Data center approvals in City of Mesa, AZ

Updated October 2026

Most sites need a rezoning: a legislative decision with two public hearings and the longest, least predictable clock in the chain. Hearings: Planning and Zoning Board → City Council.

What the timeline looks like

working days (Mesa works Mon–Thu); discretionaryApproval is an estimate from the 2026 P&Z calendar (about 21 weeks deadline-to-hearing) plus Council introduction and adoption, below the published 164-working-day maximum; sitePlan is the published P&Z site plan frame; gradingPermit is civil/engineering plan review (40) plus grading permit issuance (15), matching the module classes; buildingPermit assumes two 18-working-day review cycles plus resubmittal

What slows projects here

• Most sites need a rezoning: a legislative decision with two public hearings and the longest, least predictable clock in the chain.
• Ordinance No. 5957 (adopted July 8, 2025, effective August 8, 2025) defines 'Data Center' and allows it as a principal use only in the General Industrial (GI) and Heavy Industrial (HI) districts and only when the City Council specifically authorizes the use at approval of a Planned Area Development (PAD) overlay (Table 11-7-2 'SE(18)'); it is prohibited by right in PEP, LI, GI and HI, which ended the administrative path under the Elliot Road Technology Corridor LI PAD overlay. Accessory data centers stay permitted in commercial and employment districts under Section 11-31-36(C)(2). Owners who held PEP/LI/GI/HI/DB-2 land (or Eastmark Village/District/Regional Center/Urban Core land) on August 8, 2025 may demand a Prop 207 waiver of the 'Data Center Law' until August 8, 2028 (Ordinance § 12; A.R.S. § 12-1134); the waiver restores the pre-ordinance path on that parcel but not relief from the 11-31-36 standards and terminates on a rezoning. Eastmark (Mesa Proving Grounds) is exempt from 11-31-36 under its Community Plan (Ordinance § 14). Approvals and complete applications filed before August 8, 2025 are grandfathered (§ 15). Ordinance § 10 sets the effective date at thirty days after adoption; the city's waiver form fixes the Effective Date as August 8, 2025 (ordinance and form re-read 2026-10-31).
• Notice rules are a veto point: statutory floor (A.R.S. § 9-462.04, read 2026-10-31): newspaper publication at least 15 days before the hearing; posting on the property and in ten public places only where no newspaper of general circulation exists ((A)(1)); first-class mail to owners within 300 feet for rezonings not initiated by the property owner ((A)(3)); compensated-testimony disclosure (D). Mesa's own mailing radius, sign posting and citizen participation plan / neighborhood meeting requirements for owner-initiated cases are in Zoning Ordinance Chapter 67 (not retrievable in this pass; confirm at onboarding) and are documented in the staff report (A.R.S. § 9-462.04(A), (D), (H), (K); Mesa Zoning Ordinance § 11-67-4(E)). A defective notice can void an approval after the fact.
• Ordinance 5957 adopted 5-0 on July 8, 2025 after a 6-0 P&Z recommendation on June 25, 2025; staff cited 15 data centers built, approved or proposed on about 1,500 acres over six years and more than 175 resident comments in support of restrictions (Mesa Tribune / Mesa Independent, as reported)
• NTT Elliot Road campus (up to seven buildings, ~2.26M SF) filed its complete application August 4, 2025, four days before the ordinance took effect, and was grandfathered under the prior rules; P&Z recommended approval May 13, 2026 (as reported)
• EdgeCore Elliot Road / Everton Terrace: P&Z approved a site plan modification January 24; revised two-building plan (~1.2M SF) approved March 2026 after a scaled-back resubmittal (as reported)

What to do about it

• Run the utility large-load study, the state air permit and the land-use approval in parallel from day one; they are separate authorities and nothing requires them in sequence.
• Lock the generator count, size, tier and classification before filing: a density change reopens the air permit, the noise study and the utility load letter together.
• Treat every statutory notice as a checklist with evidence (advertisement text and dates, mailing receipts, posted signs) reviewed by counsel against the statute in force on the hearing date.
• Carry the 30-day appeal window after the approval on the schedule; lenders and tenants will not close across it.
• File complete so the 164-day review clock starts; most delay in review is correction cycles, not review time.

Sources

• City of Mesa Ordinance No. 5957 (data centers; PAD overlay) — accessed 2026-10-31
• City of Mesa — Data Center Law Waiver form — accessed 2026-10-31
• City of Mesa — Application Types Process Time Frames (A.R.S. § 9-835) — accessed 2026-10-31
• City of Mesa — Planning and Zoning Board (schedule, 2026 calendar) — accessed 2026-10-31
• City of Mesa — Legal Protest — accessed 2026-10-31
• City of Mesa — Commercial Construction (plan review timeline, adopted codes) — accessed 2026-10-31
• City of Mesa — Mesa Building Code (2024 I-Codes effective January 8, 2026) — accessed 2026-10-31
• City of Mesa — Mesa Design Standards (2025 Engineering & Design Standards Manual) — accessed 2026-10-31
• City of Mesa — Environmental Requirements for Construction — accessed 2026-10-31
• City of Mesa — Mesa's Water Supply (Large Customer Sustainable Water Allowance) — accessed 2026-10-31
• City of Mesa — Water and Wastewater Capacity Fees (City Code § 8-10-13) — accessed 2026-10-31
• Mesa Fire and Medical — Fire Prevention — accessed 2026-10-31

Timelines are general information drawn from the sources listed, not advice on a specific project. Rules change; confirm current requirements with the authority.