Bolthole Index

Big Horn County, Wyoming

Zoning, building permits and septic rules in Greybull, Wyoming

Inside the Town of Greybull, Big Horn County, Wyoming, structural changes, additions, fences, roof replacement and concrete work need a town building permit, applied for at the town treasurer12. The town has its own zoning map3. Town water and sewer are billed monthly by the town4. We could not confirm septic rules inside town limits; ask Greybull Town Hall.

At a glance

Building permit
Required for structural changes, additions, fences, roofs and concrete work; apply at the town treasurer12
Zoning
Town zoning map exists; ordinance text not confirmed by us3
Setbacks
20 ft from curb or street, 5 ft side, 10 ft from alley right-of-way; 65% maximum lot coverage56
Permit fees
Set by the town council; schedule at town hall on request7
Water and sewer
Provided by the town and billed monthly4
Septic
Not confirmed inside town limits; Big Horn County issues septic permits in unincorporated areas8

Who to call

Building permits

Town of Greybull Town Hall

Building permit applications (through the town treasurer), utility service applications and the town zoning map

307-765-9431

24 South 5th St, Greybull, WY 82426

Codes & inspections

Town of Greybull building inspector

Plan review, permit signature and inspections for construction inside town limits

Septic permits

Big Horn County Land Planning Office

Septic permits for unincorporated Big Horn County; ask whether anything applies inside Greybull

307-568-2424

[email protected]

P.O. Box 29, 425 Murphy Street, Basin, WY 82410

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 Town of Greybull means bringing your own water and power. The kit we’d start with:

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.

Do you need a building permit in Greybull, Wyoming?

Yes, for most construction. In the Town of Greybull, anyone making structural changes, adding square footage, building a fence, replacing a roof or doing concrete work needs a building permit1. Fences and walls over 30 inches high also need a permit from the building official9. One-story detached tool sheds and playhouses with a projected roof area of 120 square feet or less are exempt1.

The town's building inspector enforces the codes the town adopted in its Town Code chapter 1510. We could not confirm which code edition applies; ask Town Hall. Starting work before getting a permit doubles the permit amount7.

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

Applications go to the town treasurer at11, and fees are paid when you apply212. Greybull Town Hall is at 24 South 5th St, Greybull, WY 82426, phone 307-765-943111. No building permits are issued without a plan or sketch showing property lines and the distance from buildings to property lines, including fences1.

Fees are set by the town council, and the fee schedule is available at town hall on request; we found no published amounts7. The building inspector inspects at times the inspector determines, with checkpoints such as footer, stem wall, headers, plumbing and electrical13.

Does Greybull have zoning, and what are the setbacks?

Greybull has its own zoning: the town's website links an official Town of Greybull Zoning Map next to its ordinances311. We could not read the zoning ordinance, so we cannot confirm district rules for RVs, tiny homes, accessory dwellings, minimum lot size or minimum home size. Ask Town Hall before you buy.

The town's building instructions set rules for all residential structures: 20 feet back from the curb or street, 5 feet from the neighboring property, and 10 feet from the alley right-of-way5. Structures may cover no more than 65% of the lot6. Where a driveway or alley meets a street, a clear vision zone of 10 feet into the lot and 20 feet along the street must stay open, with nothing solid over 36 inches14.

How do septic permits work inside Greybull?

The town provides water and sewer service, billed monthly with trash collection and mosquito abatement4. A new home on a lot that town sewer reaches would normally start with a utility service application at town hall4. We could not confirm a rule requiring connection, or who permits a septic system for a lot inside town limits.

Outside the town, Big Horn County Land Planning issues septic permits in unincorporated areas815. Call that office at 307-568-2424 and Town Hall at 307-765-9431 to learn which applies to a specific address1511.

Can you live in an RV or tiny home in Greybull?

We could not confirm Greybull's rules on long-term RV living, temporary camping, tiny homes or manufactured homes, because the town's zoning ordinance was not readable to us. Do not assume either answer. Ask Greybull Town Hall at 307-765-9431 which zoning district your lot is in and what that district allows11.

How do you build a home in Greybull, step by step?

  1. Ask Greybull Town Hall which zoning district the lot is in and whether town sewer is available11.
  2. Draw a plan or sketch showing property lines and distances to them1.
  3. Apply to the town treasurer and pay the fee2.
  4. Wait for the inspector's signature before any work begins2.
  5. Have each stage inspected as it is built13.
  6. Apply for water and sewer service at town hall4.

What stays with Big Horn County, and what to check before you buy?

Land outside Greybull's limits is governed by Big Horn County, which requires a development permit for building in rural areas but has no building codes there1617. See the Big Horn County page for rules on unincorporated land.

Inside town, ask Town Hall about floodplain, short-term rentals and subdivision rules, which we could not confirm. Big Horn County's effective property tax rate is 0.6%18.

Watch-outs

  • Fences are exempt under the town's PDF citation but Town Code 15.04.035 requires a permit for them, so get a permit before building one1.
  • Greybull's zoning ordinance text, minimum lot size and RV rules are unconfirmed; call Town Hall at 307-765-9431 before relying on any assumption11.
  • Big Horn County's rural rules do not apply inside Greybull town limits, and the town's rules do not apply outside them16.

Sources

  1. Town of Greybull Building Code Instructions (2023 updated), with Ordinance No. 873 and Greybull Town Code 18.44 fences (Town of Greybull), quoted and re-checked
  2. Town of Greybull Building Code Instructions (2023 updated), with Ordinance No. 873 and Greybull Town Code 18.44 fences (Town of Greybull), quoted and re-checked
  3. Town of Greybull homepage (Town of Greybull), quoted and re-checked
  4. Town of Greybull Utilities and Utility Payments (Town of Greybull), quoted and re-checked
  5. Town of Greybull Building Code Instructions (2023 updated), with Ordinance No. 873 and Greybull Town Code 18.44 fences (Town of Greybull), quoted and re-checked
  6. Town of Greybull Building Code Instructions (2023 updated), with Ordinance No. 873 and Greybull Town Code 18.44 fences (Town of Greybull), quoted and re-checked
  7. Town of Greybull Building Code Instructions (2023 updated), with Ordinance No. 873 and Greybull Town Code 18.44 fences (Town of Greybull), quoted and re-checked
  8. Septic Systems, quoted and re-checked
  9. Town of Greybull Building Code Instructions (2023 updated), with Ordinance No. 873 and Greybull Town Code 18.44 fences (Town of Greybull), quoted and re-checked
  10. Town of Greybull Building Code Instructions (2023 updated), with Ordinance No. 873 and Greybull Town Code 18.44 fences (Town of Greybull), quoted and re-checked
  11. Town of Greybull Town Hall (townofgreybull.com)
  12. Town of Greybull building inspector (townofgreybull.com)
  13. Town of Greybull Building Code Instructions (2023 updated), with Ordinance No. 873 and Greybull Town Code 18.44 fences (Town of Greybull), quoted and re-checked
  14. Town of Greybull Building Code Instructions (2023 updated), with Ordinance No. 873 and Greybull Town Code 18.44 fences (Town of Greybull), quoted and re-checked
  15. Big Horn County Land Planning Office (bighorncountywy.gov)
  16. Development Activities, quoted and re-checked
  17. Development Activities, quoted and re-checked
  18. 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 Town of Greybull

Town of Greybull’s own rules

  • Building permitRequired

    Structural changes, additions adding square footage, fences, roof replacement and concrete work inside Greybull town limits

    • Permit is applied for at the town treasurer and fees are paid at application.
    • The PDF Section 301 exemption list excludes one-story detached accessory buildings used as tool and storage sheds, playhouses and similar uses where the projected roof area does not exceed 120 sq. ft.; fences are exempt under the PDF citation but Greybull Town Code 15.04.035 requires a permit for fences.
    • No building permits are issued without a plan or sketch showing property lines and the distance from buildings to property lines, including fences.
    • Applies within Greybull town limits only.

    roof area exemption threshold for accessory tool sheds: <= 120 square feet (one-story detached accessory building used as tool and storage shed, playhouse or similar use)

    “if you are making structural changes to or adding square footage to a structure, building a fence, replacing a roof, or doing any type of concrete work you will need a building permit.”
    One more reviewed finding on this topic
  • Building code adoptedAdopted

    Construction inside Greybull town limits

    • The town building inspector enforces the codes adopted in Greybull Town Code chapter 15.
    • The cited text does not name the edition; the town PDF mentions a 2009 international building code in a garbled line, so the edition needs confirmation.
    “the building inspector is hereby authorized and directed to enforce all provisions of the codes adopted by chapter 15.”
  • InspectionsRequired

    Construction, remodeling and repairs that require a building permit inside Greybull town limits

    • The town building inspector inspects at the times the inspector determines during construction.
    • Inspection checklist items in the town PDF include footer, stem wall, headers, plumbing, and electrical, with contractor notice one day in advance.
    • Permit applicants consent to inspector entry onto the premises.
    “the building inspector shall have the further duty of inspecting all construction, remodeling and repairs which require a building permit or inspection”
  • Local zoningPresent

    Land inside Greybull town limits (Greybull town, Big Horn County, WY)

    • The town's homepage links an official Town of Greybull Zoning Map as a separate item beside its ordinances.
    • The zoning ordinance text itself was not retrieved; the Municode code page returned no readable text and the zoning map PDF returned no extractable text.
    “town of greybull ordinances town of greybull zoning map”
  • SetbacksSpecified

    Residential structures inside Greybull town limits, as stated in the town's building code instructions; the text does not split these by zoning district

    • The town PDF states that all residential structures will follow these rules.
    • Fences are subject to a separate clear-vision and location rule in Greybull Town Code 18.44 (fences not permitted in public right-of-way; 48 inches back from the curb line on streets).

    front setback from curb or street: 20 feet · side setback to neighboring property: 5 feet · alley setback from right-of-way: 10 feet

    “all structures will be set back 20 feet from the curb or streets.”
  • Lot coverageSpecified

    Residential structures inside Greybull town limits, as stated in the town's building code instructions

    • The town PDF states that all residential structures will follow these rules.
    • Not split by zoning district in the cited text.

    maximum lot coverage by all structures: <= 65 percent of total lot

    “all structures may not cover more than 65% of the total property.”
  • Mandatory utility hookupWater and sewer (with conditions)

    New home inside Greybull town limits where town water and sewer service is available

    • Water and sewer are both provided by the town and billed monthly together with trash and mosquito abatement.
    • Service starts by completing a utility service application at town hall.
    • The official utilities page states service availability and application, not a mandatory-connection distance rule; a mandatory-connection rule was not found.
    “water and sewer service, trash collection and mosquito abatement are included in the monthly billing.”
  • Driveway accessLimited

    Driveway and alley approaches onto town streets inside Greybull town limits

    • Sight-distance restriction only; no driveway permit or approach standard found.
    • Clear vision zone is 10 feet into the lot and 20 feet along the street, with no obstruction over 36 inches (a 42-inch non-solid fence is allowed).

    clear vision zone depth into lot: 10 feet · clear vision zone length along street: 20 feet · maximum solid obstruction height in clear vision zone: <= 36 inches (42-inch non-solid fence permitted)

    “on the street side of all lots where an alley or driveway enters the street right-of-way, a triangular clear vision zone shall be maintained.”
  • Permit feesVariable (with conditions)

    Building permit fees inside Greybull town limits

    • Fees are set by the town council and the schedule is available at town hall on request; no published fee amounts found online.
    • Starting work before obtaining a permit doubles the permit amount (Greybull Town Code 15.04.060 as amended by Ordinance No. 873).

    penalty for work begun before permit: 2 times permit amount

    “fees shall be set by the town council and fee schedule shall be available at town hall upon request.”
  • Permit processPartial

    Building permit process inside Greybull town limits

    • Applications go to the town treasurer and fees are paid at application.
    • Inspector signs the permit before work begins, after a plan or sketch showing property lines is submitted.
    • Full process steps and review timing are not in the opened sources.
    “application shall be made to the town treasurer and fees shall be paid at the time of application.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Town of Greybull or Big Horn County directly.

  • Owner-builder exemption — Owner-builder permit exemption inside Greybull town limits
  • Certificate of occupancy — Certificate of occupancy for new homes inside Greybull town limits
  • Minimum dwelling size — Minimum dwelling size for a single-family home inside Greybull town limits
  • Minimum lot size — Minimum lot size for the main single-family residential district inside Greybull town limits
  • Building height — Building height for residential structures inside Greybull town limits
14 more unanswered
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Agricultural exemption
  • Subdividing land
  • Building in a floodplain
  • Short-term rentals

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 Town of Greybull publishes no rule on the point, not that none exists. Big Horn County’s page lists the county offices to call.

← All of Big Horn County: county rules, score and offices