Commercial & Legal 9 min read • Oct 6, 2026

Commercial Tenant Improvement (TI) Permitting & Buildout Timelines

General contractor roadmap for commercial interior buildouts in Texas. Plan review stages in Houston, Dallas, Fort Worth, and Austin, landlord work letters, MEP rough-ins, and Certificate of Occupancy (CO).

Delivering commercial interior tenant improvements on schedule requires navigating municipal bureaucracy, managing landlord property regulations, and orchestrating MEP subcontractors without delay.

Standard 16-Week Commercial TI Roadmap

WeeksProject MilestoneKey Subcontractors Involved
Weeks 1 – 3Space Demolition & Wall LayoutDemolition, Metal Stud Framing
Weeks 4 – 7MEP Overhead & In-Wall Rough-InsHVAC Ducting, Commercial Electric, Plumbing
Week 8Municipal Overhead InspectionsCity Building / MEP Inspectors
Weeks 9 – 11Insulation, Drywall Hang, Tape & FloatDrywall Crews, Firestopping Subcontractors
Weeks 12 – 14Ceilings, Paint, Tile & MillworkCommercial Painters, ACT Grid, Flooring
Weeks 15 – 16MEP Trim-Out, Life Safety & Final CO WalkFire Alarm, Fire Marshal, City Building Official

The Importance of the Fire Marshal Walk

The local Fire Marshal has unilateral authority to halt occupancy. Ensure all emergency exit signs illuminate on battery backup for 90 minutes, fire alarm horn-strobes synchronize, and exit pathways maintain clear egress widths before booking your final inspection.

Frequently Asked Questions

How long does commercial TI permitting take in Texas cities?

Plan review times vary widely by city: City of Houston typically takes 4 to 8 weeks; City of Dallas takes 6 to 12 weeks; City of Austin can take 8 to 16+ weeks for commercial review unless expedited plan review (commercial fast-track) is purchased.

What is a tenant improvement work letter?

A work letter is an addendum to the commercial lease that legally specifies whether the landlord or tenant is responsible for the buildout, defines the Tenant Improvement Allowance (TIA) dollar amount, and sets key construction milestone penalty dates.

What inspections are required to receive a commercial Certificate of Occupancy (CO)?

Final building, final mechanical (HVAC test and balance), final plumbing (backflow tests), final electrical, TAS accessibility inspection, and City Fire Marshal inspection (fire alarms, sprinkler flow, egress signage, emergency lights).

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