Bolthole Index

Floyd County, Iowa

Zoning, building permits and septic rules in Colwell, Iowa

Colwell is a city in Floyd County, Iowa. Septic permits inside Colwell come from the county and state together. 3 rules below are quoted from official sources and independently re-checked, most recently on November 1, 2026. Rules for unincorporated land are on the Floyd County page.

Answers from the rulebook for Colwell

Rules another office applies inside Colwell

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

  • Who permits septicMixed (with conditions)

    Private sewage disposal systems installed or altered on land inside Colwell city, Floyd County, Iowa. The state rule applies statewide; the Iowa rule defines the local administrator as the county board of health.

    • The rule defines the administrative authority as the department or the local county board of health, so the state rule is administered locally.
    • Which Floyd County office acts as the local county board of health for Colwell was not confirmed on an official page.
    • Whether Colwell city has a public sewer that a home must use instead of a private system was not confirmed.
    ““administrative authority” means the department or the local county board of health as authorized by iowa code section 455b.172 and chapter 137.”
  • Septic permitRequired

    Installing or altering a private sewage disposal system (psds) on land inside Colwell city, Floyd County, Iowa

    • Construction may proceed after the construction permit is issued.
    • The rule says these rules are applicable only to private sewage disposal systems (psdss).
    “no psds shall be installed or altered as described in 69.1(3) “b” unless a construction permit issued by the administrative authority is obtained prior to construction.”
  • Septic inspectionRequired

    Newly constructed private sewage disposal systems in Colwell city, Floyd County, Iowa

    • Inspection must occur before the system is backfilled.
    • A final as-built drawing is made as part of the final inspection and kept with the construction permit (567—69.1(6)(c)).
    “the administrative authority shall conduct an at-location inspection of all newly constructed psdss before the system is backfilled.”

Still unanswered

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

  • Building permit — Building permit for new homes inside Colwell city
  • Owner-builder exemption — Owner-builder exemption for building permits inside Colwell city
  • Building code adopted — Building code adopted for new construction inside Colwell city
  • Inspections — General building inspections for new homes inside Colwell city (septic inspection is a separate claim)
  • Certificate of occupancy — Certificate of occupancy for new homes inside Colwell city
22 more unanswered
  • Local zoning
  • Zoning districts
  • Minimum dwelling size
  • Minimum lot size
  • Setbacks
  • Lot coverage
  • Building height
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Building in a floodplain
  • 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 Colwell publishes no rule on the point, not that none exists. Floyd County’s page lists the county offices to call.

← All of Floyd County: county rules, score and offices