Do I need a permit for a full bathroom remodel in
Farmington, NM?

Farmington full bathroom remodel permits — the key details

The threshold for a Farmington bathroom remodel permit is straightforward: any work that touches plumbing, electrical, or framing requires permits. The City of Farmington Building Department follows the 2021 IBC, which means IRC P2706 (drainage and vent sizing), IRC E3902 (GFCI outlet requirements — now mandatory within 6 feet of any sink, bathtub, or shower), and IRC M1505 (exhaust fan minimum 50 CFM for bathrooms under 100 sq ft, 1 CFM per sq ft for larger baths). If you are relocating a toilet, sink, or shower drain, you must pull a plumbing permit and have rough plumbing inspected before drywall closes. If you are adding a new electrical circuit for a heated mirror, ventilation fan, or lighting, you need an electrical permit and rough electrical inspection. If you are converting a bathtub to a walk-in shower, you must submit a shower waterproofing detail (cement board + liquid membrane, or equivalent) because the code requires a water-resistant assembly behind all tile per IRC R702.4.2. Many Farmington homeowners underestimate the electrical GFCI requirement—the city's inspectors are strict about this, and failure to install GFCI-protected outlets (or AFCI breakers on lighting circuits in bedrooms adjacent to the bath) will cause a re-inspection.

Farmington's online permit portal (accessible through the city website) requires you to submit a completed application, a scaled floor plan showing fixture locations before and after, electrical and plumbing schematic drawings (not just a sketch—the city wants pipe sizing, vent routing, and outlet placement), and a written description of the work scope. For tub-to-shower conversions, you must include the waterproofing system specification (e.g., 'Schluter Kerdi system' or '1/2-inch cement board + RedGard liquid membrane') and a detail sketch showing flashing at the valve penetration and pan curb height. The plumbing plan must show trap-arm lengths (maximum 4 feet horizontal run from trap to vent under IPC Chapter 3), drain sizing (toilet 3-inch minimum, sink 1.5-inch, shower 2-inch), and vent termination (must exit roof or wall above finished grade, no open ends). The electrical plan must show all new circuits, breaker sizes, wire gauge, outlet heights (15 inches AFF for vanity counters is typical), and GFCI locations. Failure to include these details will trigger a re-submittal request, adding 1-2 weeks to the approval timeline. Owner-builders must provide a signed affidavit stating the work is being performed on their own owner-occupied residence; the city requires proof of ownership (deed or property tax statement) and a valid ID.

Permit fees in Farmington run as follows: the base building permit for bathroom remodels is typically $300–$500, calculated at roughly 1-2% of the estimated construction cost (the city asks you to self-value the project on the application). A separate plumbing permit adds $100–$150. A separate electrical permit adds another $100–$150. Plan review takes 2-3 weeks for standard scopes; if the city identifies a deficiency (waterproofing spec missing, GFCI not shown, exhaust duct routing unclear), they issue a Requests for Information (RFI) and restart the clock. Inspection fees are typically bundled into the permit cost, though the city charges for expedited inspections if you request them. Many Farmington contractors bundle multiple inspections (rough plumbing, rough electrical, framing) in one visit to save time, but the city allows this only if all trades are ready simultaneously. The New Mexico Building Code does not mandate final walk-through inspections for interior remodels as strictly as some other states, but Farmington's practice is to require at least a final plumbing and electrical inspection before issuing a Certificate of Occupancy or completion document. If you are working in a home built before 1978, lead-paint disclosure and lead-safe work practices (EPA RRP certification) are federally required, but Farmington does not add a separate permit fee for this—it is your responsibility to hire certified contractors.

Waterproofing and ventilation are the two areas where Farmington inspectors most commonly reject initial submissions. For shower enclosures, the city interprets IRC R702.4.2 strictly: the entire wall behind the shower (from the pan to the top of the enclosure) must be covered with a water-resistant membrane. Cement board alone is not sufficient—you must apply a liquid or sheet membrane over it (Schluter, RedGard, Kerdi, or equivalent). Audible gaps or incomplete coverage will be flagged during rough framing inspection. For exhaust fans, IRC M1505 requires a minimum 50 CFM capacity for bathrooms under 100 sq ft, with ductwork terminating to the outside (roof or wall, not into the attic). The city will ask for the fan model and CFM rating on the electrical plan, and the duct material and diameter (typically 4 inches minimum). If the ductwork path is complex or runs more than 10 feet, you should include a routing sketch to avoid re-inspection delays. Pressure-balanced or thermostatic shower valves are not mandatory under code, but the city will approve any valve that is UPC-listed; cartridge valves are preferred because they are less prone to scald complaints.

Timeline expectations: submitting a complete package (application + plans) on a Monday typically results in plan review by Friday of the same week. If the city has questions, they will email you an RFI within 2-3 business days. Resubmitting corrected plans restarts the review clock for another 3-5 days. Once approved, permits are valid for 180 days; if you don't start work within that window, the permit expires and you must re-apply. Inspections are scheduled by phone or through the portal and typically occur within 2-3 business days of your request. Rough inspections (plumbing, electrical, framing) usually take 30-45 minutes; final inspection takes 15-20 minutes. If the inspector finds deficiencies, you have 30 days to correct and request a re-inspection. Most full bathroom remodels in Farmington take 4-6 weeks from permit application to final sign-off, assuming no major code violations or scope changes mid-project. Weather (heavy snow, extreme heat) occasionally delays drywall and tile work, but does not affect permit processing times.

Three Farmington bathroom remodel (full) scenarios

Waterproofing and the IRC R702.4.2 inspection gauntlet

Farmington Building Department's interpretation of IRC R702.4.2 (water-resistant assemblies for bathrooms) is one of the strictest in northern New Mexico, and it is the leading cause of re-inspection requests on bathroom remodels in the city. The code requires that all areas subject to water spray (shower walls, tub surrounds) have a water-resistant membrane. Many homeowners and even some contractors think cement board is enough, but Farmington's inspectors will fail a rough framing inspection if you have not applied a liquid or sheet membrane over the cement board. The acceptable systems are: 1) cement board + liquid-applied membrane (RedGard, Aqua Defense, Schluter Kerdi-Fix), 2) cement board + sheet membrane (Schluter Kerdi, Wedi Backer Board, or equivalent), 3) pre-fabricated waterproof panels (Wedi, USG Durock, Schluter), or 4) membrane-laminated drywall (limited use, usually only for non-shower walls). The inspector will ask to see the membrane material name, the application method (brush, roller, trowel), and will check that seams and penetrations (shower valve, trim, curb) are sealed. For a tub-to-shower conversion, this means you must order the waterproofing material in advance and plan for 24-48 hours of cure time before tiling. The city does not require shop drawings for waterproofing, but your permit submission must include a one-paragraph description of the system and, ideally, a link to the manufacturer's instructions. If you skip this detail in your initial plan submission, expect an RFI email within 3-5 business days asking you to clarify.

The rough plumbing inspection is where the waterproofing detail gets checked. The inspector will observe that the membrane is in place and properly sealed around the valve rough-in before you close the wall. If the membrane is missing or incomplete, the inspector will issue a re-inspection notice and you will have 7-14 days to correct and re-submit. Correcting waterproofing after drywall is closed is far more expensive (you must cut open the wall, re-install the membrane, and re-drywall), so getting it right the first time is critical. Farmington's climate (semi-arid, 4B-5B zone) actually works in your favor here—the city does not have the mold risk that wetter climates face, but the inspectors are nonetheless vigilant because they know that a single pinhole in the membrane can lead to structural rot in the long term, especially if a homeowner later tiles over a failed membrane and traps moisture. Liquid membranes (RedGard, Aqua Defense) are the most common choice in Farmington because they are cheaper than sheet systems ($200–$400 for a typical 5x8 bathroom) and easier to apply. Sheet membranes (Schluter Kerdi) cost more ($400–$700) but are faster to install and come with factory-sealed seams. Both are code-compliant; the city will not prefer one over the other, provided the system is installed per the manufacturer's instructions. Pre-fabricated panels (Wedi) are gaining popularity and are pre-waterproofed, so no separate membrane is needed, but they are the most expensive option ($800–$1,200 for a typical bathroom) and require skilled installation. Once the membrane is inspected and approved, tiling can proceed without further waterproofing inspection.

Electrical GFCI and AFCI requirements in Farmington bathrooms

Farmington enforces the 2021 NEC (National Electrical Code) as adopted by New Mexico, which means all bathroom outlets and circuits must comply with GFCI (ground-fault circuit interrupter) protection within 6 feet of a sink, tub, or shower. In a full bathroom remodel, this typically means every outlet in the bathroom must be GFCI-protected, either through a GFCI receptacle (the outlet itself has the test/reset buttons) or a GFCI breaker (the circuit breaker in the panel has test/reset buttons and protects all outlets downstream). Most electricians in Farmington use GFCI receptacles at the first outlet on a circuit, which is cheaper than a GFCI breaker but requires extra work if you want the whole circuit protected. Additionally, any lighting circuit that runs through an adjacent bedroom (e.g., a bedroom light near the bathroom) must have AFCI (arc-fault circuit interrupter) protection per NEC 210.12(C). This is a common point of confusion: the lighting circuit does not have to be in the bathroom, but if it is within 6 feet of the bathroom and runs through a bedroom, it needs AFCI. Farmington's inspectors will ask to see the GFCI and AFCI breaker locations on your electrical plan; failure to show them will result in an RFI and plan re-submittal.

The practical implication is that a heated mirror, ventilation fan, and recessed lighting in a 1970s bathroom often require two new circuits: one 20-amp GFCI circuit for the mirror and fan (sharing or separate, depending on total load), and one 15-amp AFCI circuit for the recessed lights if the circuit runs near the bedroom. Most modern bathrooms use 12 AWG wire (14 AWG is obsolete for anything over 15 amp) for new circuits to allow future upgrades. Farmington electricians typically charge $150–$300 for a simple new circuit (wire, breaker, outlet box), so adding two new circuits brings the electrical cost to $300–$600 for labor alone, plus permit fees ($100–$150) and materials ($100–$200). If you are in an older home (pre-1990), the existing bathroom may have a single 15-amp circuit serving all outlets and lighting, which is no longer code-compliant. The city will not force you to upgrade an existing circuit during a remodel if you are only replacing fixtures in-place, but if you add any new outlets or circuits, all bathroom outlets must be GFCI-protected by the end of the project. During the rough electrical inspection, the inspector will test the GFCI outlets with a test button (every GFCI-protected outlet must trip when tested) and verify that the wire gauge, breaker size, and circuit layout match the plan. If a GFCI is not installed or does not trip, the inspection will fail and you will need to correct before the final inspection can proceed.

Common questions