Bolthole Index

Story County, Iowa

Zoning, building permits and septic rules in Ames, Iowa

Ames is a city in Story County, Iowa. Ames adopts its own zoning, so inside its limits Ames’s rules apply, not the county’s. 4 rules below are quoted from official sources and independently re-checked, most recently on October 23, 2026. Rules for unincorporated land are on the Story County page.

Answers from the rulebook for Ames

Ames’s own rules

  • Building code adoptedPartial

    Building construction inside Ames city limits under the city's Chapter 5 Building, Electrical, Mechanical and Plumbing Code.

    • The text confirms the 2015 International Building Code as amended by the city.
    • Adoption of the residential code for one- and two-family dwellings (sec. 5.201) was not confirmed because its body text was not captured.
    • Other codes in chapter 5 (electrical, mechanical, plumbing) were not verified.
    “the provisions of the 2015 international building code (ibc), are amended with the revision of the following text as stated”
  • Local zoningPresent (with conditions)

    Land inside Ames city limits; the city's own Chapter 29 Zoning ordinance applies to lots and uses in the city.

    • Lots created after the effective date of the ordinance must meet the minimum lot area in the applicable zone development standards table.
    • Nonconforming lots are governed by section 29.307(4), as the code states.
    “(a) minimum lot area. all lots created after the effective date of this ordinance must meet the minimum lot area requirements listed in the applicable zone development standards table.”
  • Zoning districtsPublished (with conditions)

    Zoning districts inside Ames city limits, including the single-family district RL

    • Development standards are set out in tables for each base zone or special purpose district, per the code text.
    • District map location was not checked.
    “development standards table for each base zone or special purpose district”
  • Minimum lot sizeDistrict specific (with conditions)

    Lots created inside Ames city limits after the effective date of the Chapter 29 zoning ordinance, under the minimum lot area in each zone development standards table (residential zones including the single-family district, RL)

    • Flag lots in residential zones must each have an area equal to 10,000 square feet or 150% of the zone lot area, whichever is greater (sec. 29.401(1)(c)(iii)).
    • Nonconforming lots are governed by section 29.307(4).
    “(a) minimum lot area. all lots created after the effective date of this ordinance must meet the minimum lot area requirements listed in the applicable zone development standards table.”

Still unanswered

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

  • Building permit — Whether a building permit is required for a new home inside Ames city limits
  • Owner-builder exemption — Owner-builder permit exemption inside Ames city limits
  • Inspections — Building inspections for new homes inside Ames city limits
  • Certificate of occupancy — Certificate of occupancy for new homes inside Ames city limits
  • Minimum dwelling size — Minimum dwelling size for a home inside Ames city limits
17 more unanswered
  • Lot coverage
  • Building height
  • 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
  • Mandatory utility hookup
  • Agricultural exemption
  • Driveway access
  • Building in a floodplain
  • 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 Ames publishes no rule on the point, not that none exists. Story County’s page lists the county offices to call.

Off-grid gear

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

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