What inspections are required when building a house in Arizona?

Building a house in Arizona requires a series of inspections, each tied to a stage of construction under the International Residential Code (IRC), the model code every Arizona city and county has adopted. The required stages are the footing and foundation inspection before concrete is poured, the rough-in inspections for plumbing, electrical, and mechanical before walls close, the framing inspection, the insulation inspection before drywall, and the final inspection before anyone moves in. The inspections come from IRC Section R109, "Types of inspections." Your city or county inspector has to approve each stage before the next phase covers it up. Skip one and you may have to open finished walls to prove the hidden work meets code.

The required inspection stages, in order

A house is inspected in the order it is built, so each stage signs off on work before the next stage hides it. The IRC sets these stages in Section R109.1, and Arizona cities follow them. Here is the sequence for a typical custom home.

• Footing and foundation (R109.1.1). The inspector checks the foundation before concrete is placed, confirming it "is located as shown on the approved plans" with the right trenches, reinforcing steel, forms, and column pads. This happens after the steel is set but before the pour.
• Rough plumbing, electrical, mechanical, and gas (R109.1.2). These "rough-in" inspections check piping, wiring, ductwork, and gas lines while they are still exposed, "before concealment of systems." Once approved, the trades can be covered.
• Framing (R109.1.4). After the rough-ins pass, the inspector reviews the structural framework, roof, fireblocking, and draftstopping while the framing is still open and accessible.
• Insulation. Before drywall goes up, an inspection confirms the insulation meets the energy code for your climate zone. This is one of the "other inspections" the building department may require under the code.
• Final (R109.1.6). After all work is done, the inspector confirms the home meets fire, life safety, structural, and mechanical rules. No certificate of occupancy is issued without this approval.

Each city can add inspections, such as a separate sewer or stem-wall check, but this backbone is consistent across Arizona.

Some stages have smaller checks inside them. A slab home often gets a separate under-slab plumbing inspection before the concrete is poured. A home with a stem-wall foundation may get a stem-wall check after the footing passes. Stucco and lath get their own look in many cities, since the code calls for a lath and gypsum board inspection before the finish coat goes on. The point of each one is the same. The inspector confirms the work meets code while it is still open to view.

Why each inspection happens before the work is covered

Inspections are timed to catch hidden work before it disappears behind concrete, drywall, or stucco. That timing is the whole point. Once a wall is closed, no one can see whether a wire is spliced correctly or a pipe is properly supported, so the code requires the look while the work is still open.

The IRC is explicit that rough-in inspections for plumbing, mechanical, gas, and electrical must happen "before concealment of systems." The same logic drives the foundation inspection before the pour and the framing inspection before insulation. An inspector who arrives after the drywall is hung cannot verify what is behind it, so they will not approve it. That is how owner-builders and rushed crews end up cutting open finished walls.

For you as the homeowner, this sequence is protection. Each green tag means a trained official confirmed that part of your home meets code before it was sealed up. A house that passes every stage is far less likely to hide a defect that surfaces years later as a leak, a short, or a crack. The inspections are not red tape. They are the record that the bones of your home were done right.

How inspections get scheduled in Arizona cities

You request each inspection from your city or county after that stage of work is ready, usually through an online portal. The builder or owner-builder who holds the permit is responsible for calling for inspections at the right time, and you cannot move forward until each one passes.

In Maricopa County, which covers unincorporated areas like Rio Verde Foothills, you schedule inspections through the county's Permit Center online portal once your permit is "Issued or Reissued." The county says that "once you have a Permit Center account, you can apply for and search for your permits and schedule inspections," and it advises contacting your assigned inspector on the day of the inspection for specifics. Cities like Scottsdale and Phoenix run their own permitting portals where you request inspections the same way. Most jurisdictions ask for the request a business day ahead so an inspector can be routed to your site.

If an inspection fails, the inspector lists what needs to be fixed. You correct it and call for a re-inspection. A failed inspection is normal and fixable. It only becomes costly when work was covered before it was approved, which is why timing each request correctly matters so much.

Plan the calls around your crew, too. A trade like plumbing or electrical needs to finish its rough-in and be ready before you call. If you call too early, the work is not done and the inspector fails the visit. If you call too late, the next trade is stuck waiting. A good builder lines up each inspection so the green tag clears just as the next crew arrives. That keeps the job moving and keeps trades from tripping over each other.

What the final inspection clears, and what comes next

The final inspection is the gate to legally living in your new home, because it leads to the certificate of occupancy (CO). Under IRC R109.1.6, the final inspection happens "after all permitted work completes, before occupancy," and the inspector confirms the whole house meets code. No CO is issued until the final passes.

The certificate of occupancy is the document your city issues to say the home is safe to occupy. Lenders, insurers, and the city all key off it. You usually cannot close a construction loan or get a homeowner policy in force until the CO is in hand, so the final inspection is the last hurdle between a finished house and the keys. In some Arizona cities, a builder can request a temporary certificate of occupancy to move in while a few minor items are finished, often by posting a deposit that is refunded when the punch list is done. The full CO follows once every item clears.

When Jematell Homes builds for you, we schedule and meet every required inspection from footing to final, so the inspections happen on time and in the right order. If you are acting as your own general contractor, build the inspection calendar into your schedule from day one, since a missed footing or rough-in inspection can stall the entire job and force you to expose work you already finished. The rule across Arizona is simple: do not cover any stage until the inspector has approved it.

Building with Jematell Homes

Permitting and code compliance are part of our full-service project management. If you are planning a custom home in Scottsdale, Rio Verde, or the greater Phoenix metro, we are happy to walk through your project.

Sources

• InterNACHI: Understanding the Types of Code Inspections (IRC R109)
• Maricopa County: Residential Construction (inspections)
• Maricopa County: Construction Permit Information
• City of Scottsdale: Plan Review Services