Tenant Improvement Construction: The Short-Schedule Specialty That Fills the Gaps Between Major Projects
Tenant improvement — building out interior space for new or relocating tenants within existing buildings — is its own construction specialty. The scope is typically smaller than ground-up work (though TI projects can be substantial on full-floor or multi-floor buildouts), the schedule is shorter, the coordination involves landlords and adjacent occupied space, and the financial structure with tenant allowances creates dynamics not found in ordinary commercial construction.
Contractors who specialize in TI develop specific competencies — fast mobilization, coordination with occupied buildings, landlord relationships, tenant-specific design responsiveness. Contractors who approach TI as miniature commercial construction often struggle with the pace and coordination. This post covers what makes TI distinct and how to execute it well.
TI scope varies but generally includes:
Typical TI scope
- Interior partitions — walls, doors, glazing
- Ceilings — acoustical tile, gypsum, specialty
- Flooring — carpet, LVT, tile, polished concrete
- Paint and wall finishes
- MEP modifications — HVAC zones, plumbing for break rooms/bathrooms, electrical and data
- Millwork and cabinetry
- Conference rooms, AV integration
- Signage and wayfinding
- FF&E coordination with tenant's installers
The specific scope depends on the space's starting condition (cold shell, warm shell, previously occupied) and the tenant's requirements. Range is substantial — a simple repaint and carpet job to a complete gut and buildout of multiple floors.
Starting condition matters enormously:
Starting condition categories
- Cold shell — bare space, often no MEP distribution, essentially unfinished
- Warm shell — basic MEP and ceiling, some distribution, ready for partition work
- Previously occupied — existing partitions, MEP, finishes; may need demo before buildout
- Spec suite — pre-built generic space ready for minor customization
Cold shell buildout is essentially small commercial construction with MEP from scratch. Warm shell is more typical TI. Previously occupied space adds demolition and disposal to scope. Spec suites are often quick cosmetic adaptations.
The work letter defines who does what:
Typical work letter division
- Landlord work — typically shell-level items (HVAC trunks, electrical service, elevators, common areas)
- Tenant work — typically space-specific items (partitions, finishes, tenant-specific MEP)
- Some items negotiable — demising walls, utility capacity, base building upgrades
- Work letter document defines split specifically
- Changes to work letter require amendment
Understanding the work letter prevents confusion about scope. A tenant's GC doing landlord-scope work typically has to invoice the landlord separately; a tenant GC doing what's clearly tenant-scope has to absorb those costs.
Most TI projects involve tenant allowance:
Tenant allowance dynamics
- Landlord provides allowance — dollars per square foot or total amount
- Tenant typically exceeds allowance and pays the overage
- Allowance paid by landlord after completion typically
- Documentation requirements for allowance payment (lien waivers, sign-offs)
- Cash flow implications — contractor paid on allowance schedule
- Mid-project allowance disputes possible
TI contractors' cash flow depends on allowance payment timing from landlord. A contractor expecting landlord payment at substantial completion but experiencing 60-day delays has cash flow problems. Understanding allowance payment mechanics before starting work prevents surprises.
TI schedules are typically aggressive:
Typical TI schedule characteristics
- 4-8 week schedules common
- Tenant's lease commencement drives completion date
- Delays have direct financial consequence for tenant (double rent)
- No time for long lead items unless pre-purchased
- Parallel work across trades essential
- Weekend and overnight work sometimes required
TI schedule compression demands specific operational capability. Contractors geared up for 12-month commercial schedules struggle with 8-week TI schedules. The mobilization-to-completion pace is faster; decisions need to happen faster; coordination has to be tighter.
Missed TI completion dates have real consequence — tenant may be paying double rent (old space plus new) until they can occupy. Landlords and tenants remember contractors who hit dates under pressure; they also remember those who didn't.
TI usually happens in occupied buildings:
Occupied building coordination
- Work hours may be restricted (noisy work during evenings/weekends)
- Delivery access through freight elevators or dock
- Debris removal through specific routes
- Building management approvals for work types
- Coordination with other occupants
- Fire system work requires outage coordination
- HVAC modifications affect building systems
- Vibration and dust control in sensitive environments
Coordinating work around occupied tenants is a major operational difference from ground-up work. A building with a law firm on the floor above and a medical office below the buildout requires careful noise, dust, and schedule management.
TI projects have constant changes:
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TI change order patterns
- Tenants change their minds frequently
- Design evolves during construction
- Hidden conditions in existing space
- Finishes selected late, changed late
- IT and AV requirements developed with tenant IT team
- FF&E coordination creates construction changes
Change order management is core TI skill. Contractors who resist changes create friction; those who embrace changes with disciplined change order processing (fast pricing, documentation, approval) keep the project moving while capturing proper compensation.
MEP work in TI has specific challenges:
TI MEP considerations
- Tying into existing systems — conditions not fully documented
- Verifying capacity of existing service
- Fire protection sprinkler modifications
- HVAC zoning for tenant's needs
- Electrical panel capacity
- Data cable routing to IT closet
- AV infrastructure requirements
- Low voltage integration
MEP in TI is often more complex than equivalent new construction MEP because of the tie-ins and existing-condition uncertainty. An electrical contractor adding loads to existing panels needs to verify capacity and service adequacy.
TI permitting has specific timing:
TI permit considerations
- Building permit required for most TI work
- Expedited permits sometimes available for small scope
- Existing building code applies — often different from new construction
- Life safety compliance for new occupancy
- Accessibility upgrade triggers on specific project sizes
- Inspection timing aligned with construction
Permit timing affects schedule directly. Jurisdictions with fast TI permit turnaround support TI market activity; slower jurisdictions push schedule risk onto contractors. Relationships with permit expediters help in slower jurisdictions.
TI projects end with move-in:
Move-in coordination
- Final inspection and certificate of occupancy
- Punch list completion
- Tenant move coordination with moving company
- IT infrastructure activation
- Security system activation
- FF&E installation timing
- Final cleaning
- Handover package including warranties
Move-in is operational focus at the end of TI. A contractor handing off punch list items while the tenant's movers are bringing furniture creates chaos. Coordinating move-in around substantial completion is TI-specific operational skill.
TI is a distinct market segment:
TI market dynamics
- Volume work — many smaller projects rather than few big ones
- Repeat clients — landlords, tenants, brokers
- Network effects — broker referrals drive work
- Specialty firms focused only on TI
- Some large GCs have dedicated TI divisions
- Lower per-project profit but higher volume
TI-focused firms develop specific operational capabilities and client relationships. Generalist commercial contractors often can't run TI profitably because their cost structure is designed for larger projects with longer schedules.
Tenant improvement construction is a distinct specialty within commercial construction. Short schedules, occupied building coordination, landlord allowance mechanics, constant change orders, and MEP tie-in complexity create operational dynamics different from ground-up work. Contractors who specialize in TI develop the specific capabilities — fast mobilization, change order discipline, occupied building coordination, landlord relationships, tenant responsiveness — that make TI profitable. Contractors who treat TI as small commercial construction typically lose money on the mismatch. For firms deciding whether to pursue TI, the decision depends on whether the cost structure, team capability, and client relationships match what the market requires. Done well, TI produces steady volume at reasonable margin; done poorly, it drains resources that would be more productively deployed on larger projects.
Written by
Marcus Reyes
Construction Industry Lead
Spent twelve years running AP at a $120M general contractor before joining Covinly. Lives in the world of AIA G702/G703, retainage schedules, and lien waiver deadlines. Writes about the construction-specific workflows that generic AP tools get wrong.
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