Permit Design PERMITDESIGN
Harris County · NEC 2020 · CenterPoint · No Building Permit

Houston Solar
Permit Design.
Electrical Permit Only.
Choose Your REP First.

Houston solar permit drawings and plan sets for City of Houston and all Harris County AHJs. Houston is unique in Texas: residential solar under 50kW needs only an electrical permit — no building permit. CenterPoint handles interconnection. But your customer gets zero export credit without a solar buyback REP. Pick that first. Free for first-time clients.

Electrical permit only
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CenterPoint interconnection
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NEC 2020 · iPermits
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Free AHJ revisions
No Bldg PermitResidential solar <50kW — electrical permit only via iPermits
CenterPointDistribution utility · handles interconnection for all Houston solar
ERCOT REPCustomer must choose solar buyback plan before install
24–48 hrStandard residential plan set delivery
2026 Codes Electrical: NEC 2020 (Houston adopted 2022) Structural: IBC 2021 / IRC 2021 Permit: Electrical only for residential <50kW · iPermits portal Grid: ERCOT deregulated · CenterPoint distribution Last verified July 2026
Houston’s Two Solar Facts Every Installer Needs

No Building Permit for Residential Solar. And Without a Solar Buyback REP, Your Customer Exports for Free. Both Matter Before You Pull the First Panel.

Houston has the most permitting-friendly residential solar rules of any major Texas city — electrical permit only for systems under 50kW on existing roofs. But the deregulated ERCOT electricity market creates a trap: CenterPoint Energy owns the grid and handles interconnection, but CenterPoint does not buy excess solar generation. Your customer needs a solar buyback Retail Electric Provider (REP) enrolled before the system goes live, or every exported kilowatt-hour earns nothing.

Electrical Permit
iPermits Portal · 3–7 Business Days · No Building Permit Needed
Residential solar <50kW on existing roof: electrical permit only via iPermits
No building permit required — unique among major Texas cities
Electronic submission · $250–500 fee · property owner Declaration required
⚠️Properties in flood plains or historic districts may need additional review
⚠️CenterPoint interconnection application runs parallel — start simultaneously
REP Selection
Solar Buyback REP · Must Be Active Before System Goes Live
⚠️CenterPoint does not buy excess solar — customers need a solar buyback REP
⚠️Without a solar buyback plan, all exports earn $0 in ERCOT deregulated market
Chariot Energy: top-rated 2026, competitive buyback rate in CenterPoint area
Green Mountain Solar Credit 12: credits don’t expire, non-expiring rollover
Compare all plans at PowerToChoose.org before customer commits to a system
⚠️ REP enrollment must happen before the system goes live — not after. Some customers switch REPs post-install and lose their solar buyback plan without realizing it. Build REP selection into the pre-install checklist every time. We include a REP selection note in Houston plan set deliverables as a reminder.
Why Houston Installers Outsource

Suburban AHJ Fragmentation. Flood Plain Requirements. Commercial Building Permits That Don’t Match the Residential Process.

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City of Houston Electrical-Only ≠ Every Houston Suburb
Houston’s electrical-only permit process applies to addresses within Houston city limits. Katy, Pearland, Sugar Land, Friendswood, League City, and dozens of surrounding municipalities each have their own building departments and permit requirements — many requiring a building permit in addition to electrical. A “Houston area” address is not always a Houston address. We confirm the AHJ before building and format the plan set for the correct jurisdiction.
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Houston Flood Plain Properties Have Additional Requirements
Harris County has one of the largest flood plain footprints in the US. Properties in designated flood plains may require additional review under FEMA NFIP and City of Houston flood ordinance requirements before solar permits are issued. Check FEMA Flood Map Service Center before submitting — flood plain status isn’t always obvious from a street address and a missed flag causes permit delays.
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Commercial Solar in Houston Requires Both Building and Electrical Permits
Houston’s electrical-only process applies to residential systems under 50kW. Commercial rooftop solar, ground-mount systems, and large residential systems all require both building and electrical permits through Houston Permitting Center. Plan sets for commercial Houston solar need structural drawings that residential-only firms don’t always include. Permit Design covers the full commercial scope — IBC 2021 structural with wind and gravity calcs for Houston’s Gulf Coast exposure.
Houston Solar Permit Services

iPermits Electrical. CenterPoint Interconnection. REP Note Included. All Harris County AHJs.

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Houston Residential Solar Permit Design
NEC 2020, IBC/IRC 2021. iPermits electrical permit formatted — no building permit drawings needed for residential <50kW. CenterPoint interconnection package. Battery (NEC 2020 Article 706) where included. REP solar buyback selection note included in deliverable.
NEC 2020Electrical OnlyCenterPoint
Residential Solar Permit Design Services →
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Houston Commercial Solar Permit Design
Commercial rooftop and ground-mount permit drawings. IBC 2021, NEC 2020. Houston Permitting Center building + electrical permit. CenterPoint commercial interconnection. Gulf Coast wind exposure ASCE 7 calcs — Exposure C at or near coast. PE stamp for commercial projects.
IBC 2021Gulf Coast WindPE Stamp
Commercial Solar Permit Design Services →
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Houston Battery Permit Plans
Solar-paired and standalone battery permit drawings. NEC 2020 Article 706, CenterPoint storage interconnection. ERCOT grid events — including Winter Storm Uri-type outages — make battery a strong Houston residential sale. Grid independence during extended outages is a real and memorable customer concern in the Houston market.
NEC 2020 Art.706Grid ResilienceCenterPoint
Battery Storage Permit Design Services →
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Houston EV Charger Permit Design
EV charger permit drawings for Harris County residential and commercial. NEC 2020 Article 625, load calculations, panel upgrade integration. Houston’s energy industry workforce and large suburban lots create strong residential Level 2 demand. Commercial fleet EV charging at logistics and industrial facilities growing rapidly.
NEC 2020 Art.625Fleet DCFCLoad Calcs
EV Charger Permit Design Services →
Houston Solar Market — 2026

Four Things That Define Solar in Houston.

Electrical Only
No Building Permit for Residential <50kW — Fastest Permit Path in Texas
Houston’s electrical-only permit process for residential solar under 50kW is the fastest in Texas for city-proper addresses. The iPermits online portal accepts electronic submission. Typical approval: 3 to 7 business days. No building department review, no structural plan check for standard rooftop residential. Submit electrical permit and CenterPoint interconnection simultaneously — interconnection is the longer of the two tracks at 4 to 8 weeks.
ERCOT
Deregulated Market — REP Selection Changes Everything
Houston is in ERCOT’s fully deregulated electricity market. CenterPoint Energy distributes electricity but doesn’t sell it or set solar buyback rates. Your customer’s solar export value depends entirely on their REP. Without a solar buyback REP, exports earn $0. Leading options in the CenterPoint service area: Chariot Energy, Green Mountain Solar Credit 12 (non-expiring credits), and TXU Solar Buyback. Direct every Houston customer to PowerToChoose.org before install.
Gulf Coast
Wind Exposure C Near the Coast — Commercial Plans Need the Right Calcs
Houston sits in a High Wind Zone and Gulf Coast wind exposure area. Residential rooftop solar uses standard ASCE 7 wind calculations for Harris County. Commercial rooftop, carport, and ground-mount systems closer to the coast require Exposure C wind calculations — higher uplift forces, heavier structural requirements, and PE-stamped drawings. Out-of-state firms that don’t know the Gulf Coast wind exposure sometimes submit Exposure B calcs for Exposure C sites.
Battery
ERCOT Grid Events — Battery Sells Differently in Houston Than Anywhere Else in Texas
Winter Storm Uri in 2021 left millions of Houston-area residents without power for days. ERCOT grid events and extreme weather outages are not abstract here. Battery storage for grid independence during extended outages resonates with Houston homeowners in a way that pure ROI arguments don’t always capture. The combination of grid resilience and ERCOT export value optimization makes battery a natural conversation in every Houston solar proposal.
AHJ Solar Permit Design Houston

City of Houston and All Harris County Jurisdictions — Electrical Permit or Building + Electrical Confirmed Per Address.

We cover City of Houston and all surrounding suburbs. AHJ confirmed per address — the electrical-only process applies to city-proper addresses only.

JurisdictionUtilityPermit TypeKey NotesReview Time
City of HoustonCenterPointElectrical onlyiPermits portal · <50kW residential no building permit · $250–500 fee3–7 business days
Katy (Harris/Fort Bend)CenterPointBldg + electricalCity of Katy or county depending on address · Confirm AHJ1–3 weeks
PearlandCenterPointBldg + electricalCity of Pearland Building · Brazoria County some addresses1–3 weeks
Sugar Land / Missouri CityCenterPointBldg + electricalFort Bend County area · Suburban growth market1–3 weeks
The Woodlands / ConroeCenterPointCounty/CityMontgomery County · Township MUDs · Confirm AHJ per address1–3 weeks
League City / FriendswoodCenterPointBldg + electricalGalveston / Harris County line · Coastal proximity — wind exposure check1–3 weeks
Baytown / PasadenaCenterPointBldg + electricalEast Harris County · Industrial corridor · Commercial solar growing1–3 weeks

Also covered: Humble, Spring, Cypress, Tomball, Stafford, Galveston, and all Houston metro cities. References: Houston Permitting Center · CenterPoint Solar Interconnection · PowerToChoose.org

What You Get

Solar Permit Package Houston — Houston Solar Permit Plan Sets. iPermits Formatted. CenterPoint Ready.

01
Cover Sheet — Houston PV Permit Plans
NEC 2020 · IBC/IRC 2021 · City of Houston or suburb AHJ · Electrical permit formatted (no building permit drawings for residential <50kW)
02
Site Plan
Meter and CenterPoint interconnection access location · ASCE 7 Harris County wind values · Flood plain notation where applicable
03
Roof Layout
Array diagram · Pitch, azimuth, setbacks · Houston composition and tile rooftops · IFC 2021 §1205 fire access paths
04
Single-Line Diagram
NEC 2020 §690.12 rapid shutdown · Battery (Article 706) where included · CenterPoint bidirectional meter · ERCOT REP note
05
Structural Calculations
IBC/IRC 2021 · ASCE 7 Harris County wind loads (Exposure C near coast) · Gravity and lateral loads · PE stamp for commercial
06
Rapid Shutdown + Labels
NEC 2020 §690.12 · Battery shutdown interface (Article 706)
07
Equipment Datasheets + CenterPoint Interconnection Package
UL-listed module, inverter, racking, and battery datasheets · CenterPoint Energy interconnection application · iPermits property owner Declaration template · REP solar buyback selection note · Texas property tax and sales tax exemption notes

Houston Plan Set — 24 Hours.

Electrical Permit Only · CenterPoint Interconnection · ERCOT REP Note · All Harris County AHJs

How It Works

Three Steps. 24 Hours. iPermits Ready.

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Submit the Project
Share the address, specs, and system design. We confirm city vs suburb AHJ, electrical vs building + electrical requirement, flood plain status, and NEC 2020 format.
5 minutes
We Build the Plan Set
NEC 2020, IBC/IRC 2021. iPermits electrical permit formatted. CenterPoint interconnection package. Gulf Coast wind calcs where needed. Battery permit plans (Article 706) where included.
24–48 hours
Submit Permit + Interconnection
Submit iPermits electrical permit and CenterPoint interconnection simultaneously. Free revisions for any AHJ correction related to our design.
Free revisions
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The Permit Design Commitment
Solar permit services in Houston — what every installer and EPC gets on every project.
City vs suburb AHJ confirmed — electrical-only or building + electrical per address
CenterPoint interconnection package formatted and included
24–48 hour delivery on standard residential solar projects
NEC 2020 formatted for Houston — not California NEC 2026
Free revisions for any AHJ correction related to our design
Start Free Trial →
First plan set free.
Licensed installers & EPCs only.
FAQ

Questions Houston Installers Ask Us

No — for addresses within Houston city limits, residential solar systems under 50kW on existing roofs require only an electrical permit through the Houston Permitting Center iPermits portal. No building permit required. This is unique among major Texas cities. The electrical permit application requires a signed Declaration Supporting Building Permit Application validated against HCAD property records. Suburban Houston addresses — Katy, Pearland, Sugar Land, The Woodlands — are different jurisdictions with their own requirements and may require both building and electrical permits.
CenterPoint Energy distributes electricity in Houston but doesn’t sell it or set export rates. Your customer needs a Retail Electric Provider (REP) with a solar buyback plan — without one, exported solar earns nothing. Leading plans in the CenterPoint area in 2026: Chariot Energy (top-rated overall), Green Mountain Solar Credit 12 (non-expiring credits), and TXU Solar Buyback. Customers can compare all available plans at PowerToChoose.org. The REP must be enrolled before the system goes live.
Houston adopted NEC 2020 in 2022 — it’s the current working electrical standard for solar permits. All Permit Design Houston plan sets reference NEC 2020 Article 690 for solar PV and Article 706 for battery storage. NEC 2026 adoption had not been confirmed for Houston as of July 2026.
Texas has no statewide PE stamp requirement for residential solar. Houston’s electrical permit process for residential solar under 50kW does not require a PE stamp for standard rooftop installations. Commercial solar projects, ground-mount systems, and larger systems require engineering documentation and PE-stamped structural drawings. We include PE stamps on all Houston commercial plan sets.
All of them — City of Houston, Harris County, and surrounding jurisdictions including Katy, Pearland, Sugar Land, Missouri City, League City, Baytown, The Woodlands, Conroe, Humble, Spring, Cypress, and Tomball. Suburban addresses follow their own city or county permit requirements — we confirm the AHJ per address before building.
For most Houston customers, yes — and the ERCOT grid history makes the argument. Winter Storm Uri knocked out power to millions of Houston-area homes for days. ERCOT grid events during extreme heat and cold are a recurring reality. Battery storage for grid independence during outages is a concrete, lived concern for Houston homeowners. On top of resilience, battery that stores midday solar for evening consumption reduces grid purchases during higher-rate evening periods under most REP plans.
Most Houston residential plan sets ship in 24 to 48 hours. Battery permit plans same day. Commercial and Gulf Coast wind exposure projects: 3 to 5 business days. Rush available on request.
Reviewed by the Permit Design Engineering Team — Licensed PE Houston electrical-only permit for residential <50kW confirmed from Houston Permitting Center guidelines. NEC 2020 adoption (2022) confirmed. CenterPoint Energy solar interconnection requirements confirmed. ERCOT deregulated market structure confirmed — REP selection requirement for solar buyback confirmed. Chariot Energy, Green Mountain, TXU solar buyback plans confirmed from PowerToChoose.org listings (July 2026). Texas SB 1036 and SB 1697 (eff. September 2025) confirmed. Last reviewed July 2026.
NEC 2020Houston Electrical Permit Only CenterPoint InterconnectionERCOT REP Solar Buyback Houston Solar Drafting ServicesHouston Solar CAD Services July 2026