# Commercial Tenant Improvement Timeline: Katy & Houston Metro

How long does a commercial tenant improvement actually take in Katy, Cypress, or the broader Houston metro? Most owners ask this question when they've signed a lease and need occupancy by a hard deadline—but the answer depends on permit complexity, MEP scope, and whether your GC has permits and MEP in-house or outsources them.

Our team at Tanglewood Construction coordinates architecture, mechanical/electrical/plumbing, city permits, and construction under one roof. We'll walk you through what a realistic timeline looks like, where delays hide, and how to accelerate your buildout without sacrificing quality.

What Is a Commercial Tenant Improvement (TI)?

A tenant improvement is any build-out or renovation inside an existing commercial space—grocery store fit-out, medical office buildout, retail shop-out, restaurant kitchen, or office reconfiguration. You inherit the building shell and MEP risers; your TI modifies walls, flooring, finishes, mechanical systems, electrical circuits, and plumbing to suit your business.

• Existing MEP infrastructure (Is there enough power, gas, and water for your use?)
• Permit scope (City of Katy, Houston, or other municipality)
• Tenant-friendly scheduling (Can you work during normal hours, or only nights/weekends?)
• Sub-coordination (Do your plumber, electrician, and HVAC contractor show up on time?)

A Realistic TI Timeline for Katy and Houston Metro

Pre-Construction Phase (4–8 weeks)

Before a single wall comes down, you need design, permits, and MEP sign-off. This phase is often underestimated.

Design & Documentation (2–4 weeks): Architectural drawings, electrical schematics, plumbing/HVAC plans, and finish schedules must be locked. If you're working with a design-build contractor, this overlaps with early permitting and can compress to 2 weeks. If you're design-bid-build (design locked, then GC hired), add another week for GC review and value-engineering.

Permit Submission & Approval (2–4 weeks): The City of Katy takes 5–10 business days for standard TI permits (interior, electrical, plumbing, HVAC). We handle submission and coordinate with the city's development services team—no surprises. Expedited routes (available in Katy for certain scopes) can shorten this to 3 days, though fees apply. In the Houston metro (areas like Sugar Land, Fulshear, Memorial), timelines vary; some jurisdictions take 2 weeks, others up to 4. We've worked all of them.

MEP Pre-Construction (1–2 weeks): Your mechanical, electrical, and plumbing subs need time to order long-lead items (HVAC units, electrical panels, fixtures). Our in-house MEP coordination confirms equipment availability and staging logistics before demolition starts. This prevents the nightmare of demo finishing with no HVAC unit in stock.

Total Pre-Construction: 4–8 weeks depending on permit complexity and design maturity.

Demolition & Rough-In Phase (2–4 weeks)

Once permits are in hand, demolition and rough construction begin—but they're rarely sequential.

Demolition (1–2 weeks): Removing old finishes, cabinetry, and non-structural walls in a 2,000–5,000 sq ft space typically takes 1–2 weeks. If hazmat (asbestos, lead paint) is present, add 1–2 weeks and cost. We scope every space for hazmat red flags during the pre-construction walkthrough.

Rough Mechanical, Electrical & Plumbing (2–3 weeks): While demo finishes, MEP subs rough-in ducts, conduit, and pipes. This overlaps demo—we typically start MEP rough-in in week 2 of demo. Coordination is critical: electrical rough-in, then HVAC ductwork, then plumbing (to avoid conflicts). A GC with poor MEP oversight creates 'chasing'—electricians waiting for HVAC ducts, plumbers waiting for electrical, everyone behind.

Our team coordinates weekly MEP meetings and inspections. If a conflict is spotted (duct hitting a beam), we solve it in-house rather than calling a 48-hour sub meeting.

Framing & Walls (1–2 weeks): Non-structural stud walls, doors, and openings are framed in parallel with MEP rough-in. This is where design-build shines: we coordinate framing around final MEP runs before drawing it, cutting chasing time in half.

Total Demolition & Rough-In: 2–4 weeks, often 3 weeks for a typical Katy or Houston metro TI.

Inspection & Drywall Phase (2–3 weeks)

Rough Inspections: City of Katy (and other municipalities) require rough inspections for electrical, plumbing, and HVAC. We schedule these proactively—no waiting for the city to find your job. Most pass the first time if subs follow code and drawings.

Drywall & Taping (1–2 weeks): Once rough MEP is approved, drywall goes up, taped, and mudded. Painting follows. This phase is straightforward if MEP is behind-wall and ready.

Total: 2–3 weeks.

Finish Phase (2–4 weeks)

Final MEP Installation (1–2 weeks): Electrical outlets, switches, lighting fixtures, HVAC grilles, plumbing fixtures, and appliance rough-ins. Coordination with flooring and cabinetry is essential—you can't install a dishwasher if the cabinet under-run isn't set.

Flooring, Cabinetry & Millwork (1–2 weeks): Hardwood, tile, vinyl, or polished concrete. Built-in cabinetry, shelving, or millwork. This phase is heavily schedule-driven; if flooring subs run late, cabinet installation stalls.

Final MEP Testing & Commissioning (3–5 days): HVAC balancing, electrical load testing, plumbing pressure tests, and gas line purging. The city schedules final inspections. We schedule these early and buffer 3–5 days for any rework.

Punch-out & Cleaning (3–5 days): Touching up paint, adjusting doors, final cleaning, and move-in prep. This sounds minor but often gets squeezed when schedules slip.

Total Finish Phase: 2–4 weeks, usually 3 weeks.

Total Commercial TI Timeline: 10–19 Weeks

• Design-build with no changes
• Simple MEP (office, retail, light food)
• No expedited permits needed
• Single sub per trade, reliable crews
• Owner available for decisions

• Design-bid-build or design-build with changes
• Moderate MEP (medical, restaurant, light manufacturing)
• Standard permit timelines
• Mixed sub availability

• Complex design or multiple revisions
• Specialized MEP (hood systems, lab gas, ADA lifts)
• Expedited permits not used
• Summer season (Katy/Houston's brutal June–August heat slows outdoor work and sub availability)
• Owner delayed decisions

Why Does Your TI Take Longer Than Expected?

The Permit Outsourcing Trap

When a GC outsources permitting to a third-party expediter, communication lags. Your permit sits in a queue; the GC only hears feedback 48 hours late. We submit and track your Katy or Houston metro permit in real-time, calling the city ourselves if needed. This saves 1–2 weeks off the typical timeline.

Uncoordinated MEP Subs

Most GCs hire electrician, plumber, and HVAC independently and hope they communicate. They don't. Conflicts emerge on-site, and trades wait for each other. Our MEP coordination service aligns all three trades on drawings, timelines, and material ordering before excavation begins.

Design-Bid-Build Delays

Architect → Bid → GC Selection → Permitting = 8–10 weeks before construction even starts. Design-build merges design and construction: we start permitting in week 2 of design, so permitting runs parallel to final drawings. We save 3–4 weeks this way.

Summer Heat & Hurricane Season

July and August in Katy are brutal. HVAC technicians are booked solid with emergency calls. Concrete cure times slow. If you're planning a TI that breaks ground in July, expect subs to stall. We schedule heavy TI work for spring (February–April) and fall (September–November) when possible. Hurricane season (June–November) means supply chain delays and worker availability swings.

Material Lead Times

Custom cabinetry, specialty HVAC units, and imported finishes can take 8–12 weeks. We lock material orders during design to hit your move-in date. Generic off-the-shelf finishes take 2–4 weeks; plan accordingly in your timeline.

How to Accelerate Your TI Without Cutting Corners

1. Lock Design Early

Design changes mid-construction are timeline killers. Finalize finishes, layout, and MEP routing before permit submission. If you're using design-build, we'll iterate fast and lock the design by week 3—not month 2.

2. Use Expedited Permits

The City of Katy and most Houston metro municipalities offer 3-day expedited review for a fee (typically $200–500). Worth it if your lease deadline is tight. We'll handle the paperwork and submission.

3. Pre-Order Long-Lead Items

HVAC units, electrical panels, custom fixtures, and cabinetry should be on order by week 2 of permitting—not week 10. We coordinate this through MEP coordination meetings.

4. Schedule Around the Climate

If you have flexibility, start your TI in spring or fall. Summer slows HVAC subs; wet seasons slow concrete and painting. A fall start (September–October) in Katy means you're framing and finishing in cooler weather, faster cure times, and less crew heat stress.

5. Hire a GC with In-House Permits and MEP

Most GCs are builders—they subcontract permits and MEP, creating handoff delays. We do both in-house. Your timeline is one PM's responsibility, not three separate vendors chasing each other. We've seen this alone compress timelines by 2–3 weeks.

Common TI Timeline Questions

What's the difference between design-build and design-bid-build for timeline?

Design-bid-build locks design, then bids go out, then a GC is hired and permitting starts. That's 4 sequential phases: 3–4 weeks design + 1–2 weeks bidding + 2–4 weeks permitting = 6–10 weeks before shovels turn. Design-build merges design and permitting: we start drawings and permits in parallel, so permitting is done by the time design is locked (week 6–8 total). You save 2–4 weeks and reduce design changes because the builder is in the room from day one.

Can we start construction before permits are finalized?

Not legally in Katy or the Houston metro. Demolition requires a permit. Starting demo without permits exposes you to city fines and liability. We've seen owners try this to "save time"—it backfires when the city stops work and forces a restart. Wait for the permit. Expedited permits exist for this reason: they're faster than the cost of a work stoppage.

How much does schedule slip in summer vs. fall in the Houston area?

Summer (June–August) in Katy slows TI work by 15–25% because HVAC subs are swamped with emergency AC calls, concrete cure times extend in heat, and painters work nights (slower). A 3-week finish phase in fall might take 4 weeks in summer. If your deadline is flexible, shift summer starts to spring (February–April) or fall (September–November). We plan around this climate reality every project.

What's the typical cost impact of rushing a TI timeline?

Accelerating a 14-week TI to 10 weeks costs 8–15% more: expedited permit fees, overtime labor, and premium material delivery. If your lease clock is ticking, it's worth it. If you have time, the "fast-track" design-build approach (design + build in parallel, standard permits) saves cost vs. accelerating a traditional timeline.

Ready to Start Your Katy or Houston TI?

Our team at Tanglewood Construction has guided dozens of owners through TI timelines—shopping centers in Katy, medical offices in Cypress, retail in Sugar Land, and corporate buildouts in the Energy Corridor. We own permits and MEP coordination, so you get one PM who owns the entire timeline, not three vendors passing the buck.

If you have a lease deadline and need a realistic schedule, call us at (832) 490-8910 or reach out to discuss your space, location (Katy, Cinco Ranch, Fulshear, or elsewhere in the metro), and move-in date. We'll map a timeline and flag where accelerated permits, design-build, or MEP overlap can save you weeks.

Let's build on time.