Idaho Falls, ID Development Impact Fees (2026)

What a single-family home pays in Idaho Falls

$9,359 total per unit across 6 fee categories.

At $9,359, Idaho Falls is below the Idaho tracked median of $19,153 — relatively affordable to build in.

Full fee schedule — single-family

Coverage & caveats

Idaho Falls (Bonneville County) levies development IMPACT FEES in exactly FOUR categories, all collected by the City itself: Parks & Recreation, Transportation, Police, and Fire/EMS (2026 TischlerBise CIP & Development Impact Fee Study; adopted by resolution after the April 23, 2026 public hearing; EFFECTIVE JUNE 1, 2026). Effective June 1, 2026 the City switched residential impact fees from per-housing-type (single-family/multifamily) to a THREE-TIER square-footage structure based on climate-controlled floor area (unfinished basements included; garages/attics/crawlspaces excluded). The City adopted the MAXIMUM SUPPORTABLE amounts. PRIMARY single-family figures use the middle 1,500-2,999 sq ft tier (representative ~2,000-2,500 sf home): Parks $1,276 + Transportation $2,890 + Police $298 + Fire/EMS $438 = $4,902 total per dwelling. The Under-1,500 tier ($3,109) and 3,000+ tier ($6,460) are included as excludeFromTotal rows. Under the new square-footage structure there is no longer a distinct multifamily impact-fee schedule - multifamily and ADUs are assessed by the same square-footage tiers. WATER/SEWER CONNECTION fees: City Water Service Connection = $3,172 for the standard 1\" residential service (eff. Oct 1, 2025, up from $3,080); City Wastewater (sewer) Service Connection = $1,285 for 1\" (unchanged from Jan 2025; a separate lower 'Ammon/Ucon/ISBD' table at $582 for 1\" does NOT apply inside Idaho Falls). 1\" is the smallest size in both schedules (no 3/4\"/5/8\" tier). Per-front-foot main connection charges: Sewer Main Connection $29.77/ft and Water Main Connection $50.80/ft (eff. Oct 1, 2025) - additive but frontage-dependent, flagged excludeFromTotal. WHAT DOES NOT EXIST: NO school impact fee (not authorized under the Idaho Development Impact Fee Act); NO drainage/stormwater impact fee; NO library impact fee; NO general/capital, open space, affordable housing, or mitigation impact fees; NO separate highway-district impact fee (no ACHD-style district as in Boise/Ada County). VERIFY: confirmed 16 of 16 rows; dropped 0. The 12 impact-fee rows were originally cited to sourceIndex 0 (the adopted Resolution Exhibit A), which downloaded as a 4-page image-only scanned PDF with ZERO machine-extractable text - the OCR sourceQuotes ('10.1.b 1,500 to 2,999...') could NOT be confirmed in that document. However, all 12 amounts were confirmed EXACTLY (verbatim, dollar-for-dollar) in Figure 6 of the machine-readable 2026 TischlerBise study (sourceIndex 1, lines reading 'Under 1,500 $790 $1,864 $185 $270 $3,109'; '1,500 to 2,999 $1,276 $2,890 $298 $438 $4,902'; '3,000 or More $1,700 $3,780 $397 $583 $6,460'), so each of these 12 rows was RE-POINTED from sourceIndex 0 to sourceIndex 1 with the verbatim Figure 6 quote and confidence retained at high. Effective date June 1, 2026 and the four-category structure independently confirmed by the city Impact Fees webpage (sourceIndex 2) and East Idaho News (sourceIndex 6). Water Service Connection 1\" $3,172, Sewer Main $29.77/ft, and Water Main $50.80/ft confirmed verbatim in the FY2025-2026 master fee workbook (sourceIndex 4, items 10.1.a / 10.3 / 10.3 respectively). Wastewater Service Connection 1\" $1,285 confirmed verbatim in the 2024-2025 Fee Schedule (sourceIndex 3, item 10.1.a); the separate $582 Ammon/Ucon/ISBD table (item 10.12) was also located, confirming the researcher's note that $1,285 is the in-city figure. excludeFromTotal corrections: NONE needed - all flags were already correct (Under-1,500 and 3,000+ size tiers are mutually exclusive with the primary 1,500-2,999 tier and correctly excluded; both per-front-foot main charges correctly excluded as frontage-dependent; primary-tier per-dwelling impact total = $4,902 with no double counting; 1\" water/sewer connection fees correctly retained as the standard residential variant).

Representative single-family (1,500-2,999 sq ft) total impact fees = $4,902/unit effective June 1, 2026 (Parks $1,276 + Transportation $2,890 + Police $298 + Fire/EMS $438) - matches the Maximum Supportable Fee column of TischlerBise study Figure 6. Plus utility connection fees for a standard 1\" residential service: Water Service Connection $3,172 + Wastewater Service Connection $1,285 = $4,457 in per-connection utility fees. Combined typical per-unit impact + connection fees ~= $9,359, before lot-frontage-dependent main connection charges (Water $50.80/ft + Sewer $29.77/ft). All figures independently verified against official City of Idaho Falls adopted fee schedules/workbook and the machine-readable 2026 TischlerBise impact fee study (Figure 6, exact match).

Sources

7 official sources · 16 high-confidence figures.

Idaho Falls impact fees — FAQ

How much are development impact fees in Idaho Falls, ID for a single-family home?

As of 2026-06-17, total development fees for a single-family detached home in Idaho Falls are about $9,359 per unit — roughly $4,902 in impact/development fees plus $4,457 in water/sewer connection fees. Figures are normalized from official sources; verify with the jurisdiction before relying on them.

Are impact fees in Idaho Falls the same as building permit fees?

No. Impact fees (and water/sewer connection fees) fund off-site capital — roads, parks, schools, utilities — and are charged per new dwelling unit. Building permit and plan-review fees are separate and are not included here.

How often do Idaho Falls's impact fees change?

Most jurisdictions adopt fees by ordinance and escalate them annually (often by a construction cost index), with occasional mid-year updates. Always confirm the current adopted schedule with the jurisdiction. ImpactFeeAtlas last verified Idaho Falls on 2026-06-17.