Does a restaurant remodel need Maricopa County plan approval, and what plumbing goes on the plans?

Maricopa County Environmental Health Code, Chapter VIII, Section II, Regulation 2 ("Plans Submitted") sets the rule. In its words: "No food establishment shall be constructed and no major alteration or addition shall be made thereto until detailed plans and specifications for such construction, alteration or addition have been submitted to and approved by the Department." In this code "Department" means the Maricopa County Environmental Services Department.

Three other parts of the same regulation matter to a plumber:

• Build to the approved set. Any construction, alteration or addition has to follow the plans the Department approved, and the owner, operator or authorized agent must certify in writing that the plan documents comply.
• Approval lapses. Under subsection (b), the approval expires at the end of one year unless the construction, alteration or addition is "substantially under construction by that time."
• Changes go back for review. If the owner makes a material change to the approved plans, revised plans must be submitted and approved before the affected work begins. Structural changes and minor revisions that do not affect health and sanitation are allowed during construction without further approval.

The Plan Review Construction Guide (Rev 09/04/2026) then lists what to submit through the Permit Center. Item c is the plumbing schedule quoted above, and the guide points to its Figure 3 as a sample.

• Plumbing schedule. One of the documents the guide lists for the submittal, with a sample at Figure 3. Reading it as a table or sheet that names each item the guide lists is a reasonable way to prepare it.
• Major alteration or addition. The code text does not define it, so this is a reading: a new build is plainly covered, and the MCEHC fee table separates "Remodel - Major Review" from "Minor Review." Ask the county which one your scope falls under.
• Overhead wastewater lines. Drain or waste piping that runs above the kitchen or other food areas. The schedule has to show them.

Anyone building, remodeling or adding to a food establishment where Maricopa County Environmental Services does plan review. The county's own page for the Environmental Health Code says: "The provisions of this Code are applicable to the unincorporated areas lying within the boundaries of Maricopa County, and the incorporated areas lying within the boundaries of Maricopa County, and the incorporated cities and towns whose governing bodies specifically request the services of the Maricopa County Environmental Services Department." So the code reaches incorporated areas inside the county as well as the unincorporated ones. Your city's own building permit is a separate step.

This does not apply if the project sits in the City of Maricopa or another Pinal County location. Those go to Pinal County Environmental Health, which has its own packet (see the comparison table).

The county's guide also says that "all projects constructed in unincorporated areas of Maricopa County must apply to the Planning and Development Department." The health plan approval does not replace that building permit.

The Chapter I fee rule adds that expedited plan reviews are assessed at two times the flat fee or hourly rate.

A 40-seat cafe in an unincorporated strip center. The designer submits a floor plan, finish schedule, equipment list and a plumbing schedule through the Permit Center. The schedule lists a water heater, the floor sinks under the dish machine and ice machine, the overhead waste lines crossing the kitchen, and the backflow device on the soda system. The reviewer can answer from the schedule without a phone call.

The edge case: a sit-down restaurant adds a patio bar. The owner calls it a small change, but it adds a bar sink and drain lines. If the county treats it as a major addition, the plans need approval before work. If it is a material change to approved plans, revised plans have to go in first. The code gives no dollar line between these, which is why asking first is cheaper than tearing out a drain.

The approval that quietly expires. A tenant gets approval in March, then the lease dispute drags on for more than a year. Reg. 2(b) says the approval expires unless the project is substantially under construction. The plans get resubmitted and reviewed again.

1. 1Create or confirm your Permit Center account. The county says all new permit and plan applications are submitted through the Permit Center.
2. 2Build the plan set from the guide's list: floor plan, finish schedule, plumbing schedule, ceiling and lighting schedules, ventilation plan, site plan, menu and equipment schedule.
3. 3Put on the plumbing schedule the location, size and type of each water heater, the overhead wastewater lines, floor drains and floor sinks, wastewater connections and backflow devices.
4. 4Pay the plan review fee through the Permit Center. The guide recommends applying at least 6 to 8 weeks before construction starts.
5. 5Plan for three inspections, which the guide says are "generally" required: rough plumbing at about 20 percent completion, equipment at 50 to 75 percent, and final at 100 percent. The guide says a potable water supply, a sewage disposal system and permanent power are required for the final inspection.
6. 6If the building uses a well or septic system, the guide says it may need additional permitting from the Water and Waste Management Division, at (602) 506-6666 or (602) 372-1364.

• Myth: The plumber will figure out the drains after approval. The plumbing schedule is a submittal item, and changes that affect health or sanitation have to be approved before the affected work.
• Myth: A health plan approval is a building permit. The guide treats them as separate: unincorporated projects must also apply to Planning and Development.
• Myth: Approval lasts as long as the lease. Reg. 2(b) ends it after one year unless the project is substantially under construction.
• Myth: We can start demo and submit later. The Maricopa County guide says to submit an expedited plan review with its fees if construction began before plan submittal, and that "construction shall not commence unless the required plans have been approved."
• Myth: This guide sizes our grease interceptor. It does not. Interceptor size comes from the local plumbing code and city, covered on the sister page for grease interceptors.