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Plumbing Permit in Louisville, Colorado

Required for plumbing installation, alteration, or repair in Louisville, including sewer/water repair and new taps. Governed by the 2024 International Plumbing Code (IPC). Plumbing contractors must hold a Colorado DORA Plumbing Master License and State Contractor License, plus a City of Louisville Contractor License.

Verified 2026-07-05 · Source

When you need this permit

  • Governed by the 2024 IPC as adopted (effective 12/6/2025)
  • Contractors must hold a Colorado DORA Plumbing Master License and State Contractor License AND a City of Louisville Contractor License Contractor
  • Sewer/Water Repair (single trade) is classified as a Minor Permit; New Sewer/Water/Irrigation Tap is classified under 'Other Permits' for review-timeline purposes
  • Water and Sewer Tap Fees are separate line items — see Tap Fee Calculation Form; contact Public Works at (303) 335-4608

Required documents

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Fee schedule

Permit fee — valuation-based (Building Permit Fee Table)Table 4, CC 12/03/24
$28.00 minimum, scaling per valuation tiers
In-House Plan Review Fee
65% of the permit fee (only if plan review is required)
Sewer Tap Fee — Single Family ResidentialTable 3, effective 12/03/24, no annual inflator applied
$4,600 per unit
Boulder County Use Tax
1.185% of 50% of Total Valuation
City of Louisville Use Tax
3.775% of 50% of Total Valuation

Review timeline

Plan reviewLouisville’s published plan-review target
1–2 business days

How long did your Plumbing Permit permit actually take in Louisville?

Anonymous — one question, no email. Answers are combined and only shown once at least 5 people have reported.

Inspection process

  1. 1

    Rough Plumbing

    Requested via the CSS portal after pipes are installed, before concealment

  2. 2

    Final Inspection

    Fixtures connected, no leaks, proper venting verified

See the full Louisville inspection guide — scheduling & re-inspection fees →

Tips

  • Minor plumbing repairs move fast (1-2 business days), but a NEW water/sewer tap is classified differently (1-2 weeks) — don't assume all plumbing work gets the fastest timeline.
  • Water and sewer tap fees are billed separately from the base plumbing permit fee — confirm current tap fee amounts with Public Works (303-335-4608) before quoting a project.

Frequently asked questions

Louisville requires a plumbing permit for: Governed by the 2024 IPC as adopted (effective 12/6/2025); Contractors must hold a Colorado DORA Plumbing Master License and State Contractor License AND a City of Louisville Contractor License; Sewer/Water Repair (single trade) is classified as a Minor Permit; New Sewer/Water/Irrigation Tap is classified under 'Other Permits' for review-timeline purposes; Water and Sewer Tap Fees are separate line items — see Tap Fee Calculation Form; contact Public Works at (303) 335-4608. If your project isn't listed, confirm with City of Louisville Building Safety Division at (303) 335-4584 before starting work.

In Louisville, the published Permit fee — valuation-based (Building Permit Fee Table) is: $28.00 minimum, scaling per valuation tiers. Additional published fees: In-House Plan Review Fee — 65% of the permit fee (only if plan review is required); Sewer Tap Fee — Single Family Residential — $4,600 per unit; Boulder County Use Tax — 1.185% of 50% of Total Valuation; City of Louisville Use Tax — 3.775% of 50% of Total Valuation. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Louisville's published plan-review target for a plumbing permit is 1–2 business days.

You'll need: Plumbing Permit Application (CSS Online Portal). Depending on your project, Louisville may also ask for: Fixture Count form (Residential or Commercial). See the required-documents checklist on this page for details on each.

Louisville requires 2 inspection(s) for a plumbing permit, in order: Rough Plumbing, Final Inspection. Schedule each through City of Louisville Building Safety Division ((303) 335-4584).

Apply through City of Louisville Building Safety Division at City Hall, 749 Main St, Louisville, CO 80027. Phone: (303) 335-4584, email: building@louisvilleco.gov. Office hours: Monday-Thursday 8AM-4PM (in-person; remote 4PM-5PM); Friday 8AM-5PM remote/by appointment only; Tuesday 11AM-12PM limited staff availability (staff meeting). Inspection hours Monday-Friday 6:30AM-5PM.. Official information: https://www.louisvilleco.gov/local-government/government/departments/building-safety.

Louisville, Colorado has adopted: 2024 International Building Code (IBC), effective 12/6/2025 — City of Louisville Building Codes page; 2024 International Residential Code (IRC), effective 12/6/2025; 2024 International Energy Conservation Code (IECC), effective 12/6/2025; 2024 International Fire Code (IFC), effective 12/6/2025; 2024 International Plumbing Code (IPC), effective 12/6/2025; 2024 International Fuel Gas Code (IFGC), effective 12/6/2025; 2024 International Mechanical Code (IMC), effective 12/6/2025; 2024 International Existing Building Code (IEBC), effective 12/6/2025; 2024 International Property Maintenance Code (IPMC), effective 12/6/2025; 2023 National Electrical Code (NEC), effective 1/5/2024; local amendment NEC 210.8(F) Exception #2 takes effect 9/1/2026 requiring GFCI protection on all new outdoor A/C units; 1997 Uniform Code for the Abatement of Dangerous Buildings, effective 12/6/2025; 1997 Uniform Housing Code, effective 12/6/2025; Colorado Model Electric Ready and Solar Ready Code, effective 12/6/2025; Louisville Fire Hardening Code — Ordinance 1884 (series 2024), updated by Ordinance 1891 (series 2025) and Emergency Ordinance 1913 (series 2026, effective 1/21/2026) — sets minimum fire-resistant construction standards for new construction, accessory structures, and repair/replacement of specific home systems (roofing, siding, decks, fencing, vents, gutters) to reduce wildfire spread risk; applies citywide, not limited to a mapped WUI zone; Louisville Municipal Code Chapter 15 — Buildings and Construction (local amendments and adoption-by-reference); Louisville Municipal Code Chapter 5.12 (Section 5.12.090) — Contractor Licensing: any contractor employed on a building project must be licensed with the City of Louisville and listed on the permit; Prior to 12/6/2025 the City operated under the 2018 ICC codes; the 2024 ICC code adoption ordinance and effective date are confirmed on the City's Building Codes page. Local amendments apply — see the Louisville overview page for the full list.

Louisville has adopted the 2024 International Plumbing Code (IPC), effective December 6, 2025, not the Uniform Plumbing Code.

Sources & verification

Verified against official sources. Last reviewed 2026-07-05.

Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Louisville building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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