Research by DoINeedAPermit Research Team · Updated May 2026
The Short Answer
A full kitchen remodel in Katy requires a building permit if you're moving walls, relocating plumbing, adding electrical circuits, modifying gas lines, venting a range hood to the exterior, or changing window/door openings. Cosmetic-only work (cabinet swap, countertops, paint, appliance replacement on existing circuits) is exempt.
Katy enforces the 2015 International Building Code (IBC) and International Residential Code (IRC) with Texas-specific amendments, and the city's permit portal is online-first — you can file electronically through the Katy system, which speeds initial intake but means the city expects full, dimensioned plans (not sketches) from day one. Unlike some Houston-area cities that batch-issue kitchen permits in 3 days, Katy's Building Department runs a formal 15–21 day plan-review cycle for anything involving structural, plumbing, or electrical changes; if your plans are incomplete (missing load-bearing wall calculations, GFCI outlet spacing, range-hood duct termination detail, or trap-arm venting), you'll get a Request for Information (RFI) that adds another 7–10 days. Katy is in flood zone consideration for parts of the city (Brays Bayou corridor), so some addresses trigger additional floodplain or drainage-easement questions — verify your address on the city's floodplain map first. The city requires three separate sub-permits for most full remodels: building, plumbing, and electrical (mechanical for range hoods over 400 CFM). Owner-builders can pull permits on owner-occupied homes, but the city enforces strict inspection scheduling (rough plumbing, rough electrical, framing, drywall, final) and requires the owner to be on-site or sign off in writing for each inspection.

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

Katy full kitchen remodel permits — the key details

Katy requires a building permit whenever you alter the kitchen in ways that touch structure, mechanical systems, or code-regulated safety features. The trigger list is straightforward: moving or removing any wall (even non-load-bearing), relocating a sink or dishwasher (plumbing relocation), adding a new electrical circuit or GFCI outlet, modifying gas lines to a cooktop or oven, venting a range hood through an exterior wall (which requires wall penetration and duct detail), or changing a window or door opening. If your remodel is strictly cosmetic — new cabinets in the same footprint, granite countertops, paint, appliance swap on existing circuits — you're exempt. But the moment you touch the bones, you need permits. Katy's Building Department processes applications through its online portal (www.katytx.us/government/departments/building-services), and you must submit dimensioned floor plans, electrical load calculations, plumbing riser diagrams, and (if applicable) a structural engineer's letter for load-bearing wall removal. The city uses AutoCAD-compatible PDF submissions and typically completes intake within 2 business days; plan review follows the 2015 IRC and Texas Building Code, which are more conservative on electrical spacing and gas-appliance clearances than many homeowners expect.

The most common rejection point for Katy kitchen permits is incomplete electrical drawings. IRC E3702 and the National Electrical Code (NEC 210.52) require two separate small-appliance branch circuits (20-amp, dedicated) in the kitchen — one for the counter outlets, one for the refrigerator or island (if applicable). Many homeowners assume they can run new outlets off an existing 15-amp general-purpose circuit; the city will reject that plan and issue an RFI. GFCI protection is mandatory on all countertop receptacles within 6 feet of the sink, and Katy inspectors are strict about spacing — no more than 48 inches between outlets, measured along the countertop. If your remodel includes an island or peninsula, every countertop outlet (even a single island outlet) must be GFCI-protected and counted toward the 48-inch spacing rule. The range hood is another common snag: if you're installing a new range hood and venting it to the exterior (not recirculating), you must show the duct routing, termination point (typically a wall cap on the exterior), and CFM rating on your electrical plan. If the hood is 400 CFM or larger, the city may require a separate mechanical permit and demand that the duct be sized per Manual J or an equivalent friction-loss calculation. Katy does not allow ductless (recirculating) range hoods to satisfy the ventilation code — the hood must exhaust to the outside.

Plumbing relocation is the second-most-rejected category. If you're moving the sink, dishwasher, or any fixture, you must show the new water-supply and drain-vent routing on a plumbing riser diagram. IRC P2722 governs kitchen-sink drains, and Katy enforces strict trap-arm slopes: the drain arm from the sink trap to the main stack must slope at 1/4 inch per foot (downhill toward the stack), and the vent arm must slope upward at 1/8 inch per foot. If you're working with an older house with a 2-inch main or cast-iron drains, the inspection can get complicated; the city may require a backflow prevention device or a separate pump discharge line if the new fixture is below the main vent line. Many homeowners try to tie a new kitchen drain into a bathroom vent or an undersized branch line — the city will reject that. You need a licensed plumber to draw this correctly, and Katy's plumbing inspector will verify trap depth, vent routing, and cleanout placement during the rough-plumbing inspection (the second inspection in sequence, after framing). Do not cover any drains or vents until the inspector signs off.

Gas-line modifications require a separate mechanical or plumbing permit in Katy (depending on whether it's a new appliance branch or a modification to the main line). IRC G2406 governs gas appliance connections, and Katy enforces a 6-foot maximum run for flexible gas connector; any longer run must use hard copper or CSST (Corrugated Stainless Steel Tubing) with a service shut-off valve within 6 feet of the appliance. If your kitchen remodel includes a new gas cooktop or wall oven, and the existing gas line doesn't reach, you'll need to extend the line in rigid copper (preferred by most inspectors) or CSST. Many DIY attempts fail because homeowners undersized the line or forgot the shut-off valve; Katy's inspector will catch this during rough-inspection and issue a deficiency notice. The city also requires a pressure test and purge of the line before final approval. If you're unsure whether your home's existing gas infrastructure can support a new cooktop in a different location, hire a licensed mechanical contractor or plumber to evaluate before you submit plans; a retroactive design change will add 2–3 weeks to your timeline.

Load-bearing wall removal is the wild card. If your remodel involves removing any wall — even a partial removal or an opening — you must determine whether it's load-bearing. Katy requires a structural engineer's letter or a detailed framing plan (signed by a licensed design professional in Texas) that specifies the beam size, support points, and attachment details. The city will not accept a builder's assumption or a photocopy of a standard beam table; you need actual calcs. If you're removing a load-bearing wall that supports a second story or the roof, you'll need a structural engineer to design a new beam (typically steel or engineered lumber), and that design must be submitted with your building permit. The structural inspection happens after the wall is removed and the beam is installed (before drywall), and the city inspector will verify that the beam is supported on adequate posts, that posts are set on footings (not just on the subfloor), and that connections are bolted per the engineer's detail. This step alone can add $2,000–$5,000 to the project cost and 2–3 weeks to the timeline. Never remove a wall first and design the beam later; Katy will issue a stop-work order and you'll be forced to shore it back up temporarily while you hire an engineer.

Three Katy kitchen remodel (full) scenarios

Scenario A
Same-footprint kitchen remodel, new cabinets and countertops, 2 new GFCI outlets on existing 20-amp circuit, Katy central (non-floodplain)
You're replacing your cabinets, adding quartz countertops, and running two new outlet boxes on the existing kitchen circuit for a coffee maker and phone charger. Because you're not relocating any fixtures, adding a new circuit, or modifying plumbing or gas, Katy classifies this as cosmetic and exempt from permitting. However — and this is crucial — if the new outlets are within 6 feet of the sink, they must be GFCI-protected; if you're doing this yourself, buy GFCI outlets and swap them in place of the old ones (no permit needed for outlet replacement). If the new outlets are farther than 6 feet from the sink and on an existing general-purpose circuit, you're fine. The only watch-out: if the existing circuit is already serving multiple loads (refrigerator, garbage disposal, etc.), Katy's inspector might flag a future kitchen permit if you ever add another circuit or fixture, because the electrical panel will be deemed overloaded. This is a pre-emptive issue — document what's currently on that circuit so you know what headroom you have. Total cost: $0 in permit fees, but hire a licensed electrician to run the new outlet boxes ($400–$600). Timeline: Same day, no inspection.
No permit required (cosmetic only) | GFCI outlets required within 6 ft of sink | Electrician labor only $400–$600 | No building permit fees
Scenario B
Kitchen sink relocation 4 feet to the left (island), new GE Cafe gas cooktop at existing location, range hood vented to exterior wall, downtown Katy subdivision (older home, 1975)
You're relocating the sink to a new island and installing a new gas cooktop at the old sink location with a new range hood. This triggers three permits: building (for structural if the island has a support column below), plumbing (for the sink relocation and new drain/vent routing), and mechanical or plumbing (for the gas line extension). Katy's plumbing inspector will want a riser diagram showing the sink trap slope (1/4 inch per foot downhill), the vent routing (1/8 inch per foot uphill to the main vent stack or a new secondary vent through the roof), and the drain arm diameter (2 inches for a kitchen sink, minimum). If your home was built in 1975, the main drain stack is likely cast iron or galvanized steel; the city will inspect the junction between the new PVC drain arm and the old stack to ensure a proper coupling and no sharp bends. The gas line requires a shut-off valve within 6 feet of the cooktop and a pressure test. The range hood duct (typically 6 inches rigid aluminum) must exit through the exterior wall with a damper-equipped wall cap; the city inspector will verify the duct is not pinched or undersized, and that the hood CFM rating matches the duct diameter (a 400+ CFM hood needs a 7-inch or 8-inch duct, not a 6-inch). Lead-paint testing is required in Katy for pre-1978 homes if any interior dust is disturbed; you'll need an XRF or a certified lab test before drywall is removed. The plumbing rough-in inspection and electrical rough-in inspection happen on separate days; framing inspection comes next (if you're moving any studs around the island), then drywall, then final. Plan 4–6 weeks from permit submittal to final sign-off. Valuation estimate: $15,000–$25,000 (island cabinet, cooktop, hood, plumbing and gas labor). Permit fees: $400–$900 (building), $200–$400 (plumbing), $150–$300 (electrical for new hood circuit), plus a mechanical or gas permit if required ($100–$200).
Building permit required | Plumbing permit required (sink relocation) | Electrical permit required (range hood circuit) | Gas/mechanical permit required (cooktop line) | 4–6 weeks plan review + inspections | Lead-paint disclosure (pre-1978) | Total permits $850–$1,800 | Project cost est. $15,000–$25,000
Scenario C
Load-bearing wall removal (wall between kitchen and dining room), install steel beam, new island with cooktop and plumbing, new electrical panel circuits, west Katy (flood-zone fringe, clay soil)
You're opening up your kitchen to the dining room by removing a load-bearing wall and installing a steel beam, plus adding a 4-foot island with a gas cooktop and sink, new under-cabinet lighting (new circuit), and a new range hood. This is a major structural project and requires a structural engineer's letter (Texas PE stamp), building permit, plumbing permit, electrical permit, and mechanical permit. The engineer will specify a beam size (typically a steel I-beam or engineered microlam), support posts, and foundation pads; because Katy is in a clay-heavy area (Houston Black clay), the engineer will also consider soil bearing capacity and frost depth (6–18 inches in central Katy, up to 24 inches toward the west). The foundation pads must extend below frost depth to prevent heave. The engineer's calcs and the structural detail (showing beam size, post locations, bolted connections, and pad size) are submitted with the building permit; the structural inspection happens after the beam is installed, before drywall. Katy's Building Department will also flag the flood-zone fringe and may require you to verify your property's elevation relative to the 100-year floodplain; if your kitchen is within the flood zone, you'll need floodplain-compatible materials (no carpet in floor, treated lumber, elevated electrical outlets). The plumbing for the island sink requires a new drain line to the main stack and a new vent (either a secondary vent through the roof or an air-admittance valve, depending on distance from the main stack and Katy's inspector's preference). The gas cooktop line requires a new branch from the main gas line with a shut-off valve. The new under-cabinet lighting (and range hood) require a dedicated 20-amp circuit, not a tap off an existing general-purpose circuit. Plan 6–8 weeks from engineering consultation to final sign-off. Valuation estimate: $40,000–$60,000 (beam, installation, island, cooktop, plumbing, electrical, drywall). Permit fees: $800–$1,500 (building, scaled to valuation), $300–$500 (plumbing), $200–$400 (electrical), $150–$250 (mechanical for gas), plus engineer's fee ($1,500–$3,000). Total permitting and engineering cost: $3,150–$6,150.
Structural engineer required ($1,500–$3,000) | Building permit required | Plumbing permit required | Electrical permit required | Mechanical/gas permit required | Floodplain verification may apply | 6–8 weeks timeline | Total permits $1,450–$2,650 | Engineer + permits $3,150–$6,150 | Project cost est. $40,000–$60,000

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Katy's plan-review process and the RFI (Request for Information)

Katy's Building Department uses an online portal (accessible via the city website) to manage kitchen permits. When you submit your application, you upload PDF floor plans, electrical single-line diagrams, plumbing riser diagrams, and any structural or mechanical details. The intake team reviews for completeness within 1–2 business days; if anything is missing (like a second small-appliance circuit on the electrical plan, or a load-bearing wall calculation), they'll issue an RFI via email asking you to resubmit. This is not a rejection — it's a formal request for clarification. You have 14 days to respond; if you don't, the permit application expires and you have to start over.

The plan review itself takes 15–21 days for a full kitchen remodel. The Katy Building Department has dedicated plan reviewers for electrical, plumbing, and structural; each reviewer marks up the plans independently and compiles a single RFI if issues are found. Common RFI points for kitchen permits include: (1) missing GFCI outlet spacing diagram on electrical plans, (2) load-bearing wall removal without engineer's letter, (3) range-hood duct termination detail not shown, (4) plumbing vent routing that violates slope requirements, (5) gas line size undersized for the appliance load, and (6) floodplain verification missing if your address is near a bayou or drainage easement. Each RFI cycle adds 7–10 days; if you're thorough the first time, you avoid this delay.

Once plans are approved, Katy issues a permit (printed or digital) and you can begin work. The city schedules inspections as the work progresses: first rough framing (if walls are moved), then rough plumbing, then rough electrical, then drywall (if applicable), then final. Each inspection must be requested 24 hours in advance via the portal or by phone (Katy Building Department main number). Inspectors typically arrive within 2–3 business days of your request. The city charges no per-inspection fee; the permit fee covers all inspections.

Katy's electrical code nuances and the double-circuit rule

Katy enforces NEC 2020 (National Electrical Code) as adopted by Texas, with no local amendments that differ from the state baseline. However, the city's electrical plan reviewers are meticulous about kitchen circuits, and homeowners often misunderstand the 'two small-appliance branch circuits' rule. IRC E3702 and NEC 210.52(B) require a minimum of two separate 20-amp circuits dedicated to countertop receptacles (not shared with other loads like the refrigerator or garbage disposal). Many remodelers assume they can run both the counter outlets and the refrigerator on one 20-amp circuit; Katy will reject that. The two circuits must be clearly labeled on the electrical plan, each with its own breaker, and routed to separate countertop zones.

A second nuance: island and peninsula outlets. If your remodel includes an island or peninsula, NEC 210.52(C) requires that each countertop space be within 48 inches (measured along the countertop, not in straight-line distance) of a receptacle. This means a 3-foot island cannot have just one outlet in the center; it needs at least two, spaced to satisfy the 48-inch rule. All island outlets must be on one of the two dedicated small-appliance circuits and must be GFCI-protected. Katy inspectors verify this during rough-electrical inspection, and if you've underestimated the outlet count, you'll get a deficiency notice and have to add outlets before drywall.

Under-cabinet lighting is a third consideration. If you're adding LED strips or puck lights, they're typically low-voltage (12V or 24V) and require a transformer; low-voltage circuits are exempt from the two-circuit rule and can share a general-purpose circuit. However, if your under-cabinet lights are 120V (hardwired), they must be on a dedicated circuit (preferably one of the two small-appliance circuits). Katy's electrical reviewer will ask for clarity on this; make sure your electrician labels the diagram 'LED puck lights, 12V transformer (exempted)' or '120V under-cabinet hardwired (dedicated 20A circuit).' Ambiguity will trigger an RFI.

City of Katy Building Services
Katy City Hall, 901 Ave C, Katy, TX 77493
Phone: (281) 391-4800 (main); Building Services extension (verify with city) | https://www.katytx.us/government/departments/building-services (online permit portal linked via this page)
Monday–Friday, 8:00 AM–5:00 PM CT

Common questions

Do I need a permit to replace my kitchen cabinets and countertops?

No, if the cabinets and countertops are installed in the same footprint and do not affect plumbing, electrical, or structural elements. This is cosmetic work. However, if you're moving the sink, adding new electrical outlets, or relocating any fixture, a permit is required. Verify with Katy Building Services before you start work if you're unsure whether your specific scope is cosmetic.

What if I'm just adding a new range hood with exterior ventilation?

If the range hood is replacing an existing hood in the same location and the electrical outlet already exists, no permit is required (replacement-in-kind). If you're adding a new hood, venting it to the exterior (cutting a hole in the wall), and using a new electrical circuit, a building and electrical permit are required. A mechanical permit may also be needed if the hood is 400+ CFM and requires duct sizing.

Does Katy require a structural engineer's letter to remove a wall?

Yes, if the wall is load-bearing (supports a floor, roof, or second story). A Texas-licensed PE (Professional Engineer) must calculate the required beam size, post locations, and foundation pads. The engineer's letter and structural detail are required with the building permit application. Non-load-bearing walls do not require engineering, but Katy will ask you to confirm this on the permit form; when in doubt, hire an engineer to evaluate.

What are the most common reasons Katy rejects kitchen permit applications?

Missing the second small-appliance circuit on the electrical plan, incomplete GFCI outlet spacing diagram, range-hood duct termination detail not shown, plumbing vent slope violations, gas line undersized or missing shut-off valve, and load-bearing wall removal without engineer's letter. Submit detailed, dimensioned plans the first time and you'll avoid RFI delays.

How long does it take to get a kitchen permit in Katy?

Plan-review typically takes 15–21 days from initial submission. If your plans are complete, intake is 1–2 days, then review is 2–3 weeks. If you get an RFI, add 7–10 days per cycle. From permit issuance to final inspection, expect 3–8 weeks depending on the scope (cosmetic remodels can be done in 2–3 weeks; structural changes can take 2 months).

Do I need a license to pull a kitchen permit as the owner?

Katy allows owner-builders to pull permits on owner-occupied homes. However, electrical and plumbing work typically must be performed by a licensed contractor in Katy; you cannot do electrical or plumbing yourself even if you pull the permit. Carpentry (framing, drywall, finishing) can be owner-performed. Verify current regulations with Katy Building Services before starting work.

Is there a lead-paint hazard disclosure required for my 1970s kitchen remodel?

Yes. Texas and federal law require disclosure of lead-paint hazards in homes built before 1978. If your remodel disturbs interior paint or drywall (which it will), you must obtain an XRF (X-ray fluorescence) test or hire a certified lead assessor before work begins. The results must be disclosed to any future buyers. Katy inspectors will ask to see this documentation during permitting.

What if my kitchen is in a floodplain or flood-zone fringe?

Katy's Building Department will flag your address if it's in a regulated floodplain (within the 100-year flood elevation per FEMA maps). If your kitchen is in the flood zone, you must use flood-resistant materials (no carpet in floor, treated lumber for lower cabinets, elevated electrical outlets if required by local elevation), and the inspector may require an elevation certificate. Check the city's floodplain map online before you start design; if you're in the fringe, add 1–2 weeks to your permitting timeline.

Can I use a recirculating (ductless) range hood instead of venting to the exterior?

No. Katy and the 2015 IRC require range hoods to exhaust to the exterior (outside air). Recirculating hoods are not permitted for kitchens. You must vent through an exterior wall or roof with a damper-equipped cap. Plan for wall penetration and ducting in your remodel budget.

What happens if I do kitchen work without a permit and then want to sell my house?

Texas requires sellers to disclose unpermitted work via the TREC (Texas Real Estate Commission) Addendum. Buyers and their lenders will often demand that you obtain retroactive permits, remove the work, or offer a credit/escrow to cover future remediation. Unpermitted kitchen work can kill a sale or reduce the purchase price by $10,000–$50,000+. Get the permit upfront; it's far cheaper.

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

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