Landlord Work vs. Tenant Work in Commercial Leases: The Complete Definition Guide

1. Core Definitions: What Is Landlord Work vs. Tenant Work?

Every commercial lease must answer a deceptively simple question: before the tenant moves in, who builds what? The answer is split into two buckets — landlord work and tenant work — and the dividing line between them has enormous financial consequences.

Landlord Work (Base Building Work)

Landlord work refers to all construction, renovation, or improvement that the landlord agrees to complete—at the landlord's own cost—prior to delivering the leased premises to the tenant. It is sometimes called base building work, landlord's construction obligations, or building standard improvements.

Landlord work typically includes items that:

• Are required by code for the building to be legally occupied
• Benefit all tenants collectively (e.g., lobby, elevators, common HVAC systems)
• Are part of the building shell or structural system
• The landlord has agreed to specifically as a concession in lease negotiations

Common examples of landlord work include: bringing the space to a legally leasable condition, repainting and re-carpeting in a second-generation space, replacing a roof before delivering an industrial building, or completing a lobby renovation as part of attracting a large anchor tenant.

Tenant Work (Tenant Improvements / Fit-Out)

Tenant work (also called tenant improvements, leasehold improvements, or simply fit-out) is any construction, alteration, or installation that the tenant performs to make the space functional for their specific business. Tenant work is customized — it makes the space work for the tenant's particular use case, brand, or operational requirements.

Examples of tenant work include: building interior partitions and offices, installing custom lighting and flooring, wiring a data center, installing a commercial kitchen hood, creating custom reception areas, or installing branded millwork and signage.

2. Space Delivery Conditions: Shell, Warm Shell, and Turnkey

The most important variable in defining landlord work is the agreed-upon delivery condition of the space. There are three standard delivery conditions, each representing a different scope of landlord responsibility.

Why Delivery Condition Matters So Much

The difference between shell and vanilla delivery can be $60–$100 per square foot in construction costs. On a 5,000 SF office space, that's $300,000–$500,000. Tenants who don't understand their delivery condition often get blindsided when they receive a GC bid far higher than they expected.

3. The Work Letter: What It Must Contain

The work letter (also called a construction rider, tenant improvement exhibit, or build-out exhibit) is the document — almost always an exhibit to the lease — that governs all aspects of the construction of the leased space. It is separate from the lease body but equally binding.

A well-drafted work letter should include all of the following:

• Scope of Landlord Work: A detailed description or list of exactly what the landlord will construct, including specifications and standards. The more specific, the better — "HVAC system" is less enforceable than "HVAC serving approximately 1 ton per 300 SF, to be installed by [landlord's contractor]."
• Scope of Tenant Work: Everything the tenant is responsible for, referencing an approved space plan where possible.
• TI Allowance Amount: Total dollar amount, per-SF rate, and which costs are eligible (hard construction only vs. soft costs including architecture, permits, FF&E).
• TI Disbursement Method: How and when the TI is paid — lump sum at completion, progress draws, reimbursement after completion, or landlord-managed construction.
• Construction Schedule: Deadline for landlord to complete landlord work, deadline for tenant to submit plans, construction period, and estimated delivery date.
• Plan Approval Process: Who approves tenant's construction drawings, how long the landlord has to respond, and what happens if the landlord fails to respond timely.
• Contractor Requirements: Whether tenant must use landlord's preferred contractors, union labor requirements, insurance requirements for tenant's contractors.
• Overrun Responsibility: Who pays if build-out costs exceed the TI allowance, and whether the tenant can elect to receive unused TI as rent credit.
• Delivery Condition: Precise definition of the condition in which the space will be delivered ("broom clean," specific systems in working order, etc.).
• Delivery Failure Remedies: What happens if the landlord delivers the space late — typically rent abatement during the delay and/or a termination right if delivery is excessively delayed (often 90–180 days).

4. TI Allowances: Structure, Timing & Cash Flow

The tenant improvement (TI) allowance is one of the most important economic terms in a commercial lease — often the second most valuable concession after free rent. Understanding how TI allowances are structured, disbursed, and accounted for is critical to managing your move-in cash flow.

How TI Allowances Are Structured

TI allowances are quoted in dollars per rentable square foot ($/RSF). Market TI allowances vary significantly by:

• Market conditions — In soft markets, TI allowances of $80–$120/RSF are common for office; in tight markets, $30–$50/RSF
• Lease term length — Longer leases (7–10 years) command substantially higher TI allowances than short-term leases (3–5 years)
• Asset class — Class A buildings offer higher TI than Class B/C, but often require more expensive finishes
• Tenant creditworthiness — Investment-grade tenants negotiate higher TI because the landlord faces lower default risk

TI Disbursement Methods

There are three common methods for how the TI allowance is actually paid:

Eligible vs. Ineligible TI Costs

Not all costs can be drawn against TI. The work letter should specify what is "TI-eligible." Common distinctions:

5. Cost Overruns: Who Pays When Build-Out Exceeds TI?

Almost every significant commercial build-out involves cost overruns — construction pricing is notoriously volatile. The lease must clearly define what happens when total build-out costs exceed the TI allowance.

Standard Overrun Allocation

In the vast majority of leases, cost overruns above the TI allowance are the tenant's responsibility. This is the default rule and it rarely changes. What tenants can negotiate is:

• A "not-to-exceed" clause where the landlord's contractor must stop and get tenant approval if costs will exceed TI before proceeding
• The right to value-engineer the build-out to stay within TI (requires advance approval on substitutions)
• A contingency reserve built into the approved construction budget

Unused TI: The Forfeiture Problem

If your actual build-out costs come in under the TI allowance, what happens to the remainder? By default: it's forfeited. Unused TI does not convert to cash or rent credit unless the lease explicitly says so. This is one of the most frequently lost tenant negotiating points — and one of the most valuable to fight for.

6. Negotiation Tactics: How Tenants Win on Work Letter Terms

The work letter is often attached as a short exhibit and receives far less scrutiny than the main lease body. That's a mistake — for tenants doing any significant build-out, the work letter may govern millions of dollars of construction and cash flow. Here are the most important items to negotiate:

1. Define the delivery condition precisely. Don't accept vague language like "in its current condition." Specify: which systems will be operational, to what capacity, and what finish level. Reference a delivery condition inspection checklist if possible.
2. Expand eligible costs to include soft costs. Architecture, engineering, permit fees, and data cabling should all be TI-eligible. These can represent 15–25% of your total project cost.
3. Negotiate unused TI as rent credit or free rent. This is the single highest-value negotiation point most tenants miss. Even a 10% underrun on a $300,000 TI budget = $30,000 in value.
4. Establish a draw schedule for early-stage projects. If you're managing construction yourself, negotiate progress draws (e.g., 25% at structural completion, 50% at MEP rough-in, 25% at substantial completion) rather than one lump sum at the end. This protects your cash flow.
5. Cap your liability for overruns in landlord-managed builds. In landlord-managed construction, the landlord may not share pricing transparency. Require open-book bidding, competitive GC selection, and a cap on markup (typically 5–10% overhead and profit).
6. Set a hard deadline for landlord work with rent abatement remedies. If landlord work delays your opening, you should receive rent abatement equal to the delay — day for day. Also negotiate a termination right if the space is not delivered within 90–180 days of the deadline.
7. Require lien protection. When the landlord manages construction, confirm that contractor lien waivers are collected at each payment. A mechanic's lien filed against the property (even for work you paid for) can affect your occupancy.

7. Pre-Signing Work Letter Checklist

Before you sign any commercial lease involving a significant build-out, verify these items in the work letter and lease:

• Delivery condition is defined with specifics (not just "as-is" or "warm shell" without further definition)
• TI allowance amount is stated in dollars per RSF and confirmed as total dollar amount
• Eligible costs are defined — and you've confirmed architecture, engineering, permits, and data cabling are included
• TI disbursement method is clearly stated (tenant-managed reimbursement vs. landlord-managed)
• A draw schedule or reimbursement timeline is specified (not "within a reasonable time")
• Overrun responsibility is explicitly assigned to the tenant (expect this — the key is managing it)
• Unused TI language explicitly states what happens to any remaining balance
• Plan approval timeline is specified — landlord must respond within X business days or be deemed approved
• Contractor requirements are clear — can you use your own GC, or must you use landlord's list?
• Landlord work deadline is a hard date, not "reasonably promptly"
• Delivery delay remedy is included (rent abatement per day of delay)
• Termination right exists if space is not delivered within 90–180 days of deadline
• Restoration obligations at lease end are specified — must you return the space to original condition?

Frequently Asked Questions

Related Resources

• Commercial Lease Pre-Signing Checklist — 30 items to review before you sign
• Commercial Lease Glossary — 50+ key terms defined
• Lease Types Explained — NNN, gross, modified gross, and more
• Tenant Improvement Allowance: The Complete Guide