Bolthole Index

Collin County, Texas

Zoning, building permits and land rules in Murphy, Texas

The City of Murphy, Texas, in Collin County, has its own zoning, and every use of land inside city limits must fit its zoning district1. Murphy's Development Services Department issues building permits and runs planning and zoning2. Travel trailers cannot be used as dwellings inside the city3. Septic authority inside city limits is unconfirmed; Collin County's septic program covers property outside city limits4.

At a glance

Zoning
Yes, city zoning districts with use charts15
Building permits
Issued by Murphy's Building Inspection division2
RV as a home
Travel trailers prohibited as on-site dwellings3
Minimum home size (SF-E and AG)
2,400 sq ft67
Sewer
Connection required where city sewer abuts the lot8
New water well
City building permit and location inspection first9
Septic inside city limits
Not confirmed; ask the city or Collin County4

Who to call

Building permits

City of Murphy Development Services (Building Inspection and Planning & Zoning)

Building permits and inspections for new homes, additions and remodels inside Murphy city limits, plus zoning, specific use permits, site plans and plats

972-468-4000

206 N. Murphy Rd. Murphy, TX 75094

Septic permits

Collin County Development Services (On-Site Sewage Facilities / OSSF Program)

Septic (OSSF) permits for property outside city limits; the place to ask who handles septic for an address inside Murphy

(972) 548-5585

4690 Community Ave., McKinney, Texas, 75071

Contact details are copied from each office’s official page and were checked against it on October 24, 2026.

Off-grid gear

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

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Does Murphy, Texas have zoning, and what does it mean for RVs and home size?

Yes. Murphy, Texas has city zoning: land and buildings inside city limits must be used only for the uses listed for their zoning district1. Use charts sort uses into permitted, prohibited and specific-use-permit categories by district5. Collin County's lack of zoning does not apply here; that statement covers only unincorporated land10.

Travel trailers, mobile homes and temporary buildings are prohibited as on-site dwellings inside Murphy city limits3. The minimum dwelling area is 2,400 square feet in the SF-E Single-Family Estate district6 and in the AG Agricultural district7. In SF-E the minimum front yard is 50 feet and the minimum rear yard is 25 feet for the main building11. In AG the minimum front yard is 50 feet12, and maximum lot coverage is 25%13. We could not confirm rules for tiny homes or accessory dwellings; ask Murphy's Planning and Zoning Division2.

Do you need a building permit in Murphy, and who issues it?

Murphy's own Building Inspection division issues building permits and performs inspections for new homes, additions and remodels, residential and commercial2. Inside city limits, Murphy's office is the one to call, not the county's development counter. The county's development permit applies to unincorporated Collin County14.

We could not confirm the city's general residential permit triggers, adopted building-code edition or owner-builder rules. Call Development Services at 972-468-4000 before you plan any work2. A new water well inside city limits needs a building permit from the city manager or designee, and the well location must be inspected by a public-works official before drilling9. Permit fees are published in the city's Appendix A fee schedule15.

How do septic and sewer work inside Murphy?

Owners and occupants of buildings in Murphy must connect to the city sanitary sewer if it is available in a street, alley or other public way abutting the platted premises8. On a lot with city sewer at the frontage, a septic system is therefore not the default plan.

We could not confirm which office permits a private sewage system inside city limits. Collin County's septic program, which acts under state rules plus a stricter county order, covers property outside city limits, and the county says another authorized agent may administer septic permits inside a city4. Ask Murphy Development Services first, then Collin County Development Services16. Texas requires a permit for any new or altered septic system, with a narrow exemption for a single home on a tract of at least 10 acres17.

Building a home in Murphy: the steps, in order

  1. Confirm the lot's zoning district and whether your use is allowed with Planning and Zoning2.
  2. Check minimum dwelling size and yard setbacks for that district6.
  3. Ask Development Services which building permits and inspections apply to your project2.
  4. Plan for city sewer if it abuts the lot8. If you want a private well, get the city building permit and location inspection first9.
  5. Call the Inspection Hotline at 972-468-4050 to schedule inspections2.

What stays with Collin County, and what should you check before buying in Murphy?

For land outside Murphy's city limits, the answers are different: unincorporated Collin County has no zoning, and a county development permit applies to projects that disturb ground or add footprint. See the Collin County page for those rules18. Confirm the address is inside city limits before relying on anything above.

The typical effective property tax rate in Collin County is 1.7%19. Because Murphy zoning rules vary by district, ask for a zoning verification for the exact lot from Planning and Zoning, and ask whether the lot is in a flood-hazard area; we could not confirm Murphy's flood-development permit rules2.

Watch-outs

  • Do not assume Collin County's no-zoning status applies in Murphy; the city has its own zoning districts and use charts1.
  • Travel trailers cannot be used as on-site dwellings in Murphy, and pre-existing ones that are moved may only leave the city3.
  • We could not confirm who permits private septic systems inside Murphy city limits; call Murphy Development Services at 972-468-4000 and Collin County Development Services at (972) 548-5585216.

Sources

  1. Article 30.06 Use Regulations — City of Murphy, TX (Murphy), quoted and re-checked
  2. City of Murphy Development Services (Building Inspection and Planning & Zoning) (murphytx.org)
  3. Article 24.05 Mobile Homes, Travel Trailers and Temporary Buildings — City of Murphy, TX (Murphy), quoted and re-checked
  4. Development Services: On Site Sewage Facilities, quoted and re-checked
  5. Article 30.06 Use Regulations — City of Murphy, TX (Murphy), quoted and re-checked
  6. Appendix A-1. Area Regulations — City of Murphy, TX (Murphy), quoted and re-checked
  7. Appendix A-1. Area Regulations — City of Murphy, TX (Murphy), quoted and re-checked
  8. Article 22.05 Sewer Connections — City of Murphy, TX (Murphy), quoted and re-checked
  9. Article 22.08 Water Wells — City of Murphy, TX (Murphy), quoted and re-checked
  10. collincountytx.gov, quoted and re-checked
  11. Appendix A-1. Area Regulations — City of Murphy, TX (Murphy), quoted and re-checked
  12. Appendix A-1. Area Regulations — City of Murphy, TX (Murphy), quoted and re-checked
  13. Appendix A-1. Area Regulations — City of Murphy, TX (Murphy), quoted and re-checked
  14. collincountytx.gov, quoted and re-checked
  15. Appendix A Fee Schedule — City of Murphy, TX (Murphy), quoted and re-checked
  16. Collin County Development Services (On-Site Sewage Facilities / OSSF Program) (collincountytx.gov)
  17. Getting a Permit for an OSSF - Such as a Septic System (Texas statewide rule), quoted and re-checked
  18. collincountytx.gov, quoted and re-checked
  19. Effective property tax rate: Bolthole Index county data

Written October 24, 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.

Answers from the rulebook for Murphy

Murphy’s own rules

  • Local zoningPresent (with conditions)

    Land and buildings inside Murphy city limits.

    • Uses and structures must conform to the use specified for the zoning district where located.
    “The use of land and/or buildings shall be in accordance with those listed in the following use charts. No land or building shall hereafter be used and no building or structure shall be erected, altered, or converted other than for those uses specified in the zoning district in which it is located.”
  • Zoning districtsPublished (with conditions)

    Land and buildings inside Murphy city limits.

    • Use charts classify permitted, prohibited, and specific-use-permit uses by zoning district.
    “The use of land and/or buildings shall be in accordance with those listed in the following use charts.”
  • Living in an RVProhibited

    Use of travel trailers as on-site dwellings within Murphy city limits.

    • Preexisting mobile homes, travel trailers, and temporary buildings are nonconforming; if moved, they may only be removed from city limits and may not be resituated within city limits.
    “Mobile homes, travel trailers or temporary buildings are prohibited within the city limits, and subsequent to the effective date of the ordinance from which this article derives it shall be unlawful for any person, group of persons, firm, corporation, entity, contractor, agent, servant or employee to bring, situate, or erect any mobile home, travel trailer or temporary building or any addition thereto, within the corporate city limits, for the purpose of an on-site dwelling.”
  • Well permitRequired

    Drilling a new water well within Murphy city corporate limits.

    • A building permit from the city manager or designee is required before drilling.
    • The well location must be inspected by a city public-works official before drilling.
    • The permit fee is the Appendix A fee-schedule amount.
    “It shall be unlawful for any person to drill or attempt to drill a new water well within the corporate limits of the city without first: Obtaining a building permit from the city manager or his designee; Having the location inspected by an official of the city’s public works department.”
  • Mandatory utility hookupSewer (with conditions)

    Buildings on platted premises inside Murphy city limits where city sanitary sewer is available in an abutting street, alley, or other public way.

    • Connection is required only where the city sanitary sewer system is available in a street, alley, or other public way abutting the platted premises.
    • Water closets must be connected under city-inspector supervision and according to plumbing, building, and other applicable city ordinances.
    “All owners or occupants of buildings, or agents of said owners, situated in any section of the city, shall connect to the city sanitary sewer system if the system is available in a street, alley or other public way abutting the platted premises on which the building is located.”
  • Permit feesPublished (with conditions)

    City permits, licenses, services, and programs inside Murphy city limits.

    • For outside services, consultants, or unlisted services, the city may charge 100% of outside-service or consultant charges, including actual, administrative, and overhead costs.
    “The following schedule of fees shall apply to the permits, licenses, services and programs provided by the city. In the occasion the city must hire an outside service or consultant to perform any of these services or any unlisted service, the city may charge the applicant 100% of the outside service or consultant charges including actual costs, administrative and overhead costs.”

Rules another office applies inside Murphy

Murphy does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

  • Minimum dwelling sizeSpecified

    AG Agricultural District inside Murphy city limits.

    • Appendix A-1 directs readers to the proper code section for asterisked details or exceptions.

    minimum dwelling area: 2400 sq ft

    “Min. dwelling area - sq. ft. 2400 2400 2400 2200 2200 2000 1800 1400 * PD only N/A N/A N/A N/A N/A”
    One more reviewed finding on this topic
  • SetbacksSpecified

    AG Agricultural District inside Murphy city limits.

    • The table directs readers to the proper code section for asterisked details or exceptions.

    minimum front yard: 50 ft · minimum rear yard: 20 percent (Table value is 20%.)

    “Min. front yard 50' 50' 40' 30' 25' 25' 25' 15' * 50' PD only 40'* 40'* 40'* 40'* 40'* [...] Min. rear yard 20% 25' 25' 20' 20' 20' 20' 15' * * PD only 100'* 100'* 100* 100* 150'*”
    One more reviewed finding on this topic
  • Lot coverageSpecified

    AG Agricultural District inside Murphy city limits.

    maximum lot coverage: <= 25 percent

    “Max. lot coverage 25% 25% 35% 35% 35% 35% 50% 50% 50% PD only 40%* 40%* 40%* 40%* 50%*”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Murphy or Collin County directly.

  • Building permit — General residential construction inside Murphy city limits.
  • Owner-builder exemption — Owner-built residential construction inside Murphy city limits.
  • Building code adopted — Construction inside Murphy city limits.
  • Inspections — General building work inside Murphy city limits.
  • Certificate of occupancy — Occupancy of buildings inside Murphy city limits.
14 more unanswered
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Building in a floodplain
  • Short-term rentals
  • Permit process

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.

Unanswered questions are usually a sign that Murphy publishes no rule on the point, not that none exists. Collin County’s page lists the county offices to call.

← All of Collin County: county rules, score and offices