County Permit SearchU.S. compliance directory
← Collin County overview

Codes, exemptions & field inspections

Build to the adopted code. Verify every exception.

This guide translates the available agency record into a preconstruction checklist for structural scope, minor work, and inspection release. The adopted code and the issuing official control when a field condition is disputed.

Regulatory framework

The code baseline for Collin County.

In unincorporated Collin County and county-permitting ETJ areas, residential and non-residential projects that disturb ground or add a footprint require a county Development Services permit; commercial projects may also require Fire Marshal permits. New residential dwellings and substantial remodels require a third-party inspection under state law/County Court Order. County floodplain regulations prohibit new residential structures in a FEMA Special Flood Hazard Area and require applicable floodplain permits, elevations, and flood-damage measures. OSSF work is regulated under Texas Health and Safety Code Chapter 366, 30 TAC Chapter 285, and stricter county OSSF rules; no separate county ICC edition was published.

Inspection lane

Apply through the Citizen Self-Service portal; it accepts permit and plan applications, schedules inspections, provides review comments and status, and accepts fees. For residential/OSSF questions contact Development Services at 972-548-5585 or DevelopmentServices@co.collin.tx.us; OSSF inspections use DevelopmentSvcInspections@co.collin.tx.us. Apply for a development permit first when a new structure will connect to a new OSSF; staff then sends the associated OSSF permit through the portal. Commercial applicants should contact the Fire Marshal’s Office at 972-548-5576.

Minor-work playbook

Understand what may be exempt—and what is not.

Permits are generally not required for re-roofing, new electrical service on an existing structure, roof-mounted solar panels, water-heater replacement, or AC-unit changeout when the project does not disturb ground, add footprint, create a new tenancy, or otherwise meet the county’s extensive-remodel threshold. Non-residential examples also include antenna additions on an existing cell tower without a new ground footprint. County and municipal/ETJ requirements can still change the result.

Field rule

A permit exemption generally addresses one narrow construction trigger. It does not automatically waive zoning, land-use, floodplain, shoreline, fire, energy, electrical, utility, septic, or right-of-way requirements. Obtain written confirmation when the project involves a new structure, structural alteration, change in occupancy, or concealed work.

Inspection pipeline

Keep the work visible at every release point.

  1. 1

    Request with lead time

    Apply through the Citizen Self-Service portal; it accepts permit and plan applications, schedules inspections, provides review comments and status, and accepts fees. For residential/OSSF questions contact Development Services at 972-548-5585 or DevelopmentServices@co.collin.tx.us; OSSF inspections use DevelopmentSvcInspections@co.collin.tx.us. Apply for a development permit first when a new structure will connect to a new OSSF; staff then sends the associated OSSF permit through the portal. Commercial applicants should contact the Fire Marshal’s Office at 972-548-5576.

  2. 2

    Preserve access

    Do not cover framing, reinforcement, wiring, piping, damp-proofing, or life-safety work until the required inspection has been completed and documented.

  3. 3

    Close the record

    Retain the approved plans, inspection approvals, correction responses, and final certificate or occupancy release with the property file.

Contractor verification

Verify the builder before the contract is signed.

Use the state licensing system to verify active registration, trade credentials, bond status, and liability coverage where available. Match the legal business name to the proposal and permit application.

Verify contractor ↗

Planning reference

Keep the parcel rules beside the building plans.

A building permit is only one part of statutory compliance. Check the local zoning, ordinance, map, or land-use reference before finalizing setbacks, height, lot coverage, access, drainage, or accessory structure placement.

Open planning reference ↗

Source trail

Official sources for this profile

Use these direct agency or licensing links to confirm current instructions before you file, pay, or schedule work. External pages control if their information differs from this directory.

Agency websiteOpen official source ↗Permit portalOpen official source ↗Application instructionsOpen official source ↗Fee scheduleOpen official source ↗Planning or zoning referenceOpen official source ↗Contractor license lookupOpen official source ↗

Project questions

Frequently asked questions for Collin County

Who handles permitting for this jurisdiction?

Collin County Development Services / Engineering and Fire Marshal’s Office is the identified county-level authority for this profile. Confirm that the property is in its service area before filing.

How should I begin an application?

Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact 972-548-5585 (Development Services); 972-548-5576 (Fire Marshal’s Office); 972-548-3727 (Engineering).

How long might review take?

After intake and invoice issuance, which the county says generally takes 2–4 business days, review begins when all fees are paid and can take up to 30 days. OSSF suitability plat review can take up to 45 days after fees are paid. Administratively complete plat packages are considered by Commissioners Court within 30 days. Residential and OSSF permits expire after 365 days of no activity; commercial/non-residential permits expire after 180 days of no activity.

How are inspections scheduled?

Apply through the Citizen Self-Service portal; it accepts permit and plan applications, schedules inspections, provides review comments and status, and accepts fees. For residential/OSSF questions contact Development Services at 972-548-5585 or DevelopmentServices@co.collin.tx.us; OSSF inspections use DevelopmentSvcInspections@co.collin.tx.us. Apply for a development permit first when a new structure will connect to a new OSSF; staff then sends the associated OSSF permit through the portal. Commercial applicants should contact the Fire Marshal’s Office at 972-548-5576.

Which codes and exemptions should I review?

In unincorporated Collin County and county-permitting ETJ areas, residential and non-residential projects that disturb ground or add a footprint require a county Development Services permit; commercial projects may also require Fire Marshal permits. New residential dwellings and substantial remodels require a third-party inspection under state law/County Court Order. County floodplain regulations prohibit new residential structures in a FEMA Special Flood Hazard Area and require applicable floodplain permits, elevations, and flood-damage measures. OSSF work is regulated under Texas Health and Safety Code Chapter 366, 30 TAC Chapter 285, and stricter county OSSF rules; no separate county ICC edition was published. Permits are generally not required for re-roofing, new electrical service on an existing structure, roof-mounted solar panels, water-heater replacement, or AC-unit changeout when the project does not disturb ground, add footprint, create a new tenancy, or otherwise meet the county’s extensive-remodel threshold. Non-residential examples also include antenna additions on an existing cell tower without a new ground footprint. County and municipal/ETJ requirements can still change the result.

Field sequencing matters

The inspector needs to see the work at the right moment.

Code compliance is not only a plan-review exercise. Footings, reinforcement, framing, fireblocking, wiring, piping, insulation, weather protection, and life-safety systems each have points where the work must remain accessible. Build the inspection calendar into the trade schedule instead of treating it as a final administrative step.

When a project qualifies for a narrow minor-work exemption, keep a written explanation of why it qualifies and confirm that related zoning, utility, fire, energy, or environmental rules do not create a separate approval requirement.

Closeout file

Keep the approved plan set, inspection approvals, correction responses, contractor license verification, final certificate, and any occupancy release together. A clean record protects the owner, builder, lender, insurer, and future buyer.