In Plain English
Quick Answer
The construction work done to customize a leased commercial space for a specific tenant.
Definition
Definition
Tenant Improvement refers to the construction work performed to customize a commercial space to meet a tenant's specific requirements, typically within a base building shell provided by the landlord. TI work commonly includes partitions, ceilings, flooring, lighting, HVAC distribution, and restrooms. A Tenant Improvement Allowance (TIA) is an amount provided by the landlord to offset the cost of TI construction, with the tenant responsible for costs exceeding the allowance.
Context
Why It Matters in Bidding
Tenant improvement work dominates commercial interior bidding, and the tenant allowance (TIA) directly shapes how aggressively a GC must value-engineer to keep the tenant from paying out of pocket. Estimators must reconcile the design intent against the allowance, the base-building conditions, and the lease deadlines that drive schedule and overtime risk.
Example
Example
A GC bidding a 12,000 SF office TI compares the buildout estimate against the landlord's $45-per-SF allowance, then itemizes the overage so the tenant can decide which upgrades to keep before the lease commencement date locks the schedule.
See Also
Related Terms
FAQ
Questions Contractors Ask
What does a tenant improvement allowance cover in a bid?
A TI allowance offsets construction costs to customize leased space, often covering partitions, finishes, lighting, and HVAC distribution. It rarely covers furniture, IT cabling, or soft costs unless the lease says so. Estimators should map every bid line against the allowance to show the tenant exactly where overages occur.
Who pays for TI costs that exceed the allowance?
Costs above the landlord-provided allowance are generally the tenant's responsibility, paid directly or amortized into rent. This makes clear, itemized estimating critical, because the tenant uses the GC's breakdown to decide which scope to cut or upgrade. Transparent overage tracking protects the bidding relationship and reduces award-stage disputes.
How does base-building condition affect a TI estimate?
Whether the space is a cold dark shell, warm shell, or a prior tenant's buildout dramatically changes scope. A cold shell needs HVAC, distribution, and demising walls the estimator must add, while reusing existing infrastructure cuts cost. Verify the delivered condition in the lease and base-building specs before pricing.
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