Tenant Improvement Electrical Guide

Tenant improvement projects are one of the most common sources of electrical scope creep, code violations, and unexpected cost overruns in commercial real estate. Whether you are preparing a space for a new tenant, managing a lease renewal buildout, or overseeing a full suite renovation, the electrical component of a TI project almost always turns out to be more involved than it first appears.

Property managers and commercial landlords who understand how tenant improvement electrical work actually works are better positioned to budget accurately, negotiate lease terms effectively, coordinate contractors without delays, and avoid the costly mistakes that come from treating electrical as an afterthought.

This guide covers the full scope of tenant improvement electrical work for commercial properties: what it includes, who is responsible, how the process works, and what property managers should know about code compliance, panel upgrades, and planning for future tenants. It is written from the perspective of a licensed commercial electrical contractor with direct experience in TI projects across offices, restaurants, retail spaces, and industrial facilities throughout Los Angeles County.

What Is Tenant Improvement Electrical Work?

Tenant improvement electrical work, often called TI electrical or commercial buildout electrical, refers to the electrical modifications and installations made to a commercial space to suit the specific needs of an incoming or renewing tenant. It is distinct from routine electrical maintenance, which addresses existing systems, and from base building electrical work, which covers the shared infrastructure of the property.

TI electrical work is triggered by a change in tenant, a change in use, or a significant upgrade to the space. It can range from adding a handful of dedicated circuits and updating lighting fixtures in a small office suite to a complete electrical system rebuild for a restaurant tenant moving into a former retail space.

The scope of a TI electrical project is shaped by three factors: the current state of the space’s electrical infrastructure, the requirements of the incoming tenant’s business operations, and the requirements of California’s building and electrical codes. A qualified commercial electrician should be involved in the scoping process before lease terms are finalized, not after.

Who Is Responsible for TI Electrical Work: Landlord or Tenant?

This is one of the most common sources of confusion in commercial leasing, and the answer depends entirely on how your lease is structured. There is no universal default.

Landlord Work vs. Tenant Work

Landlord work refers to improvements the building owner agrees to complete before or during tenant occupancy, typically at the landlord’s expense or credited against a tenant improvement allowance. This often includes base building electrical: service panels, main distribution, and common area systems.

Tenant work refers to improvements the tenant is responsible for, usually funded through a TI allowance provided by the landlord and supplemented by the tenant as needed. This typically includes the fit-out of the specific suite: lighting layouts, circuit configurations, dedicated equipment circuits, and any specialty electrical required for the tenant’s specific operations.

Tenant Improvement Allowances and Electrical Scope

When negotiating a TI allowance, property managers and tenants should specifically address the electrical scope in writing. Disputes over who is responsible for panel upgrades, service capacity improvements, or code compliance updates are common and expensive when left unresolved. The clearer the lease language is about what constitutes base building electrical versus tenant electrical, the smoother the buildout will be for everyone involved.

What Tenant Improvement Electrical Projects Typically Include

The specific scope of a TI electrical project varies by space type and tenant requirements. Here is a breakdown of the most common elements.

1. Panel Capacity Assessment and Upgrades

Before any tenant improvement work begins, the existing electrical panel serving the space needs to be assessed for available capacity. Many older commercial buildings have panels that were sized for a previous tenant’s lighter electrical load. A restaurant moving into a former retail space, for example, will require significantly more power than the previous occupant. A commercial panel upgrade is one of the most common requirements in TI projects and one of the most frequently underestimated in terms of both cost and schedule impact.

2. Lighting Systems and LED Upgrades

Commercial lighting is almost always addressed during a tenant improvement project. Incoming tenants typically have specific lighting requirements based on their business use, and California’s Title 24 energy efficiency standards require lighting systems to meet current code regardless of whether the space has been recently updated. Most TI projects include a full lighting redesign with commercial lighting services that incorporate LED fixtures, occupancy sensors, and daylight controls to meet Title 24 compliance and reduce ongoing energy costs.

3. Dedicated Circuits for Commercial Equipment

Every tenant has equipment with specific power requirements. Office spaces need dedicated circuits for server rooms, copiers, and high-load workstations. Restaurants require dedicated circuits for commercial ovens, hood exhaust systems, refrigeration units, walk-in coolers, and dishwashers. Retail spaces need circuits for signage, POS systems, and fitting room lighting. Each of these requires careful load calculation and proper circuit sizing to operate safely and comply with code.

4. Data, Low-Voltage, and AV Infrastructure

While low-voltage cabling is technically separate from the licensed electrical scope, the power infrastructure for data rooms, server closets, AV systems, security cameras, and access control panels is always part of the TI electrical scope. Proper conduit routing, dedicated circuits, and isolated grounding for sensitive electronic equipment need to be planned alongside the broader electrical layout from the beginning.

5. GFCI and AFCI Protection Upgrades

California’s adoption of recent NEC code cycles has expanded the areas of commercial buildings where GFCI and AFCI protection is required. TI projects that trigger a permit frequently require these protection devices to be installed or upgraded in the affected space, even if the rest of the building has not been brought up to current code. A licensed electrician will identify these requirements during the planning phase so they are included in the project budget, not discovered during inspection.

6. EV Charging Infrastructure

As California’s EV adoption accelerates, commercial tenants with employee parking or customer parking are increasingly requesting EV charging as part of their buildout. Adding commercial EV charging station installation to a TI project is most cost-effective when done alongside other electrical work, since conduit runs and panel capacity assessments are already part of the scope.

TI Electrical Scope by Space Type

The table below summarizes typical electrical scope, panel upgrade likelihood, and key code considerations by tenant type. Use this as a planning reference when evaluating TI budgets.

The Tenant Improvement Electrical Process: Step by Step

Understanding the TI electrical process from start to finish helps property managers build realistic timelines and avoid the most common project delays.

Step 1. Pre-lease electrical assessment. Before lease terms are finalized, a licensed commercial electrician evaluates the space’s existing electrical infrastructure: panel condition and available capacity, the condition of existing wiring, lighting system age and compliance, and the gap between current infrastructure and the incoming tenant’s requirements. This assessment prevents surprises and gives both parties the information they need to negotiate a clear TI scope.

Step 2. Scope development and bid. Based on the assessment and the tenant’s stated requirements, the electrical contractor develops a detailed scope of work and provides a written bid. For projects requiring a panel upgrade or significant infrastructure changes, this stage should be completed before the tenant finalizes their own contractor selection for other trades, since electrical scope often influences the schedule and sequencing of other work.

Step 3. Permit application. All commercial electrical work in California requires a permit. The permit application includes electrical plans, load calculations, and a description of the scope. Permit timelines vary by jurisdiction. In Los Angeles County, standard commercial permits typically take two to four weeks. Projects requiring plan check review can take longer. Starting the permit process immediately after scope is agreed upon is critical for keeping the project on schedule.

Step 4. Rough-in work. The first phase of on-site electrical work involves installing conduit, pulling wire, and installing panel components and junction boxes before walls are closed. Coordinating rough-in timing with the general contractor and other trades is essential. Electrical rough-in typically needs to be completed before insulation and drywall, but after framing.

Step 5. Rough-in inspection. The local building department inspects the rough-in work before walls are closed. This inspection verifies that all wiring, conduit, and panel work meets code requirements. Failing a rough-in inspection delays the project, so working with a licensed electrician who knows local code requirements is critical.

Step 6. Trim-out and device installation. After drywall and painting are complete, the electrician returns to install outlets, switches, lighting fixtures, panel breakers, and any specialized devices. This phase also includes the installation of any specialized equipment: EV charger hardware, generator transfer switches, or commercial lighting control systems.

Step 7. Final inspection and sign-off. The final inspection verifies that all completed work meets the approved plans and code requirements. After sign-off, the certificate of occupancy or certificate of completion can be issued, allowing the tenant to open for business.

Common Tenant Improvement Scenarios by Property Type

The specific electrical challenges of a TI project differ significantly depending on the type of commercial space involved. Here is what property managers should expect in the most common scenarios.

1. Office Buildouts

Modern office tenants typically require more electrical capacity than the space may have been designed to support, particularly if the space was built before widespread adoption of high-density workstation arrangements, dedicated server infrastructure, or electric vehicle charging. Common office TI electrical scope includes: sub-panel upgrades, reconfigured branch circuits for open-plan or private office layouts, data room dedicated power, enhanced lighting with occupancy controls for Title 24 compliance, and emergency egress lighting. Our office electrical services team handles the full scope of office TI electrical work from permit to final inspection.

2. Restaurant and Food Service Buildouts

Restaurant TI projects consistently produce the largest electrical scope of any commercial tenant type. A restaurant moving into a former retail space typically requires a complete electrical system rebuild for the kitchen area. High-demand equipment, three-phase power requirements for some commercial appliances, health department compliance requirements for refrigeration, and the need for GFCI protection throughout wet areas all contribute to a scope that can rival the restaurant’s entire construction budget if not planned carefully.

Property managers leasing to restaurant tenants should require an electrical capacity analysis before lease signing and make panel upgrade responsibility explicit in the lease. Saiyan Electric’s team provides restaurant electrical services across Los Angeles County with deep experience in the specific code requirements and equipment demands of commercial food service operations.

3. Retail Center Buildouts

Retail TI electrical scope varies widely depending on the tenant type, from a small boutique requiring little more than lighting updates and a few additional circuits to a full-service salon or fitness studio requiring significant electrical capacity for specialty equipment. Title 24 lighting compliance is a nearly universal requirement in retail TI projects, and property managers should budget for lighting control upgrades in older spaces. Our retail center electrical services team regularly handles retail TI projects of all scales.

4. Industrial and Warehouse Tenants

Industrial and warehouse TI projects can involve some of the most technically demanding electrical work in the commercial sector. Three-phase power distribution, high-amperage circuit installation for manufacturing equipment, compressed air system wiring, and high-bay lighting are all common requirements. Load analysis for industrial tenants is particularly critical, since equipment specifications often change between lease signing and buildout completion.

Our team provides industrial warehouse electrical services throughout Southern California, including three-phase panel installations, motor control wiring, and large-scale lighting retrofits for warehouse and manufacturing environments.

Electrical Code Compliance in Tenant Improvement Projects

Code compliance is the area where TI electrical projects most frequently run into trouble, especially when property managers or tenants attempt to minimize electrical scope to control costs. Here is what you need to understand about how California electrical code applies to TI projects.

When Does a TI Project Trigger Code Compliance Updates?

In California, any permitted electrical work creates an obligation to bring the affected area into compliance with the current code. This means that a tenant improvement permit does not simply cover the new work you are adding. It also requires that existing conditions in the permit scope area that do not meet current code be corrected.

This is frequently a source of surprise costs on TI projects involving older buildings. A tenant moving into a 1985 office building may find that the permit for their lighting upgrade also requires the installation of AFCI protection on certain circuits, the correction of grounding deficiencies, and the addition of tamper-resistant receptacles, none of which were anticipated in the original bid.

California Title 24 Lighting Requirements

California’s Title 24 energy efficiency standards impose specific requirements on commercial lighting systems that are more stringent than the national baseline. Any TI project that involves new or relocated lighting must demonstrate compliance with Title 24. This includes requirements for lighting power density, occupancy sensors in most commercial spaces, daylight controls in spaces with adequate natural light, and automatic shut-off controls throughout the building.

Title 24 compliance is not optional, and it is verified during the final inspection. Building it into the lighting scope from the beginning is far less expensive than redesigning a lighting system that has already been installed.

Permits and the Authority Having Jurisdiction

All commercial electrical work in California must be permitted and inspected by the Authority Having Jurisdiction (AHJ), which is typically the local city or county building department. Work performed without a permit exposes the property owner to code enforcement action, creates liability in the event of a fire or injury, and complicates property transactions when unpermitted work is discovered during due diligence.

Every tenant improvement electrical project Saiyan Electric manages is fully permitted. We handle the permit application and plan check process, coordinate inspection scheduling, and provide documentation that the completed work has been inspected and signed off. Our electrical safety inspection services are also available to evaluate existing conditions before a TI project begins.

Electrical Panel Upgrades During Tenant Improvements

Panel upgrades are the single most impactful and most frequently underestimated element of tenant improvement electrical projects. Understanding when they are required and what the process involves helps property managers plan and budget more accurately.

When Is a Panel Upgrade Required?

A panel upgrade is required when the incoming tenant’s electrical demand exceeds the available capacity of the existing panel serving their space. This is determined by a load calculation that accounts for all existing loads and all loads the new tenant intends to add. If the total demand approaches or exceeds the panel’s rated capacity, an upgrade is required before any additional circuits can be added.

A panel upgrade may also be required if the existing panel has reached the end of its useful life, uses a make or model identified as a safety hazard (Federal Pacific and Zinsco panels are common examples), or if the physical panel does not have sufficient space for the additional breakers required by the new tenant’s circuit configuration.

What a Commercial Panel Upgrade Involves

A commercial panel upgrade for a tenant improvement project typically involves replacing the existing distribution panel with a higher-capacity unit, coordinating with the utility for any service entrance upgrades, installing new subpanels in appropriate locations to serve the new layout, and ensuring all panel work is permitted and inspected. In some cases, a service entrance upgrade with the utility is also required, which adds its own timeline and coordination requirements separate from the electrical contractor’s schedule.

Property managers should plan for panel upgrades to add two to four weeks to a TI project schedule, depending on panel lead times and utility coordination requirements. Starting the panel upgrade process early, ideally before the general contractor begins other trades, is the most effective way to prevent it from becoming the critical path item that delays occupancy.

Planning Electrical for Lease Renewals and Tenant Turnovers

Tenant turnover is the natural rhythm of commercial property management, and it creates recurring opportunities to address electrical deficiencies, update aging systems, and position the space competitively for the next tenant. Property managers who are proactive about electrical planning during turnover reduce per-tenant buildout costs and carry less deferred maintenance liability on their portfolio.

Between-Tenant Electrical Assessment

When a tenant vacates, the space should be assessed for electrical conditions before it is listed for lease or shown to prospective tenants. This assessment should identify any unpermitted electrical work the departing tenant may have installed, the current state of the panel and circuits, lighting system condition and Title 24 compliance, and any conditions that would require correction under a new permit. A commercial electrical safety inspection at turnover gives property managers documented knowledge of exactly what they have to offer and what any incoming tenant can expect to spend on buildout.

Improving Lease Velocity with Electrical Upgrades

Spaces with upgraded electrical infrastructure lease faster and with more favorable terms. A space that has already been brought to current code, has a modern panel with available capacity, and features compliant LED lighting with occupancy controls presents a lower total cost of occupancy for prospective tenants. That translates directly to a shorter lease-up timeline and better lease economics for the property owner.

Common between-tenant improvements that have a measurable impact on lease velocity include: panel upgrades to current capacity, LED lighting retrofits with Title 24 controls, GFCI and AFCI protection upgrades in affected areas, and correction of any code violations from the previous tenant’s occupancy.

Protecting the Property with Ongoing Maintenance

Between active tenant improvement projects, the electrical infrastructure of your commercial property needs ongoing care. Regular inspections, thermal scanning, and preventive maintenance extend the life of your electrical systems and reduce the likelihood of unexpected failures that affect occupied tenants. Our commercial electrical maintenance and electrical troubleshooting services are available to property managers throughout Los Angeles County on both a scheduled and on-call basis.

Why Choose Saiyan Electric for Tenant Improvement Electrical Projects

Saiyan Electric is a licensed, bonded, and insured commercial electrical contractor based in Downey, CA. Our team has direct experience managing tenant improvement electrical services across a wide range of commercial property types, from small office suites to full-floor restaurant buildouts and industrial facilities throughout Los Angeles County and Orange County.

What makes us the right choice for property managers:

• Full-scope commercial capabilities. We handle TI projects from initial assessment through final inspection sign-off, including panel upgrades, lighting systems, dedicated equipment circuits, EV charging infrastructure, and generator connections. Property managers work with a single contractor for the complete electrical scope.
• Dedicated property management expertise. Our property management electrical contractor team understands the communication, documentation, and coordination requirements that property managers need from their contractors. We provide clear scope documentation, timely updates, and responsive service throughout the project.
• Honest pricing and no hidden costs. We provide detailed written estimates before work begins. What we quote is what you pay, with change orders documented and approved before any additional work is performed.
• 3-year warranty on parts and labor. Our industry-leading warranty gives property owners and their tenants the assurance that the electrical work is backed by the contractor who installed it.
• Christian values and integrity. We operate honestly in every interaction, from the initial estimate to the final walk-through. Property managers who have worked with us consistently cite our reliability and transparency as defining characteristics of the relationship.
• Serving all of Southern California. Saiyan Electric provides commercial TI electrical services throughout Downey, Norwalk, Long Beach, Torrance, Los Angeles, Carson, Compton, Whittier, and all surrounding communities in Los Angeles County and Orange County.

Frequently Asked Questions: Tenant Improvement Electrical Work

What is included in tenant improvement electrical work?

Tenant improvement electrical work covers all electrical modifications made to a commercial space to suit a specific tenant’s requirements. This typically includes panel capacity assessments and upgrades, branch circuit additions and reconfiguration, lighting system installation or upgrades to meet Title 24, dedicated circuits for commercial equipment, GFCI and AFCI protection updates, and any specialty electrical required by the tenant’s operations. The exact scope depends on the space type, the tenant’s business, and the current state of the building’s electrical infrastructure.

How much does tenant improvement electrical work cost?

TI electrical costs vary widely based on scope, space size, and existing infrastructure conditions. A simple office suite refresh with lighting updates and a few additional circuits might cost $3,000 to $8,000. A full restaurant buildout in a former retail space can run $40,000 to $100,000 or more when panel upgrades, three-phase power distribution, and code compliance work are included. Saiyan Electric provides detailed written estimates for every project. Contact us for a free assessment specific to your property.

Who pays for electrical panel upgrades during a tenant improvement project?

Responsibility for panel upgrade costs is determined by lease language. In many cases, panel upgrades that increase the long-term asset value of the building are negotiated as landlord work or funded through the TI allowance with landlord contribution. When lease terms do not address this clearly, disputes are common. Property managers should ensure lease language explicitly addresses panel upgrade responsibility before the lease is executed.

Does all tenant improvement electrical work require a permit in California?

Yes. All commercial electrical work in California requires a permit and inspection by the local building department, regardless of the scope. There is no minimum threshold below which a permit is not required for commercial electrical work. Unpermitted electrical work creates liability for property owners, complicates property transactions, and can trigger code enforcement action. Every Saiyan Electric TI project is fully permitted and inspected.

How long does a typical TI electrical project take?

Timeline depends heavily on scope and permit lead time. A standard office TI electrical project typically takes two to four weeks from permit issuance through final inspection. Projects involving panel upgrades, utility coordination, or complex rough-in work may take four to eight weeks. Building permit lead time into the overall TI schedule from the beginning of the project is the most effective way to prevent electrical from becoming the critical path delay.

Can Saiyan Electric handle TI electrical projects that also require EV charging or generator installation?

Yes. Saiyan Electric provides full-scope commercial electrical services including commercial EV charging station installation, commercial generator installation, and panel upgrades as part of tenant improvement projects. Coordinating these elements with a single contractor is more efficient and cost-effective than managing multiple electrical subcontractors on the same project.

What areas does Saiyan Electric serve for commercial tenant improvement electrical projects?

Saiyan Electric serves commercial properties throughout Los Angeles County and Orange County, including Downey, Norwalk, Long Beach, Torrance, Carson, Compton, Los Angeles, Whittier, Pico Rivera, South Gate, Paramount, Bellflower, and all surrounding communities. Contact us to confirm service availability for your specific property location.