Commercial Tenant Improvement Electrical Contractor (Missoula, MT)

Residential Electric Interior

Commercial Tenant Improvement Electrical Done Right — On Schedule, Code Compliant, Built to Last.

If you’re improving, remodeling, or reconfiguring a commercial space, you need an electrical contractor who can keep pace with the project, coordinate well with other trades, and deliver clean work that passes inspection without surprises.

Marrow Electric provides commercial tenant improvement electrical services for property managers, general contractors, and business owners who want the job done right the first time, with clear communication, reliable scheduling, and high-quality workmanship.

Commercial TI electrical services include:

  • Office, retail, and light industrial tenant improvements
  • Electrical layout changes, circuit additions, and panel modifications
  • Lighting upgrades, controls, and energy-efficient retrofits
  • Exit and emergency lighting compliance
  • Dedicated circuits for IT, Point of Sale, and specialized equipment
  • Clean rough-in, organized trim-out, and inspection-ready installation

Request a walkthrough / estimate | Call for commercial scheduling


busy bar with people talking lots of lights hanging from the ceiling

Who We Help

Tenant improvement projects go smoother when the electrician is organized, proactive, and easy to work with. We regularly support:

  • General contractors managing TI schedules and inspections
  • Property managers coordinating turnovers and upgrades
  • Business owners moving into or remodeling leased space
  • Brokers and landlords preparing spaces for occupancy (Spec Suites)
  • Facilities teams improving tenant areas without disruption

If you’re looking for a contractor who takes pride in their work, communicates clearly, and keeps projects moving—you’re in the right place.


woman brushing her teeth in a bathroom with poor lighting

Tenant Improvement Electrical Services We Provide

Every TI project is different. TJ Marrow has worked in the commercial sector for over 20 years and has extensive knowledge of common problems, difficult coordination, and the scheduling challenges that go into every tenant improvement. Here’s how we help:

Electrical Planning & Layout Changes

  • Reworking circuits to match new floor plans
  • Adding outlets, switches, and new circuits
  • Dedicated circuits for tenant equipment and IT
  • Clean labeling and documentation for future maintenance

Panel & Service Modifications

  • Panel changes and circuit additions
  • Service upgrades and metering when required by new tenant demand
  • Load calculations and planning for future growth

Lighting & Controls

  • New lighting installation or retrofits
  • LED conversions and energy-efficient upgrades
  • Lighting controls and occupancy sensors
  • Task lighting, accent lighting, and practical design support

Code & Safety Compliance

  • Exit and emergency lighting requirements
  • Grounding and bonding
  • GFCI/AFCI protection where required
  • Inspection-ready workmanship and corrections support

Equipment Connections

  • HVAC / RTU feeds and connections
  • Kitchenette / breakroom power
  • Commercial appliance and specialty equipment hookups
  • Electrical prep for future expansion

family room with custom lighting couch big screen tv 2

Our Tenant Improvement Process (So Your Project Stays Clean and Predictable)

The difference between a smooth TI project and a stressful one usually comes down to communication, organization, and follow-through. Here’s how we approach TI electrical work:

1) Walkthrough & Scope Review

We review your space, plans, and requirements, identify challenges early, and clarify the scope before work begins.

2) Clear Estimate & Game Plan

You’ll get a clean scope, transparent pricing, and a plan that aligns with your schedule. No vague proposals. No guesswork.

3) Rough-In That Stays Organized

We install wiring and infrastructure efficiently, label circuits properly, and keep the jobsite safe and professional.

4) Trim-Out & Finish Work

We finish devices, lighting, controls, and connections with attention to detail—clean, reliable, and built to last.

5) Testing, Verification & Turnover

We verify operation, address punch-list items quickly, and support inspection and turnover so you can open on time.


hand testing electrical wires in massive network box

Why Commercial Clients Choose Marrow Electric

We value communication and respectful coordination with other trades. We do the job right—or we won’t do it.

Quality materials + clean installation — We install systems with reliability, longevity, and future maintenance in mind.

Inspection-ready workmanship — We build clean systems that pass inspection and reduce rework.

Communication you don’t have to chase — You’ll know what’s happening, what’s next, and what we need without repeated follow-ups.

Clean jobsite professionalism — We show up on time, respect the space, and leave things better than we found them.

Coordination-first mindset — We work well with GCs and other trades and help prevent scheduling conflicts.

Why Commercial Clients Choose Marrow Electric

We value communication and respectful coordination with other trades. We do the job right—or we won’t do it.

  • Inspection-ready workmanship — We build clean systems that pass inspection and reduce rework.
  • Communication you don’t have to chase — You’ll know what’s happening, what’s next, and what we need without repeated follow-ups.
  • Clean jobsite professionalism — We show up on time, respect the space, and leave things better than we found them.
  • Coordination-first mindset — We work well with GCs and other trades and help prevent scheduling conflicts.
  • Quality materials + clean installation — We install systems with reliability, longevity, and future maintenance in mind.

busy office with brick walls desks with people working custom lighting stairs and vaulted cieling

Common TI Project Types

We support tenant improvement electrical work for:

  • Office remodels and buildouts
  • Retail tenant improvements
  • Medical / dental tenant spaces
  • Restaurants and food service upgrades
  • Warehouses and light industrial spaces
  • Multi-tenant commercial properties

If you have plans, a timeline, or a scope you’re working from, we can help you execute it cleanly.


man sitting in a dark room with a single floor lamp

TI Electrical Problems We Help You Avoid

Tenant improvements often break down due to unreliable subcontractors or unforeseen obstacles that impact schedule and budget. We help prevent:

  • Rough-in conflicts and rework
  • Failed inspections due to code or labeling issues
  • Scope confusion and surprise change orders
  • Delays caused by poor communication
  • Sloppy work that creates maintenance headaches later

Our goal is simple: we don’t want you worrying about the electricians or the electrical system in your commercial space.


Frequently Asked Questions

Plans are helpful, but not always required. We can quote from drawings, a walkthrough, or a clear scope of work.

Yes—tenant improvements require coordination. We work directly with the GC and other trades to keep the schedule clean.

Yes, when required. We can plan work to minimize disruption to existing tenants or operations.

We keep change orders clear and documented so you don’t get surprises at the end of the job.

Absolutely. A TI isn’t complete until it’s clean, tested, and ready for turnover.


electric lights on inside a Montana residential house

Request a Walkthrough / Estimate

If your tenant improvement project needs clean workmanship, strong communication, and a contractor who takes pride in doing things right, we’d be glad to help.

Request a TI walkthrough / quote | Call Marrow Electric for commercial scheduling.