Commercial Tenant Improvement Build-Out Guide | Projul

Commercial tenant improvement build-outs are bread-and-butter work for a lot of general contractors, and for good reason. The projects are steady, the relationships with landlords and property managers can turn into repeat business, and the margins are solid when you run them right. But TI work has its own rhythm that is different from ground-up construction or residential remodeling, and contractors who treat it the same way often end up bleeding money on change orders, schedule delays, and coordination headaches.

I have seen contractors lose thousands on TI jobs simply because they skipped a proper site walkthrough or failed to nail down who was paying for what before signing a contract. This guide covers the full process from pre-construction planning through final punch list so you can run these projects profitably and build a reputation that keeps the phone ringing.

Understanding the Tenant Improvement Landscape

Before you chase your first TI project, you need to understand the players involved and how money flows. Unlike a typical residential job where you are working directly with the homeowner, TI projects often involve three or more parties: the tenant (who will occupy the space), the landlord or property management company (who owns the building), and sometimes a broker or project manager representing one side or the other.

The lease agreement between the landlord and tenant usually dictates the TI allowance, which is the dollar amount the landlord contributes toward build-out costs. This number is expressed as a price per square foot, and it varies wildly depending on the market, the building class, and how badly the landlord wants that tenant. In a hot market, you might see $50 to $80 per square foot for a Class A office space. In a secondary market or older building, $15 to $30 is more common.

Your job as the contractor is to deliver the build-out within that budget or clearly communicate what the overages will be before you start swinging hammers. The fastest way to lose a commercial client is to surprise them with costs they did not agree to.

There are generally three types of TI build-outs you will encounter:

• Cosmetic or “vanilla shell” finish-outs where the space already has basic infrastructure and you are adding finishes like paint, flooring, lighting, and maybe some minor partition walls
• Moderate build-outs that involve reconfiguring the layout with new framing, updated electrical and data, some plumbing, and ceiling work
• Full gut renovations where you strip everything back to the shell and start fresh with all new mechanical, electrical, plumbing, and finishes

Each type requires a different approach to estimating, scheduling, and subcontractor coordination. If you are looking to sharpen your estimating process for these projects, our guide on construction estimating accuracy covers the fundamentals that apply directly to TI work.

Pre-Construction Planning and Site Assessment

The pre-construction phase makes or breaks a TI project. Skip steps here and you will pay for it later with delays, change orders, and frustrated clients.

Start with a thorough site walkthrough. Do not rely on floor plans alone. Walk the actual space with your project manager and key subcontractors. Look above the ceiling tiles. Check the condition of existing HVAC equipment. Document the electrical panel capacity and note how many circuits are available. Test the plumbing and confirm the location and size of the main lines. Take photos of everything.

Here is what you need to document during the walkthrough:

• Existing conditions of all mechanical, electrical, and plumbing systems
• Structural elements like columns, shear walls, and load-bearing walls
• Ceiling height and type (drop ceiling, exposed structure, drywall)
• Floor condition and levelness (especially important in older buildings)
• Fire protection system type and coverage
• ADA accessibility of restrooms, entries, and common areas
• Access points for deliveries and material staging
• Building hours and any restrictions on noisy work
• Asbestos or lead paint concerns in pre-1980 buildings

That last point is critical. Many commercial buildings built before 1980 contain asbestos in floor tiles, pipe insulation, or ceiling materials. If you start demo without testing and hit asbestos, you are looking at an abatement project that can add weeks and tens of thousands of dollars. Always recommend environmental testing before bidding demo work in older buildings.

Once you have your site assessment, you can put together a realistic scope of work. A solid scope of work document protects you and your client by defining exactly what is included and, just as importantly, what is not included.

Budgeting, Estimating, and Contract Structure

Getting the money side right on a TI project takes more than plugging numbers into a spreadsheet. You need to understand the contract structure, build your estimate around it, and protect your margins at every step.

Contract types in TI work usually fall into three buckets:

1. Lump sum (fixed price) where you agree to deliver the scope for a set number. This puts the risk on you but gives the client cost certainty. Your estimate needs to be tight, and your contingency needs to be realistic.
2. Cost-plus with a guaranteed maximum price (GMP) where you bill actual costs plus your markup, but the total cannot exceed a ceiling. This gives you some flexibility for unknowns while still capping the client’s exposure.
3. Cost-plus open book where the client pays actual costs plus your fee. This works well when the scope is not fully defined, but some clients are uncomfortable with the open-ended nature.

No matter which structure you use, break your estimate into clear categories. General conditions (your on-site supervision, dumpsters, temporary power, cleanup) are easy to underestimate. On a TI job, general conditions typically run 8 to 12 percent of the hard construction costs. Do not bury these or you will eat them.

For tracking costs as the project moves forward, a solid job costing system is not optional. You need to know where every dollar is going in real time so you can catch budget overruns before they get out of hand.

The TI allowance complicates things. When the landlord is funding part of the build-out, you need crystal-clear documentation of what the allowance covers. Get this in writing before you sign your contract. Common disputes include whether the allowance covers design fees, permit costs, furniture, data cabling, or signage. If the lease is vague, push for clarification before you start. You do not want to be caught in the middle of a landlord-tenant disagreement about who owes you money.

Build your estimate with line-item detail so the client can see exactly where their money is going. This transparency builds trust and makes it easier to get change orders approved when surprises come up. And in TI work, surprises always come up. You open a wall and find outdated wiring. You pull up carpet and discover a cracked slab. You start HVAC rough-in and realize the existing ductwork is undersized for the new layout.

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A contingency of 5 to 10 percent is standard. For older buildings or spaces with limited documentation, push for 10 percent. Your budget management process should account for these unknowns from day one.

Scheduling and Phasing the Build-Out

TI projects run on tight timelines. The tenant has a lease start date, and every day of construction delay is a day they are paying rent without generating revenue. That pressure flows downhill to you, so your schedule needs to be realistic, detailed, and communicated clearly to everyone involved.

Start scheduling from the move-in date and work backward. This gives you a deadline-driven schedule that accounts for every phase:

1. Design and permitting (2 to 6 weeks depending on complexity and jurisdiction)
2. Demolition and rough-in (1 to 3 weeks)
3. Framing, mechanical, electrical, and plumbing rough-in (2 to 4 weeks)
4. Inspections (schedule these early because inspector availability can add days)
5. Drywall, taping, and painting (1 to 2 weeks)
6. Flooring, ceiling grid, and finishes (1 to 2 weeks)
7. Fixture installation and final connections (1 week)
8. Punch list and final inspections (3 to 5 days)
9. Cleaning and tenant move-in prep (1 to 2 days)

The biggest scheduling mistake on TI jobs is not accounting for inspection hold points. You cannot close up walls until rough-in inspections pass. You cannot install ceiling tiles until above-ceiling MEP work is inspected and approved. Build these hold points into your schedule with buffer days, because a failed inspection can cascade through your entire timeline.

Phasing matters too, especially in occupied buildings. If the tenant is building out a suite while other tenants are operating next door, you may have restrictions on work hours, noise levels, and access. Some buildings limit construction to nights and weekends, which increases your labor costs. Factor this into both your schedule and your estimate.

A detailed construction schedule is your single best tool for keeping a TI project on track. Share it with the client, update it weekly, and use it to drive your subcontractor coordination meetings.

Subcontractor Coordination and Trade Sequencing

TI build-outs are coordination-heavy. You might have electricians, plumbers, HVAC techs, fire sprinkler crews, drywall hangers, painters, flooring installers, and ceiling grid crews all working in the same space within a few weeks. If you do not manage the sequencing, trades stack up on each other and productivity tanks.

Pre-construction meetings with subs are not optional. Before you start the job, get all your key subs in a room (or on a call) and walk through the scope, schedule, and site logistics. Cover these points:

• Work sequence and which trades need to be in and out before the next one starts
• Material staging areas and delivery schedules
• Bathroom access and break areas (especially in occupied buildings)
• Building access procedures including security badges and loading dock reservations
• Daily cleanup expectations
• Change order procedures and who has authority to approve extra work

That last point trips up a lot of GCs. On a TI project, you might have the tenant’s project manager, the landlord’s rep, and the architect all giving direction to your subs on site. If your electrician gets a verbal request from the tenant to add six outlets that were not in the plans, who pays for that? Establish a clear chain of command and make sure your subs know that no extra work happens without a written change order approved by you. Our guide on managing change orders covers this process in detail.

Trade sequencing for a typical TI build-out looks like this:

• Demo crew clears the space
• Framing goes up for new walls and soffits
• Electricians, plumbers, and HVAC techs do rough-in (coordinate carefully because they are all working in the same wall and ceiling cavities)
• Fire sprinkler crew modifies or extends the system
• Low-voltage cabling (data, phone, security) is pulled
• Rough-in inspections happen
• Insulation (if required by code for sound or thermal purposes)
• Drywall hang, tape, and finish
• Paint
• Ceiling grid and tile
• Flooring
• Millwork and casework installation
• Plumbing fixtures and electrical trim (switches, outlets, light fixtures)
• Final mechanical connections and HVAC balancing
• Final inspections
• Punch list walkthrough

The key to keeping this sequence flowing is weekly coordination meetings. Even a 15-minute standup on Monday morning where you confirm who is on site this week, what they need to accomplish, and what they need from other trades will prevent most conflicts.

Strong subcontractor management is what separates the contractors who make money on TI work from those who just stay busy.

Inspections, Compliance, and Closeout

The finish line on a TI project involves more than just completing the punch list. You need to get through final inspections, deliver proper closeout documentation, and make sure the space is ready for the tenant to occupy.

Inspections on a commercial TI project typically include:

• Rough-in inspection for electrical, plumbing, and mechanical
• Framing inspection (especially for fire-rated walls)
• Fire protection system inspection and flow test
• Above-ceiling inspection before ceiling tiles go in
• Final building inspection
• Fire marshal inspection
• Health department inspection (if the space includes a commercial kitchen or food service)
• ADA compliance verification

Start the permit process early and build relationships with your local building department. Know which inspectors cover your area and learn their preferences. Some inspectors want to see specific documentation on site. Others want photos of work that will be covered up. Asking upfront saves you from failed inspections and schedule delays.

For spaces open to the public, ADA compliance is not something you can figure out at the end. Restrooms, doorway widths, counter heights, signage, and accessible routes all need to meet current ADA standards. Our guide on ADA compliance for commercial projects breaks down the requirements you need to know.

Closeout documentation for TI projects should include:

• As-built drawings showing the final layout and any deviations from the original plans
• Mechanical, electrical, and plumbing equipment manuals and warranty information
• Fire protection system certification
• Air balancing report for the HVAC system
• Certificate of occupancy or certificate of completion
• Lien waivers from all subcontractors and suppliers
• Final billing reconciliation showing all costs against the original budget

Put together a closeout package and deliver it to both the tenant and the landlord. This level of professionalism sets you apart from competitors who just hand over the keys and send a final invoice. It also protects you legally by documenting that the work was completed per the approved plans and specifications.

The punch list walkthrough should happen with the tenant present. Walk every room with a checklist and document every item, no matter how small. Paint touch-ups, outlet cover plates that are not straight, a door that does not latch properly. Fix everything on the list before you call the job complete. The way you finish a project determines whether that client calls you for their next space.

Building a Profitable TI Practice

If you want TI work to become a reliable revenue stream, you need to think beyond individual projects and build systems that make each job more efficient than the last.

Develop relationships with property managers and commercial brokers. These people control the pipeline. When a new tenant signs a lease and needs a build-out, the property manager is usually the first person they ask for contractor recommendations. Show up on time, communicate clearly, stay on budget, and you will get the referral.

Standardize your processes. Create templates for your TI estimates, schedules, and closeout packages. Build a library of standard details for common conditions like demising walls, ADA-compliant restrooms, and open office layouts. The less time you spend reinventing the wheel on each project, the more margin you keep.

Track your numbers. Review every completed TI project and compare actual costs to your estimate. Where did you make money? Where did you lose it? Over time, this data makes your estimating sharper and your bids more competitive without sacrificing margin. A good cost tracking system gives you this visibility automatically.

Invest in technology that fits. TI projects move fast and involve a lot of coordination between your office and the field. Construction management software like Projul helps you keep schedules, budgets, change orders, and communication in one place so nothing slips through the cracks. When your project manager can update the schedule from the job site and your office can see it in real time, everyone stays aligned and the project runs smoother.

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Commercial tenant improvement work rewards contractors who are organized, communicative, and detail-oriented. The projects may not be as glamorous as a ground-up build, but they are steady, repeatable, and profitable when you run them with the right systems in place. Start with solid pre-construction planning, manage your subs and your budget carefully, and deliver a clean finished product. Do that consistently and you will build a TI practice that keeps growing year after year.