Quick answer
Mesa says you do not need a permit if your new air conditioner uses the same or less electricity than the old one, but changing the electrical connections requires a construction permit. SRP supplies about 90% of Mesa residents. The rest, mainly downtown and historic districts, buy power from the City of Mesa's own electric utility, which runs different programs.
Updated · By the AC Phoenix Pros editorial team · How we research
We are an independent guide, not a contractor. We do not repair or install equipment. We explain local rules and costs, and when you email us a request we reply with next steps and, where a vetted licensed contractor is available, an introduction.
When does a Mesa AC replacement need a permit?
Mesa's residential construction FAQ sets a simple test: "You don't need a permit if your new air conditioning unit uses the same or less electricity as the old one." The exception is electrical work: "If you're changing the electrical connections, you will need a construction permit." In practice that means:
- Same-size or more efficient swap on the existing circuit: no permit under the city FAQ.
- Larger unit, new breaker, new disconnect or rewired circuit: construction permit needed.
- Emergency repairs that do need a permit: must be submitted by the next business day.
Ask your contractor to compare the electrical ratings on the old and new equipment in writing, so you know which side of the rule you are on. Mesa Permit Services takes questions at 480-644-4273.
SRP or Mesa Electric: which programs apply to you?
The city states that "Salt River Project (SRP) supplies electric service to about 90% of Mesa residents" (City of Mesa Savings and Rebates). Mesa Electric, a city utility formed in 1917, serves the central downtown and historic districts and has about 18,101 electric customers (American Public Power Association).
| If your bill comes from | Program | What you get |
|---|---|---|
| SRP | Cool Cash rebate | $75 to $225 per ton for 15.2 SEER2 or better systems, up to $1,125, installed before April 30, 2027 |
| SRP | Duct test and repair rebate | 75% of costs, up to $400 for a single-family detached home, via a BPI-certified participating contractor |
| City of Mesa | Electric Smart Peaks | $100 in gift cards the first year ($50 to enroll, $50 after summer), then $50 per year |
| Either, if income-eligible | Efficiency Arizona | Up to $8,000 for a heat pump, up to $14,000 per household |
Smart Peaks events run May 1 to September 30, last no more than four hours, typically fall between noon and 9 p.m., and can be overridden from your thermostat. You need an internet-connected thermostat that controls central AC. SRP customers are directed to SRP's own programs instead.
How old are Mesa homes?
According to 2019 to 2023 Census survey data compiled by Point2Homes, Mesa's median construction year is 1989. About 19% of units were built in the 1970s and 24% in the 1980s, and roughly 64% of occupied homes are owner-occupied. Many 1970s and 1980s homes have had several outdoor units, but the air handler, ducts and refrigerant lines may be original. ENERGY STAR suggests considering replacement when a heat pump or air conditioner is more than 10 years old (ENERGY STAR), which describes a large share of Mesa systems.
Repair help for Mesa homeowners
Mesa's Emergency Rehabilitation Program covers habitability repairs, including AC and heater repair or replacement, with a maximum grant of $30,000 per household per year. As of this writing the city says the program is "currently on hold and not accepting new applications," with an interest form for future rounds. Income limits follow HUD figures by household size, and you must have owned and lived in the home for at least 12 months.
Checking a contractor before work starts in Mesa
Look up the company in the Arizona ROC contractor search and confirm it holds a classification that covers air conditioning, such as R-39 or CR-39. The ROC also advises against letting payments get ahead of the work and against paying cash (ROC hiring tips). For a price check on the quote, see the Phoenix AC repair cost guide and our HVAC repair overview.
Sending a request from Mesa
Email dispatch@acphoenixpros.com with your ZIP code, whether you are an SRP or Mesa Electric customer, the age and type of your system, and what it is doing. The contact page lists what to include. We are not an emergency service. More city guides are on the locations page, and the AC repair guide covers common faults.
Frequently asked questions
How do I know if I am a Mesa Electric or SRP customer?
Look at the name on your electric bill. Mesa Electric serves the central downtown and historic districts, while SRP serves about 90% of Mesa residents. Service territory is fixed by address, so you cannot switch providers. Programs such as Smart Peaks and Summer Electric Assistance are only for City of Mesa electric customers.
What is Mesa's Summer Electric Assistance program?
It is a City of Mesa program for income-qualified customers of Mesa's electric utility. It waives the monthly service charge and the usage charge for the first 80 kWh in July, August and September, worth about $23.50 a month. For 2026 the city accepted applications from April 1 to August 1.
Does a bigger AC need a permit in Mesa?
Very likely. Mesa's no-permit rule applies only when the new unit uses the same or less electricity than the old one. A larger unit usually draws more power and often needs a new breaker or wiring, and the city says changing electrical connections requires a construction permit.
Sources
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