Houston, 2026
Houston Commercial Roof Permit & Code Guide
Three things determine whether a commercial re-roof in Houston goes smoothly, and not one of them is the membrane. They are the permit, the energy code, and which side of Highway 146 the building sits on. Nobody else in this market publishes any of it, so here it is.
Permitting
1. The City of Houston commercial roofing permit
The City of Houston requires a commercial roofing permit for a new roof or an overlay on a commercial structure. The permit code is HPWCODE1157, issued through Houston Public Works.
- Permit codeHPWCODE1157
- CoversA new roof or overlay on a commercial structure
- Admin fee$33.56, plus the City fee schedule amount
- Plan reviewRequired
- InspectionRequired
- Processing time10 business days
- Valid period6 months
- Worksheet, full re-roofCE-1076, Commercial Re-Roof Only
- Worksheet, overlayCE-1104, Roofing Overlay Only
- Also neededBuilding permit application, two complete sets of plans if applicable
Applications go through the City's iPermits system. Inspections are scheduled through the automated line on 713-222-9922 or through Structural Inspections on 832-394-8840, and reinspections through the same structural number. The permit must be kept on site until final approval.
Plan review can additionally route through any of structural, planning, utilities, stormwater, traffic, mechanical, electrical, plumbing, infrastructure, forestry, sprinklers, fire marshal, health, engineering and floodplain, depending on the scope. On a straightforward membrane replacement it usually does not. On anything involving structural deck work, added equipment or a building in a floodplain, it can.
Why the two worksheets matter more than the fee does
CE-1076 is the Commercial Re-Roof Only worksheet. CE-1104 is the Roofing Overlay Only worksheet. The City treats a tear-off and a recover as different work, and the reason is the energy code below. If your contractor is filing CE-1104, you are getting a recover. If that is not what you thought you were buying, now is the moment to find out.
Source: City of Houston Permitting Center, HPWCODE1157 Commercial Roofing Permit. Houston Public Works is at 1002 Washington Ave., Houston, TX 77002. Fees and processing times change; verify current figures against the City fee schedule before budgeting.
The energy code
2. The energy code trigger on a tear-off
A full roof replacement in Houston requires the new assembly to meet the current energy code. A recover generally does not. On a building with old, thin insulation, that difference is worth more than the membrane.
Houston adopted the 2021 International Codes, including the 2021 IECC under Ordinance No. 2023-907, effective January 1, 2024. Houston sits in IECC climate zone 2A. Where a roof assembly with insulation entirely above the deck is replaced, the assembly must meet the current continuous insulation requirement, which for climate zone 2A is R-25, and the code separately prohibits the replacement from reducing the assembly's R-value.
R-25 of continuous above-deck insulation is about 4.4 inches of polyiso in two staggered layers. If your building has been running on an inch and a half since 1998, you are adding roughly two and a half inches of thickness to the roof surface.
What follows from raising the roof
- Edge metal and coping. New, taller, fabricated to the new height.
- Drain sumps. The drains do not rise with the roof, so each needs a tapered sump built around it or the roof ponds at every drain.
- Curb heights. Manufacturers and code want eight inches of flashing height above the finished surface. Raise the roof and some curbs no longer have it, so they get extended, which is mechanical work as well as roofing work.
- Roof hatches, thresholds and equipment pads that now sit too low.
- Parapet height, which on a low parapet can become a guarding question.
How to use this when comparing bids
Ask every bidder, in writing: what insulation thickness and total assembly R-value are you providing, and does it meet the current Houston energy code? Two bids within a few percent of each other where only one names a thickness are not pricing the same job. It is the single most effective question on the list and it takes one line of an email.
Sources: ICC, Houston City Council adoption of the 2021 International Codes; 2021 IECC section C402.1.3; City of Houston code archive.
Windstorm
3. The Highway 146 windstorm line
The Texas Department of Insurance designated catastrophe area covers fourteen coastal counties plus the portion of Harris County east of Highway 146. Inside city limits, that means La Porte, Morgan’s Point, Pasadena, Seabrook and Shoreacres.
Structures built, altered, remodelled, enlarged, repaired or added to on or after January 1, 1988 inside that area need a TDI certificate of compliance, a WPI-8, to remain eligible for windstorm and hail coverage through the Texas Windstorm Insurance Association. From April 1, 2026, WPI-1 applications must be certified under the 2024 IRC or 2024 IBC.
The practical points, in order of how much they cost to get wrong:
- The inspection happens during the work, not after it. This is the one that cannot be fixed retrospectively. Once the roof is closed up, the opportunity has gone and the certificate cannot be issued.
- The assembly has to be an approved one. Not any membrane over any insulation.
- West of the line, none of this applies. If a contractor tells you your Katy, Cypress, Sugar Land or central Houston building needs windstorm certification, they are mistaken or selling something.
Because the boundary follows a highway and city limits rather than a county line, some cities straddle it. Pasadena and Baytown both do. Check your specific address against the TDI designated catastrophe area map before anybody prices the roof, and check what certificates already exist on your building through the TDI windstorm certificate search, which is public and free.
| Submarket | TDI catastrophe area | WPI-8 required | Permit authority |
|---|---|---|---|
| Bellaire | outside | no | City of Bellaire |
| Stafford | outside | no | City of Stafford |
| Pasadena | partly, east of 146 | for buildings east of 146 | City of Pasadena |
| Channelview | outside | no | Harris County |
| Humble | outside | no | City of Humble |
| Deer Park | outside | no | City of Deer Park |
| Katy | outside | no | City of Katy |
| Sugar Land | outside | no | City of Sugar Land |
| Cypress | outside | no | Harris County |
| Spring | outside | no | Harris County |
| La Porte | inside | yes | City of La Porte |
| Baytown | partly, east of 146 | for buildings east of 146 | City of Baytown |
| Tomball | outside | no | City of Tomball |
| The Woodlands | outside | no | Montgomery County |
Derived from the TDI designated catastrophe area, which follows Highway 146 through Harris County. Cities that straddle the line are marked partly: confirm your specific address on the TDI map rather than relying on the city name.
Licensing
4. Nobody licenses roofers in Texas
Texas does not license roofing contractors. The Texas Department of Licensing and Regulation licenses electricians and HVAC contractors, and roofing is not on the list. Anyone can begin trading as a roofer in this state tomorrow morning with no test, no bond and no registration.
A few Texas cities require local registration, notably Austin and San Antonio. Houston does not. So a "licence number" on a Houston roofing website is either a licence for something else, an out-of-state credential, or fictional.
What you can actually verify:
- Certificate of liability and workers' compensation insurance, sent to you directly by the carrier rather than as a PDF from the contractor.
- Manufacturer certifications. GAF, Carlisle SynTec, Johns Manville, Versico, Duro-Last and the rest maintain approved contractor lists, and only a certified contractor can register a full system warranty. Ring the manufacturer and ask.
- TDI windstorm certificate search, which is public and shows every WPI-8 ever issued at an address.
- RCAT voluntary licensing programme, run by the Roofing Contractors Association of Texas, with separate commercial and residential credentials.
- Three commercial buildings in Houston you can drive past. Still the most informative request you can make.
And on deductibles
Under Texas law it is an offence for a contractor to pay, waive, absorb, rebate or otherwise offset an insurance deductible on a property insurance claim. A contractor offering to "cover your deductible" or "make it disappear" after a storm is proposing something illegal, and is telling you a great deal about how the rest of the job will go.
Checklist
The ten-question checklist
Print this and send it to every bidder. It takes five minutes and it is worth more than a fourth quotation, including against us.
- What membrane, what manufacturer, and what mil thickness?
- What insulation, what thickness, what total assembly R-value, and does it meet the current Houston energy code?
- Is this a replacement or an overlay, and which permit worksheet are you filing?
- Are you pulling the permit, and is the fee in your number?
- What are your unit rates for deck replacement?
- What is the attachment method, and is corner and perimeter fastening enhanced?
- What warranty, from whom, for how long, and what is the wind speed exclusion?
- Is tapered insulation, are crickets and are drain sumps included?
- What is the draw schedule?
- Does the building need a WPI-8, and if so when in the programme is the inspection?
Any contractor who answers all ten without hesitating is probably worth having, more or less regardless of which system they recommended. The cost page has the numbers to check the answers against.
Common questions
Permit and code questions
Do I need a permit to re-roof a commercial building in Houston?
Yes. The City of Houston requires a commercial roofing permit, HPWCODE1157, for a new roof or an overlay on a commercial structure. Plan review is required and inspection is required.
How long does a Houston commercial roofing permit take?
About 10 business days of processing, and the permit is then valid for 6 months. Plan review may route through additional groups depending on scope, including structural, planning, stormwater, mechanical, fire marshal and floodplain, and each of those can add time. Build the review period into the programme rather than discovering it after the material has been ordered.
What does the permit cost?
There is a $33.56 administrative fee plus the permit fee from the City of Houston fee schedule, which is based on the scope of work. It is small money relative to a commercial re-roof. The cost of not having one is not small: it is your certificate of occupancy and your position with an insurer and a future buyer, not the contractor's.
Does adding insulation to meet code apply to an overlay as well?
Generally no, and that is precisely why the City issues two different worksheets. A recover or overlay leaves the existing assembly in place and does not trigger the replacement requirement in the same way a tear-off does. A full replacement of a roof assembly with insulation entirely above the deck does trigger it, and the assembly has to come back at R-25 continuous for climate zone 2A. This is the single biggest hidden cost difference between the two jobs.
Does any of this apply outside the City of Houston?
No, and that catches people out constantly. Bellaire, Stafford, Sugar Land, Pasadena, Deer Park, La Porte, Baytown, Humble, Katy and Tomball all run their own building departments with their own requirements. Cypress, Channelview and Spring are unincorporated Harris County. The Woodlands generally permits through Montgomery County and additionally has covenant design review. A contractor quoting you the Houston process for a building outside Houston has not checked. Permit authority by submarket is in the table here.
Talk to a roofer
Want us to walk your building and check all of this?
We will confirm the permit authority, the windstorm status and what the energy code will require on a tear-off, and put it in writing. No charge, and you keep it whether or not you use us.
Call (281) 720-3785- A roofer picks up, not a call centre
- Line-item written scope before anything is torn off
- Progress billing tied to milestones, never 85% up front