Fees, valuation & enforcement
Permit fees are a project input. Enforcement exposure is a project risk. Use the official schedule where available, then confirm valuation, trade permits, plan review, and inspection charges with the Authority Having Jurisdiction.
Official fee pathway
The final charge may depend on declared construction value, occupancy classification, square footage, plan review, state surcharges, trade permits, technology fees, and inspection activity. Do not use a neighboring city’s fee table as a substitute for this jurisdiction.
Fee desk contact
Development Services: 903-813-5275; OSSF Division: 903-813-4253 or 903-813-4247; county main: 903-813-4200
Ask the counter to confirm current charges before submitting a project with multiple trades or a change of use.
Financial exposure
Plan for building, mechanical, plumbing, electrical, fire, energy, zoning, septic, right-of-way, or other reviews that the project scope triggers. The lowest initial permit fee is not always the lowest project cost.
Enforcement exposure
When work begins without authorization, the agency may halt the site, require corrective plans, impose additional fees, withhold inspection release, or require concealed work to be exposed for review.
Closeout exposure
A missing final inspection or certificate can complicate occupancy, refinancing, sale, insurance, and utility connection. Preserve the approved plans and signed inspection record through closeout.
Professional field note
Even when a cosmetic or minor project does not require a building permit, zoning, floodplain, shoreline, historic, utility, fire, or right-of-way controls may still apply. Confirm the full jurisdictional picture before work starts.
Source trail
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.
Project questions
Grayson County Development Services / OSSF Division / Fire Marshal’s Office is the identified county-level authority for this profile. Confirm that the property is in its service area before filing.
Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact Development Services: 903-813-5275; OSSF Division: 903-813-4253 or 903-813-4247; county main: 903-813-4200.
Grayson County’s OSSF requirements state that processing may take five to seven days. The county’s 2026 fee order is effective after April 14, 2026; the published baseline fee schedule lists conventional OSSF fees from $310 per 0-1,000 gallons/day upward by flow, aerobic systems add $20, reinspection is $100, and online Development Certificate fees are $50.
Create an MGO account and apply online for planning/zoning or fire permits. For OSSF, submit a current 911 address and property ID, complete paperwork, a licensed site evaluation, and the appropriate fee. Non-standard/proprietary systems need professional design; proprietary systems require a two-year maintenance contract and an Affidavit to the Public. Do not begin construction until Authorization to Construct is issued. Contact the OSSF office at least one working day before the final inspection; the certificate of approval is mailed after approval. Floodplain development requires a Development Certificate/floodplain permit and Elevation Certificate where an SFHA is encroached.
Grayson County does not require building permits or certificates of occupancy for single-family residential structures. Its unincorporated-area Fire Marshal building permit applies to new commercial, public, and multifamily buildings of four or more units, moved buildings, and substantial improvements; the county fire code does not apply to single-family, duplex, triplex, or qualifying agricultural buildings. New/replacement septic systems require OSSF permits. OSSF rules incorporate 30 TAC Chapter 285 and county rules; the Commissioners Court adopted an April 2026 Development Services fee amendment. Single-family residential structures generally do not require a county building permit or certificate of occupancy. The county fire code does not apply to single-family dwellings, duplexes, triplexes, or purely agricultural buildings where no workers are present and the public does not enter. The county’s OSSF order requires application, permit, Authorization to Construct, and inspection for OSSF construction, alteration, extension, or repair regardless of tract size, so the ordinary state 10-acre exemption is not available under the county order.
Why permit costs vary
Building departments commonly calculate charges from valuation, occupancy, floor area, project type, plan review effort, trade scope, state surcharges, and inspection activity. A remodel that appears small on paper may still trigger structural, energy, fire, or utility review. Ask the permit counter which disciplines apply before you finalize the construction budget.
The same discipline applies to enforcement. Correcting unpermitted work after finishes are installed can require demolition, revised plans, additional inspections, and schedule disruption. Authorization is usually the less expensive project-management decision.