How Tenant Improvements Work in a Commercial Lease

Commercial spaces rarely fit every business exactly as they are. A new tenant may need private offices, updated flooring, additional plumbing, specialized electrical service or a completely different layout. These changes are generally known as tenant improvements, or TIs, and they are often an important part of lease negotiations.

What Are Tenant Improvements?

Tenant improvements are alterations made to a leased space to prepare it for a tenant’s use. They may range from paint and carpet to major construction involving walls, restrooms, mechanical systems or specialized equipment. Routine maintenance and a tenant’s movable furniture or equipment are usually treated separately.

Common Ways Improvements Are Structured

The parties can handle improvements in several ways. A landlord may provide a tenant improvement allowance stated as a total amount or an amount per square foot. The tenant typically manages the work and submits qualifying expenses for reimbursement, subject to the lease terms.

With a turnkey buildout, the landlord agrees to deliver the space according to an approved plan or scope of work. In other cases, the tenant accepts the premises as-is and pays for all changes. The parties may also share costs or incorporate some costs into the rental rate.

What Does an Allowance Cover?

The lease should explain which expenses qualify. Allowable costs may include design services, permits, construction labor, materials, flooring, lighting and certain building systems. Furniture, trade fixtures, technology, moving expenses and branding may be excluded unless specifically negotiated.

The agreement should also state when funds will be paid, what documentation is required and whether unused allowance funds are forfeited or may be applied elsewhere.

Who Controls the Work?

Control varies by transaction. The landlord may select the contractor and oversee construction, or the tenant may manage the project subject to landlord approval. Either way, the parties should agree on plans, contractors, insurance requirements, permits, deadlines and change-order procedures before work begins.

Clear responsibility matters because delays can affect when the tenant can open for business and when rent begins.

Pay Attention to Timing

The lease should distinguish among the lease commencement date, possession date, construction period and rent commencement date. These dates are not always the same. A well-defined schedule should also address what happens if construction is delayed and whether the tenant receives early access for installation or setup.

Understand Ownership at the End of the Lease

Many improvements become part of the building and remain when the lease ends. Other items may be considered trade fixtures that the tenant can or must remove. The lease should identify removal and restoration obligations so the tenant is not surprised by costs at move-out.

Put the Details in Writing

Tenant improvements can involve high cost and coordination. A detailed work letter, plan or exhibit can reduce misunderstandings by documenting the scope, budget, approval process and schedule.

NAI FMA Realty helps landlords and tenants evaluate spaces and coordinate the business terms of commercial leases throughout Lincoln and the surrounding market. Legal and construction professionals should review the final documents and project requirements.

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Posted on September 18, 2026