Digital permit application gateway
Start with the issuing authority’s own submission lane. A complete application package, accurate valuation, and accessible inspection path are the fastest route through statutory plan review.
Recommended first click
Use the official digital gateway to submit plans, monitor review comments, pay required charges, and request inspections when the permit is issued. If the link is unavailable, use the agency website or phone number on the administrative profile to confirm the current lane.
Typical review lane
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.
Treat this as a planning signal, not a guaranteed approval date. Completeness, corrections, resubmittals, and agency workload control the actual clock.
Verify the parcel is inside this agency’s service area and note whether a city, state, fire marshal, septic authority, or utility district also has approval authority.
Prepare legible plans, site information, project valuation, ownership authorization, contractor information, and any energy, floodplain, zoning, or utility documentation the issuing office requires.
Keep the permit number, approved plan set, correction comments, fee receipts, and inspection results together. Those records establish the compliance trail for the next trade.
Application documents
Before submission, call Development Services: 903-813-5275; OSSF Division: 903-813-4253 or 903-813-4247; county main: 903-813-4200 if the project involves a change of occupancy, structural alteration, accessory structure, demolition, or work near a regulated environmental feature.
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.
What makes an application complete
Before you click submit, make sure the drawings agree with the site plan, project description, valuation, ownership authorization, and contractor information. If the work changes structure, occupancy, drainage, fire protection, energy performance, or utility demand, describe that scope plainly. Ambiguous narratives create correction cycles and delay the field schedule.
Save the confirmation number, payment receipt, uploaded plan set, and every correction comment. Those records are the backbone of a defensible compliance file when multiple trades or agencies share responsibility.
Submission quality check
Site: address, parcel, access, setbacks, and existing conditions are consistent.
Scope: structural, mechanical, plumbing, electrical, fire, and energy work is identified.
Closeout: inspection contacts and the final approval path are understood before work begins.