Caldwell, ID vs Nampa, ID: Development Impact Fees Compared (2026)
A single-family home pays about $14,197 in Caldwell vs $13,760 in Nampa — Caldwell is $437 (3%) higher. Every figure below is normalized per dwelling unit by category, with links to each jurisdiction’s official sources.
City
Caldwell, ID
$14,197
Total per single-family home
impact + connection fees
$7,562
Impact / development fees
roads, parks, schools…
$6,635
Water & sewer connection
tap / capacity / SDC
$2,293
Per multifamily unit
total fees / unit
Impact / development fees
| Fee (local term) | Basis | Amount | Source · effective |
|---|---|---|---|
Parks & recreation Parks Impact Fee — Resolution 193-23, effective Oct 1, 2023; VERIFIED via OCR of scanned PDF page 1 ('2023 Proposed Impact Fees ... Parks ... Residential $2,081.73 /Unit', increased from 2022 Res 384-22 level of $2,006.94). Flat per-unit (not size-tiered). Confidence medium because a newer index-adjusted resolution may exist but was not located. A 2025 draft Police & Fire study does NOT cover Parks. | per dwelling unit | $2,082 | City of Caldwell, Idaho Oct 1, 2023Medium |
Fire / EMS Fire Impact Fee — Resolution 193-23, eff. Oct 1, 2023; VERIFIED via OCR (Residential $1,070.37/Unit; Non-Residential $0.53/ft2). Confidence medium re currency (newer index-adjusted resolution may exist, not located). | per dwelling unit | $1,070 | City of Caldwell, Idaho Oct 1, 2023Medium |
Police Police Impact Fee — Resolution 193-23, eff. Oct 1, 2023; VERIFIED via OCR (Residential $184.01/Unit; Non-Residential $0.09/ft2). Total residential impact fee confirmed at $3,336.11/Unit (2,081.73+1,070.37+184.01). Confidence medium re currency. | per dwelling unit | $184 | City of Caldwell, Idaho Oct 1, 2023Medium |
Transportation / roads Traffic/Transportation Impact Fee (Caldwell & Highway District No. 4) — Resolution 429-24 (Caldwell Area CIP & TIF Program), Table 7 on PDF page 33; VERIFIED via high-res OCR of the rendered table. Joint program of City of Caldwell and HIGHWAY DISTRICT NO. 4; City-collected fees spent only on CIP projects within City of Caldwell. ITE Land Use Code 210, per dwelling unit. New program adopted Jan 21, 2025. | per dwelling unit | $4,226 | City of Caldwell, Idaho & Highway District No. 4 (prepared by Kittelson & Associates) Jan 21, 2025High |
Water & sewer connection fees
| Fee (local term) | Basis | Amount | Source · effective |
|---|---|---|---|
Water connection (tap / SDC) Water Well Development Fee — Resolution 318-24, eff. Oct 1, 2024; VERIFIED via OCR of scanned PDF (quote confirmed verbatim). Additive water connection component (domestic-only). Irrigation connections carry additional fees not included here. | per dwelling unit | $899 | City of Caldwell, Idaho Oct 1, 2024High |
Water connection (tap / SDC) Water Trunk Line Fee — Resolution 318-24; VERIFIED via OCR (quote confirmed verbatim). Additive water connection component. | per dwelling unit | $735 | City of Caldwell, Idaho Oct 1, 2024High |
Water connection (tap / SDC) Water Connection (3/4" x 3/4" Meter & Service) — Resolution 318-24; VERIFIED via OCR. Base residential 3/4" meter & service selected as primary; larger meter sizes (1" $3,864.89; 1.5" $5,578.21; 2" $7,170.21) confirmed in source as mutually-exclusive alternatives and excluded. | per meter | $2,617 | City of Caldwell, Idaho Oct 1, 2024High |
Water connection (tap / SDC) Water Main Extension Fee (frontage-based, minimum) — Resolution 318-24; VERIFIED via OCR (quote confirmed verbatim). $39.75/front foot; 60 ft minimum = $2,385 minimum. Frontage/situation-dependent and often waived when developer installs mains or via a Local Improvement District; excludeFromTotal=true confirmed correct. unitBasis 'per_acre' used as closest schema proxy for the actual per-front-foot basis. alternative · not added to total | per acre | $2,385 | City of Caldwell, Idaho Oct 1, 2024High |
Sewer connection (tap / SDC) Sewer Interceptor Fee — Resolution 316-24, eff. Oct 1, 2024; VERIFIED via OCR (quote confirmed verbatim). Additive sewer connection component (oversized mains/interceptor/trunk lines). | per dwelling unit | $1,171 | City of Caldwell, Idaho Oct 1, 2024High |
Sewer connection (tap / SDC) Sewer Plant Capacity Fee — Resolution 316-24; VERIFIED via OCR. Source confirms Interceptor + Plant Capacity = $2,384.23 stated residential minimum ('two thousand three hundred eighty-four dollars and twenty-three cents ($2,384.23) per connection (the sum of the Residential Plant Capacity and Interceptor Fees)'). | per dwelling unit | $1,213 | City of Caldwell, Idaho Oct 1, 2024High |
Sewer connection (tap / SDC) Sewer Main Extension Fee (frontage-based, minimum) — Resolution 316-24; VERIFIED via OCR (quote confirmed verbatim). $42.38/front foot; 60 ft minimum = $2,542.80. Frontage/situation-dependent, often waived when developer installs mains (source: 'If the owner or developer is directed to construct the main line by the City, the mainline extension fee shall be waived'); excludeFromTotal=true confirmed correct. unitBasis 'per_acre' is a schema proxy for the per-front-foot basis. alternative · not added to total | per acre | $2,543 | City of Caldwell, Idaho Oct 1, 2024High |
Sewer connection (tap / SDC) Sewer Stub-out Fee (conditional) — Resolution 316-24; VERIFIED via OCR (quote confirmed verbatim). Applies ONLY when the City elects to construct the service stub; waived where the user constructs its own stub or via a Local Improvement District. excludeFromTotal=true confirmed correct (conditional). alternative · not added to total | per dwelling unit | $977 | City of Caldwell, Idaho Oct 1, 2024High |
City
Nampa, ID
$13,760
Total per single-family home
impact + connection fees
$10,094
Impact / development fees
roads, parks, schools…
$3,666
Water & sewer connection
tap / capacity / SDC
$8,658
Per multifamily unit
total fees / unit
Impact / development fees
| Fee (local term) | Basis | Amount | Source · effective |
|---|---|---|---|
Parks & recreation Parks Impact Fee — City of Nampa development impact fee, effective for building permit applications submitted on/after Jan 1, 2026. VERIFIED against PDF table: 2026 SF Parks = $3,133. | per dwelling unit | $3,133 | City of Nampa Building Safety Department Jan 1, 2026High |
Police Police Impact Fee — City of Nampa development impact fee, 2026 schedule. VERIFIED: 2026 SF Police = $761. | per dwelling unit | $761 | City of Nampa Building Safety Department Jan 1, 2026High |
Fire / EMS Fire Impact Fee — City of Nampa development impact fee, 2026 schedule. VERIFIED: 2026 SF Fire = $1,267 (down from $1,658 in 2024 per the same table). | per dwelling unit | $1,267 | City of Nampa Building Safety Department Jan 1, 2026High |
Transportation / roads Streets (Transportation) Impact Fee — City of Nampa 'Streets' development impact fee = the transportation impact fee, collected at building permit. VERIFIED: 2026 SF Streets = $4,933, Total $10,094. Nampa Highway District No.1 levies no separate transportation impact fee inside city limits. | per dwelling unit | $4,933 | City of Nampa Building Safety Department Jan 1, 2026High |
Transportation / roads Streets Impact Fee (2024 schedule - superseded) — SUPERSEDED prior schedule, kept for reference. VERIFIED: 2024 SF total $8,194 (Parks $2,476 / Police $639 / Fire $1,658 / Streets $3,421); applies only to permit applications submitted before Jan 1, 2026. Correctly excluded from total. alternative · not added to total | per dwelling unit | $3,421 | City of Nampa Building Safety Department Jul 1, 2024High |
Water & sewer connection fees
| Fee (local term) | Basis | Amount | Source · effective |
|---|---|---|---|
Sewer connection (tap / SDC) Wastewater (Sewer) Connection / Hookup Fee — Wastewater hookup/connection fee per the 2026 bulletin (labeled '2024 Fee (current)' - still in effect). VERIFIED verbatim. | per dwelling unit | $1,815 | City of Nampa Building Safety Department Jan 1, 2026High |
Water connection (tap / SDC) Domestic Water Connection / Hookup Fee — City domestic water connection/hookup capacity fee. VERIFIED verbatim. Physical meter-set/tap costs billed separately. Outdoor demand served by separate pressurized irrigation system. | per dwelling unit | $269 | City of Nampa Building Safety Department Jan 1, 2026High |
Water connection (tap / SDC) Pressurized Irrigation Hookup Fee (1in service) — ADDITIVE to domestic water fee; Nampa requires new residential to connect to its pressurized (non-potable) irrigation system, billed by service size. 1in is the typical single-family connection (representative). VERIFIED verbatim. | per meter | $1,582 | City of Nampa Building Safety Department Jan 1, 2026High |
Water connection (tap / SDC) Pressurized Irrigation Hookup Fee (1.5in service) — Larger irrigation service variant; mutually exclusive with the 1in residential primary. VERIFIED verbatim. Correctly excluded from total. alternative · not added to total | per meter | $3,165 | City of Nampa Building Safety Department Jan 1, 2026High |
Water connection (tap / SDC) Pressurized Irrigation Hookup Fee (2in service) — Larger irrigation service variant; mutually exclusive with the 1in residential primary. VERIFIED verbatim. Correctly excluded from total. alternative · not added to total | per meter | $5,062 | City of Nampa Building Safety Department Jan 1, 2026High |
Water connection (tap / SDC) Pressurized Irrigation Hookup Fee (3in service) — Larger irrigation service variant; mutually exclusive with the 1in residential primary. VERIFIED verbatim. Correctly excluded from total. alternative · not added to total | per meter | $10,124 | City of Nampa Building Safety Department Jan 1, 2026High |
What drives the difference
Caldwell’s $14,197 per single-family home is $437 (3%) above Nampa’s $13,760. The largest single difference is in water connection (tap / sdc): Caldwell charges about $4,251 there versus $1,851 in Nampa — a $2,400 swing that accounts for much of the overall gap. The two also differ in how much falls on water and sewer connection charges: $6,635 in Caldwell versus $3,666 in Nampa.
Keep comparing
Caldwell vs Nampa impact fees — FAQ
- Which has higher impact fees, Caldwell or Nampa?
- Caldwell, ID is higher. A single-family home pays about $14,197 per unit in Caldwell versus $13,760 in Nampa, ID — $437 (3%) more, as of 2026.
- How much more does it cost to build a home in Caldwell than in Nampa?
- About $437 more per single-family home — $14,197 in Caldwell, ID versus $13,760 in Nampa, ID, a difference of 3% in total development impact and connection fees.
- What's the difference between impact fees in Caldwell and Nampa for a single-family home?
- Caldwell, ID charges about $14,197 per single-family home ($7,562 impact + $6,635 water/sewer connection), while Nampa, ID charges about $13,760 ($10,094 impact + $3,666 connection). Figures are normalized from official sources for 2026.