Nampa, ID Development Impact Fees (2026)
Normalized development impact fees, water & sewer connection (tap/SDC) fees, and mitigation fees for Nampa, Idaho — per dwelling unit, by category, with links to every official source.
What a single-family home pays in Nampa
$13,760 total per unit across 6 fee categories.
- Transportation / roads$4,933
- Parks & recreation$3,133
- Water connection (tap / SDC)$1,851
- Sewer connection (tap / SDC)$1,815
- Fire / EMS$1,267
- Police$761
At $13,760, Nampa is below the Idaho tracked median of $19,123 — relatively affordable to build in.
Full fee schedule — single-family
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. Single Family/Townhouse rate also applies to mobile/manufactured homes per the bulletin's Impact Fee Category table. | 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. | 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. Fire fee decreased from $1,658 in 2024. | 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 by the City at building permit. Nampa is in Canyon County; the Nampa Highway District No.1 is funded by property taxes and does NOT levy a transportation impact fee. The Canyon County / Highway District No.4 transportation impact fee applies only to the Mid-Star service area (Star/Middleton), NOT within Nampa city limits. 2026 SF impact-fee TOTAL (Parks+Police+Fire+Streets) = $10,094. | 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Transportation / roads Streets Impact Fee (2024 schedule - superseded) — SUPERSEDED prior schedule, kept for reference. 2024 SF total was $8,194 (Parks $2,476 / Police $639 / Fire $1,658 / Streets $3,421); applies only to permit applications submitted before Jan 1, 2026. Current 2026 schedule supersedes. 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 (shown as '2024 Fee (current)' - still in effect). Multifamily is $1,815 per equivalent dwelling unit (EDU). | 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 fee. This is the capacity/hookup component only; standard physical meter-set and tap installation costs are billed separately. Multifamily/non-residential water = domestic $216 per EDU + fire flow $54 per Equivalent Fire Unit (EFU). Nampa's relatively low water connection fee reflects that outdoor/landscape demand is served by a separate pressurized irrigation system (see irrigation row). | 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 the domestic water fee, not exclusive - Nampa requires new residential to connect to its pressurized (non-potable) irrigation system, billed by service size. 1in service is the typical single-family residential connection. Larger sizes (1.5in=$3,165, 2in=$5,062, 3in=$10,124) are additional excluded rows below. | 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. 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. 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. Excluded from total. alternative · not added to total | per meter | $10,124 | City of Nampa Building Safety Department Jan 1, 2026High |
Full fee schedule — multifamily
Impact / development fees
| Fee (local term) | Basis | Amount | Source · effective |
|---|---|---|---|
Parks & recreation Parks Impact Fee (Multifamily) — Multifamily (duplex and greater) per-unit rate, 2026 schedule. Includes apartments, assisted living, board-and-care, duplex, triplex, four-plex+ per the bulletin category table. | per dwelling unit | $2,450 | City of Nampa Building Safety Department Jan 1, 2026High |
Police Police Impact Fee (Multifamily) — Multifamily per-unit rate, 2026 schedule. | per dwelling unit | $595 | City of Nampa Building Safety Department Jan 1, 2026High |
Fire / EMS Fire Impact Fee (Multifamily) — Multifamily per-unit rate, 2026 schedule. | per dwelling unit | $886 | City of Nampa Building Safety Department Jan 1, 2026High |
Transportation / roads Streets (Transportation) Impact Fee (Multifamily) — Multifamily per-unit Streets impact fee, 2026 schedule. 2026 multifamily impact-fee TOTAL (Parks+Police+Fire+Streets) = $6,627 per unit. | per dwelling unit | $2,696 | City of Nampa Building Safety Department Jan 1, 2026High |
Water & sewer connection fees
| Fee (local term) | Basis | Amount | Source · effective |
|---|---|---|---|
Sewer connection (tap / SDC) Wastewater (Sewer) Connection Fee (Multifamily, per EDU) — Multifamily wastewater connection fee charged per equivalent dwelling unit (EDU). | per dwelling unit | $1,815 | City of Nampa Building Safety Department Jan 1, 2026High |
Water connection (tap / SDC) Domestic Water Connection Fee (Multifamily, per EDU) — Multifamily domestic water connection fee per EDU. A separate additive fire flow fee of $54 per Equivalent Fire Unit (EFU) also applies. | per dwelling unit | $216 | City of Nampa Building Safety Department Jan 1, 2026High |
Coverage & caveats
FOUND (City of Nampa, all from official Dec 2025 bulletin, high confidence): Parks, Police, Fire, and Streets (transportation) development impact fees per dwelling unit for both single-family/townhouse and multifamily; wastewater (sewer) connection/hookup fees; domestic water connection fees; and pressurized irrigation hookup fees. 2026 single-family impact-fee total = $10,094 ($3,133 parks + $761 police + $1,267 fire + $4,933 streets). 2026 multifamily total = $6,627 per unit. DOES NOT EXIST / NOT APPLICABLE here: (1) NO SCHOOL IMPACT FEE - Idaho Code 67-8203 limits impact fees to police, fire, streets, and parks; schools are not an eligible public facility statewide (legislative attempts to add schools have repeatedly failed), so neither the City nor the Nampa School District charges a school impact fee. (2) NO separate highway-district transportation impact fee within Nampa - unlike Ada County (ACHD), Nampa is in Canyon County; the Nampa Highway District No.1 is funded by property taxes and levies no impact fee. The Canyon County / Highway District No.4 transportation impact fee applies only to the Mid-Star (Star/Middleton) service area, NOT inside Nampa city limits. The City's own "Streets" impact fee is the transportation fee. (3) NO standalone drainage, library, open-space, affordable-housing, or general/capital impact fee categories - Idaho law does not authorize these as impact fees, and Nampa publishes none. (4) Stormwater/drainage is handled through site design and permit review, not a published per-unit impact fee. ADU / MOBILE HOME: Nampa's bulletin treats single-family, townhouse, and mobile/manufactured homes under one "Single Family/Townhouse/Mobile" category. No separate published per-unit ADU impact-fee tier exists; the bulletin's exemptions include additions to a residential structure that do not increase the number of service units, and replacing one residential unit with another on the same lot. ADUs that add a service unit would generally be assessed at applicable per-unit rates. CAVEATS: Connection/hookup amounts are the capacity/hookup components from the 2026 bulletin (labeled the current 2024 fees, still effective); the older underlying water-hookup resolution (No. 50-2021) is a scanned image PDF that could not be text-extracted, but the bulletin figures are more current and authoritative. Physical meter-set and tap-installation labor/material charges, building permit fees, plan review, and plant investment beyond the listed capacity fees are separate and not included. Mitigation fees: in April 2025 the City discussed a possible developer mitigation-fee concept (per a BoiseDev report), but no adopted mitigation fee schedule was found, so none is reported. Population is a 2025 estimate (~108,957; 2020 census was 100,200).
All figures are from the City of Nampa's official Bulletin GA-11-2025-35, the "2026 Development Impact Fee Schedule," dated December 4, 2025. Impact fees (Parks, Police, Fire, Streets) were revised by City Council effective Jan 1, 2026; applications submitted before that date use the 2024 schedule (included as an excluded reference row). The wastewater, water, and pressurized-irrigation connection/hookup fees are shown in the same bulletin as the current fees (labeled "2024 Fee (current)") and remain in effect. For a representative single-family home, the four CITY impact fees total $10,094, plus connection fees: wastewater $1,815 + domestic water $269 + pressurized irrigation (1in) $1,582. The impact fees are flat per dwelling unit (NOT tiered by home square footage), so no representative sq-ft tier selection was needed. Irrigation is priced by service size (1in = residential default); larger sizes are excluded variants. Multifamily fire fee is per-unit; the water fire-flow fee ($54/EFU) is an additive component on top of the $216/EDU domestic water fee.
Sources
5 official sources · 17 high-confidence figures.
- 1Bulletin GA-11-2025-35: 2026 Development Impact Fee Schedule (Impact Fees + Wastewater/Water/Irrigation Connection Fees)City of Nampa Building Safety Department · fee schedule · effective Jan 1, 2026 · retrieved Jun 16, 2026
- 2Development Impact Fees - City of Nampa Official WebsiteCity of Nampa · municipal webpage · retrieved Jun 16, 2026
- 3Rates and Resolutions (Water/Wastewater/Irrigation Hookup Fee Resolutions)City of Nampa · municipal webpage · retrieved Jun 16, 2026
- 4Idaho Code Section 67-8203 (Development Impact Fees - definitions / eligible public facilities)Idaho Legislature · ordinance · retrieved Jun 16, 2026
- 5Impact fees for schools introduced in Senate committee (confirms schools not currently eligible in ID)Idaho Reports / Idaho Public Television · news article · retrieved Jun 16, 2026
Nampa impact fees — FAQ
- How much are development impact fees in Nampa, ID for a single-family home?
- As of 2026-06-16, total development fees for a single-family detached home in Nampa are about $13,760 per unit — roughly $10,094 in impact/development fees plus $3,666 in water/sewer connection fees. Figures are normalized from official sources; verify with the jurisdiction before relying on them.
- What are the impact fees per multifamily unit in Nampa, ID?
- Total development fees for a multifamily unit in Nampa are about $8,658 per unit as of 2026-06-16.
- Are impact fees in Nampa 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 Nampa'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 Nampa on 2026-06-16.