To get a commercial building permit in Houston, you submit sealed architectural and MEP drawings online through the City of Houston’s iPermits portal, pass plan review by the Houston Permitting Center (1002 Washington Avenue), and resolve any correction comments. Initial commercial plan review takes roughly 2 to 37 business days depending on scope, and most projects go through at least two correction cycles — so a typical project runs 8 to 16 weeks from application to permit. Complete, coordinated drawings on the first submittal are the biggest factor in landing at the short end of that range.
Step 1: Confirm What Your Project Triggers
Before drawing anything, establish three things. First, the occupancy classification of your intended use under IBC 2021 — restaurant (A-2), office (B), retail (M), daycare (E or I-4) — because a change of occupancy triggers its own review path (see our guide to change of use in Houston). Second, whether your construction cost will reach $50,000, which requires TDLR registration and Texas Accessibility Standards (TAS) review by a Registered Accessibility Specialist. Third, review the city’s Commercial Plan Review Prerequisites (form CE-1105) — requirements vary by scope of work.
Step 2: Produce the Permit Set
A Houston commercial permit set typically includes architectural sheets (floor plan, life safety, accessibility, finishes), sealed mechanical, electrical, and plumbing sheets, energy-code documentation (IECC 2021 compliance, usually via COMcheck), and structural sheets where the scope requires them. The City of Houston reviews against IBC/IMC/IPC/IFC 2021 with local amendments and current NEC electrical code. Drawings that contradict each other — an architectural ceiling that won’t clear the ductwork, a panel schedule that doesn’t match the lighting plan — generate correction comments, and each comment cycle adds a full review period.
Step 3: Submit Through iPermits
All applications and plans are submitted online through the city’s iPermits portal, where you upload documents, pay fees, track review status by discipline, and receive comments. Smaller-scope projects may qualify for the One-Stop Walk-In Plan Review program (launched March 2025), which reviews eligible minor commercial projects in a single expedited visit rather than routing them through full multi-discipline review.
Step 4: Answer Plan-Review Comments
Each reviewing discipline — building, mechanical, electrical, plumbing, energy, and where applicable health and fire — issues its own comments. This is where projects stall: if your architect and MEP engineer are separate firms, comments that touch both disciplines bounce between them. QD Design authors the full set in-house and answers every comment under one roof; on a 1,325 SF Houston tenant improvement, city comments on IECC 405.11 receptacle controls were resolved to permit approval in a single response cycle.
Step 5: Permit Issuance, Inspections, and Certificate of Occupancy
Once all disciplines approve, the permit is issued and construction can start. City inspectors verify the work against the approved drawings, and TDLR projects get a separate RAS accessibility inspection after completion. The final step is the Certificate of Occupancy — your space cannot legally open without it.
How Long Does It Really Take?
Plan on 8 to 16 weeks from first submittal to permit for a typical commercial project, plus design time before that. The variables you control: completeness of the first submittal, coordination between architectural and MEP sheets, and response speed on comments. QD Design’s design phase runs 3–5 weeks for typical tenant improvements — on a 25,250 SF industrial renovation, schematic design was approved 7 days after contract signing and the project was permitted on a 3–4 week total design schedule.
Frequently Asked Questions
Do I need sealed drawings for a Houston commercial permit?
Almost always. Commercial mechanical, electrical, and plumbing sheets must be sealed by a Texas-licensed Professional Engineer, and most architectural scopes require sealed architectural drawings as well. Cosmetic-only remodels with no system changes are the main exception — confirm with the Houston Permitting Center before assuming yours qualifies.
What is the fastest way through Houston plan review?
Submit a complete, internally consistent set the first time. Most projects lose more time to correction cycles than to the initial review itself. Eligible minor projects can also use the One-Stop Walk-In Plan Review for same-visit approval. A coordinated architecture + MEP set from one firm removes the most common comment source: sheets that contradict each other.
Does TDLR review happen at the city?
No. TDLR accessibility review is a separate state-level track: projects with construction cost of $50,000 or more must be registered and the drawings reviewed by a Registered Accessibility Specialist, with an inspection after construction. It runs in parallel with the city permit. QD Design handles TDLR registration and coordination as part of its permit sets.
Can I start construction while comments are outstanding?
No. Building without an issued permit risks stop-work orders, double fees, and demolition of non-compliant work. If schedule is critical, ask about phased or foundation-only permits — and get your design team to answer comments fast rather than starting early.
Get a Permit-Ready Set for Houston
QD Design produces sealed architecture + MEP permit sets for City of Houston review and answers every plan-review comment until your permit is issued. Send us your floor plan — you’ll get a fee proposal within one business day.