACE International Recommended Practice 18R-97. Not a quotation. Not a basis for financing or contract value. Material decisions require qualified engineering and quantity-surveying review. Q4 2025 benchmarks include public and industry cost references used for early planning context.