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When a permit is required
Permit triggers and exempt work for Montgomery County
A development or structure permit is required for most new construction and major alterations in unincorporated Montgomery County. Floodplain permits required for work in designated flood zones. Septic permits required for on-site sewage facilities.
- Exempt Minor repairs and maintenance that do not alter structural integrity or systems
- Exempt Some accessory structures under certain size thresholds (verify with county)
- Exempt Interior non-structural work
Note: Exempt from permit requirements does not mean exempt from zoning and other county regulations. Confirm exemption status with Montgomery County Permit Department.
- Completed permit application
- Property survey or plat
- Construction plans (scope dependent)
- Site plan showing setbacks and lot coverage
- Proof of property ownership or authorization
- For septic: soil tests and system design
- Building code
- Montgomery County adopts the International Building Code series as amended for unincorporated areas.
- Permit validity
- Specific validity periods vary by permit type; confirm with County Permit Department.
- Owner-builder
- Owner-builders may submit their own applications; requirements vary by project type.
- Contractor requirements
- Contractors should hold valid Texas licenses (CSLB not applicable in Texas; check with county for any local licensing).
Source: Montgomery County Permit Department / Environmental Health / Floodplain Administration ↗
Application process
Typical processing: Variable by project type; typical residential development permits 5-10 business days upon complete submission.
- 01 Identify your project type: residential development, floodplain development, or on-site sewage facility (septic).
- 02 For residential development, apply through the Montgomery County Development Permits portal for a Montgomery County Residential Development Structure Permit.
- 03 For floodplain development in mapped flood hazard areas, submit floodplain permit application with proof of compliance.
- 04 For septic systems, submit septic permit application through Montgomery County Environmental Health.
- 05 Submit required supporting documents based on project type.
- 06 County staff reviews for completeness and routes to appropriate review departments.
- 07 Upon approval, obtain permit and proceed with construction in compliance with conditions.
Typical processing time: Variable by project type; typical residential development permits 5-10 business days upon complete submission.
Source: Montgomery County Permit Department / Environmental Health / Floodplain Administration ↗
Fee schedule
Montgomery County building permit fees
Payment method details available through County Permit Department.
Fees change periodically. Confirm at the official fee schedule ↗ before budgeting.
Required inspections
Scheduling and sequence
- 936-539-7836 (phone)
- Through county portal if available (online)
- Inspection hours
- Monday-Friday, standard business hours
Typical sequence: Inspection requirements vary by project type. Contact County Permit Department for specific sequence.
Source: Montgomery County Permit Department / Environmental Health / Floodplain Administration ↗
Frequently asked
Common questions about unincorporated Montgomery County permits
01 Do I need a building permit in unincorporated Montgomery County, TX? ▸
02 How much does a building permit cost in unincorporated Montgomery County, TX? ▸
03 How do I apply for a building permit in unincorporated Montgomery County, TX? ▸
04 How long does it take to get a building permit in unincorporated Montgomery County, TX? ▸
05 What work is exempt from building permits in unincorporated Montgomery County, TX? ▸
06 How do I schedule a building inspection in unincorporated Montgomery County, TX? ▸
Educational reference. Permit rules and fees change — confirm current requirements directly with Montgomery County Permit Department / Environmental Health / Floodplain Administration before applying. Jaspector is not legal advice.