Houston Solar Permit Drawings

Avila Solar Drafting prepares the drawings and supporting documents a Houston solar permit application needs. Houston has accepted SolarAPP+ since July 15, 2024, but not every address qualifies — projects in the windborne debris region are excluded and go to traditional plan review instead. That single test changes what your package has to contain, so we settle it before drafting rather than after a rejection.

Key takeaways

• SolarAPP+ has been live in Houston since July 15, 2024 — but an address with a basic design wind speed of 140 mph or greater is not eligible and must go through traditional plan review.
• The eligibility test is address-level, not citywide. Houston publishes no wind map of its own and defers to the national ASCE 7 Hazard Tool.
• CE-1198, revised March 2024, is the city’s own submittal guide — it names the sheets, the sealed structural documentation and the interconnection paperwork a package needs.
• Houston publishes no plan review turnaround. Its permitting dashboard reports backlog only. Anyone quoting you a city-side day count is quoting a number the city does not publish.
• We draw the permit set. You file it. The portal account and the contractor licence stay on your side.

What we do, and what stays with you

Worth stating plainly before anything else, because the search results for this topic blur it constantly: Avila Solar Drafting does not pull permits, file applications, act as a permit runner or expedite anything. We produce the permit design — the drawings, the calculations, the code analysis and the supporting documents that make an application reviewable.

The submission itself stays with you, and that is not us offloading work. Houston’s portal account, the contractor registration behind it and the licence the application is filed under all sit on the installer’s side of the line. What we can do is make sure that when you upload, the package answers the reviewer’s checklist without a round trip. Our national solar permit design page covers how that split works across every market we draw for.

The 140 mph question that decides your review path

This is the most consequential fact about permitting solar in Houston, and almost nobody publishes it.

The Houston Permitting Center has accepted SolarAPP+ for residential PV since July 15, 2024. SolarAPP+ is an automated compliance check that issues a permit without a human plan reviewer, which is genuinely fast when a project qualifies. The exclusion is the part that catches people: a project whose basic design wind speed is 140 mph or greater sits in the windborne debris region and is not eligible. It goes to traditional plan review.

Houston is a coastal metro spanning roughly fifty miles inland. The wind speed at a Baytown address and the wind speed at a Cypress address are not the same number, and the threshold runs between them rather than around the city. So the eligibility answer is a property-level determination, not something you can memorise once and apply to a whole install territory.

The practical consequence for scheduling: a job you priced on an instant-approval assumption and then discover is above the threshold does not just get slower, it needs a different and heavier document package. We run the determination at intake, per address, and tell you which track the project is on before drawing starts.

CE-1198: what the City of Houston actually asks for

Houston is more forthcoming than most authorities about its expectations. CE-1198, the Solar Photovoltaic Panel Permit and Inspection Guide, revised March 2024, sets out the submittal contents directly. A complete package under it includes:

• A plan cover sheet, a sheet index and a code analysis sheet.
• A site or plot plan showing panel locations and distances to all property lines.
• A roof plan with the panel layout, the mounting and railing locations, and existing roof penetrations.
• Structural letters, calculations, details and manufacturer installation instructions sealed by a Texas Professional Engineer.
• Electrical plans demonstrating compliance with NEC Article 690 and listed equipment.
• A CenterPoint Energy interconnection application.
• A signed declaration supporting the building permit application, and proof of ownership matching HCAD records.

The plan review fee is stated as 25% of the permit fee. Houston enforces the 2023 NEC with either the 2021 IRC or 2021 IBC, depending on the structure being built on. Applications run through the city’s iPermits system, with plan documents uploaded to ProjectDox after fees are paid; the electrical application is form CE-1057. The sheet-level deliverable that answers all of this is described on our Houston solar plan sets page.

Two authorities, one metro: Houston or Harris County?

Texas counties generally have no building permit authority outside city limits. Harris County is a notable exception — it runs a residential permitting program for unincorporated areas through the county engineer’s office and its own e-Permits portal, enforcing the 2021 I-codes with county amendments.

That gives the Houston metro two parallel systems. An address inside the city limits is a Houston Permitting Center submittal. An address in unincorporated Harris County is a county submittal, through a different portal with different forms. And the surrounding incorporated cities — Pasadena, Sugar Land, Missouri City, Pearland, Baytown, Conroe — permit independently of both.

Installers working the whole metro hit this constantly, usually as a lost day rather than a rejection: the package is fine, it is simply queued at an authority that does not review that address. Confirming the reviewing authority is the first thing we do at intake, before the code cycle question. The broader pattern of jurisdiction-to-jurisdiction variation is covered in permitting nuances installers miss, and the causes behind most rejections in why permits get rejected.

How long does Houston plan review take?

There is no published answer, and that is worth knowing rather than guessing at. The City of Houston’s permitting dashboard reports backlog metrics for solar filings — total plans in queue, oldest plan, oldest plan by business unit — and no committed or average turnaround. The SolarAPP+ material describes the automated track as faster without attaching a day count to it.

We do not quote a city-side timeline because none exists to quote. What we do commit to is our own side: 2–3 business days for a standard set, 1–2 on Fast Roof, and 1 business day when Fast Roof is paired with a Roof Order or EagleView XML — and comment responses handled free inside the six-month revision window.

The interconnection track runs beside the permit, not after it

CenterPoint Energy interconnection is a separate approval from the building permit, and CE-1198 expects the interconnection application to be part of the submittal package. CenterPoint’s own guidance is that where a permit is required, its visual inspection will not be processed until the local inspection has passed — so the two tracks have to be started in parallel but finish in order.

On review tiers, CenterPoint’s documentation sets study-fee bands at 0–10 kW, above 10 kW to 500 kW, above 500 kW to 2 MW, and above 2 MW to 10 MW, with systems under 25 kW AC typically skipping a full interconnection study. For a residential retrofit that means the electrical design, not the interconnection study, is the gating item. Commercial scopes above those thresholds change the answer, and are worth scoping at intake.

Drawn to the cycle in force on September 1

Statewide, the Texas Department of Licensing and Regulation has proposed adopting the 2026 NEC effective September 1, 2026 under 16 TAC §73.100, published in the Texas Register in March 2026. Final adoption is not yet confirmable from the codified rule, so we treat that date as expected rather than settled and confirm it at intake — and individual cities align on their own ordinances regardless. For a Houston project submitted close to that date, the question to settle with the reviewer is which cycle governs a set filed before the change but reviewed after it. Boundary projects are flagged at intake and drawn accordingly. Background on the articles behind a solar submittal is in which NEC articles apply.

Where a Houston scope turns out to need a sealed structural package, our engineering stamps service handles it in-house rather than putting your schedule back into someone else’s queue.

Houston Solar Permit Design FAQs

Start a Houston permit package

A Houston resubmittal costs more calendar time than the drafting did. We settle the review track and the reviewing authority before drawing, build the package CE-1198 asks for, and respond to plan review comments free for six months.

Or call 971-410-0655 to have an address checked before you commit to a schedule. Avila Solar Drafting LLC, 11995 SW Walker Rd, Beaverton, Oregon · 971-410-0655 · info@avilasolar.com.