Bathroom Remodel Permit in Paramount, CA (2026)

Research by DoINeedAPermit Research Team · Updated May 2026

The Short Answer

A full bathroom remodel in Paramount requires a permit if you are relocating plumbing fixtures, adding electrical circuits, installing a new exhaust fan, converting a tub to shower, or moving walls. Cosmetic-only work (tile, vanity replacement in place, faucet swap) is exempt.

Paramount's Building Department applies California Title 24 energy code and the current California Building Code (IBC/IRC equivalents), but the city's actual permit intake and plan-review process is notable for its dual-track system: simple cosmetic bathroom work can often be filed as a low-risk 'over-the-counter' permit (same-day review if drawings are minimal), while any fixture relocation or electrical work triggers full plan review, typically 2–5 weeks. Paramount is part of Los Angeles County, so you are also subject to county fire-code amendments (particularly exhaust-fan termination height and duct materials in fire-zone areas). The city's online portal (https://www.paramountca.gov/) now requires electronic submission for most bathroom permits, and the Building Department has tightened enforcement on pre-1978 lead-paint disclosure — if your home was built before 1978, you must include a lead-safe work plan even if you are only remodeling the bathroom. Permit fees in Paramount run $300–$800 depending on the scope of work (plumbing vs. electrical vs. both), and the city charges based on a percentage of the declared construction cost, typically 1.5–2% for interior work. Unlike some Bay Area or inland-valley jurisdictions, Paramount does not have expansive-clay or seismic-bracing surcharges for bathrooms, but the coastal climate (3B–3C zone near the Long Beach area) means the city enforces strict waterproofing and exhaust-fan venting requirements to prevent mold.

What happens if you skip the permit (and you needed one)

Stop-work orders issued by Paramount Building Department carry $500–$2,000 fines per violation, and unpermitted plumbing work may trigger a lien on your property.
Homeowners insurance will deny claims for water damage (burst supply line, mold from inadequate exhaust venting) if work was not permitted and inspected.
When you sell, California requires disclosure of unpermitted work on the Transfer Disclosure Statement (TDS) — a red flag that will kill appraisals and loan approval for 70% of buyers.
Refinancing or home-equity loans will be blocked: lenders run title searches and verify permits before closing, and unpermitted bathroom work can delay or kill the transaction entirely.

Paramount bathroom remodel permits — the key details

The threshold for a permit in Paramount is straightforward: any bathroom work that involves moving a fixture, adding a new electrical circuit, installing or replacing an exhaust fan with new ductwork, converting a tub to a shower (or vice versa), or moving or removing a wall requires a permit. California Building Code Title 24 (Energy Commission) and the IRC (which California adopts with amendments) set the baseline, and Paramount enforces these without significant local divergence. However, the city's Building Department is explicit about one exemption: if you are replacing a toilet, sink, or faucet in the same location with the same supply and drain routes, no permit is needed. Similarly, cosmetic tile work, vanity resurfacing, lighting fixture swaps (if the electrical box is not moved), and medicine-cabinet replacement do not trigger a permit. The distinction is functional change versus like-for-like swap. This exemption is printed on the city's permit-exemption matrix (available on the Paramount Building Department website), and many homeowners rely on it to avoid costs — but the moment you move a toilet 3 feet or add a second sink, you cross into permit territory.

Plumbing and drainage are the most common triggers for Paramount bathroom permits. The IRC Section P2706 (drainage fittings) and Section P2710 (drain slope and trap rules) apply: drain lines must slope 1/4 inch per foot minimum, trap arms cannot exceed 6 feet (or 8 feet with a vent offset), and all drains must be vented within 5 feet of the trap. Paramount's Building Department enforces these rigorously because the city's coastal location and older housing stock mean settling foundations and shifted plumbing are common problems. When you relocate a toilet or add a second bathroom sink, the plan must show the new drain route, trap location, vent routing, and slope calculations. If your home was built before the 1990s, the existing drain stack may not have the capacity for a new fixture, and you may need to upsize the main vent or add a new one — a costly surprise that only a permit plan will catch. The city's plumbing inspector will also verify that any new supply lines are 1/2-inch copper, PEX, or approved plastic (galvanized steel is not allowed anymore), and that anti-scald valves (pressure-balanced or thermostatic mixing valves) are installed on any tub or shower valve per IRC Section P2708.2. This requirement exists because California has strict burn-prevention rules.

Electrical work in a bathroom is heavily regulated and is the second-largest permit trigger. IRC Section E3902.1 requires GFCI (ground-fault circuit interrupter) protection on all bathroom outlets within 6 feet of a sink or tub. If you are adding a new circuit for a heated towel rack, ventilation fan, or additional outlets, you must file an electrical permit (which can be bundled with the bathroom permit), and the work may only be done by a licensed electrician or the homeowner as an owner-builder (under California Business & Professions Code Section 7044, which requires a state ID and a separate owner-builder permit). Paramount's Building Department requires an electrical plan sheet showing the panel, circuit breaker, wire gauge, and GFCI location. Additionally, any exhaust fan or ventilation work that involves new wiring must be shown on that same electrical plan. The city also enforces AFCI (arc-fault circuit interrupter) requirements in some cases — check with the inspector, as this can vary by the age of your panel and local amendments. Many homeowners skip the electrical permit and hire an unlicensed 'handyman' to run new circuits, but the city's plan reviewer will spot missing GFCI protection on the inspection and will red-tag the work, forcing a licensed electrician to fix it at double the original cost.

Waterproofing and exhaust ventilation are critical code points in Paramount, especially for shower conversions or any full-gut remodel. IRC Section R702.4.2 specifies that any new shower or tub enclosure must have a water-resistant backing (cement board, foam board, or gypsum sheathing with a vapor-retardant facing) AND a membrane (sheet membrane, paint-on membrane, or liquid-applied membrane) behind all tile. Paramount's Building Department requires you to specify the exact waterproofing system on the permit plan — not just 'waterproofing membrane' but the brand, thickness, and installation method. Common rejections occur when homeowners plan to use only cement board without a sheet membrane, or when they specify a membrane but do not show proper overlap and sealing at corners and penetrations. The IRC Section M1505.2 mandates that all bathrooms have an exhaust fan that either vents directly to the outdoors (not into an attic) and operates at a minimum 20 CFM (or 50 CFM for a bathroom with a toilet). The duct must be 4 inches in diameter (or equivalent), insulated if it runs through an unconditioned space, and terminated at least 12 inches above grade in coastal zones (Paramount is coastal, zone 3B–3C) and at least 12 inches above the roof eave. Plan rejections are common when the duct termination point is not shown, or when homeowners plan to run the exhaust into an attic (a code violation that causes mold). The city also requires a damper or check valve on the duct to prevent backflow. If you are installing a new exhaust fan in an existing bathroom, the permit will include a ductwork routing and termination detail.

Paramount's permit process is now fully digital. You must submit your application, plans, and contractor information through the city's online portal (accessible via the Paramount Building Department website), along with a digital copy of a property survey or assessor's parcel map and proof of ownership. The city charges a permit application fee ($50–$100) plus a construction-cost-based fee (typically 1.5–2% of the declared construction cost for interior bathroom work, so a $15,000 bathroom remodel would incur approximately $225–$300 in construction fees, for a total permit cost of $275–$400). A cosmetic bathroom permit (no fixture relocation) may qualify for an over-the-counter same-day review and can cost as little as $150. Plan review typically takes 2–5 weeks, and the city will issue a list of corrections (called a 'Request for Information' or RFI) if waterproofing, electrical circuits, plumbing slopes, or exhaust-duct termination details are missing. Once approved, you are issued a permit card and can schedule inspections: rough plumbing (before walls are closed), rough electrical (before drywall), framing (if walls are being moved), drywall and waterproofing (before tile), and final. Each inspection typically takes 1–3 days to schedule, so a full bathroom remodel with permits can take 8–12 weeks from permit issuance to final approval, not counting construction time.

Three Paramount bathroom remodel (full) scenarios

Scenario A

Like-for-like vanity and faucet swap, same drain and supply locations, Paramount single-story home

You are replacing an aging pedestal sink with a new 30-inch vanity and faucet in the exact same location, using the existing 1.5-inch drain line and the existing hot/cold supply stubouts. The new vanity is installed in the same footprint, and no walls, plumbing routes, or electrical circuits are changed. This is a cosmetic replacement and does not require a permit under Paramount's exemption rule. You do not need to file with the Building Department, no inspection is required, and you are not liable for a stop-work order. However, if you are not confident that the existing drain and supply are code-compliant, or if you are installing new tile backsplash behind the vanity (which may require waterproofing if the old wall was not waterproofed), it is wise to have a licensed plumber evaluate the existing rough-in before starting. Cost: $0 in permit fees. Typical vanity-and-faucet replacement cost runs $1,500–$3,500 including labor and materials, with no permit delays.

Scenario B

Moving toilet 4 feet, adding a second sink, new exhaust fan with ductwork, Paramount 1970s home

Your 1970s Paramount bathroom is small, and you want to relocate the toilet to the opposite wall (about 4 feet) and add a pedestal sink in the original toilet location. You are also installing a new exhaust fan because the current one is broken and vents into the attic (code violation). This triggers multiple permit requirements: plumbing (toilet relocation — new drain route, new vent connection, slope calculations), plumbing (new sink drain and vent), and HVAC/electrical (new exhaust fan and ductwork with outdoor termination). You file a single combined bathroom-remodel permit with the Paramount Building Department, including plumbing and electrical plans. The plumbing plan must show the existing 3-inch main stack, the new 2-inch toilet drain line sloping 1/4-inch per foot from the new toilet location to the stack (maximum 6-foot trap arm), the new 1.5-inch sink drain and vent, and the vent routing to the roof. You must specify the waterproofing for any areas where walls are opened (if you are tiling around the toilet base). The electrical plan must show a new 20-amp dedicated circuit for the exhaust fan (if hardwired with a motion sensor or timer), GFCI outlets on the sink, and the damper/check valve on the exhaust duct. The duct termination must be shown at least 12 inches above the roof eave, with proper insulation through the attic space. You submit the permit application online with a floor plan showing the before/after fixture locations, a plumbing schematic, and an electrical one-line diagram. Permit fee is approximately $400–$600 (based on ~$20,000 remodel cost at 2% rate, plus construction-cost fees). Plan review takes 3–4 weeks; the city will likely issue one RFI asking for clarification on vent routing or exhaust-duct termination. Once approved, you schedule rough-plumbing (1–2 days after permit issuance), rough-electrical (same day or next), wall opening/prep, framing (if walls are tweaked), waterproofing/tile (with inspector verification of waterproofing system), and final inspection. Total timeline 10–14 weeks from permit issuance to final approval. If the existing main drain stack is found to be undersized or blocked (common in 1970s homes), you may need to camera the line or upsize the vent — an additional $1,000–$2,500 cost discovered during rough-in inspection.

Scenario C

Master-bath tub-to-shower conversion, waterproofing detail, pre-1978 home with lead-paint disclosure, Paramount

Your Paramount home was built in 1965, and you are converting the master-bath soaking tub (in place, not relocated) to a walk-in shower with frameless glass enclosure. Although the tub and shower occupy the same space, the code treats this as a change in waterproofing assembly: the old tub surround (likely 4x4 ceramic tile on plaster) does not meet modern waterproofing standards for a shower. You must file a bathroom-remodel permit because IRC Section R702.4.2 requires that all new shower enclosures have a water-resistant backing (cement board, foam board, or gypsum sheathing with a vapor-retardant facing) and a waterproofing membrane (sheet or liquid-applied). Paramount's Building Department will require your permit plan to specify the exact waterproofing system — for example, 'durock cement board, 6-mil polyethylene vapor barrier, and Schluter-Kerdi sheet membrane, with Schluter-Ramp pre-slope for drain and sloped substrate per manufacturer.' The permit application must also include a lead-safe work plan because the home was built before 1978; under California's RRP (Renovation, Repair, and Painting) rule, you are required to use a lead-certified contractor and containment procedures. This adds about $500–$1,000 to the project cost. The plumbing plan must show the existing drain (if reused) and verify that it has a proper trap and vent connection; if the new shower location requires a new drain line, that must be shown as well. The fixture (shower valve) must be pressure-balanced or thermostatic mixing valve per IRC P2708.2. The permit fee is approximately $350–$500 (based on a ~$16,000 remodel at 2% rate). Plan review takes 3–4 weeks; expect one RFI asking for confirmation of the waterproofing-system brand and installation details, or for clarification that lead-safe work practices will be used. Once approved, inspections include rough plumbing (drain and supply rough-in), waterproofing and membrane application (inspector verifies membrane overlap and seal at drain penetration, corners, and substrate), tile installation (visual check for proper slope to drain), and final (test drain for slope, verify valve operation, check exhaust-fan damper). The lead-safe work adds 1–2 weeks to the timeline due to containment setup and post-work dust testing. Total cost for the tub-to-shower conversion is typically $15,000–$25,000 (including the lead-remediation premium), with a permit timeline of 12–16 weeks.

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Paramount's waterproofing requirements and ceramic-tile installation standards

Paramount is located in a coastal climate zone (3B–3C per IECC), and the city's Building Department enforces California Building Code requirements for water-resistant construction in bathrooms with particular strictness because the marine environment (salt air, humidity, and occasional coastal flooding) accelerates mold growth and structural decay. The IRC Section R702.4.2 is the baseline, but Paramount's interpretation (as stated in the building official's policies and in past inspection reports) requires that all shower and tub enclosures have a minimum three-layer waterproofing assembly: (1) a substrate (cement board, foam board, or gypsum sheathing with moisture barrier), (2) a waterproofing membrane (sheet membrane such as Schluter-Kerdi or Nobleseal, or paint-on/liquid-applied membrane such as RedGard or Hydro Ban), and (3) tile and grout. Many homeowners and contractors cut corners by installing tile directly on drywall with no membrane — a common code violation that Paramount's inspector will red-tag during the rough-waterproofing inspection.

When you submit your bathroom-remodel permit, the plumbing or general plan must include a waterproofing detail drawing (a cross-section showing the wall assembly from framing to tile). The detail must identify the substrate material by brand (not just 'cement board' but 'Durock USG cement board, 1/2-inch'), the membrane type and thickness (e.g., 'Schluter-Kerdi sheet membrane, 4 mm, installed per manufacturer with 4-inch overlap at seams'), and the grout and sealant (e.g., 'epoxy grout, sanded, with silicone caulk at substrate-to-tile transitions'). The city also requires that the detail show the slope to the drain (for a tile shower, the substrate must be sloped 1/8 inch per foot toward the drain using a sloped substrate pan or a sloped mortar bed). If you miss these details on your permit plan, the city will issue an RFI, and you will have to resubmit — adding 1–2 weeks to plan review.

One often-missed requirement in Paramount is the exhaust-fan termination in relation to roof eaves and overhangs. Because the city is coastal and susceptible to wind-driven rain, the duct termination cap must be positioned at least 12 inches above the roof eave (not just at the soffit level) to prevent rain from being blown back into the duct and dripping into the attic. Additionally, the duct itself must be insulated if it runs more than 5 feet through an unconditioned attic space, and it must have a manual or motorized damper (check valve) to prevent backflow and critter entry. Many contractors vent to the roof edge and call it done, but Paramount's inspector will reject this if the termination cap is less than 12 inches above the eave.

Electrical circuits, GFCI protection, and owner-builder rules in Paramount bathrooms

Paramount enforces California's electrical code (NEC 2022 via CEC Title 24), which mandates GFCI protection on all bathroom outlets within 6 feet of a sink, tub, or shower per Article 210.52(D). This means every outlet in a bathroom — including a heated towel rack, ventilation-fan switch, or wall-mounted heater — must be on a GFCI-protected circuit. In modern construction, this is usually a GFCI receptacle (outlet) or a GFCI breaker in the main panel. If you are adding a new exhaust fan, heated towel rack, or heated mirror, you typically need a new dedicated 20-amp circuit hardwired to a GFCI breaker. The permit electrical plan must show the circuit breaker, wire gauge (14/2 for a 15-amp circuit, 12/2 for a 20-amp), conduit routing, and GFCI location. Paramount's Building Department enforces this rigorously because GFCI protection saves lives in wet environments.

A critical point for homeowners: in California, electrical work on bathrooms can only be done by a licensed electrician OR by the homeowner under the owner-builder exception in Business & Professions Code Section 7044. If you want to do electrical work yourself, you must obtain a separate owner-builder permit from Paramount (not included in your bathroom-remodel permit), pay a small fee (~$50), and pass a state exam or provide proof of experience. Many homeowners assume they can hire a handyman or a general contractor to run a new circuit, but this is illegal in California. If Paramount's inspector discovers unlicensed electrical work, the city will issue a stop-work order, fine you $500–$1,500, and require a licensed electrician to redo the work at double cost. The bathroom-remodel permit plan will make clear whether electrical work is included, and the city will verify the contractor's license before approving the permit.

One overlooked detail: if your home is older and the main panel is a 60-amp or 100-amp service (common in 1960s–1980s homes), adding a new 20-amp bathroom circuit may require a panel upgrade to 150 or 200 amps. This is discovered during plan review or rough-in inspection and can add $2,000–$4,000 to the project. A licensed electrician will review the existing service capacity during the permit consultation phase, and if an upgrade is needed, it will be flagged and must be completed before the bathroom work begins. Paramount's Building Department has no exception for old panels, so this is non-negotiable.

City of Paramount Building Department
Paramount City Hall, 16400 Colorado Avenue, Paramount, CA 90723
Phone: (562) 220-2220 (main) or check the city website for the Building Department direct line | https://www.paramountca.gov/ (check for the online permit portal or permitting system link)
Monday–Friday, 8:00 AM – 5:00 PM (verify current hours on the city website; some jurisdictions have adjusted hours)

Common questions

Do I need a permit to replace a broken exhaust fan with a new one in the same location?

If you are removing the old fan and installing an identical new fan in the same location with the same ductwork, Paramount may allow this as a cosmetic replacement if no new wiring or duct routing is involved. However, if the old duct went into the attic (a code violation), Paramount's inspector will require that the new duct be rerouted to terminate outdoors, which requires a permit. Most exhaust-fan replacements in Paramount trigger a permit because the existing installation is often non-compliant (attic termination, undersized duct, no damper). Check with the Building Department before starting — a quick phone call can save thousands in fines if you redo non-compliant work. Cost: If a permit is required, $200–$350 for an exhaust-fan-only permit.

What is the maximum length of a drain trap arm in Paramount?

The IRC Section P2710.1 (adopted by California and enforced by Paramount) limits a trap arm to 6 feet in horizontal length before the vent connection, or 8 feet if a vent is installed within 5 feet of the trap. This rule prevents slow drains and siphoning. Paramount's plumbing inspector will measure the trap-arm distance during rough-in inspection, and if it exceeds 6 feet without a vent within 5 feet, the work will be red-tagged and must be corrected. When you relocate a toilet or sink, the plumbing plan must show the trap-arm length and vent connection point; if the distance is marginal, the plan reviewer will request clarification before approval.

If my home was built before 1978, what extra work is required for a bathroom remodel?

California's RRP (Renovation, Repair, and Painting) rule requires that any work disturbing painted surfaces in a pre-1978 home (including bathroom remodels) must be performed by a lead-certified contractor using containment, HEPA filtration, and post-work dust testing. You cannot hire a standard contractor without lead certification. Paramount's Building Department will ask for proof of lead-safe certification during the permit application, and if any lead hazard is found (via an XRF lead test), the work scope expands to include encapsulation or removal. Cost: Lead-safe work adds $500–$1,500 to a bathroom remodel. Your contractor must provide a lead-safe work plan with the permit application.

Can I do a bathroom remodel without a permit if I use a licensed contractor?

No. The permit is required by the Building Department, not by the contractor. Even a licensed plumber or electrician cannot legally start work without a permit. If they do, Paramount can issue a stop-work order on the property, fine the contractor and the homeowner, and require unpermitted work to be torn out and redone under permit. The permit is a city requirement, not a contractor preference. Always confirm that your contractor has applied for and received a permit before any work begins.

How long does plan review take for a bathroom remodel in Paramount?

Paramount's standard plan-review timeline is 2–5 weeks for bathroom-remodel permits. If your plans are complete and clear (showing plumbing slopes, electrical circuits, waterproofing details, and exhaust-duct termination), you may get approval in 2–3 weeks. If the city issues a Request for Information (RFI) asking for clarification — common for waterproofing details or duct routing — you will resubmit, and the clock resets for another 1–2 weeks. Expedited review (5–7 days) is not typically available for bathrooms. Budget 4–5 weeks from submission to permit issuance.

What inspections do I need for a full bathroom remodel in Paramount?

For a full bathroom remodel with fixture relocation and new waterproofing, you will typically have 4–5 inspections: (1) rough plumbing (drain, supply lines, vent connections before walls close), (2) rough electrical (new circuits, GFCI breaker before drywall), (3) framing/structural (if walls are moved; may be skipped for fixture-only work), (4) waterproofing/drywall (membrane and tile substrate before tile installation, particularly critical for shower enclosures), and (5) final (all fixtures in, tile complete, exhaust fan operational, GFCI tested). Each inspection must be scheduled through the Building Department, and the inspector will typically arrive within 1–3 business days of the scheduled date. You are required to have the work ready for inspection (rough-ins exposed, membranes laid but not covered) at the time of the appointment.

Can I add a second bathroom to my Paramount home, or is it limited by code?

Adding a second bathroom is allowed and follows the same code path as remodeling an existing bathroom — plumbing, electrical, and waterproofing permits are required. However, if your home's water and sewer service was sized for only one bathroom, adding a second may require service upgrades (larger meter, increased sewer capacity), which can cost $2,000–$5,000 and extend the permit timeline. The Building Department will verify existing utility capacities during plan review. Also, California's Title 24 energy code now requires that all bathrooms (including new ones) have exhaust fans with automated humidity sensors or continuous ventilation, which adds to the electrical work. A new bathroom is more complex than a remodel and typically costs 20–30% more due to new utility lines.

Is there a separate permit for just replacing bathroom tile?

Cosmetic tile replacement (removing and re-tiling the same wall or floor without opening the wall or changing waterproofing) typically does not require a permit in Paramount. However, if tile replacement involves opening the wall and you discover that the substrate is wet, moldy, or missing a waterproofing membrane, you are required to bring the wall into code compliance, which means installing a proper waterproofing assembly. Once the wall is opened, a permit is triggered. Most contractors recommend getting a pre-tile inspection estimate from a licensed plumber or general contractor to verify the substrate condition before committing to 'cosmetic-only' work.

What is the cost of a bathroom-remodel permit in Paramount, and what does it cover?

A bathroom-remodel permit in Paramount costs $200–$800 depending on the scope of work. The fee is typically a fixed application fee ($50–$100) plus a construction-cost-based fee (1.5–2% of the declared construction value). For a $20,000 bathroom remodel, expect a permit cost of around $400–$500. The permit covers plan review, all four inspections, and the permit card/approval. It does NOT cover the work itself, contractor labor, or materials. Once the permit is issued, you may begin work; inspections are free with the permit. If you fail an inspection and must correct work, there is no additional permit fee — corrections are covered under the original permit.

What happens if I install a shower without proper waterproofing and Paramount's inspector finds it during the waterproofing inspection?

Paramount's inspector will red-tag the work and issue a Notice to Comply, requiring the improper waterproofing to be removed and replaced with a code-compliant assembly. You must tear out the tile and substrate, install proper cement board or foam board, apply a waterproofing membrane (sheet or liquid), and reinstall tile. This can cost $2,000–$4,000 and delay the project by 2–3 weeks. Once the proper waterproofing is in place, the inspector will approve it, and you can proceed to final inspection. Cutting corners on waterproofing is one of the most expensive mistakes in bathroom remodeling because the fix is destructive and costly.

Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current bathroom remodel (full) permit requirements with the City of Paramount Building Department before starting your project.

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