Bolthole Index

Montgomery County, Texas

Building permits, zoning and septic rules in Montgomery County, Texas

52Index Score / 100
#127 of 254 in Texas

Unincorporated Montgomery County, Texas requires a development permit for every residential structure or addition despite having no county land-use zoning12. Montgomery County does not enforce building codes for single-family homes, but selected building-code provisions apply to Fire Code occupancies34. Montgomery County Environmental Health Services handles septic approval for properties without public sewer56.

At a glance

Building / development permit
Required for every residential structure or addition outside city limits1
Residential building code
No code enforcement for single-family homes; selected codes cover Fire Code occupancies34
Zoning
No county land-use zoning; municipal zoning varies27
Septic permits
County permit, design, inspection and approval required for a new system89
RV / tiny home living
No county zoning restriction, but structures and wastewater still need applicable permits10111
Owner-builder
County development-permit exemption not confirmed; state trade-license exemptions are narrower12
Floodplain development
Permit required in the mapped floodplain; extra rules apply near its boundary1314
Driveway / culvert
Precinct 4 verification or inspection receipt may apply; no countywide rule confirmed15

Who to call

Building permits

Montgomery County Permit Department

Development (building) permits for any new structure or addition outside city limits, including single-family homes, additions, barns, sheds, and mobile homes. Commercial and rental structures (rental homes, RV parks, apartments, anything used for business) must instead permit through the Commercial Permit Office.

936-539-7836

501 North Thompson, Suite 100, Conroe, Texas 77301

Codes & inspections

Montgomery County Permit Department (Building Codes & Zoning)

The county's own written confirmation that it has no zoning and does not enforce a residential building code or issue certificates of occupancy, and that the Fire Marshal enforces fire and building code for qualifying commercial structures.

(936) 539-7836

501 N. Thompson, Suite 100, Conroe, Texas 77301

Septic permits

Montgomery County Environmental Health Services (On-Site Sewage Facilities)

OSSF (septic) permitting for property outside city limits, enforcing TCEQ's state OSSF statutes and regulations as the local authorized agent, plus a county Local Order with additional rules.

936-539-7839

501 N Thompson Street, Suite 101, Conroe, Texas 77301

Floodplain permits

Montgomery County Floodplain Administration

Floodplain determinations, floodplain development permits, and enforcement of Montgomery County's floodplain management regulations, including a ban on new or replacement septic systems within a floodway.

936-539-7836

501 North Thompson, Suite 100, Conroe, Texas 77301

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

Off-grid gear

Going off-grid in Montgomery County means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Montgomery County, Texas?

Yes. Every residential structure or addition in unincorporated Montgomery County needs its own county development permit; rental homes, apartments, RV parks, model homes and business structures follow the commercial route6. The residential structure fee is $150 outside the 100-year floodplain and $200 inside it, and county permitting fees are non-refundable16. A development permit expires 180 days after entry into the permitting system, regardless of whether review is pending, approved or denied17. Montgomery County has adopted only selected International Building Code provisions for buildings covered by its Fire Code; one- and two-family dwellings and multifamily buildings with three or fewer units are outside that Fire Code scope418. Buildings subject to Montgomery County’s Fire Code need Fire Marshal inspections and a Certificate of Compliance before occupancy1920. Cleveland, mainly in Liberty County but extending into Montgomery County, issues city building permits; Tomball, mainly in Harris County but extending into Montgomery County, requires a city permit to build or enlarge an RV park2122. Septic permits remain a separate Montgomery County Environmental Health responsibility5.

Who issues building permits in Montgomery County, and how do you reach them?

The Montgomery County Permit Department handles residential development permits at 501 North Thompson, Suite 100, Conroe, Texas 77301; call 936-539-783623. Rental homes, RV parks, apartments and structures used for business are commercial applications rather than ordinary homeowner applications6. Montgomery County Environmental Health Services administers OSSF permits as the county's local agent for TCEQ; its office is at 501 N Thompson Street, Suite 101, Conroe, Texas 77301, and its phone is 936-539-7839524. Montgomery County Floodplain Administration handles floodplain determinations and development requirements from Suite 100 at the same North Thompson address; call 936-539-783625. Ask the Permit Department whether an owner-builder development-permit exemption applies, because the available county materials do not confirm one; Texas trade-license exemptions for work on an owner's residence or homestead do not themselves erase the county development permit12.

Does Montgomery County have zoning?

Montgomery County does not administer county land-use zoning; the county rules here concern unincorporated land, while municipal zoning varies27. Cleveland, a city mainly in Liberty County that reaches into Montgomery County, administers its own zoning inside city limits26. County Environmental Health handles septic permits separately from municipal zoning5. No county zoning does not remove the development-permit requirement for structures or additions1. For unincorporated Montgomery County applications, a utility-district service letter documents district water or sewer service, and property without public sewer needs a septic permit27.

How do septic permits work in Montgomery County?

Montgomery County Environmental Health Services issues and approves septic permits as the local TCEQ agent5. A new system application requires a site evaluation and soil analysis, an OSSF design by a registered sanitarian or professional engineer, floor plans, floodplain information, the application fee and a $10 TCEQ assessment fee8. For new systems and add-on modifications, request the county inspection by 3:00 p.m. two business days before it is needed; do not backfill or use the system until the county approves it and issues a Notice of Approval9. Only about 2.2% of Montgomery County soils are rated without severe limits for a conventional drain field, so establish system feasibility and cost before buying28. A narrow state permit exemption can apply to one home on at least 10 acres only when all conditions are met, including a licensed site evaluation and keeping every OSSF component at least 100 feet from the property line11. Montgomery County does not permit a septic system in the regulatory floodway29.

Can you live in an RV or tiny home on your land in Montgomery County?

Unincorporated Montgomery County has no county zoning rule restricting RV, tiny-home, manufactured-home or temporary-camping occupancy, or setting minimum dwelling size, lot size, setbacks, lot coverage or building height10. Montgomery County still requires a development permit for each structure or addition, and processes RV parks as commercial development1. Land without public sewer must follow the county septic process unless all conditions of a state exemption apply2711. Ask Montgomery County Environmental Health Services about a composting toilet, privy or other alternative before relying on it as the parcel’s sewage solution24.

Building a home in Montgomery County: the steps, in order

  1. Confirm whether the parcel is unincorporated or under a municipality with its own zoning or documentation requirements7.
  2. Get the legal description, site plan or survey, new-development address verification, utility-district letter, and any applicable stormwater or culvert paperwork together17.
  3. Submit a separate development-permit application for every structure or addition and account for the 180-day expiration measured from system entry617.
  4. If public sewer is unavailable, complete the county septic design and permit process before construction278.
  5. Ask Floodplain Administration about a Class B development permit for land wholly or partly in a special flood hazard area; floodplain fill or excavation needs approval before work14.
  6. Arrange the septic inspection before backfill or use, and obtain the county's Notice of Approval9.
  7. For a state-highway driveway, obtain the TxDOT access permit; for county access, ask whether the parcel's precinct requires culvert verification3015.

What to check before you buy land in Montgomery County

Check wastewater feasibility before buying: only about 2.2% of Montgomery County soils are rated without severe limits for a conventional drain field, and a new system needs a site evaluation, soil analysis and professional OSSF design288. New septic installation and repair or replacement are prohibited in the floodway13. Structures in the 100-year floodplain or within 100 feet of its boundary require elevation or acceptable flood openings and a final elevation certificate13. Floodplain fill or excavation also needs a development permit and generally an engineer’s certification; an affected area of 15,000 square feet or less may qualify for a certification exemption, but still needs the permit14. Ask the relevant precinct about culvert documentation; the residential application identifies Precinct 4 verification or an inspection receipt where applicable15. We could not confirm a private-well permit rule; ask the Permit Department which water-service approvals your parcel needs23.

Watch-outs

  • Montgomery County Fire Code occupancies need a Certificate of Compliance before use; the requirement excludes one- and two-family dwellings and multifamily dwellings with three or fewer units20.
  • Montgomery County floodplain regulations invalidate a permit if work has not begun within 6 months of issuance or is suspended or abandoned for 1 continuous year; ask Floodplain Administration about written extensions14.
  • Montgomery County residential development fees are non-refundable, each permit fee must be paid separately, and the application packet sets expiration at 180 days from system entry regardless of review status16.

Sources

  1. Montgomery County Development Permit Procedures, quoted and re-checked
  2. Montgomery County PY 2023 Consolidated Annual Performance and Evaluation Report, quoted and re-checked
  3. Montgomery County Permit Department (Building Codes & Zoning) (mctx.org)
  4. Montgomery County Fire Code, quoted and re-checked
  5. How to Obtain a Septic Permit, quoted and re-checked
  6. Montgomery County Development Permit Procedures, quoted and re-checked
  7. Montgomery County Development Permit Procedures, quoted and re-checked
  8. How to Obtain a Septic Permit and On-Site Sewage Facility Fees, quoted and re-checked
  9. How to Obtain a Septic Permit, quoted and re-checked
  10. Texas law on county zoning and building authority
  11. Getting a Permit for an OSSF - Such as a Septic System, quoted and re-checked
  12. Exemptions to Electrician Licensing (2026 county census)
  13. Montgomery County Development Permit Procedures, quoted and re-checked
  14. Montgomery County Flood Plain Management Regulations, quoted and re-checked
  15. Montgomery County Drainage Criteria Manual, quoted and re-checked
  16. Montgomery County Development Permit Procedures, quoted and re-checked
  17. Montgomery County Development Permit Procedures, quoted and re-checked
  18. Montgomery County Fire Code, quoted and re-checked
  19. Montgomery County Fire Code, quoted and re-checked
  20. Montgomery County Fire Code, quoted and re-checked
  21. Cleveland: When Is A Permit Required? (Montgomery County), quoted and re-checked
  22. Tomball: Code § 26-58, Recreational vehicle parks—Construction or enlargement permits (Montgomery County), quoted and re-checked
  23. Montgomery County Permit Department (mctx.org)
  24. Montgomery County Environmental Health Services (On-Site Sewage Facilities) (mctx.org)
  25. Montgomery County Floodplain Administration (mctx.org)
  26. Cleveland: Chapter 126 - Zoning, Definitions (Montgomery County), quoted and re-checked
  27. Montgomery County Development Permit Procedures, quoted and re-checked
  28. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  29. How to Obtain a Septic Permit and On-Site Sewage Facility Fees, quoted and re-checked
  30. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked

Written October 11, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

Unlike 4 of its 6 neighbors, Montgomery County requires a building permit only in limited cases.

RuleMontgomery CountySan Jacinto CountyWalker CountyGrimes CountyHarris CountyLiberty CountyWaller County
Building permitLimitedLimitedNot requiredNot requiredLimitedRequiredRequired
County zoningNoNoNoNoNoNoNo
Septic permitsCounty Env. Health ServicesCounty Permit Dept.County On-Site WastewaterCounty Env. Services Div.County Office of the County EngineerCounty EngineeringCounty Env. Div.

County locator

Montgomery County in Texas

52
County map
Montgomery County highlighted among the Texas counties · colored by Index score

How Montgomery County scores

Seclusion19100% ev.
Self-Sufficiency64100% ev.
Admin Boringness7190% ev.
Durability59100% ev.
Property Autonomy71100% ev.
Carry Cost47100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$347kTypical home
1.6%Property tax
$13,070Land / acre
50.7"Annual rain
12.4% of yrsSevere drought
26 / yr (+20.7)Mid-century 100°F days
18.7 daysMid-century dry spell
2.85" (+5.3%)Mid-century 1-day rain
1.44×Wildfire change factor
100%Forward climate coverage
$2,140Home insurance / yr
1.6% / yrInsurance growth
0%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
142,334People within 30 min
8,716,304People within 2 hr
452,742Radius comparison (15 mi)
682.6People / sq mi
7.1%Federal land
100%Land at 15% slope or less
2.2%Soils rated "not limited" for septic (strict USDA rating)
14,320 acWorkable land screen
70%Wooded land
47.3 tonsBiomass / forest ac
68.8°FAvg temp

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Cities and towns in Montgomery County

Inside a city or town, that city usually issues building permits and sets zoning; the county’s rules above cover unincorporated land. Septic, wells and floodplain rules usually stay with the county or state everywhere.

Not yet researched: Cut and Shoot · Magnolia · Montgomery · Panorama Village · Patton Village · Town of Stagecoach · Woodbranch · Town of Woodloch

Answers from the rulebook for Montgomery County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Montgomery County rules

  • Building permitLimited

    Residential structures and additions subject to Montgomery County's development-permit procedure.

    • Every structure and addition requires its own permit.
    • Apartments, rental homes, model homes, RV parks, cell towers, construction trailers, and food trucks are treated as commercial in the county packet.
    • For property located in the jurisdiction of a city, additional documentation may be required.
    • If public sewer is not available, the property owner must apply for a septic permit.

    residential structure outside 100-year floodplain permit fee: 150 USD · residential structure inside 100-year floodplain permit fee: 200 USD

    “Every structure and/or addition requires its own permit.”
    One more reviewed finding on this topic
  • Building code adoptedPartial

    Buildings and structures subject to the Montgomery County Fire Code, especially commercial and other covered occupancies.

    • The Fire Code expressly excepts one-and-two-family dwellings, multifamily residential dwellings consisting of three or fewer units, and qualifying industrial facilities with an OSHA-compliant fire brigade and county exemption.
    • The source does not establish general residential building-code adoption for all structures.
    “Montgomery County has only adopted certain chapters of the International Building Code. Please refer to 102.4 Application of building code for chapters and sections that have been adopted.”
    One more reviewed finding on this topic
    • Partial — Buildings and structures regulated by the Montgomery County Fire Code in unincorporated Montgomery County.
      “Montgomery County has only adopted certain chapters of the International Building Code. Please refer to 102.4 Application of building code for chapters and sections that have been adopted.”
  • InspectionsLimited

    Structures and occupancies subject to the Montgomery County Fire Code.

    • The Fire Code requires associated inspections for covered structures and occupancies.
    • One-and-two-family dwellings and multifamily dwellings of three or fewer units are excepted from the Fire Code scope.
    “No building or structure shall be used or occupied, and no change in the existing occupancy classification or use of a building or structure or portion thereof shall be made, until a fire code inspection has been completed as approved and the Fire Marshal’s Office has issued a certificate of compliance as provided herein.”
    One more reviewed finding on this topic
    • Required — Construction regulated by the Montgomery County Fire Code.
      “It shall be the duty of the holder of the permit or their duly authorized agent to notify the Fire Marshal’s Office when work is ready for inspection. It shall be the duty of the permit holder to provide access to and means for inspections of such work that are required by this code.”
  • Certificate of occupancyLimited

    Occupancy of buildings or structures subject to the Montgomery County Fire Code.

    • The required document is called a Certificate of Compliance in the cited Fire Code.
    • A conditional certificate may be issued for safe partial occupancy before all work is complete, subject to written limitations and restrictions.
    • Fire Code exceptions include one-and-two-family dwellings and multifamily residential dwellings of three or fewer units.
    “No building or structure subject to this code shall be occupied prior to: [...] Issuance of a Certificate of Compliance by the Fire Marshal’s Office that indicates that applicable provisions of this code have been met.”
    One more reviewed finding on this topic
    • Required — Occupancy of buildings or structures regulated by the Montgomery County Fire Code.
      “The building or structure shall not be occupied prior to issuing a permit and the fire code official conducting associated inspections indicating the applicable provisions of this code have been met.”
  • County-wide zoningAbsent

    County-administered land-use zoning in Montgomery County, Texas.

    • This conclusion concerns Montgomery County's own land-use controls; it does not establish the rules of incorporated local governments.
    • Some of the County's local governments have zoning ordinances that may restrict building activities offering affordable housing.
    “The County does not have any land use controls (zoning) and there is no countywide building code.”
  • Local zoningVaries (with conditions)

    Local-government zoning within Montgomery County, aggregated countywide; individual local-government ordinances are administered by their respective local governments, not by Montgomery County.

    • Montgomery County itself has no land-use controls (zoning).
    • Most local governments in the County do not have localized building codes.
    • Some local governments have zoning ordinances that may restrict building activities that may offer affordable housing.
    “Most of the County’s local governments do not have localized building codes, although some do have zoning ordinances which may restrict building activities that may offer affordable housing.”
    One more reviewed finding on this topic
    • Varies (with conditions) — Aggregate conclusion for incorporated municipalities and other local jurisdictions within Montgomery County; the county packet states that property in a city jurisdiction may require additional documentation, while Texas municipal law separately authorizes municipal zoning.
      “The County does not have any land use controls (zoning) and there is no countywide building code. Most of the County’s local governments do not have localized building codes, although some do have zoning ordinances”
  • Zoning districts · by state lawNo county rule

    Unincorporated Montgomery County: no county rule sets this, because Montgomery County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). Montgomery County's own reviewed answer confirms it has no county-wide zoning.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Minimum dwelling size · by state lawNo county rule

    Unincorporated Montgomery County: no county rule sets this, because Montgomery County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). Montgomery County's own reviewed answer confirms it has no county-wide zoning.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Minimum lot size · by state lawNo county rule

    Unincorporated Montgomery County: no county rule sets this, because Montgomery County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). Montgomery County's own reviewed answer confirms it has no county-wide zoning.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Setbacks · by state lawNo county rule

    Unincorporated Montgomery County: no county rule sets this, because Montgomery County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). Montgomery County's own reviewed answer confirms it has no county-wide zoning.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Lot coverage · by state lawNo county rule

    Unincorporated Montgomery County: no county rule sets this, because Montgomery County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). Montgomery County's own reviewed answer confirms it has no county-wide zoning.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Building height · by state lawNo county rule

    Unincorporated Montgomery County: no county rule sets this, because Montgomery County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). Montgomery County's own reviewed answer confirms it has no county-wide zoning.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Living in an RV · by state lawNo county rule

    Unincorporated Montgomery County: no county rule sets this, because Montgomery County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). Montgomery County's own reviewed answer confirms it has no county-wide zoning.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Camping on your land · by state lawNo county rule

    Unincorporated Montgomery County: no county rule sets this, because Montgomery County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). Montgomery County's own reviewed answer confirms it has no county-wide zoning.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Tiny homes · by state lawNo county rule

    Unincorporated Montgomery County: no county rule sets this, because Montgomery County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). Montgomery County's own reviewed answer confirms it has no county-wide zoning.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Manufactured homes · by state lawNo county rule

    Unincorporated Montgomery County: no county rule sets this, because Montgomery County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). Montgomery County's own reviewed answer confirms it has no county-wide zoning.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Accessory dwellings · by state lawNo county rule

    Unincorporated Montgomery County: no county rule sets this, because Montgomery County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). Montgomery County's own reviewed answer confirms it has no county-wide zoning.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Who permits septicCounty (with conditions)

    On-site sewage facilities in Montgomery County.

    • County requirements must meet applicable TCEQ onsite sewage facility standards and Montgomery County rules.
    • Montgomery County Environmental Health issues permits and approvals.
    • Septic systems in the regulatory floodway are not permitted.
    “Once the system is approved by Montgomery County Environmental Health Department and permission is granted to back-fill, a NOTICE OF APPROVAL to operate the septic system will be issued.”
    2 more reviewed findings on this topic
    • County — On-site sewage facilities administered through Montgomery County Environmental Health Services.
      “We serve as the local agent for the Texas Department of State Health Services or DSHS and the Texas Commission on Environmental Quality (TCEQ) and enforce the National Flood Insurance Program (NFIP) regulations through the Federal Emergency Management Agency (FEMA).”
    • County (with conditions) — On-site sewage facilities administered by Montgomery County Environmental Health under TCEQ and county requirements.
      “Application fee plus a $10.00 assessment fee for TCEQ must be paid to the Montgomery County Environmental Health Department.”
  • Septic permitRequired

    Installation of new septic systems in Montgomery County.

    • A site evaluation and soil analysis are required.
    • An onsite sewage facility design by a Registered Sanitarian or Registered Professional Engineer is required.
    • Floor plans and floodplain status information are required.
    • The county will not issue permits for systems in the regulatory floodway.
    • A power of attorney is required when the applicant is not the property owner.
    • Application fees include a TCEQ assessment fee.

    TCEQ assessment fee for permit application: 10 USD

    “Application for a Permit to Construct may be made at the Montgomery County Permit Office located at 501 North Thompson, Suite 100, Conroe, Texas.”
    One more reviewed finding on this topic
    • Required — New or modified on-site sewage facilities where public sewer is unavailable or an onsite system is being installed.
      “In order to install a septic system in Montgomery County, the client must: [...] Application for a Permit to Construct may be made at the Montgomery County Permit Office located at 501 North Thompson, Suite 100, Conroe, Texas.”
  • Septic inspectionRequired

    New septic systems before backfilling or use.

    • A Notice of Approval must be obtained after installation and before the system is backfilled or used.
    • The inspection request must be made by 3:00 p.m. two business days before the inspection is needed.
    • The system must be approved by Montgomery County Environmental Health before operation.
    “A Notice of Approval MUST be obtained after the system is installed and before it is backfilled (covered) and/or used. To obtain this, a request must be made to the Montgomery County Environmental Health Department by 3 :00 p.m. two(2) business day prior to the day the inspection is needed.”
    One more reviewed finding on this topic
    • Required — Installation of new septic systems and add-on modifications to existing systems.
      “A Notice of Approval MUST be obtained after the system is installed and before it is backfilled (covered) and/or used. To obtain this, a request must be made to the Montgomery County Environmental Health Department by 3 :00 p.m. two(2) business day prior to the day the inspection is needed.”
  • Off-grid sanitationLimited

    Off-grid or on-site domestic sewage disposal in Montgomery County.

    • A septic permit and approved plan are generally required before construction, installation, alteration, extension, or repair.
    • A state 10-acre rule exemption may apply only when all listed TCEQ conditions are met, including a single-family dwelling on at least 10 acres, a licensed site evaluation, no nuisance or groundwater pollution, all OSSF parts at least 100 feet from the property line, on-property effluent disposal, and only one dwelling on the tract.
    • Montgomery County will not issue septic permits for systems within the regulatory floodway.

    minimum tract size for state 10-acre exemption: >= 10 acres (all TCEQ exemption conditions must also be met) · minimum OSSF distance from property line for state exemption: >= 100 feet (all OSSF parts)

    “An OSSF may be exempt from permitting if it complies with all other requirements, including planning, construction, and installation standards of 30 TAC 285 AND meets the “10 acre rule”:”
  • Mandatory utility hookupConditional

    Residential development permit applications in unincorporated Montgomery County.

    • A utility district letter dated within one year stating that water and/or sewer will be provided is required.
    • If public sewer is unavailable, the property owner must apply for a septic permit.
    • Private wells and public systems are identified as alternatives on the application.
    “Letter on letterhead (date within one year) from the Utility District stating water and/or sewer will be provided to property. [...] If public sewer is not available, property owner MUST apply for “Septic Permit.”, please see Septic Permit Checklist.”
  • Driveway accessLimited

    Driveway and cross-culvert design submitted to Montgomery County, including applicable precinct requirements.

    • The drainage manual is marked draft.
    • A driveway culvert schedule must be included in construction drawings.
    • Cross-culvert submissions require plan and profile sheets, culvert dimensions and materials, flowlines, headwalls, design-storm and 100-year hydraulic-grade lines, roadway profile, erosion protection, calculations, and construction details.
    • The residential permit packet specifically identifies a Precinct 4 Culvert Verification Form or Culvert Inspection Receipt when applicable.
    “Precinct 4 Culvert Verification Form or Culvert Inspection Receipt (if applicable).”
    One more reviewed finding on this topic
    • Limited — Residential development applications where county culvert verification applies.
      “Any septic / commercial application packet with a property located in Commissioner Precinct 4 must include a Verification Form or a Culvert inspection receipt from Precinct 4.”
  • Building in a floodplainRequired

    Structures, land, and other development in unincorporated areas within Montgomery County's jurisdiction that are subject to the county floodplain regulations.

    • The regulations apply to all unincorporated areas within Montgomery County, Texas.
    • The special flood hazard areas are based on FEMA's Flood Insurance Study for Montgomery County dated August 18, 2014, accompanying Flood Insurance Rate Maps, and revisions thereto.
    • No structure or land may be located, altered, or have its use changed without full compliance with the regulations and other applicable regulations.
    • The Flood Plain Administrator reviews, approves, or denies development permit applications.
    • A Class B permit applies to areas located in or partially in a special flood hazard area; for structures, a temporary permit may allow foundation construction, followed by a Class B permit after an elevation certificate and other documentation demonstrate compliance.
    • Fees are assessed for permits and the amount is established by Commissioners Court and may be amended from time to time.
    • For excavation or fill in the floodplain, a development permit must be obtained before the activity and a registered professional engineer must certify no increase in base flood elevation and no adverse drainage impact.
    • A development permit is not required for fill or excavation outside a special flood hazard area, a three-strand barbed wire fence, or removal of trees or other vegetation.
    • For affected fill or landscape alterations of 15,000 square feet or less, the engineer certification may be exempted, but the property owner must still obtain a development permit.
    • Encroachments in the adopted regulatory floodway are prohibited unless hydrologic and hydraulic analyses demonstrate no increase in flood levels; a development permit is required before placement of fill or other floodway encroachment.
    • A permit becomes invalid if authorized work has not commenced within six months of issuance, or if work is suspended or abandoned for one continuous year after commencement; written extensions may be allowed by the Flood Plain Administrator.

    FIS date: August 18, 2014 (The regulations also adopt accompanying FIRMs and revisions thereto.) · minimum permit commencement period: 6 months (Permit becomes invalid if work has not commenced within this period.) · maximum suspension or abandonment period after commencement: 1 year (Permit becomes invalid after continuous suspension or abandonment; written extensions may be allowed.) · fill or landscape alteration affected area for engineer-certification exemption: <= 15000 square feet (The property owner must still obtain a development permit.)

    “These regulations shall apply to all unincorporated areas within the jurisdiction of Montgomery County, Texas. [...] A development permit shall be required to ensure conformance with the provisions of these regulations.”
    2 more reviewed findings on this topic
    • Required — Development or work in the FEMA-designated 100-year floodplain and structures within 100 feet of its boundary.
      “Any structure placed or built in the 100 year floodplain or within 100 feet of the 100 year floodplain boundary as designated by FEMA must be elevated at least two (2) feet above the base flood elevation or have acceptable flood openings.”
    • Required — Development and structures in the 100-year floodplain or within 100 feet of its FEMA-designated boundary.
      “Any structure placed or built in the 100 year floodplain or within 100 feet of the 100 year floodplain boundary as designated by FEMA must be elevated at least two (2) feet above the base flood elevation or have acceptable flood openings.”
  • Permit feesPublished (with conditions)

    Residential development permit fees administered by Montgomery County, including structures inside or outside the 100-year floodplain.

    • Every structure and/or addition requires its own permit.
    • Apartments, rental homes, model homes, RV parks, cell towers, construction trailers, and food trucks are considered commercial.
    • Any development/work in the 100-year floodplain requires a permit and may require a Development Permit Non-Structure.
    • If public sewer is not available, the property owner must apply for a septic permit.
    • For property located in the jurisdiction of a city, other documentation may be required.
    • Each permit fee must be made separately.
    • All permitting fees are non-refundable, with no exceptions.
    • Development permits expire 180 days from the date they are entered into the county permitting system, regardless of review status.

    residential structure outside 100-year floodplain permit fee: 150 USD · residential structure in 100-year floodplain permit fee: 200 USD

    “RESIDENTIAL DEVELOPMENT: Structure out of 100 year floodplain: $150 Structure in 100 year floodplain $200”
    One more reviewed finding on this topic
    • Published (with conditions) — County development-permit and onsite-sewage permit fees.
      “RESIDENTIAL DEVELOPMENT: Structure out of 100 year floodplain: $150 Structure in 100 year floodplain $200”
  • Permit processPublished (with conditions)

    Residential development-permit applications in unincorporated Montgomery County.

    • Submit a completed Development Permit Application—Structure.
    • Submit stormwater compliance certification and maintenance declaration if applicable.
    • Submit utility-district letter, legal description, site plan or survey, any applicable culvert documentation, septic permit if public sewer is unavailable, and new-development address verification.
    • Permit information cannot be changed after generation; a new permit must be purchased.
    • Development permits expire 180 days after entry into the permitting system.
    • Permitting fees are non-refundable.
    “Development permits expire 180 days from the date they are entered into our permitting system, regardless of their review status (pending, approved, or denied).”

Texas rules that apply here

  • Owner-builder exemptionConditional

    An owner performing electrical, plumbing, or air-conditioning and refrigeration work on the owner's own residence or homestead in Texas.

    • Electrical work is exempt from state electrician licensing when performed on a dwelling the person owns and resides in.
    • Plumbing is exempt from state plumbing licensing when performed by the property owner in the property owner's homestead.
    • Air-conditioning and refrigeration contracting is exempt from the applicable state registration requirements when performed in a building owned solely by the person as the person's home.
    • These exemptions do not establish a blanket exemption for every construction trade or contractor-regulated activity.
    “A person who perform electrical work on a dwelling that they own and reside in is not required by the state to be licensed as electricians.”
    One more reviewed finding on this topic
    • Conditional — Electrical work on a dwelling owned and occupied by the property owner in Texas.
      “A person who perform electrical work on a dwelling that they own and reside in is not required by the state to be licensed”
  • Well permitLimited

    Drilling, equipping, operating, or completing a water well, or substantially altering a well or well pump, where the well is within a groundwater conservation district in Texas.

    • A groundwater conservation district must require a permit except as provided by Texas Water Code §36.117.
    • A district may not require a permit or permit amendment for maintenance or repair that does not increase production capability above the authorized or permitted production rate.
    • Permit applications must be in writing and sworn.
    • Whether a particular private well is exempt or subject to additional district requirements depends on the applicable groundwater conservation district's rules.

    permit application form: in writing and sworn

    “Except as provided by Section 36.117, a district shall require a permit for the drilling, equipping, operating, or completing of wells or for substantially altering the size of wells or well pumps.”
  • county zoning authorityLimited

    Texas counties adopting zoning regulations for specified unincorporated or otherwise specially defined areas.

    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    • Other Chapter 231 subchapters address special areas including the Amistad Recreation Area in Val Verde County, military zones, certain lakes, the El Paso Mission Trail Historical Area, Lake Somerville, and Falcon Lake in Zapata County.
    • The cited statute was enacted effective September 1, 1987; the Falcon Lake subchapter was added effective June 15, 2007, and amended effective September 1, 2009.

    Padre Island distance from publicly owned park or recreational development: <= 2 miles (Area must be outside a municipality and in Cameron or Willacy County.) · Padre Island distance from beach, wharf, or bathhouse: <= 2 miles (The beach, wharf, or bathhouse must be used by at least 500 persons annually.)

    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
    One more reviewed finding on this topic
    • Limited — County zoning authority over unincorporated land in Texas, where a specific statutory grant applies.
      “As you suggest, a county has very limited and specific zoning authority, and none that may be used to regulate construction or operation of the proposed facility.”
  • county building authorityLimited

    Texas counties adopting and enforcing fire-code building permits for specified buildings in unincorporated areas and applying residential building-code standards in certain counties.

    • Under Section 233.061, the county must have a population over 250,000 or be adjacent to a county with a population over 250,000.
    • Under Section 233.062, the fire code applies only to commercial establishments, public buildings, and multifamily residential dwellings consisting of four or more units constructed in an unincorporated area.
    • The fire code does not apply to an industrial facility having a fire brigade that conforms to Occupational Health and Safety Administration requirements.
    • A covered applicant must submit a plan and a commissioners-court-set application fee; the county must issue or deny the permit within 30 days, and failure to act within 30 days approves the construction for purposes of the subchapter.
    • The fire code must conform to the International Fire Code or Uniform Fire Code as those codes existed on May 1, 2005, or establish protective measures exceeding those standards; later editions may be adopted.
    • Residential standards under Section 233.152 apply only if the county adopts a resolution or order and the county is within 50 miles of an international border or has a population over 100.
    • Those residential standards apply only to new single-family-house or duplex construction beginning after September 1, 2009; manufactured or modular structures governed by Occupations Code Chapters 1201 or 1202 are excluded from the definition of new residential construction.
    • A municipality's building code controls in its extraterritorial jurisdiction, and Section 233.152 does not authorize county prior approval of new residential construction or county zoning regulations.
    • Fire-code inspection and permit fees may be charged under a fee schedule based on building type, limited to amounts necessary to administer and enforce the subchapter; inspection fees must be reasonable and reflect approximate inspection costs.

    county population threshold for fire-code authority: > 250000 persons (A county adjacent to a county over 250,000 also qualifies.) · multifamily residential dwelling threshold: >= 4 units (The fire code applies only to covered buildings constructed in an unincorporated area.) · residential-code border distance: <= 50 miles (Alternative qualification is county population over 100.) · application decision period: 30 days (If the commissioners court does not issue or deny the permit within 30 days after receiving the application and fee, construction is approved for purposes of the subchapter.) · residential standards effective construction date: > 2009-09-01 (Applies only to new residential construction that begins after September 1, 2009.)

    “The commissioners court of a county with a population of over 250,000 or a county adjacent to a county with a population of over 250,000 may adopt a fire code and rules necessary to administer and enforce the fire code. [...] The fire code applies only to the following buildings constructed in an unincorporated area of the county: (1) a commercial establishment; (2) a public building; and (3) a multifamily residential dwelling consisting of four or more units.”
    One more reviewed finding on this topic
    • Limited — County fire-code adoption and building-permit authority for specified buildings in unincorporated areas of qualifying Texas counties, including multifamily residential dwellings of four or more units.
      “The commissioners court of a county with a population of over 250,000 or a county adjacent to a county with a population of over 250,000 may adopt a fire code and rules necessary to administer and enforce the fire code.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Agricultural exemption — Agricultural exemptions from Montgomery County development, building, septic, or floodplain requirements.
  • Subdividing land — Subdivision or platting of land in unincorporated Montgomery County.
  • Short-term rentals — Short-term rental use in Montgomery County, including unincorporated areas and incorporated municipalities.

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Montgomery County, Texas

Is Montgomery County a good place to live off-grid or homestead?

Montgomery County scores 52/100 on the Bolthole Index, a solid county profile. Its strengths: low administrative friction for a quiet rural property and a stronger property-autonomy legal backdrop. Watch-outs: about 142,334 people within a 30-minute drive.

Do you need a building permit in Montgomery County, Texas?

Montgomery County requires a building permit only in limited cases (such as floodplains or specific zones), and it has no county-wide zoning. Onsite septic is permitted by Montgomery County Environmental Health Services (OSSF, TCEQ authorized agent). Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

Can you live in an RV or tiny home on your land in Montgomery County?

Living in an RV on your own land in Montgomery County is allowed: Unincorporated Montgomery County: no county rule sets this, because Montgomery County has adopted no county zoning ordinance (Texas law lets some counties zone, but this one has not). Montgomery County's own reviewed answer confirms it has no county-wide zoning. Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits. Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters. A tiny home is allowed. Confirm with the county before relying on it.

How much does land cost in Montgomery County, Texas?

Land in Montgomery County runs about $13,070 per acre, based on the latest county data.

What is the water situation in Montgomery County?

Montgomery County gets about 50.7" of rain a year, with severe drought in roughly 12.4% of years.

How remote is Montgomery County?

A representative private-land location has about 142,334 people within a 30-minute drive and 8,716,304 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

How Montgomery compares in Texas

Compare side-by-side →See all 254 Texas counties ranked →