Restaurant Build-Out Basics: Kitchen Rough-In, Hoods, Grease, and Health Code

A restaurant build-out is one of the most demanding types of small commercial construction, because you’re combining a public dining space with an industrial kitchen — and each side carries its own code, mechanical, and inspection requirements. This restaurant buildout Arizona overview explains the core systems that make commercial kitchen construction different from a standard office or retail space: kitchen rough-in, exhaust hoods, grease management, and health-code planning. It’s a general primer to help Phoenix-area operators plan smarter, not a substitute for design professionals or the authorities who ultimately approve the work.

Why restaurants are a different animal

Most tenant improvements deal with walls, power, and finishes. Restaurants add heat, grease, water, waste, ventilation, and food safety — all regulated, all inspected, and all interdependent. A layout that looks fine on paper can fail if the exhaust, gas, plumbing, and electrical loads aren’t coordinated from the start. Because so many trades and agencies are involved, restaurant build-outs reward early planning and punish improvisation.

If you’re leasing a space, the ideal scenario is a second-generation restaurant space where a prior food operation left usable infrastructure — a hood, grease interceptor, and floor drains. Converting a former retail or office unit into a first-time restaurant is entirely possible, but it means building the kitchen infrastructure from scratch, which is a larger scope. Our broader tenant improvement guide for Phoenix businesses covers that first- vs. second-generation distinction in more detail.

Kitchen rough-in: getting the bones right

“Rough-in” refers to the behind-the-walls and under-the-floor systems installed before finishes go in. In a commercial kitchen, this is where the project succeeds or fails.

• Plumbing rough-in — supply lines and drains for sinks, dishwashers, prep stations, and floor drains or trench drains. Commercial kitchens commonly need multiple sink types (prep, hand-wash, three-compartment ware-washing, and a mop sink), and health regulations dictate where they go.
• Gas — sizing and routing gas lines for ranges, ovens, fryers, and grills, with proper shutoffs. Gas work is closely inspected.
• Electrical — dedicated circuits for refrigeration, cooking equipment, and dish machines, plus the higher loads a kitchen demands compared to a retail space.
• Floor and wall assemblies — commercial kitchens typically require cleanable, durable surfaces and properly sloped floors that drain.

Because equipment placement drives every rough-in location, you need a near-final kitchen equipment plan before rough-in begins. Moving a fryer after the gas and floor drain are set is expensive.

Exhaust hoods and make-up air

Any cooking that produces grease-laden vapor — frying, grilling, sautéing — generally requires a commercial exhaust hood (Type I) over the cooking line. The hood captures smoke and grease and exhausts it outside through a dedicated duct, usually up through the roof.

The part operators underestimate is make-up air. When a hood pulls large volumes of air out of the building, that air has to be replaced, or the kitchen goes into negative pressure — doors get hard to open, pilot lights struggle, and the hood underperforms. A balanced system supplies tempered make-up air to match what the hood exhausts. Hood and make-up air design is specialized mechanical work and is inspected as part of the build.

Fire protection ties in here too: cooking hoods over grease-producing equipment typically require an integrated fire-suppression system, coordinated with the building’s fire protection and often reviewed by the fire authority. These systems are life-safety items and are not optional.

Grease management

Grease is a plumbing and environmental issue, not just a cleaning one. Restaurants generally must capture fats, oils, and grease before they enter the sewer, using a grease interceptor or grease trap sized for the operation. Requirements — the size, type, and location — are commonly set by the local wastewater or plumbing authority and vary by jurisdiction across the Valley, so this is an early conversation to have with your design team and the city.

Getting grease management wrong can stall a project late, when it’s hardest to fix. Confirm the requirement, sizing, and placement during design, not after the slab is poured.

Health code and the plan-review path

Food establishments in Arizona are regulated for public health, and in the Phoenix metro that oversight commonly runs through Maricopa County’s environmental health program in addition to the city building department. Many jurisdictions require a plan review of the kitchen layout — covering finishes, equipment, sinks, hand-washing, refrigeration, and food-flow — before construction and again as an inspection before opening.

Requirements are detailed and specific, and they change, so treat the following as general categories to plan around rather than a checklist:

• Cleanable, non-absorbent surfaces for floors, walls, and ceilings in food areas.
• Adequate hand-washing sinks located where staff need them.
• Proper separation of food prep, ware-washing, and storage.
• Refrigeration and hot-holding capacity appropriate to the menu.
• Restroom access that meets building and accessibility codes.

Accessibility applies to the public-facing side as well — entrances, the dining room, and restrooms typically must meet accessibility standards. Our commercial ADA compliance basics guide is a useful general starting point. Always confirm current health and accessibility requirements with the authorities having jurisdiction.

Permits, inspections, and timeline

A restaurant build-out usually pulls multiple permits — building, mechanical, plumbing, electrical, and often fire — plus the health plan review. That means multiple inspection tracks running through the project. Our overview of what to expect during construction inspections explains how those stages fit together, and our guide to submitting building permits in the Phoenix metro covers the submittal path.

Timeline drivers to plan around include design and health plan review cycles, long-lead kitchen equipment, custom hoods, and electrical gear. Restaurants reward operators who order equipment and start reviews early, because those items — not the framing — usually set the critical path.

How Desert Wolf Developers helps

Desert Wolf Developers is a family-run, licensed Arizona general contractor holding an active KB-2 dual license (ROC #364568) for residential and small commercial work. We build and remodel small commercial spaces — including restaurant and food-service tenant improvements — across the Phoenix metro and West Valley, coordinating the trades and inspections that make a kitchen come together. We work alongside your design and equipment professionals to keep rough-in, hoods, grease, and health-code requirements aligned from day one.

Explore our commercial construction services, submit your project to start scoping, or contact us at (602) 386-6623.

This article is general information, not code, health, or legal advice. Health-code, plumbing, mechanical, fire, and accessibility requirements vary by jurisdiction and change over time — always confirm current requirements with your city, Maricopa County environmental health, and qualified design professionals before beginning work.