A commercial space can look just right, until you start the tenant improvement process.
The location works. The layout seems close. The landlord is ready to move.
Then the construction team discovers that the electrical service, HVAC, plumbing, accessibility, or permitting path doesn’t support the plan. And there goes your budget and opening date.
That’s why tenant improvement planning should begin before demolition and, ideally, before the lease is final. Early input from the project team can show what the space will actually require while you still have room to negotiate, revise the plan, or choose a different property.
We’ve helped dozens of businesses plan and execute cost-effective tenant build-outs.
This guide will help you make smart decisions early that lead to on-time openings and solid ROI. But first, let’s get clear on the basics.
What is tenant improvement construction?
Tenant improvement construction is the work required to adapt a leased commercial space for a particular tenant or business.
It’s also called a tenant build-out, commercial build-out, or leasehold improvement.
The scope can range from finishes and partitions to a major reconfiguration involving mechanical, electrical, plumbing, fire protection, accessibility, and life-safety systems.
A tenant improvement might start with an empty shell, a former business that used the space differently, or an occupied building that needs to remain operational during construction. Each carries different risks that should be understood before the scope, budget, and schedule are locked in.
What should you confirm before signing a commercial lease?
The lease may define who pays for the work, but it doesn’t tell you whether the space can support it. Before committing, evaluate the property against the operation you intend to run there.
Does the space support your intended use?
A previous tenant’s use doesn’t guarantee approval for yours. A retail shop, clinic, office, childcare center, and restaurant place different demands on a building.
Confirm the proposed use, occupancy requirements, parking, customer and delivery access, restroom needs, equipment, and any specialized reviews. If the use is changing, the project may trigger requirements that weren’t part of the previous tenant’s space.
Can the existing building systems handle the operation?
A utility connection can exist without having enough capacity. Check electrical service, HVAC, water, sewer, gas, fire protection, ventilation, and telecom against the actual equipment and occupancy plan.
These questions are especially important for restaurants, clinics, and other equipment-intensive businesses. Kugel’s Dairy Queen-to-Taco Bell conversion in Redmond preserved the existing footprint and parking, but still required kitchen, grease, signage, trash, and site-entry upgrades for the incoming tenant. Existing infrastructure created value; it didn’t eliminate the work.
Kugel’s guide to ground-up restaurant construction versus conversion explores that decision in more detail.
What belongs to the landlord, and what belongs to the tenant?
The lease and work letter should clearly identify landlord work, tenant work, base-building upgrades, the tenant improvement allowance, approval requirements, and how funds will be released.
Construction questions belong in the conversation before those documents are final. A contractor can help identify scope gaps and practical risks, while your broker and attorney advise you on the lease terms and legal responsibilities.
What could affect permits and approvals?
Tenant improvement requirements vary by city, project type, and scope. Interior reconfiguration, structural work, trade changes, a change of use or occupancy, accessibility upgrades, and food-service or healthcare requirements can all affect the approval path.
That variation matters across the I-5 corridor. Kugel’s guide to how commercial construction changes from Portland to Seattle explains why the same basic project can carry different permitting, frontage, and utility requirements from one jurisdiction to another.
What does the tenant improvement construction process involve?
A well-run tenant improvement typically moves through six connected stages:
- Define the use and operational requirements. Document how the business needs to function, including staffing, customer flow, deliveries, equipment, technology, storage, and target opening date.
- Evaluate the existing space. Review available drawings and inspect the structure, utilities, building systems, access, code conditions, and visible signs of previous or undocumented work.
- Establish scope, responsibilities, and budget. Separate landlord work, tenant work, owner-purchased equipment, allowances, exclusions, and unresolved conditions.
- Coordinate design and approvals. Align the owner, tenant, landlord, architect, engineers, contractor, equipment vendors, and permitting agencies before work begins.
- Plan procurement, phasing, and construction. Identify long-lead items, shutdowns, work-hour restrictions, temporary access, inspections, and dependencies between trades. Then build the schedule around the real operational constraints.
- Complete inspections and closeout. Finish corrections, test systems, assemble warranties and operating information, and hand over a clean, complete space that’s ready to use.
Clear ownership matters. The general contractor should keep costs, scheduling, trades, inspections, and field conditions moving together instead of leaving the tenant or property manager to coordinate everything.
What drives tenant improvement costs?
Tenant improvement costs depend less on the visible finishes than many owners expect. The largest variables often sit behind the walls or inside the project requirements:
- The condition and previous use of the space
- Mechanical, electrical, plumbing, and fire-protection upgrades
- Change-of-use, accessibility, and life-safety requirements
- Specialized equipment, ventilation, or utility demands
- Finish standards and landlord or brand requirements
- Hidden conditions, phasing, and accelerated schedules
Generic cost-per-square-foot figures can be misleading because two spaces of the same size may require very different work. A realistic early budget should distinguish the repeatable interior scope from the building-specific unknowns that could change it.
If exterior service connections, drainage, access, or frontage work are involved, review Kugel’s guide to commercial sitework and utilities. Those less-visible scopes can have an outsized effect on the budget and schedule.
How long does a commercial tenant improvement take?
There isn’t one reliable timeline for every tenant improvement. The schedule depends on design complexity, landlord approvals, permitting, utility work, long-lead materials, existing conditions, and whether construction must be phased around an occupied space.
The important date isn’t simply when construction starts. It’s when design, approvals, purchasing, fieldwork, inspections, equipment installation, and business preparations come together for opening. A good schedule identifies those dependencies and the decisions required to keep work moving.
Can a business remain open during tenant improvements?
Sometimes. It depends on the scope and whether safe access, required exits, utilities, and daily operations can be maintained throughout the work.
Occupied construction requires more than moving crews to nights or weekends. The plan may need to address temporary barriers, dust and noise control, customer and employee routes, deliveries, utility shutdowns, security, and communication with neighboring tenants.
This is an area where Kugel’s planning and coordination make a practical difference. One commercial remodel client described how the team scheduled disruptive work around clinic operations, asking when surgery was taking place so machinery wouldn’t run at the wrong time.
The goal isn’t to promise zero disruption. It’s to understand what the business can’t compromise, then build the phasing and communication plan around it.
When should you involve a commercial general contractor?
Bring your contractor in while you still have options—ideally while you’re comparing spaces, negotiating construction responsibilities, or developing the preliminary layout.
An experienced commercial GC can help evaluate constructability, building systems, phasing, preliminary scope, and budget risks. That input becomes less useful after the lease, design, equipment package, and opening date are fixed.
Look beyond the initial price. Kugel’s guide to choosing a commercial general contractor explains what to evaluate in a partner responsible for cost, schedule, quality, and daily coordination.
Frequently asked questions
Who pays for tenant improvements?
It depends on the lease. A landlord may provide an allowance, complete an agreed portion of the work, or deliver the space in a defined condition. The tenant may be responsible for costs beyond that contribution. Put the scope, exclusions, approvals, and payment process in writing.
Do tenant improvements require a building permit?
Many do, particularly when they involve layout, structural, mechanical, electrical, plumbing, accessibility, life-safety, or occupancy changes. Requirements vary by jurisdiction and scope, so confirm the permit path for the specific property.
What’s the difference between a tenant improvement and a commercial remodel?
A tenant improvement adapts leased space for a tenant’s use. A commercial remodel is a broader term for changing an existing business or commercial property, whether the space is leased or owner-occupied. The construction scopes can overlap substantially.
Should I sign a lease before choosing a contractor?
You don’t necessarily need a final contractor agreement before signing, but getting qualified construction input early can help uncover scope, infrastructure, and schedule risks while you still have negotiating leverage.
Make the building fit the business
A successful tenant improvement doesn’t simply look finished. It supports the operation, meets the applicable requirements, protects the opening plan, and gives the tenant or property owner confidence that the work was done right.
Kugel Construction plans and delivers commercial remodels and tenant improvements throughout the I-5 corridor from Portland to Seattle. If you’re evaluating a space or preparing to improve an existing building, start a conversation with Kugel before the major decisions are locked in.
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