What are the steps to building a custom home in Arizona?

Twelve steps, in a fixed order, take an Arizona custom home from raw lot to move-in day: secure a lot, set a real budget, hire a licensed builder, complete the design and engineering, submit the plans for a building permit, finish the site work, then construct the home through foundation, framing, mechanicals, drywall, and finishes, with city or county inspections at each stage, ending in a certificate of occupancy. The sequence matters: in Arizona you cannot pull a permit without an approved plan set, and you cannot occupy the home until it passes a final inspection. Below is the full numbered sequence, with the Arizona-specific rules that apply at each step.

Steps 1 through 4: lot, budget, builder, and design

The first four steps happen before any permit, and they set up everything that follows. Get these right and the build runs smoothly.

1. Buy or confirm your lot. Check zoning, setbacks, lot coverage limits, and whether the land has water, sewer or septic, and power. A finished subdivision lot in Scottsdale is ready to build. Raw acreage in the Rio Verde Foothills or Cave Creek may need a well, a septic system, and a utility extension, each on its own timeline.
2. Set a budget and arrange financing. Custom builds usually use a construction loan that converts to a mortgage. Your budget needs to cover land, design, permit fees, site work, the house, and a contingency of 10 to 15 percent for surprises like rock or bad soil.
3. Hire a licensed builder. In Arizona, any project that needs a building permit, which a new home always does, must be built by a contractor licensed with the Arizona Registrar of Contractors (ROC). Verify the license is active and in good standing on the ROC website before you sign.
4. Design and engineer the plans. Work with your builder and a designer or architect on the floor plan, elevations, and selections, then have a structural engineer produce a permit-ready plan set with energy calculations. This step takes 2 to 5 months and is where you lock in the choices that drive cost and schedule.

Finalizing your finish selections during step 4, not later, is the single best thing you can do to avoid delays. Change orders during construction are the most common cause of a blown schedule.

Steps 5 and 6: permit and site work

Step five is submitting for a permit, and step six is preparing the land, and both are gated by your city or county. You cannot skip or reorder them.

1. Submit for a building permit. Your builder files the stamped plan set with the local building department. The reviewer checks it against the adopted code. Scottsdale adopted the 2021 International Residential Code, effective January 1, 2023, while Maricopa County uses the 2018 International Residential Code, so the exact requirements vary by jurisdiction. Scottsdale targets about 22 business days for a new-construction first review (7 days administrative plus 15 days substantive). Plan on at least one round of corrections. An Arizona permit application is deemed abandoned 180 days after the last review action, so keep the file moving.
2. Complete site work. Once the permit issues, the crew clears and grades the lot, builds the pad, and runs utilities. In Arizona, timing this around the monsoon (June 15 to September 30) matters, because heavy rain can flood a graded pad or delay the foundation pour. A builder who schedules dirt work and the foundation outside peak storm weeks protects your timeline.

A common Arizona mistake is starting work before the permit issues. Doing work that needs a permit without one can mean stop-work orders, fines, and tear-out, so wait for the green light.

Steps 7 through 12: building the house

The construction steps run in a fixed order because each one depends on the last, and every Arizona jurisdiction requires inspections between phases. Here is the build sequence.

1. Foundation. Footings and the slab go in. The building department inspects the footings and reinforcing steel before the concrete pour, not after.
2. Framing. Walls, floors, and the roof structure go up. This is when the house takes shape and you can walk the rooms.
3. Mechanicals (rough-in). Electricians, plumbers, and HVAC crews run wiring, pipe, and ductwork inside the open walls. The department inspects this rough-in before anything is covered.
4. Insulation and drywall. After the rough-in passes, crews insulate, then hang and finish drywall. In Arizona, proper insulation and a tight envelope matter a lot for cooling costs.
5. Finishes. Cabinets, countertops, flooring, paint, fixtures, trim, and exterior stucco or stone. This is the longest finish stretch and where your selections show up.
6. Final inspection and certificate of occupancy. The department does a final inspection covering life-safety, electrical, plumbing, and mechanical items. When it passes, the city or county issues a certificate of occupancy, and you can move in.

Each inspection has to pass before the next phase starts, so a failed inspection stalls the trades waiting behind it. A builder who schedules inspections tightly and clears any correction the same week keeps the sequence on track. We manage that inspection chain for you and keep you updated at each milestone, so the only surprise at the end is how fast the last month went.

The Arizona rules that gate the whole sequence

A few Arizona rules sit underneath every step and decide whether you can move from one to the next. Knowing them early keeps your project legal and on schedule.

The first is licensing. Arizona law requires a contractor license for essentially all home construction. The handyman exemption in A.R.S. 32-1121 only covers small jobs, and it states that the exemption does not apply "in any case in which the performance of the work requires a local building permit." A new home always requires a permit, so it always requires a licensed contractor. Always confirm a builder's license is active on the ROC website before you sign a contract, and check that the license classification covers residential construction.

The second is the permit gate. You cannot legally start construction that needs a permit until the permit issues. Site grading, foundations, and framing all need an approved permit first. Starting early to "save time" can trigger a stop-work order, fines, and tear-out that cost you far more time than you saved.

The third is the inspection gate. The adopted residential code, the International Residential Code in both Scottsdale and Maricopa County, requires the building department to inspect specific stages: footings before the pour, plumbing and electrical rough-in before cover, framing, and a final inspection before occupancy. You cannot legally move in until that final inspection passes and the jurisdiction issues the certificate of occupancy.

The fourth is your own decisions. Every selection you delay becomes a change order later, and change orders cost money and time. The owners who finish on schedule lock their floor plan and finishes during design, then resist mid-build changes unless something truly needs to move. Treat steps 1 through 4 as the place to make decisions, and let steps 5 through 12 be execution. Build the right order into your plan from the start, and the rest of the project follows it cleanly.

How Jematell Homes helps

We are a licensed, family-owned Arizona custom home builder. We would rather answer your questions before you build than after, so get in touch any time.

Sources

• Arizona Registrar of Contractors: Before You Hire a Contractor
• A.R.S. 32-1121 (Persons not required to be licensed)
• City of Scottsdale: Plan Review Services (review timeframes)
• Maricopa County: Residential Construction (permits and inspections)
• City of Scottsdale: Building Code Information (adopted codes)