Zoning, building permits and septic rules in Cresco, Iowa

Cresco’s own rules

• Building permitRequired

  Building or other structure erected or altered inside Cresco city limits.

  • Includes remodeling if the size of the structure is changed in any way, including adding a porch or deck.
  • Construction may proceed after the permit is issued (section 155.05 approval).

  “155.01 permit required. no building or other structure shall be erected or altered within the city without first receiving a building permit. this includes remodeling a building if the size of the structure is changed in any way, including the addition of a porch or deck.”

• Building code adoptedPartial

  Specific construction types in Cresco city (manufactured homes, solar energy systems).

  • The city code points to the state building code for these items; a general city adoption statement was not located.
  • Solar energy systems must be consistent with the state of Iowa building code (Chapter 161).

  “any such home shall be installed in accordance with the requirements of the state building code.”

• Local zoningPresent (with conditions)

  Land inside Cresco city limits: Cresco city adopts and administers its own zoning regulations (Code Chapter 165).

  • Zoning districts and use rules are set by Cresco city Chapter 165; county or township zoning does not replace them inside city limits.
  • Code version reviewed is the city's Ver 2024 July PDF; current supplements not checked.

  “165.18 r-1 single-family residential district. the regulations set forth in this section apply in the r-1 single-family residential district.”

• Zoning districtsPublished (with conditions)

  Zoning districts within Cresco city limits.

  • Districts listed in Chapter 165 include A agricultural, R-1, R-2, R-3, R-4 mobile home park, C-1, C-2, M-1 light industrial, and H medical.
  • Maps and boundary descriptions (section 165.03) were not opened.

  “165.17 a agricultural district 165.18 r-1 single-family residential district 165.19 r-2 light density residential district”

• Minimum lot sizeSpecified

  Single-family dwelling lots in the R-1 single-family residential district of Cresco city (section 165.18).

  • Minimum lot width 75 feet for a dwelling.
  • Non-dwelling uses in this district carry a 1 acre minimum lot area and 150 feet width per the same schedule.

  minimum lot area, principal-use dwelling: >= 9000 square feet · minimum lot width, principal-use dwelling: >= 75 feet

  “5. lot area, frontage and yard requirements. requirements shall be observed: principal use dwellings non-dwellings the following minimum lot area lot width front yard depth side yard rear yard depth 9,000 square feet 75 feet 25 feet 7 feet 30 feet 1 acre 150 feet 50 feet 25 feet 50 feet”

• SetbacksSpecified

  Single-family dwellings in the R-1 single-family residential district of Cresco city (section 165.18).

  • Front yard may be averaged with developed frontage within 200 feet on either side where 30 percent or more is developed (section 165.11).
  • Corner lot and fence rules in sections 165.10 and 165.12 were not applied.

  front yard depth, dwelling: >= 25 feet (averaging per section 165.11) · side yard, dwelling: >= 7 feet · rear yard depth, dwelling: >= 30 feet

  “5. lot area, frontage and yard requirements. requirements shall be observed: principal use dwellings non-dwellings the following minimum lot area lot width front yard depth side yard rear yard depth 9,000 square feet 75 feet 25 feet 7 feet 30 feet 1 acre 150 feet 50 feet 25 feet 50 feet”

• Building heightSpecified

  Principal buildings in the R-1 single-family residential district of Cresco city (section 165.18).

  • Accessory building height rules in section 165.09 were not read.

  maximum height, principal building: <= 35 feet

  “3. maximum height regulation. no principal building shall exceed 35 feet in height.”

• Manufactured homesLimited

  Manufactured or mobile homes located outside a manufactured home community or mobile home park inside Cresco city.

  • Must sit on a permanent frost-free foundation meeting manufacturer or state building code support and anchorage requirements.
  • Must be visually compatible with permanent foundations of surrounding residential structures.
  • Homes inside a community or park that existed before January 1, 1995 are exempt from the foundation rule until relocated.

  “146.03 foundation requirements. a mobile home or manufactured home located outside of a manufactured home community or mobile home park shall be placed on a permanent frost-free foundation system that meets the support and anchorage requirements as recommended by the manufacturer or required by the state building code.”

• Off-grid sanitationLimited

  Private sewage disposal systems inside Cresco city limits.

  • Allowed only where a public sanitary sewer is not available; a building must connect when the sewer becomes available (section 98.07).
  • Discharge to ditches, streams or ground surface is prohibited (section 98.05).

  “98.05 discharge restrictions. it is unlawful to discharge any wastewater from an on-site wastewater treatment and disposal system (except under an npdes permit) to any ditch, stream, pond, lake, natural or artificial waterway, drain tile or to the surface of the ground.”

• Permit processPartial

  Building permit application in Cresco city.

  • Application is filed in writing with the public works director and must contain the listed information (name, address, legal description and related items).
  • Sections 155.04 through 155.10 (approval, appeal, conditions, revocation) were not opened.

  “155.02 application. application shall be made in writing, filed with the public works director and contain the following information:”

Rules another office applies inside Cresco

Cresco 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 septicCounty (with conditions)

  On-site wastewater systems inside Cresco city limits where no public sanitary sewer is available: the Howard County board of health issues the permit.

  • Applies only where a public sanitary sewer is not available under section 95.05.
  • Type, capacity, location and layout follow state rules (IAC 567 ch. 69) and additional county board of health regulations.

  “98.04 permit required. no person shall install or alter an on-site wastewater treatment and disposal system without first obtaining a permit from the county board of health.”

• Septic permitRequired

  Installing or altering an on-site wastewater system inside Cresco city where public sewer is not available; permit issued by the Howard County board of health.

  • Applies only where a public sanitary sewer is not available (section 98.02).
  • Permit is issued by the county board of health, not the city.

  “98.04 permit required. no person shall install or alter an on-site wastewater treatment and disposal system without first obtaining a permit from the county board of health.”

Still unanswered

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

• Owner-builder exemption — Owner-builder construction in Cresco city.
• Inspections — Building inspections inside Cresco city limits.
• Certificate of occupancy — Certificate of occupancy inside Cresco city limits.
• Minimum dwelling size — Minimum dwelling floor area inside Cresco city limits.
• Lot coverage — Lot coverage limits inside Cresco city limits.

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.