Plumbing Permit in Evanston, Wyoming
VerifiedRequired for new plumbing installations, alterations, and irrigation system backflow prevention in Evanston. Issued and inspected locally by the City Building Department; charged under the City's general valuation-based building-permit fee schedule (no separate flat plumbing fee line).
Verified 2026-07-01 · Source
When you need this permit
- New fixture installations, re-piping, and water/sewer line work require a building permit
- Irrigation systems require backflow prevention per the 2021 Plumbing Code § 608.17.5 and Wyoming DEQ requirements (High Hazard Back Pressure classification) — a reduced-pressure-principle backflow prevention assembly is required where chemicals are introduced into the system
- Building permits and inspections are required for installation of irrigation systems
- Water tap and sewer/wastewater tap connections require City coordination — 48 hours' notice required prior to tap; all parts must be on-site and inspected before excavation
Required documents
- Opt
Airgap backflow preventer guidance
City of Evanston guidance on airgap-type backflow prevention for irrigation
- Opt
Reduced Pressure Backflow Preventer guidance
City of Evanston guidance on reduced-pressure backflow prevention for irrigation
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Building Permit Fee (covers plumbing work; no separate plumbing fee line) | $0.010 × project cost (minimum charge $30.00) | City of Evanston Engineering & Building Rate Sheet — plumbing work is charged under the general valuation-based building permit fee, not a separate trade-specific fee |
| Water Connect & Tap — 3/4" service (FY25-26) | $1,250.00 | City of Evanston Water Department Rate Sheet; scales up to $32,000 for 12-inch service |
| Wastewater/Sewer Connection & Tap — 3/4" service (FY25-26) | $1,500.00 | City of Evanston Water Department Rate Sheet; scales up to $38,250 for 12-inch service |
| Construction Water (per 1,000 gallons, up to 9,999 gal, FY25-26) | $10.00 | Tiers up to $16.00 per 1,000 gallons at 30,000+ gal; plus $20.00/month admin fee |
Review timeline
~1–10 business days
Typical estimate — confirm current times with the Evanston building department
Inspection process
- 1
Underground Plumbing
After underground plumbing installed and prior to covering/concrete
- 2
Rough Plumbing
After all waste, vent, and water piping installed
- 3
Sewer/Water Service Lines
Line connections inspected prior to backfilling trenches
- 4
Final
Fixtures connected, no leaks, water turned on only after meter installed and inspected
Tips
- Irrigation systems require a backflow preventer (airgap or reduced-pressure type) due to the High Hazard Back Pressure classification under the Plumbing Code and Wyoming DEQ requirements.
- The City makes all water taps up to 2 inches and all sewer taps (or inspects contractor-performed taps) — a 48-hour notice is required before tapping.
- No water will be turned on during construction until the meter is installed and inspected by the City.
Frequently asked questions
- Do I need a permit to install a lawn sprinkler/irrigation system in Evanston?
- Yes. Building permits and inspections are required for installation of irrigation systems in Evanston, and a backflow preventer (airgap or reduced-pressure type) must be installed per the Plumbing Code and Wyoming DEQ requirements.
Sources & verification
Verified against official sources. Last reviewed 2026-07-01.
- City of Evanston Engineering & Planning Department — Building Department — official building department
- City of Evanston — Irrigation Systems
- City of Evanston Building Permit Legal Requirements
- City of Evanston Water Department Rate Sheet (FY25-26 tap/connection fees)
- City of Evanston Engineering & Building Rate Sheet
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 Evanston building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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