Zoning, building permits and septic rules in Island Park, Idaho

Island Park’s own rules

• Zoning districtsPublished (with conditions)

  Land inside Island Park city limits: R1 and R2 residential zones, and commercial zones named in the code.

  • The table in the 2025 PDF names the R1 zone, R2 zone and a commercial zone; the official city page also lists Aspen Ridge, Elk Creek, Macks Inn, Ponds Lodge, Sherwood Museum, Valley View, IP Village and Last Chance commercial zoning.
  • Zone maps were not opened.

  “development standard r1 zone* r2 commercial zone**”

• Minimum lot sizeSpecified

  R1 (single-family residential) zone inside Island Park city limits: minimum lot size 0.5 acres (the first column of Table 3-1, which is read as R1).

  • Table 3-1 is in the 2025 'with proposed changes' PDF; confirm against the adopted text.
  • Section 3-5(b) contains additional residential zone requirements not yet opened.
  • Section 1-7: lots of record created before July 1, 1993 that do not meet the minimum lot size may still have single-family structures built, expanded or occupied (per the same PDF).

  minimum lot size: 0.5 acres (R1 zone; lots of record created before 1993 per section 1-7)

  “minimum lot size.5 acres.5 acres n/a 2 8”

• Lot coverageSpecified

  R1 (single-family residential) zone inside Island Park city limits: maximum lot coverage 50%.

  • Table 3-1 is from the 2025 'with proposed changes' PDF; confirm against the adopted text.
  • The R2 and commercial columns carry 80% and are not applied here.

  maximum lot coverage: <= 50 percent (R1 zone)

  “maximum lot coverage 50% 80% 80% maximum building height in ft. 35 35 35”

• Building heightSpecified

  R1 (single-family residential) zone inside Island Park city limits: maximum building height 35 ft.

  • Table 3-1 is from the 2025 'with proposed changes' PDF; confirm against the adopted text.

  maximum building height: <= 35 ft (R1 zone)

  “maximum lot coverage 50% 80% 80% maximum building height in ft. 35 35 35”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Island Park or Fremont County directly.

• Building permit — Residential construction inside Island Park city limits
• Owner-builder exemption — Owner-builder construction inside Island Park city limits
• Building code adopted — Construction inside Island Park city limits
• Inspections — Residential construction inside Island Park city limits
• Certificate of occupancy — Occupancy of new dwellings inside Island Park 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.