Do I need a permit for a full bathroom remodel in
Evans, Colorado?

Evans, Colorado bathroom remodel permits — the key details

Evans Building Department requires a permit for any bathroom remodel that involves fixture relocation, new electrical circuits, tub-to-shower or shower-to-tub conversion, new exhaust-fan installation, or any wall framing changes. The threshold is deliberately low: even moving a toilet 18 inches to clear a door swing triggers permitting. The city adopts the 2021 International Building Code (IRC) and the 2020 National Electrical Code (NEC) with amendments from Weld County specifically addressing expansive clay and high-altitude drainage. Pressure-balanced or thermostatic mixing valves are required in all shower/tub valves per IRC P2708.2 to prevent scalding. Bathroom exhaust fans must be ducted to the exterior (not the attic) and sized per IRC M1505.1 based on room square footage; undersizing or venting into the attic is a common rejection and can trigger re-inspection fees. If your home was built before 1978, lead-paint rules apply: you must disclose lead risk and follow EPA RRP (Renovation, Repair, and Painting) protocols if you disturb any painted surfaces—violation fines start at $2,700 per instance in Colorado.

Waterproofing is the second major flashpoint. Evans and Weld County strictly enforce IRC R702.4.2 and R702.4.3, which require a continuous waterproofing membrane on shower walls and tub surrounds. The code specifies that cement board or fiber-cement board must be paired with a sheet-membrane (liquid or pre-applied) rated for wet locations; modern builders use Schluter Systems or Mapei Aqua Defense. Do-it-yourself approaches using just drywall + caulk will be rejected in plan review. Drain lines being relocated must comply with trap-arm length rules: the horizontal distance from the trap weir to the vent connection cannot exceed 3 feet 6 inches (IRC P3102), and Evans inspectors measure this strictly. If your old rough-in location does not allow proper venting—a common issue in older homes with basement drains—you may have to relocate the vent stack, which significantly increases cost and timeline.

Electrical requirements are tightly drawn. All receptacles in bathrooms must be GFCI-protected per NEC 210.8(A); additionally, all 15- and 20-amp circuits serving bathrooms must have AFCI (arc-fault circuit interrupter) protection per NEC 210.12(B). If you are adding a circuit for heated floor mats, a heated mirror, or an exhaust fan, you must show on your electrical plan how GFCI and AFCI are stacked or separated. Evans' plan reviewer will reject submissions that do not explicitly label each circuit's protection method. Ventilation fans drawing more than 50 CFM must be hard-wired (not plug-in), and the circuit must be on a dedicated breaker if the fan draws more than 1 amp at operating voltage. These details must appear on a single-line electrical schematic submitted with your permit application; many homeowners omit this step and face a rejection notice requiring a 7-10 day resubmission.

The City of Evans Building Department operates a permit portal on its website, but unlike some Colorado Front Range towns, it does not offer over-the-counter approval for bathroom work. You must upload PDF files of your plumbing layout, electrical schematic, and any waterproofing details (photos or specification sheets) before the city will assign a plan reviewer. This typically takes 3–5 business days; the reviewer then has up to 15 days to issue a comment letter or approval. Rejection is common on first submission—Weld County's waterproofing and GFCI checklists are detailed—so budget an additional 7–10 days for resubmission and re-review. Plan-review fees are bundled into the permit cost ($200–$800 depending on project value); there are no separate expedite options. Inspections are scheduled online through the portal, and the city requires at least 24 hours' notice. For a full bathroom remodel, you should expect rough-plumbing, rough-electrical, and final inspections; some inspectors will waive the drywall inspection if no walls are being moved.

Weld County's expansive-clay environment adds one more layer: if your home's foundation shows any signs of differential settlement (cracking, sloping floors), you may be required to hire a structural engineer to sign off on any plumbing or drainage work that creates concentrated loads near the foundation. This is rare for typical bathroom remodels, but it is worth mentioning if your home is older than 1990 and sits on a concrete slab in the lower elevation areas of Evans. The cost of a structural review runs $500–$1,500, but it can prevent costly foundation issues down the road. Owner-builders are allowed in Colorado for owner-occupied single-family and duplex homes, so if you are the homeowner, you can pull the permit yourself and do the work (or hire licensed subcontractors for plumbing, electrical, and mechanical trades). However, you remain responsible for all inspections and code compliance—Building Department staff will not coach you through the remodel.

Three Evans bathroom remodel (full) scenarios

Waterproofing in Colorado bathrooms: why Evans code is strict

Colorado's high-altitude, low-humidity climate creates an unusual challenge for bathrooms: vapor transport is rapid, and shower enclosures that fail to properly seal moisture will lead to mold in wall cavities within 6–12 months. Evans and Weld County adopted strict waterproofing language in their amendments to IRC R702.4.2 specifically because of the region's climate. The code requires a continuous membrane (Schluter Systems, Mapei, or equivalent) applied over cement board or fiber-cement board on all surfaces subject to direct water spray or saturation. Liquid membranes must cure fully (typically 24–48 hours) before tile is set, and the membrane must extend 12 inches beyond the tub or shower enclosure on all sides. Many homeowners and even some tile contractors cut corners by using drywall with silicone caulk, which fails in Colorado bathrooms because the low humidity wicks moisture through the drywall backing; Evans inspectors will reject this approach on first sight.

The city's plan reviewer will ask for either a product spec sheet (PDF from the membrane manufacturer showing use for bathrooms and Colorado climate) or high-resolution photos of the installed system (cement board, primer, membrane, curing time noted). Do not submit vague descriptions like 'waterproof membrane'—name the product. Weld County's building safety office has seen insurance claims denied because of improper waterproofing, and they have shifted the burden to the permit reviewer to verify before final inspection. If your contractor says 'we always use Kerdi or Aqua Defense,' ask for a spec sheet and include it in your permit application; it will speed review by 5–7 days.

For shower pans specifically, Evans code requires either a pre-sloped concrete pan with a membrane liner (industry standard) or a tileable pan liner system (Schluter Shower Pan, Wedi, or similar). A bare membrane on a flat floor followed by mortar bed is not acceptable because mortar cracks, and the membrane becomes a puncture risk. Trap-pan slope must be 1/4-inch per foot minimum toward the drain; the city's inspector uses a 10-foot level to check this on site. If your pan is out of slope, you will fail final inspection and be required to remove the tile and re-do the pan—a costly mistake that can delay project completion by 3–4 weeks.

Expansive clay, drainage, and Evans' unique inspection focus

Evans sits on the Front Range alluvial plain, where bentonite clay is common in soil profiles below 30 inches frost depth. This clay swells when saturated and shrinks when dry, causing differential settlement that can crack foundations and disrupt underground utilities. Weld County's building amendments specifically address this by requiring that any new or relocated underground drainage (including bathroom waste lines) be routed to avoid direct contact with native clay if possible. For typical bathroom remodels, this means you should route your new toilet or shower drain to an existing stack that already drains to the main sewer line (rather than creating a new trench). If a new trench is unavoidable, Weld County's code calls for bedding the pipe in sand (not clay) and wrapping it with permeable geotextile to allow drainage while preventing clay particles from clogging the pipe. Evans Building Department's inspector will ask to see the drainage plan before final sign-off; if you are uncertain about soil conditions, hiring a site geotechnical assessment ($400–$600) is cheaper than a rejected inspection.

The practical consequence is that Evans inspectors are unusually thorough on rough-plumbing inspection. They will ask to see the slope of the waste line, the pipe bedding material (sand, gravel, or engineered fill), and the vent-stack routing. If you pour concrete on top of a drain line without proper compaction and bedding, the inspector may require you to excavate and re-do it. Plan an extra week into your timeline for this inspection; it is not a quick pass-and-go. If your contractor is unfamiliar with Front Range soil issues, you may want to hire a plumber who has worked in Weld County before; their familiarity with the inspection protocol will save you delays.

One more note: if your bathroom is in the basement and sits below the main sewer line elevation, you will need a sewage ejector pump. Evans Building Department requires that the pump have a backup power system (battery or generator) if the bathroom is occupied year-round. The pump chamber must be accessible (removable lid, not buried), sized to handle 2-year storm events, and vented to the exterior with a check valve. This can add $2,000–$4,000 to the project, and many homeowners discover this requirement during plan review. If your home already has a sump pump, you may be able to tie the bathroom drain to the sump system, but the city requires a licensed plumber to sign off on this approach.

Common questions