Bolthole Index

Grand County, Colorado

Zoning, building permits and RV rules in Hot Sulphur Springs, Colorado

The Town of Hot Sulphur Springs, Colorado has its own zoning code and requires a town building permit for every building and structure12. Grand County approval is a precondition of the town permit2. Septic permits inside the town are unconfirmed; ask the Grand County Building & Sanitation Division, which is the county's septic office3.

At a glance

Building permit
Required for every building and structure inside town limits, plus Grand County approval2
Zoning
Town zoning with districts R-1, R-2, R-3, M, B and O1
Who inspects and issues
Grand County Building Division is the authority having jurisdiction inside town limits4
Septic
Not confirmed for town lots; Grand County Building & Sanitation Division handles septic for the county3
RV while building
Owner only, up to 365 days, with prior commission approval5
Minimum home size
500 sq ft of floor area, measured on outside walls6
R-1 lot size
6,250 sq ft subdivided; 2 acres unsubdivided7
R-1 setbacks
Front 20 ft, side 7 ft, rear 10 ft8

Who to call

Zoning

Town of Hot Sulphur Springs (Town Hall)

Town zoning, the local building permit application and town business records

(970) 725-3933

513 Aspen Street, Hot Sulphur Springs, CO 80451

Building permits

Grand County Building & Sanitation Division

Building permits, plan review and inspections, including inside Hot Sulphur Springs; septic permits as the Grand County Sanitarian

970-725-3255

308 Byers Avenue, Hot Sulphur Springs, CO 80451

Contact details are copied from each office’s official page and were checked against it on October 16, 2026.

Off-grid gear

Going off-grid in Town of Hot Sulphur Springs means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Hot Sulphur Springs, Colorado?

Yes. Hot Sulphur Springs requires a separate town permit before any building or structure is erected, altered, moved or demolished2. The rule reaches accessory buildings of any size, fences, retaining walls, roofs and agricultural buildings2.

The town permit sits on top of a Grand County permit, not in place of it, and county approval comes first2. The town has 30 days from accepting a completed application to review it9. Denials must be explained in writing and can be appealed to the Board of Trustees9. Fee amounts are set by Board of Trustees resolution; we could not confirm them, so ask Town Hall10.

Who issues building permits in Hot Sulphur Springs?

The Grand County Building & Sanitation Division is the Authority Having Jurisdiction for properties inside Hot Sulphur Springs town limits, and all permit applications are submitted online4. The town itself adopted the Grand County Building Code by reference11. Town Hall at 513 Aspen Street, phone (970) 725-3933, is the contact for the town's side of the permit12.

We could not confirm who performs building inspections inside town limits or how certificates of occupancy are issued; the town's code only mentions site inspection fees. Ask Town Hall and the county Building Division which of them inspects your project.

Does Hot Sulphur Springs have zoning, and what does it mean for lot size and setbacks?

Yes. The town has its own zoning regulations with districts R-1, R-2, R-3, M, B and O, and a use schedule marks each use as permitted by right, by special review or prohibited113. Grand County's zoning applies only to unincorporated land, so look up your parcel on the town's code, not the county's14.

In the R-1 district, lots need 6,250 square feet on subdivided land or 2 acres on unsubdivided land, and 200 feet of width on unsubdivided land7. R-1 setbacks are 20 feet front, 7 feet on the sides and 10 feet at the rear8. Buildings may cover up to 30% of an R-1 lot, accessory buildings included15, and may rise 35 feet16. Every dwelling unit needs at least 500 square feet of floor area measured on the outside walls6.

How do septic permits work in Hot Sulphur Springs?

We could not confirm septic rules for lots inside town limits; check whether your lot is on town sewer before you buy. Colorado requires an onsite wastewater permit from the local public health agency before a building not served by a sewage treatment works can be built or remodeled17. In Grand County, the Building & Sanitation Division reviews engineered designs, issues septic permits and inspects them3, and the county notes that its septic application jurisdiction is unincorporated Grand County18. Call the Division at 970-725-3255 to learn how a town lot is handled4. Wells need a state permit from the Division of Water Resources19; we could not confirm town well rules.

Can you live in an RV or tiny home in Hot Sulphur Springs?

Only briefly. On residential lots (R-1, R-2, R-3), camping and overnight stays in travel trailers and truck campers are prohibited unless the owner is living there temporarily while building a home5. That exception lasts up to 365 calendar days and needs written approval from the Planning and Zoning Commission before you move in5. Commercial camping areas in the Open District require Board of Trustees site plan approval, public water and sewer, and stays of no more than 15 days20.

We found no tiny-home provision in the town code; a tiny home on a foundation would still need to meet the 500 square foot minimum6. Ask Town Hall before you buy.

Building a home in Hot Sulphur Springs: the steps, in order

  1. Confirm your parcel's zoning district against the town's use schedule13.
  2. Check lot size, setbacks and the 500 square foot minimum for your district6.
  3. Apply online to the Grand County Building & Sanitation Division, whose approval comes first42.
  4. Get the town building permit from Town Hall; the town has 30 days to review a complete application9.
  5. If you will live in an RV during construction, get Planning and Zoning Commission approval before moving in5.
  6. Ask the Building & Sanitation Division about septic or sewer before you pour a foundation3.

What stays with Grand County, and what to check before you buy

Land outside town limits follows Grand County's rules, not the town's; see the Grand County page. Septic is the main county or state matter3. A driveway onto a state highway needs a state access permit21, and the county says a county driveway permit is not required inside town limits4.

For context, Grand County's effective property tax rate is 0.3%22, and the typical home value is about $757,88623. Floodplain rules inside town are unconfirmed; ask Town Hall and the county Floodplain Administrator.

Watch-outs

  • Town and county both review your building permit, and county approval comes first2.
  • We could not confirm septic permits, inspections, certificates of occupancy or owner-builder rules inside town limits; call Town Hall and the Grand County Building & Sanitation Division4.
  • Camping in an RV on a residential lot is prohibited except for the owner during construction, with prior commission approval5.

Sources

  1. Hot Sulphur Springs Municipal Code 9-6-3 Zone district use schedule (Town of Hot Sulphur Springs), quoted and re-checked
  2. Hot Sulphur Springs Municipal Code 8-1-7 Local building permit (Town of Hot Sulphur Springs), quoted and re-checked
  3. co.grand.co.us, quoted and re-checked
  4. Grand County Building & Sanitation Division (co.grand.co.us)
  5. Hot Sulphur Springs Municipal Code 9-6-4 R-1 Residential District (Town of Hot Sulphur Springs), quoted and re-checked
  6. Hot Sulphur Springs Municipal Code 9-3-1 Definitions (Town of Hot Sulphur Springs), quoted and re-checked
  7. Hot Sulphur Springs Municipal Code 9-6-4 R-1 Residential District (Town of Hot Sulphur Springs), quoted and re-checked
  8. Hot Sulphur Springs Municipal Code 9-6-4 R-1 Residential District (Town of Hot Sulphur Springs), quoted and re-checked
  9. Hot Sulphur Springs Municipal Code 8-1-7 Local building permit (Town of Hot Sulphur Springs), quoted and re-checked
  10. Hot Sulphur Springs Municipal Code 8-1-7 Local building permit (Town of Hot Sulphur Springs), quoted and re-checked
  11. Hot Sulphur Springs Municipal Code 8-1-1 Adoption of Grand County Building Code (Town of Hot Sulphur Springs), quoted and re-checked
  12. Town of Hot Sulphur Springs (Town Hall) (townofhotsulphursprings.colorado.gov)
  13. Hot Sulphur Springs Municipal Code 9-6-3 Zone district use schedule (Town of Hot Sulphur Springs), quoted and re-checked
  14. Planning & Zoning, quoted and re-checked
  15. Hot Sulphur Springs Municipal Code 9-6-4 R-1 Residential District (Town of Hot Sulphur Springs), quoted and re-checked
  16. Hot Sulphur Springs Municipal Code 9-6-4 R-1 Residential District (Town of Hot Sulphur Springs), quoted and re-checked
  17. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  18. Septic Permit Information, quoted and re-checked
  19. Water Administration (Colorado statewide rule), quoted and re-checked
  20. Hot Sulphur Springs Municipal Code 9-6-4 R-1 Residential District (Town of Hot Sulphur Springs), quoted and re-checked
  21. Access Permits | Frequently Asked Questions (Colorado statewide rule), quoted and re-checked
  22. Effective property tax rate: Bolthole Index county data
  23. Typical home value (Zillow): Bolthole Index county data

Written October 16, 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 Hot Sulphur Springs

Town of Hot Sulphur Springs’s own rules

  • Building permitRequired

    All buildings and structures inside Hot Sulphur Springs town

    • Local town permit is in addition to, not a substitute for, a Grand County building permit.
    • County approval is a precondition of the town permit.
    • Applies to accessory buildings of any size, fences, retaining walls, roofs and agricultural buildings.
    “no building or structure shall be erected, constructed, enlarged, altered, repaired, moved, improved, removed, converted or demolished unless a separate permit for each building or structure has first been obtained from the town.”
  • Building code adoptedAdopted

    Building construction inside Hot Sulphur Springs town; town adopts the Grand County Building Code

    • Grand County code adopts 2015 IRC, IBC, IMC, IPC, IFGC, IECC, IEBC and IFC, 2017 NEC, with local amendments per Grand County Resolution 2018-5-31 and Ordinance No. 21.
    “the grand county building code, adopted by the board of county commissioners of the county of grand, state of colorado, by resolution 2018-5-31 and ordinance no. 21, and exhibit a thereof, is hereby adopted by reference as a primary code”
  • Local zoningPresent

    Land inside Hot Sulphur Springs town limits; Title 9 Zoning Regulations with districts R-1, R-2, R-3, M, B, O

    “The following table indicates which land uses are permitted by right, which are permitted by special review and which are prohibited uses”
  • Zoning districtsPublished

    Zoning districts R-1, R-2, R-3, M, B and O inside Hot Sulphur Springs town

    • Use schedule gives R (by right), S (special review) or P (prohibited) per district.
    “key: r = use permitted by right p = use prohibited s = use permitted by special review”
  • Minimum dwelling sizeSpecified

    All dwelling units inside Hot Sulphur Springs town, including R-1 (also R-2 and R-3 at 500 sq. ft. per unit)

    • Measured on the outside walls.

    minimum floor area per dwelling unit: >= 500 sq ft

    “all dwelling units shall contain at least five hundred (500) square feet of floor area measured on the outside walls.”
  • Minimum lot sizeSpecified

    R-1 Residential District inside Hot Sulphur Springs town

    • R-2 and R-3 single-family standards are the same as R-1.
    • Minimum lot width 50 ft subdivided, 200 ft unsubdivided.

    minimum lot area per unit, subdivided land: >= 6250 sq ft · minimum lot area per unit, unsubdivided land: >= 2 acres

    “minimum lot area per unit subdivided land 6,250 sq. ft. unsubdivided land 2 acres minimum lot width subdivided land 50 ft. unsubdivided land 200 ft.”
  • SetbacksSpecified

    R-1 Residential District inside Hot Sulphur Springs town

    • Canopies, eaves and roof overhangs may extend into a required yard not more than 3 feet.
    • Infill averaging rule for front setback applies.
    • Accessory buildings not allowed in front yard or any easement.

    front setback: >= 20 ft · side setback: >= 7 ft · rear setback: >= 10 ft

    “minimum setbacks front 20 ft. side 7 ft. rear 10 ft.”
  • Lot coverageSpecified

    R-1 Residential District inside Hot Sulphur Springs town

    • Accessory buildings count toward maximum lot coverage.
    • R-2 allows 40% and R-3 allows 30%.

    maximum lot coverage: <= 30 percent

    “maximum lot coverage 30% minimum floor area per unit 500 sq. ft. maximum building height 35 ft.”
  • Building heightSpecified

    R-1 Residential District inside Hot Sulphur Springs town (R-2 and R-3 also 35 ft)

    maximum building height: <= 35 ft

    “maximum lot coverage 30% minimum floor area per unit 500 sq. ft. maximum building height 35 ft.”
  • Living in an RVLimited

    Travel trailers and truck campers on residential zoned lots (R-1, R-2, R-3) inside Hot Sulphur Springs town

    • Allowed only for the property owner as temporary residency during construction of a residential structure on the lot.
    • Maximum 365 calendar days.
    • Written application to and approval by the Planning and Zoning Commission before occupancy.
    • Unoccupied travel trailers may be stored on the premises of an occupied residential lot (9-7-9(D)).

    temporary residency during construction: <= 365 calendar days

    “on any residential zoned lot, use of travel trailers and truck campers for camping and overnight stays shall be prohibited unless such use is by the property owner for the purpose of temporary residency for a period not exceeding three hundred sixty-five (365) calendar days during construction of a residential structure on the lot and written application to and approval by the planning and zoning commission is obtained prior to such temporary occupancy.”
  • Camping on your landLimited

    Camping and overnight stays on residential zoned lots inside Hot Sulphur Springs town

    • Prohibited except owner's temporary residency during home construction, up to 365 days, with prior Planning and Zoning Commission approval.
    • Commercial camping areas in the Open District require site plan approval by the Board of Trustees, public water and sewer, and a 15-day maximum stay.
    “occupants of such camping areas shall not reside within the same area for a period exceeding fifteen (15) days.”
  • Permit feesVariable (with conditions)

    Building permit fees inside Hot Sulphur Springs town

    • Town fees are set by Board of Trustees resolution and paid at application submittal.
    • County building permit fees follow the County's approved fee schedule.
    • Fee amounts not located.
    “the board of trustees shall establish, by resolution, application and site inspection fees to cover the administrative costs associated with review of a building permit application”
  • Permit processPartial

    Local building permits inside Hot Sulphur Springs town

    • County permit approval is a precondition.
    • Denial must be justified in writing; appeals go to the Board of Trustees.

    town review period: <= 30 days (from acceptance of a completed application)

    “the town shall have thirty (30) days from the date of acceptance of a completed application in which to review a permit application.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Town of Hot Sulphur Springs or Grand County directly.

  • Owner-builder exemption — Owner-builder exemptions inside Hot Sulphur Springs town
  • Inspections — Building inspections inside Hot Sulphur Springs town
  • Certificate of occupancy — Certificates of occupancy inside Hot Sulphur Springs town
  • Tiny homes — Tiny homes inside Hot Sulphur Springs town
  • Manufactured homes — Manufactured homes inside Hot Sulphur Springs town
12 more unanswered
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • 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 Hot Sulphur Springs publishes no rule on the point, not that none exists. Grand County’s page lists the county offices to call.

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