Tenant Improvement Permits: A Guide to Commercial Buildout Permitting

By Permit Place  |  Last updated: February 2026

If you are planning a commercial interior buildout, a restaurant renovation, or a retail store remodel inside a leased space, you will almost certainly need a tenant improvement permit. The term “tenant improvement” (or TI) refers to any construction work done inside a leased commercial space to make it suitable for the tenant’s use. This ranges from minor cosmetic updates to full gut renovations with new walls, electrical panels, plumbing lines, and HVAC systems.

The permitting side of TI projects catches many tenants, landlords, and general contractors off guard. Requirements differ from city to city. Timelines range from two weeks to three months. And missing a single permit type can shut down your project mid-construction.

This guide covers every aspect of TI permitting: when you need permits, what types are required, how the process works step by step, how long it takes in major cities, what it costs, and the most common mistakes that cause delays.

What Are Tenant Improvements?

Tenant improvements are modifications made to a commercial rental space to fit a specific tenant’s business needs. The industry also uses the terms “leasehold improvements,” “interior buildout,” and “TI work.” All refer to the same thing: construction inside a leased space that goes beyond basic maintenance.

Common examples of tenant improvement work include:

• Partition walls and offices: Building new walls to create private offices, conference rooms, or storage areas
• Electrical upgrades: Adding circuits, outlets, data cabling, or upgrading the electrical panel
• Plumbing additions: Installing sinks, restrooms, grease traps, or floor drains for restaurants and salons
• HVAC modifications: Rerouting ductwork, adding supplemental cooling, or installing kitchen exhaust hoods
• Fire protection upgrades: Relocating sprinkler heads, adding fire alarm devices, or installing a new suppression system
• ADA compliance work: Upgrading restrooms, doorways, ramps, and signage to meet accessibility standards
• Storefront modifications: Changing the entrance, adding or removing windows, or installing new signage

TI projects happen across every commercial property type: office buildings, retail centers, shopping malls, restaurants, medical offices, and industrial warehouses. The scope can be as small as adding a few walls in a 1,200-square-foot office or as large as a $2 million gut renovation of a 15,000-square-foot restaurant space.

When Do TI Projects Need Permits?

The short answer: almost always. Any work that changes the building’s structure, electrical system, plumbing, HVAC, or fire protection requires a permit. The only TI work that typically does not need a permit is purely cosmetic.

Work That Requires a Tenant Improvement Permit

• Building or removing interior walls (even non-load-bearing partitions)
• Any new electrical wiring, outlets, or panel work
• New or relocated plumbing fixtures
• HVAC modifications, ductwork changes, or new equipment
• Fire sprinkler head relocation or new fire alarm devices
• Changes to the ceiling grid that affect sprinkler coverage
• Installing a commercial kitchen hood and exhaust system
• Changing the occupancy classification (e.g., office to restaurant)
• ADA-related construction (restroom upgrades, ramps, door widening)
• Adding or modifying an exit path or exit signage

Work That Typically Does Not Require a Permit

• Painting walls and ceilings
• Replacing carpet or flooring with the same material type
• Installing furniture, cubicles, or shelving that is not permanently attached
• Hanging artwork or decorative items
• Minor repairs that replace existing components in kind

When in doubt, call your local building department or a permit expediter. Starting work without the right permits can result in stop-work orders, fines of $500 to $10,000 or more, and mandatory removal of unpermitted work.

Types of TI Permits

Most tenant improvement projects require multiple permits, not just one. Each building trade has its own permit, and larger projects may need five or more separate approvals running in parallel.

Building Permit (General Construction)

This is the primary permit for any TI project. It covers structural work, new walls, floor plan changes, ceiling modifications, and ADA compliance. The building department reviews architectural and structural drawings to verify code compliance. Every TI project that involves more than cosmetic work needs this permit.

Electrical Permit

Required for any new wiring, circuits, outlets, light fixtures, electrical panels, or data/communication cabling. A licensed electrical contractor must pull this permit in most jurisdictions. Plan review checks wire sizing, circuit loading, panel capacity, and code compliance per the National Electrical Code (NEC).

Plumbing Permit

Needed when adding or relocating sinks, toilets, water heaters, floor drains, grease traps, or any water/waste piping. Restaurant and salon TI projects almost always require plumbing permits. Reviewers verify pipe sizing, venting, fixture counts, and backflow prevention.

Mechanical Permit (HVAC)

Covers heating, ventilation, and air conditioning work. This includes new rooftop units, split systems, ductwork modifications, kitchen exhaust hoods, and make-up air systems. The mechanical review confirms equipment sizing, duct calculations, and ventilation rates meet the International Mechanical Code (IMC).

Fire Protection Permit

Required for sprinkler system modifications, fire alarm installations, kitchen suppression systems, and smoke control systems. The fire marshal or fire department typically reviews these plans separately from the building department. Expect this to be the longest review in the process for restaurant and assembly-use buildouts.

Additional Permits You May Need

• Health department permit: Required for restaurants, bars, and food service establishments
• Sign permit: For new exterior or interior illuminated signage
• Encroachment permit: If construction equipment or materials will occupy sidewalks or rights-of-way
• Demolition permit: For gut renovations that remove existing walls, ceilings, or fixtures
• Grading/foundation permit: Rare for TI, but needed if you are modifying the building slab

The TI Permit Process Step by Step

The permit process for tenant improvements follows a predictable sequence in most U.S. cities. Here is how it works from start to finish.

1. Pre-application research. Before designing anything, confirm the zoning allows your intended use at that address. A restaurant cannot go into every commercial space. Check the building’s occupancy type, parking requirements, and any HOA or landlord restrictions. This step takes 1 to 3 days if you know where to look, or your permit expediter can handle it.
2. Hire your design team. Engage an architect or designer to produce construction drawings. For a standard office TI, you may only need architectural plans. Restaurant and medical TI projects typically need architectural, structural, mechanical, electrical, and plumbing drawings. Budget 2 to 6 weeks for design depending on scope.
3. Prepare the permit application. Fill out the jurisdiction’s permit application forms. Gather the required documents: construction drawings, title 24 energy calculations (in California), structural calculations if applicable, contractor licenses, and the property owner’s authorization letter. Missing any document will cause a rejection at intake.
4. Submit for plan review. File the application and plans with the local building department. Most cities now accept electronic submissions. Larger jurisdictions like Los Angeles and New York City have separate submission portals for each trade permit. You will pay plan review fees at this stage.
5. Plan review period. Plan checkers from each discipline (building, electrical, plumbing, mechanical, fire) review the drawings for code compliance. This is the longest phase. Review times range from 10 days in fast cities to 90 days in slow ones. See the timeline table below for city-by-city data.
6. Respond to correction comments. Most TI projects receive correction comments after the first review. These are code compliance issues the plan checker identified. Your architect or engineer addresses each comment, revises the drawings, and resubmits. This second review (called “backcheck”) typically takes 5 to 15 business days. Complex projects may go through 3 or 4 rounds.
7. Permit issuance. Once all disciplines approve the plans, the building department issues the permit. You pay the remaining permit fees, post the permit at the job site, and construction can begin.
8. Inspections during construction. Building inspectors visit the site at required milestones: rough framing, electrical rough-in, plumbing rough-in, mechanical rough-in, insulation, drywall, and final inspection. Each inspection must pass before the next phase of work can proceed.
9. Final inspection and certificate of occupancy. After all work is complete and all inspections pass, the city issues a certificate of occupancy (or a temporary certificate of occupancy for phased projects). The tenant can now legally operate in the space.

How Long Do TI Permits Take?

Permit review timelines for tenant improvements vary by city, project complexity, and current workload at the building department. The table below shows typical first-round review times for a standard commercial TI project (office or retail, no change of use) in major U.S. cities.

Several factors push TI permit timelines longer:

• Change of occupancy: Converting an office to a restaurant or retail to medical adds weeks because more departments must review the plans
• Incomplete submissions: Missing documents or drawings that do not meet the jurisdiction’s formatting requirements trigger a rejection at intake, resetting the clock
• Fire protection changes: Any modification to sprinkler systems or fire alarms requires fire marshal review, which runs on a separate timeline
• Health department review: Food service projects need health department plan approval in addition to building department permits
• Multiple correction rounds: Each round of corrections adds 1 to 3 weeks

TI Permit Costs

Permit fees for tenant improvements are calculated differently in every jurisdiction, but most cities base fees on the project’s construction valuation. Here are the typical cost ranges.

Example: A $250,000 construction-value office TI in Phoenix might cost $2,800 for the building permit, $1,820 for plan review (65%), $350 for electrical, $250 for plumbing, $300 for mechanical, and $400 for fire sprinkler modifications. Total permit cost: roughly $5,920.

Example: The same $250,000 project in Los Angeles could run $4,200 for the building permit, $2,730 for plan review, plus trade permits and LA-specific surcharges (school fee, Green Building fee, systems development). Total in LA: $8,000 to $12,000.

Cities with higher construction costs and more complex code requirements (Los Angeles, San Francisco, New York City, Chicago) consistently have higher permit fees. Expedited or priority review programs, where available, add 50% to 200% on top of standard fees.

Common TI Permit Mistakes

After processing thousands of tenant improvement permits, we see the same mistakes cause delays on project after project. Avoiding these saves weeks.

1. Starting construction before the permit is issued

This is the most expensive mistake. Building inspectors can issue a stop-work order, fine the contractor $500 to $10,000 per violation, and require the unpermitted work to be exposed for inspection or removed entirely. In Los Angeles, working without a permit can also trigger a double-fee penalty.

2. Not checking occupancy classification early

If the existing space is classified as “B” (office) and you want to open a restaurant (“A-2” assembly), the city will require a change of occupancy review. This triggers additional requirements for parking, restrooms, accessibility, fire protection, and exhaust systems that can add months and tens of thousands of dollars to the project. Check the occupancy type before signing the lease.

3. Submitting incomplete applications

Every missing document or drawing sheet causes the application to be rejected at intake. The clock does not start until the submission is complete. Common missing items: owner authorization letter, energy calculations (Title 24 in California), structural calculations for ceiling-mounted equipment, and contractor license numbers.

4. Ignoring the fire protection scope

Moving even a single ceiling tile can affect sprinkler coverage and trigger a fire sprinkler modification permit. Many contractors plan their TI budget and timeline around the building permit and forget that fire protection runs on a separate, often slower, review track. For restaurant projects, the kitchen hood suppression system alone can take 4 to 6 weeks to get approved.

5. Not coordinating trade permits

If the electrical, plumbing, and mechanical permits are submitted weeks after the building permit, they will be approved weeks later too. Submit all trade permits at the same time as the building permit so they can be reviewed in parallel.

6. Underestimating correction rounds

Plan on at least one round of corrections. Budget two rounds for projects in strict jurisdictions like LA and NYC. Each correction round adds 5 to 25 business days depending on the city.

7. Misunderstanding who is responsible for the permit

Leases vary. Some require the tenant to pull all permits. Others make the landlord responsible. If the lease is silent, the person doing the construction work is typically responsible. Clarify this before the project starts.

TI Permits for Malls, Shopping Centers, and Multi-Tenant Retail

Mall and shopping center TI projects add layers of complexity that standalone retail locations do not have. Here is what makes them different.

Landlord design criteria

Major mall operators (Simon Property Group, Brookfield, Macerich, Westfield) publish tenant design criteria documents that are often 50 to 100+ pages. These dictate storefront design, signage size and placement, utility connection points, demising wall construction, and hours when construction is allowed. Your plans must comply with these criteria before the landlord will authorize the permit application.

Landlord authorization

The building department requires a signed authorization from the property owner (the landlord or their management company) before accepting a tenant’s permit application. Getting this signature can take 1 to 3 weeks if the landlord’s review process is slow. Plan for this in your timeline.

Common area coordination

Work that affects mall common areas (corridor ceilings, shared utility mains, fire alarm zones, storefront barricades) requires coordination with mall management. The fire alarm system in a mall is typically a building-wide network, so modifying devices in your space may require a mall-wide fire alarm impairment notification and an overnight shutdown of the system for testing.

After-hours construction requirements

Most malls require noisy work (demolition, concrete cutting, overhead work) to happen outside of operating hours. This means night shifts and weekend work, which increases construction costs by 15% to 30%. Factor this into your TI budget.

Multi-jurisdiction complexity

National retailers opening 20 or 50 stores a year in different cities face 20 or 50 different sets of permit requirements. Each city has its own codes, forms, fees, and review timelines. This is where a national permit program saves months of cumulative delay. Permit Place manages this exact scenario for brands running multi-location rollouts.

Landlord vs. Tenant: Who Is Responsible for TI Permits?

This is one of the most common sources of confusion in commercial buildouts. The answer depends on the lease agreement, but here are the general patterns.

The TI Allowance and Permits

Many commercial leases include a TI allowance: a dollar amount the landlord contributes toward the tenant’s buildout. The allowance typically ranges from $20 to $80 per square foot for office space and $40 to $150+ per square foot for restaurant space. Permit fees, design fees, and expediting fees are usually eligible expenses under the TI allowance, but read the lease carefully. Some landlords exclude “soft costs” like permits and architecture from the allowance.

If your lease includes a TI allowance, get the landlord to confirm in writing that permit fees and expediting costs are reimbursable. This question is best asked during lease negotiations, not after construction starts.

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How to Get Your TI Permit Faster

Speed matters on TI projects because every week of permit delay is a week of rent paid with no revenue. These strategies consistently reduce timelines.

• Submit complete applications. This sounds obvious, but 30% to 40% of TI permit applications are rejected at intake for missing documents. Use the jurisdiction’s checklist and verify every item before submission.
• Submit all permits simultaneously. File the building permit and all trade permits (electrical, plumbing, mechanical, fire) on the same day. Parallel review saves weeks compared to sequential filing.
• Use expedited review if available. Many cities offer a paid expedited plan check program. Los Angeles charges double fees for express plan check (15 business days vs. 30 to 60). Phoenix offers over-the-counter review for small TI projects. These programs are worth the extra cost when rent is running.
• Hire a permit expediter. A local expediter knows the plan checkers, the common correction items, and the fastest submission methods. They also handle corrections and resubmittals so your architect does not have to wait in line at the counter.
• Pre-check drawings with the city. Some jurisdictions offer pre-application meetings or informal plan review consultations. Use them. A 30-minute meeting before submission can prevent weeks of correction rounds.
• Respond to corrections immediately. When correction comments arrive, respond within 48 hours. Every day you sit on corrections is a day added to your total permit timeline. Have your architect or engineer on standby during the review period.

Frequently Asked Questions