Bolthole Index

Clear Creek County, Colorado

Zoning, building permits and septic rules in Idaho Springs, Colorado

Idaho Springs, Colorado is zoned, and the city itself issues building permits inside city limits12. Septic permits for every address in Clear Creek County, city or not, come from the county's Environmental Health office3. Living in an RV on a private lot is allowed only by city permit, for no more than 6 consecutive months in a calendar year4.

At a glance

Zoning
Yes, the city's own zoning (Chapter 21 Land Development Regulations)1
Building permit
Required from the City of Idaho Springs before erecting or altering a structure2
Building code
2024 International Residential Code with local amendments5
Septic permit
Clear Creek County Environmental Health, city limits included3
RV living
Temporary only: one occupied travel trailer per parcel, by city permit, up to 6 months a year4
Accessory dwelling
One ADU per main dwelling in the districts reviewed6
Minimum home size
1,200 sq ft in R-E and 850 sq ft in R-1 for single-family homes7
Floodplain
A floodplain development permit is required in Special Flood Hazard Areas8

Who to call

Building permits

City of Idaho Springs City Clerk (building permit intake)

Building permit applications, contractor licenses, street, driveway and curb cut permits inside Idaho Springs city limits

303-567-4421

[email protected]

1711 Miner Street

Zoning

City of Idaho Springs Community Development

Planning, zoning, historic preservation review and land-use projects inside Idaho Springs

303.567.4421

1711 Miner Street

Septic permits

Clear Creek County Environmental Health

New septic construction, repairs and septic use permits anywhere in Clear Creek County, including inside Idaho Springs

(303) 679-2428

[email protected]

1111 Rose Street PO Box 2000 Georgetown, CO 80444

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 Idaho Springs means bringing your own water and power. The kit we’d start with:

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

Yes. Idaho Springs has its own zoning, and the city's code says no building, structure or land may be used or built on except in conformance with its regulations1. The city publishes an official zoning map and a permitted-uses list for each district9.

Dimensional rules change by district, so look up your parcel's district first. In the R-E district the minimum lot is 14,520 sq ft, and setbacks are 30 ft front, 20 ft rear and 15 ft side1011. In R-1 the minimum lot is 6,000 sq ft, with setbacks of 15 ft front, 15 ft rear and 5 ft side1011. Both districts cap height at 35 ft12 and require at least 50% of the lot to stay as open space13.

Single-family homes must be at least 1,200 sq ft in R-E and 850 sq ft in R-1, which rules out many tiny-home footprints inside the city7.

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

Yes. The City of Idaho Springs issues building permits inside city limits, and the city's building department page states that no structure may be erected, altered, used or occupied until a building permit has been issued by the city2. Idaho Springs adopted the 2024 International Residential Code with local amendments, including a ground snow load of 60 psf and a frost depth of 36 in.5.

Applications go through the City Clerk's office at City Hall, and every contractor who works in the city must hold an Idaho Springs contractor license2. Zoning and building permits are separate steps: the city's permitting rules say plans must conform to its zoning ordinances before a permit issues2. Clear Creek County's Building Department serves only unincorporated land, not addresses inside the city14.

We could not confirm the city's inspection stages, certificate of occupancy rules or any owner-builder exemption; ask the City Clerk.

How do septic permits work inside Idaho Springs?

Clear Creek County, not the city, regulates septic systems here. The county's onsite wastewater rules are effective in all areas of Clear Creek County, including incorporated areas3. Permits and inspections come from Clear Creek County Environmental Health in Georgetown15.

The county lists a $1,023 permit for a major construction involving 2 or more major components and a $600 permit for 1 major component, and notes that a permit may not be needed if the lot can connect to a sanitation district16. Colorado law ties building approval to either sewage treatment works service or an approved septic permit17.

Soils matter too: USDA rates 0% of Clear Creek County's soils as not limited for a conventional drain field, so expect a site evaluation and possibly an engineered system if your lot needs septic18. We could not confirm whether your specific lot can tie into city sewer; ask the city's water and wastewater office before you buy.

Can you live in an RV or tiny home in Idaho Springs?

RVs: only temporarily. Idaho Springs allows one occupied travel trailer per parcel, with the owner's consent, for a single period of no more than 6 consecutive months in a calendar year, and only by permit from the city4. The permit application is due soon after arrival, and outside that permit, occupancy is limited to a travel trailer park4.

Camping on public or private property inside the city needs permission of the property owner or an authorized officer19.

Tiny homes: we could not confirm a city rule for tiny homes as such, so a tiny home would be judged as a dwelling under the district minimums above7. Colorado does allow state-approved tiny homes for long-term living if they meet local zoning20.

Accessory dwellings: the city allows one ADU per main dwelling, with a 750 sq ft cap or 50% of the principal building, whichever is more6.

Building a home in Idaho Springs: the steps, in order

  1. Find your parcel's zoning district and permitted uses on the city's zoning map, and confirm the parcel is inside city limits9.
  2. Check lot size, setbacks and minimum home size for the district, such as R-E or R-110.
  3. If the lot is not on a sewer, get a soils evaluation and a septic permit from Clear Creek County Environmental Health15.
  4. Hire an Idaho Springs-licensed contractor2.
  5. Submit your building permit application to the City Clerk2.
  6. If any part of the site lies in a Special Flood Hazard Area, get a floodplain development permit before work begins8.
  7. Ask the City Clerk about inspections and final approval, since we could not confirm those stages2.

What stays with Clear Creek County, and what should you check before you buy?

The city's rules stop at city limits. For land outside Idaho Springs, see the Clear Creek County page, because the county's building and zoning rules apply only to unincorporated land14.

Inside the city, septic stays with the county3, and every new groundwater well needs a state well permit from the Division of Water Resources21.

Flood risk: the city's floodplain administrator is the Superintendent of the Public Works Department, and a floodplain development permit is required before work in a Special Flood Hazard Area8.

County-level numbers: Clear Creek County's effective property tax rate is 0.4%22, and the typical home value is $564,70523.

Watch-outs

  • Clear Creek County's building, planning and site-development offices serve unincorporated land only; inside Idaho Springs, start with the City Clerk and Community Development instead14.
  • We could not confirm the city's inspection stages, certificate of occupancy rules, short-term rental rules or permit fees; ask the City Clerk at City Hall before you budget2.
  • An RV stay on a private lot needs a city permit, and the application is due soon after arrival4.
  • Exterior work on a historic structure may need review by the city's Historic Preservation Review Commission, so call Community Development before you start9.

Sources

  1. Idaho Springs Municipal Code Sec. 21-4 General application (Idaho Springs), quoted and re-checked
  2. City of Idaho Springs City Clerk (building permit intake) (idahospringsco.com)
  3. Onsite Wastewater Treatment Systems, quoted and re-checked
  4. Idaho Springs Municipal Code Sec. 21-133 Restrictions (Idaho Springs), quoted and re-checked
  5. Idaho Springs Municipal Code Sec. 19-15 Amendments to the International Residential Code (Idaho Springs), quoted and re-checked
  6. Idaho Springs Municipal Code Sec. 21-15 Definitions (Idaho Springs), quoted and re-checked
  7. Idaho Springs Municipal Code Sec. 21-61 Minimum gross floor area (Idaho Springs), quoted and re-checked
  8. Idaho Springs Municipal Code Sec. 23-4 Definitions (flood damage prevention) (Idaho Springs), quoted and re-checked
  9. City of Idaho Springs Community Development (idahospringsco.com)
  10. Idaho Springs Municipal Code Sec. 21-63 Development standards (Idaho Springs), quoted and re-checked
  11. Idaho Springs Municipal Code Sec. 21-63 Development standards (Idaho Springs), quoted and re-checked
  12. Idaho Springs Municipal Code Sec. 21-63 Development standards (Idaho Springs), quoted and re-checked
  13. Idaho Springs Municipal Code Sec. 21-63 Development standards (Idaho Springs), quoted and re-checked
  14. Permits, quoted and re-checked
  15. Clear Creek County Environmental Health (clearcreekcounty.us)
  16. Onsite Wastewater Treatment Systems, quoted and re-checked
  17. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  18. 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
  19. Idaho Springs Municipal Code Sec. 17-88 Camping restrictions (Idaho Springs), quoted and re-checked
  20. Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
  21. Water Administration (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 Idaho Springs

Idaho Springs’s own rules

  • Building code adoptedAdopted

    Residential construction inside Idaho Springs city (2024 IRC with local amendments)

    • Local amendments include board of appeals (Variance Board), ground snow load 60 psf, frost depth 36 in., foundation and soils report rules.
    • Other technical codes not reviewed here.

    ground snow load: 60 psf · frost line depth: 36 in

    “The following amendments to the 2024 International Residential Code ("IRC") are hereby adopted:”
  • Local zoningPresent

    Land inside Idaho Springs city limits

    • Chapter 21 Land Development Regulations governs use of land and structures.
    “No building, structure or land shall be used and no building, structure or part thereof shall be erected, constructed, reconstructed, demolished, altered, repaired, moved or structurally altered except in conformance with the regulations herein specified”
  • Zoning districtsPublished

    Zone districts inside Idaho Springs city

    • Districts: R-E, R-1, R-2, R-3, R-M, HD, C-1, C-2, C-3, I-1, L-I, PD, Park, CONS, plus East End Overlay District (Chapter 26).
    “R-E 14,520 (⅓ acre) 100' 50% 30' 20' 15' 35' R-1 6,000 (b) 50' (b) 50% 15' 15' 5' 35'”
  • Minimum dwelling sizeDistrict specific (with conditions)

    Single-family dwellings in R-E (1,200 sq ft) and R-1 (850 sq ft) districts inside Idaho Springs city

    • R-2, R-3 and R-M single-family 850 sq ft; multifamily minimums by unit type.
    • F.H.A. or H.U.D. minimum requirement governs for units built under their programs.

    R-E single-family minimum: >= 1200 sq ft · R-1 single-family minimum: >= 850 sq ft (FHA/HUD governs for their programs)

    “District Dwelling Type Minimum Gross Square Footage R-E Single-family 1,200 R-1 Single-family 850 (a)”
  • Minimum lot sizeDistrict specific (with conditions)

    R-E (14,520 sq ft) and R-1 (6,000 sq ft) districts inside Idaho Springs city

    • R-1 area/width may be reduced to 4,400 sq ft and 37 ft for pre-existing single-family lots adjoined on both sides by structures or a street.
    • Commercial districts have no limit specified.

    R-E min lot area: >= 14520 sq ft · R-1 min lot area: >= 6000 sq ft (reduction for pre-existing lots)

    “R-E 14,520 (⅓ acre) 100' 50% 30' 20' 15' 35' R-1 6,000 (b) 50' (b) 50% 15' 15' 5' 35'”
  • SetbacksDistrict specific (with conditions)

    R-E (front 30, rear 20, side 15 ft) and R-1 (front 15, rear 15, side 5 ft) districts inside Idaho Springs city

    • Accessory structure front setbacks are 1½ times the table distance.
    • Side and rear setbacks for accessory structures and ADUs are 5 ft.
    • Permitted encroachments listed in note (f).

    R-E front/rear/side: 30/20/15 ft · R-1 front/rear/side: 15/15/5 ft

    “R-E 14,520 (⅓ acre) 100' 50% 30' 20' 15' 35' R-1 6,000 (b) 50' (b) 50% 15' 15' 5' 35'”
  • Lot coverageDistrict specific (with conditions)

    R-E and R-1 districts inside Idaho Springs city (minimum unobstructed open space)

    • Expressed as minimum proportion of lot in unobstructed open space (50%), not maximum coverage.

    minimum unobstructed open space: >= 50 percent

    “R-E 14,520 (⅓ acre) 100' 50% 30' 20' 15' 35' R-1 6,000 (b) 50' (b) 50% 15' 15' 5' 35'”
  • Building heightDistrict specific (with conditions)

    R-E and R-1 districts inside Idaho Springs city (35 ft maximum)

    • R-M district allows 45 ft; other districts differ.

    max height R-E and R-1: <= 35 ft

    “R-E 14,520 (⅓ acre) 100' 50% 30' 20' 15' 35' R-1 6,000 (b) 50' (b) 50% 15' 15' 5' 35'”
  • Living in an RVTemporary only (with conditions)

    Occupied travel trailers/RVs on private lots in all Idaho Springs districts

    • Occupancy otherwise only in a travel trailer park.
    • Not more than one occupied travel trailer per parcel, with owner consent, by City permit only.
    • Application must be made within seven days of arrival.
    • Stays in a travel trailer park limited to 14 days in any 60 consecutive days (Sec. 17-88(E)).

    max occupied period on private parcel: <= 6 consecutive months per calendar year (permit required)

    “not more than one (1) occupied travel trailer may be kept on a single parcel of privately owned property with the consent of the owner of the property for a single period of time not to exceed six (6) consecutive months in any calendar year, only by permit from the City”
  • Camping on your landLimited

    Camping on public or private property inside Idaho Springs city

    • Requires permission of the property owner or authorized officer.
    • Section does not apply to any dwelling as defined in Sec. 21-22.
    • Occupied travel trailers also governed by Sec. 21-133(B).
    “No person shall camp within any public or private property without first having obtained:”
  • Accessory dwellingsLimited

    Accessory dwelling units inside Idaho Springs city (R-E and R-1 per Sec. 21-61)

    • One ADU per main dwelling.
    • ADU minimum 200 sq ft in R-E and R-1.
    • Side and rear setbacks for ADUs are 5 feet.
    • Parking 1 per ADU only if parcel lacks off-street space, district requires parking, and block prohibits on-street parking.

    max ADU gross floor area: <= 750 sq ft or 50% of principal building, whichever is more

    “One (1) ADU is allowed per main dwelling.”
  • Building in a floodplainRequired

    Development within Special Flood Hazard Areas inside Idaho Springs city

    • Floodplain Administrator is the Superintendent of the Public Works Department.
    • Elevation, anchoring and flood-resistant construction standards apply in SFHAs.
    “Floodplain development permit. A permit required before construction or development begins within any Special Flood Hazard Area”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Idaho Springs or Clear Creek County directly.

  • Building permit — Building permits inside Idaho Springs city
  • Owner-builder exemption — Owner-builder exemption inside Idaho Springs city
  • Inspections — Building inspections inside Idaho Springs city
  • Certificate of occupancy — Certificates of occupancy inside Idaho Springs city
  • Tiny homes — Tiny homes inside Idaho Springs city
13 more unanswered
  • Manufactured homes
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Short-term rentals
  • Permit fees
  • 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 Idaho Springs publishes no rule on the point, not that none exists. Clear Creek County’s page lists the county offices to call.

← All of Clear Creek County: county rules, score and offices