Bolthole Index

Union County, Iowa

Building permits, zoning and land rules in Creston, Iowa

Creston, Iowa requires building permits for new buildings, enlargements, structural changes and major residential remodeling.1 Creston administers its own zoning code inside city limits in Union County.2 Union County Environmental Health handles private sewage disposal regulation, but sewer availability must be resolved before planning a septic system.34

At a glance

Building permits
Required for new buildings, enlargements, structural changes and major residential remodeling1
Zoning
City zoning districts apply inside Creston2
RV living
Prohibited except as otherwise provided by state law and city regulations5
Manufactured homes
Conditional outside approved parks; foundation, dimensions and tax conversion requirements apply6
Septic permits
Union County Environmental Health; first resolve public sewer availability34
Private wells
County health department construction permits for qualifying private wells7

Who to call

Building permits

Creston Building and Code Compliance Department

City building permits, zoning questions and setback requirements

641-782-2000 Ext. 205

[email protected]

Building permits

Creston Building Inspections — Veenstra & Kimm

City building inspection contact

515-850-2980

Septic permits

Union County Environmental Health

Septic (private sewage disposal) permits and inspections, and private well construction permits, for Union County

(641) 782-7803

[email protected]

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

Off-grid gear

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

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Do you need a building permit in Creston, Iowa?

Creston requires a building permit when you build a new building, enlarge an existing building or change its structural characteristics.1 Major residential remodeling and any commercial or industrial remodeling also require a building permit in Creston.1 Creston has adopted building-code enforcement procedures, and applicable building permits must comply with the city zoning code.81 Before committing to a design, ask the city Building and Code Compliance Department which building and trade applications your project needs.9

Who issues building permits and handles building inspections in Creston?

Start with Creston’s Building and Code Compliance Department for construction permits, zoning questions and setback requirements.10 The city’s Code Compliance & Building page provides an Application for Building Permit alongside trade, demolition and sewer permit forms.9 Creston lists Veenstra & Kimm as the building inspections contact.11 Ask that inspection office for the required inspection stages before scheduling construction; we could not confirm the complete inspection sequence.9 For owner-performed residential work, ask the city which work you may perform and which building or trade permits remain necessary.9

Does Creston have zoning, and what are the R-1 setbacks?

Creston has municipal zoning districts; the district assigned to a parcel matters before choosing a house footprint.2 In Creston’s R-1 Single-Family Residential District, the minimum front yard is 25 feet on residential streets and 40 feet on collector streets or higher classifications.12 R-1 side yards generally require 7 feet on each side, and the rear yard must be 30 feet or 20% of lot depth, whichever is greater.12 Qualifying narrow existing lots have a side-yard exception, and street-facing sides of corner and double-frontage lots count as frontage.12 Ask the city setback contact to apply those conditions to the parcel; we could not confirm a numeric R-1 minimum lot area.10

How do septic permits work inside Creston?

For a Creston parcel, resolve public sewer availability before commissioning a private septic design: the applicable sewage rules bar installation, repair or rehabilitation of a private system where public treatment is available or a local ordinance requires connection.4 Union County Environmental Health administers private sewage disposal regulations and requires a septic permit before construction or reconstruction.313 The county application lists a $250 construction permit, including 2 inspections, with additional inspections costing $50 each.14 Union County’s soils have a 0% share rated not limited for conventional drain fields; that calls for a site evaluation, not a conclusion that septic is impossible.15 Ask the city and Environmental Health whether a private system is permissible at the address before relying on that option.4

Can you live in an RV or tiny home on land in Creston?

Creston prohibits parking or occupying a recreational vehicle on private land except as otherwise provided by state law and city regulations.5 An operable RV in good repair may be stored temporarily at its owner’s residence while it is not used for residential occupancy.5 That storage allowance does not authorize living in the RV while building a home.5 We could not confirm a separate tiny-home occupancy rule; ask the city zoning contact how the proposed dwelling would be classified.10 Manufactured dwellings outside approved parks face permanent-foundation, utility and real-estate conversion requirements, including a minimum 20-foot horizontal dimension for at least 65% of the longer dimension.6

Building a home in Creston: what steps should you take in order?

  1. Ask Creston’s Building and Code Compliance Department to identify the zoning district and apply the setbacks to your proposed site plan.102
  2. Resolve sewer service with the city; consult Union County Environmental Health if a private septic system is proposed.1043
  3. Use the city’s building-permit application and ask which trade applications accompany the project.9
  4. Confirm the building inspection schedule with Creston’s listed building inspections contact before construction.11
  5. For a manufactured dwelling, resolve the assessor’s conversion certification and entry on the tax rolls before seeking a temporary or permanent certificate of occupancy.16

What stays with Union County, and what should you check before buying in Creston?

Union County Environmental Health remains the contact for private sewage disposal regulation and qualifying private well construction permits.37 A septic self-installation allowance is conditional: the owner must document at least 6 credit hours of wastewater education taken within the preceding 12 months and follow state and county requirements.17 That allowance concerns septic installation and does not establish an exemption for building a house.17 Ask Creston’s city zoning office about floodplain-overlay conditions, driveway access and the proposed use before purchase; we could not confirm those complete city requirements.10 For a parcel outside Creston city limits, use the Union County guide for the county’s separate jurisdiction.18

Watch-outs

  • Creston’s RV storage exception applies only when the RV is not used for residential occupancy.5
  • A Creston manufactured dwelling cannot receive a temporary or permanent certificate of occupancy until the assessor certifies conversion and entry on the tax rolls.16
  • A private septic system cannot be assumed available where public sewer service or a local connection requirement applies.4

Sources

  1. crestoniowa.gov (Creston), quoted and re-checked
  2. Chapter 166 Zoning Code — Zoning Districts (Creston), quoted and re-checked
  3. Union County Environmental Health, quoted and re-checked
  4. Iowa Administrative Code Chapter 567.69 — Private Sewage Disposal Systems, quoted and re-checked
  5. 168.10 Manufactured Dwellings (Creston), quoted and re-checked
  6. 168.10 Manufactured Dwellings (Creston), quoted and re-checked
  7. Private Well Construction Permits, quoted and re-checked
  8. codelibrary.amlegal.com (Creston), quoted and re-checked
  9. Code Compliance & Building (Creston), quoted and re-checked
  10. Creston Building and Code Compliance Department (crestoniowa.gov)
  11. Creston Building Inspections — Veenstra & Kimm (crestoniowa.gov)
  12. 166.05 R-1 Single-Family Residential District (Creston), quoted and re-checked
  13. Ordinance 32: Private Sewage Disposal Systems, quoted and re-checked
  14. Application for Installation of Onsite Septic System, quoted and re-checked
  15. 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
  16. 168.10 Manufactured Dwellings (Creston), quoted and re-checked
  17. Application for Installation of Onsite Septic System, quoted and re-checked
  18. Union County Board of Supervisors Regular Session, July 20, 2020, quoted and re-checked

Written October 12, 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 Creston

Creston’s own rules

  • Building permitRequired

    Applicable construction and zoning-related building permits inside Creston city limits.

    • The Administrative Official is accountable for issuance of applicable permits.
    • Building permits must comply with the City Zoning Code.
    “Any time you build a new building, enlarge an existing building, or make a change to an existing building that affects its structural characteristics. Major residential remodeling projects and anytime a commercial or industrial building is remodeled.”
  • Building code adoptedAdopted

    Building-code administration and enforcement inside Creston city limits.

    • The Administrative Official or designee is responsible for enforcement.
    • The adopted procedures include applicable permits and permits issued in compliance with the City's Zoning Code.
    “Administration of this chapter shall be as provided in this chapter and in the following sections of the codes named in this chapter and hereby adopted by reference to provide procedures for local enforcement of the codes, constituting the Building Code.”
  • Certificate of occupancyLimited

    Manufactured dwellings proposed inside Creston city limits.

    • No permanent or temporary certificate of occupancy may be granted until the assessor certifies that conversion is satisfactorily completed and the property is entered on the tax rolls.
    • A bond or other surety may be required.
    “No certificate of occupancy, either permanent or temporary, shall be granted until the assessor has certified that the conversion has been satisfactorily completed and the property entered upon the tax rolls. A bond or other surety may be required to ensure that the conversion is satisfactorily completed.”
  • Local zoningPresent

    Land inside Creston city limits; the City administers a municipal Zoning Code.

    “For the purpose of the Zoning Code, the City is divided into the following Districts:”
  • Living in an RVProhibited

    Occupying or parking a factory-built dwelling unit or recreational vehicle on private land, public places, streets, alleys, or highways inside Creston city limits.

    • The prohibition is subject to exceptions provided by State law and City regulations.
    • A recreational vehicle not being used for residential occupancy may be stored temporarily by its owner at the owner's residence if operable and in good repair.
    “It is unlawful for any person to park or occupy any factory-built dwelling unit or recreational vehicle on the streets, alleys, highways, any public place or on private land except as otherwise provided by State law and City regulations. Recreational vehicles, while not being used for residential occupancy may be stored temporarily by the owner at his or her place of residence if such vehicle is operable and in good repair.”
  • Manufactured homesLimited

    Manufactured dwellings inside Creston city limits, including locations outside approved manufactured-dwelling parks.

    • Outside an approved manufactured dwelling park, the dwelling must comply with the listed requirements.
    • It must comply with minimum floor-area and width requirements of the one- and two-family dwelling district.
    • HUD certification, compatible permanent foundation, removal or permanent modification of the vehicular frame, real-estate tax conversion, City Code utility compliance, and other specified requirements apply.
    • A nonpark single-family manufactured dwelling must have a minimum horizontal dimension of 20 feet for at least 65 percent of the longer horizontal dimension, excluding attached garages, porches, and accessory structures.

    minimum horizontal dimension: >= 20 feet (For at least 65 percent of the longer horizontal dimension; exclusion applies to attached garages, porches, and accessory structures.) · required proportion of longer horizontal dimension: >= 65 percent (Unless located in an approved mobile home park.)

    “Nothing in this section shall be construed to allow a manufactured dwelling or mobile home to be located in other than an approved manufactured dwelling park, except if the dwelling is in compliance with the following provisions:”
  • Permit processPartial

    Building-permit process inside Creston city limits.

    • The city page provides permit-application links and identifies Public Works, Building Inspections, and the Code Compliance Officer as contacts.
    • The opened page did not state the complete review, issuance, inspection, or appeal sequence.
    “Application for Building Permit Trade Permit Demolition Permit Form Parking Permit Application Sewer Permit Form Vacant Building Permit/Registration Application”

Rules another office applies inside Creston

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

  • SetbacksSpecified

    R-1 Single-Family Residential District inside Creston city limits.

    • All sides of corner and double-frontage lots adjacent to streets are treated as frontage.
    • Open, unenclosed porches or decks may extend 10 feet into the front yard if the stated roof-solidness condition is met.
    • An addition to an existing structure may be allowed without extending farther into the front yard if all other side-yard and rear-yard setbacks are met.
    • For lots 50 feet or less in width existing when the Zoning Ordinance was adopted, side yards may be reduced to 10 percent of lot width but not below 4 feet.
    • The rear-yard accessory-building limitation and 2-foot rear-boundary rule apply.

    front yard on residential street: >= 25 feet minimum · front yard on collector street or higher classification: >= 40 feet minimum · side yard: >= 7 feet minimum on each side (For qualifying lots 50 feet or less wide, 10 percent of lot width, never less than 4 feet.) · rear yard: 30 feet or 20% of lot depth, whichever is greater

    “There shall be a front yard having a depth of not less than twenty-five (25) feet on residential streets and forty (40) feet on collector streets or higher classifications.”
  • Building heightSpecified

    R-1 Single-Family Residential District inside Creston city limits.

    maximum building height: <= 35 feet or 2.5 stories

    “No building shall exceed two and one-half (2½) stories or thirty-five (35) feet in height.”

Still unanswered

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

  • Owner-builder exemption — Owner-performed residential construction inside Creston city limits.
  • Inspections — Building inspections for construction inside Creston city limits.
  • Minimum dwelling size — R-1 Single-Family Residential District inside Creston city limits.
  • Minimum lot size — R-1 Single-Family Residential District inside Creston city limits.
  • Lot coverage — R-1 Single-Family Residential District inside Creston city limits.
13 more unanswered
  • Camping on your land
  • Tiny homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • 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 Creston publishes no rule on the point, not that none exists. Union County’s page lists the county offices to call.

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