Prime Phoenix Campus (PHX01), Avondale

Power

Power and the grid

None energized or contracted yet

SRP grid power via dedicated on-site substationSubstation phase 1 commissioned (company says)

250 MW

substation size; phase 1 is commissioned (Prime says); IT capacity is 240 MW News report · Oct. 2026

Under construction

Getting on the grid

Who supplies what, what it costs, and what is still not public.

Aug. 9, 2022
Substation site planned next to SRP's Rudd Substation
A dedicated substation is planned beside an existing SRP substation. News report · Oct. 2026
May 2026
Substation phase 1 commissioned
Prime says phase 1 of the 250 MW on-site substation supports the first 144 MW of IT capacity. News report · Oct. 2026
Not set
Service agreement not public
SRP is a public power district, so no state utility commission filing covers the service. Company · Oct. 2026

A separate 250 MW battery project by Plus Power is planned at SRP's adjacent Rudd Substation. It is not part of this campus and is not counted in its power. News report · Oct. 2026

Permits

Permits checklist

2 pending · 1 granted · 2 checked, nothing on file

Approvals a campus like this normally needs, and what we found. Avondale, not Phoenix, controls the land use.

◷
Planned area rezoning (South PAD) Pending
City of Avondale · May 2022: resubmitted May 2022 after an earlier version was withdrawn in 2021; a final council vote was not found in our sources News report · Oct. 2026
◷
Building permits, buildings 1 and 2 Pending
City of Avondale · Feb. 18, 2025: pending as of Feb. 2025; groundbreaking followed in May 2026 News report · Oct. 2026
✓
Site plan and design review Granted
City of Avondale · Feb. 18, 2025: approved by city staff; mass grading plans also approved News report · Oct. 2026
–
Checked, nothing on file: Phoenix data center special permit, State data center tax exemption

Risks

What could slow it down

Medium
Schedule slip
The first building was projected for Q3 2025 in the 2023 plan, and no delivery date is released. Company · Oct. 2026
Medium
Buildings 4 and 5 unleased
Only buildings 1 to 3 have a tenant, a hyperscaler that is not named. News report · Oct. 2026
Watch
Tax break uncertain
No state exemption certificate for this campus was found, and new ones are barred through June 2029. News report · Oct. 2026
Watch
Past local opposition
The city planning commission recommended against an earlier version in 2021 over neighborhood and water concerns. News report · Oct. 2026

Money

Money on record

$3B+

stated investment

Prime says; customers invest more News report · Oct. 2026

$28.9M

land bought in April 2023 (press)

about $438,000 per acre News report · Oct. 2026

Timeline

What happened, and what is due

SitePaper trailConstructionPowerPermitsMoneyLegalUpcoming

Construction First building delivery: no date released News report · Oct. 2026
Nov. 2021
Permits Avondale planning commission recommends against an earlier Hermosa Ranch rezoning News report · Oct. 2026
Dec. 13, 2021
Permits City council withdraws the earlier application News report · Oct. 2026
May 2022
Permits New South PAD rezoning request submitted News report · Oct. 2026
April 2023
Money Prime buys the site for a reported $28.9 million News report · Oct. 2026
May 4, 2023
Site Prime announces five buildings, 210 MW, with the first building projected for Q3 2025 Company · Oct. 2026
Feb. 18, 2025
Permits City staff report site plan and mass grading approved; building permits pending News report · Oct. 2026
May 21, 2026
Construction Prime breaks ground on buildings 1 to 3; substation phase 1 commissioned News report · Oct. 2026
June 13, 2026
Money State budget bars new data center tax exemption certifications through June 2029 News report · Oct. 2026

Construction activity

Building activity by quarter

Since May 2026: 6 FAA filings (May 2026 to Oct. 2026): tallest permanent building 75 ft (filed May 2026) and tallest crane 400 ft (May 2026).

FAA filings

’26

Dot size: records in the quarter, largest = 3. Two-digit years mark each first quarter.

The buildings

Specs

5 buildings

about 1.3 million sq ft in all; roughly 267,000 sq ft each

Company · Oct. 2026

66.5 acres

campus site; zoning covers a 78-acre area

Company · Oct. 2026

Closed-loop cooling: air and liquid; zero process water in operations (company says) News report · Oct. 2026
ARCO/Murray: design-build contractor News report · Oct. 2026

Who is involved

Owners, partners and builders

Owners

Prime Data Centers: developer, owner and operator, based in Dallas

Decision-makers

City of Avondale: zoning, site plan and building permits
Maricopa County Air Quality Department: air permits

Power and build

Salt River Project: utility; operates the on-site substation
ARCO/Murray: design-build contractor

Customer

Undisclosed hyperscaler: buildings 1 to 3

Builders on site

ARCO/Murray (ARCOMurray): design-build contractor for PHX01

Still unknown

Open questions

Tenant name and lease terms.
Delivery date of the first building.
The council vote on the current rezoning.
Whether the data center tax exemption was certified.

Where this comes from

102 records from 14 documents

Drawn from news reports, company statements, state agency records and local government records, each kept with its date and source. The bar shows documents by type.

News report 6Company 5State agency 2Local government 1

Evidence

Every quote behind this page

Grade key: A = the primary record itself (permit, filing, exhibit) · B = a dated official statement · C = news reporting. Map distances are our own measurements on OpenStreetMap and carry no grade. Allegations in lawsuits are marked as such in the quotes.

Power (21)

Announced: May 4, 2023
“today announced expansion into the Phoenix market with a five-building, 66.5-acre campus in Avondale. Prime Phoenix will feature 210 megawatts of critical power”
Company · May 2023 · grade A
Building count: 5 buildings
“Prime's Phoenix campus to yield 240 MW critical across 5 hyperscale data centers.”
Company · Oct. 2026 · grade B
Utility: SRP (Salt River Project)
“Utility Provider, SRP, Substation, On site”
Company · Oct. 2026 · grade B
Buildings count: 5
“Prime Phoenix will feature 210 megawatts of critical power and 1.3 million square feet of space”
Company · Oct. 2026 · grade B
IT capacity: 240 MW
“CRITICAL IT LOAD 240MW”
Company · Oct. 2026 · grade B
Stated campus size: 240 MW
“Prime's Phoenix campus to yield 240 MW critical across 5 hyperscale data centers”
Company · Oct. 2026 · grade B
Utility: Salt River Project (SRP)
“Utility Provider, SRP, Substation, On site”
Company · Oct. 2026 · grade B
Power plan: grid
“Utility Provider, SRP, Substation, On site”
Company · Oct. 2026 · grade B
Jurisdiction note: Land-use authority is the City of Avondale (site inside Avondale city limits), not the City of Phoenix or Maricopa County. Phoenix Ordinance G-7396 (adopted Jul 2, 2025) amends the Phoenix Zoning Ordin
“The updated ordinance introduces new definitions and a Special Permit process that addresses potential health and safety impacts”
Local government · Oct. 2026 · grade B
Prime announces its first Phoenix-market campus: five buildings, 66.5 acres in Avondale, 210 MW critical power, 1.3M sq ft; first building projected Q3 2025. Campus later redesigned to 240 MW (see conflicts).
“announced expansion into the Phoenix market with a five-building, 66.5-acre campus in Avondale”
Company · Oct. 2026 · grade B
IT capacity: 240 MW
“Prime Data Centers, a leading international developer and operator of hyperscale and purpose-built data centers, today broke ground on the first three data centers of its new 5-building 240MW IT Phoenix campus in Avondale, Arizona.”
Company · May 2026 · grade B
Project status: under construction
“Prime Data Centers, a leading international developer and operator of hyperscale and purpose-built data centers, today broke ground on the first three data centers of its new 5-building 240MW IT Phoenix campus in Avondale, Arizona.”
Company · May 2026 · grade B
Groundbreaking May 21 2026 on first three buildings; original first-building completion had been projected for Q3 2025 in the 2023 announcement
“Prime Data Centers, a leading international developer and operator of hyperscale and purpose-built data centers, today broke ground on the first three data centers of its new 5-building 240MW IT Phoenix campus in Avondale, Arizona.”
Company · May 2026 · grade B
Dedicated on-site substation Phase 1 commissioned, supporting delivery of the first 144MW of critical IT capacity (3 x 48 MW)
“marking a critical milestone in the delivery of the first 144MW of critical IT capacity.”
Company · May 2026 · grade B
Utility service: 250 MW
“Phase 1 of the campus's 250MW substation has been commissioned”
News report · Oct. 2026 · grade C
On-site generation: not stated
“The data center will be served by a dedicated 256KSF substation planned on the NWC of the property next to Salt River Project's existing Rudd Substation”
News report · Oct. 2026 · grade C
Substation: Dedicated on-site substation operated by SRP, adjacent to SRP's Rudd Substation
“Utility provider SRP will operate a 250MW substation onsite”
News report · Oct. 2026 · grade C
Stage: building
“today broke ground on the first three data centers of its new 5-building 240MW IT Phoenix campus in Avondale, Arizona”
News report · Oct. 2026 · grade C
Cooling: Closed-loop air and liquid cooling; zero process water use in operations
“closed-loop cooling system engineered for zero process water use during operations”
News report · Oct. 2026 · grade C
Groundbreaking on buildings 1-3; Phase 1 of the 250 MW on-site SRP substation commissioned, supporting the first 144 MW of critical IT capacity; investment now stated at more than $3B.
“Phase 1 of the campus's 250MW substation has been commissioned”
News report · Oct. 2026 · grade C
An approximately 250 MW battery energy storage system from Plus Power was planned as an extension of SRP's existing Rudd Substation, adjacent to the campus's dedicated substation site. Separate grid-scale project - NOT c
“An approximately 250MW battery energy storage system from Plus Power is planned as an extension of the existing substation”
News report · Oct. 2026 · grade C

Money and contracts (14)

Tenants: Undisclosed hyperscaler (buildings 1-3)
“Availability Leased”
Company · Oct. 2026 · grade B
Original target date: 2025
“The first data center at the campus is projected for Q3 2025 completion and will provide 260,400 square feet and 42 critical megawatts”
Company · Oct. 2026 · grade B
tax incentive: condition
“To qualify for the tax relief, a qualified CDC must submit: 1) an application for CDC certification and receive a letter of certification from the ACA”
State agency · Oct. 2026 · grade B
tax incentive: scope
“Current statute exempts the gross proceeds of sales or gross income from CDC equipment that is to be used to outfit, operate or benefit the CDC”
State agency · Oct. 2026 · grade B
tax incentive: certification status (finding)
“With compelling state tax incentives, power costs 16% to 18% below national averages”
Company · Oct. 2026 · grade B
electric service: scope (finding)
“Utility Provider, SRP, Substation, On site”
Company · Oct. 2026 · grade B
lease: tenant commitment Buildings 1-3
“Buildings 1–3 have been secured by a leading hyperscaler, with Buildings 4 and 5 remaining available to meet additional demand.”
Company · May 2026 · grade B
Tenant status: Buildings 1-3 leased to a single unnamed hyperscaler; buildings 4-5 available
“Buildings 1–3 have been secured by a leading hyperscaler, with Buildings 4 and 5 remaining available to meet additional demand”
News report · Oct. 2026 · grade C
Capital cost: 3000000000 USD
“This more than $3 billion investment by Prime with its customers investing an average 2x more”
News report · Oct. 2026 · grade C
land purchase: scope 28900000 USD
“The company paid $28.9 million, or about $438,000 per acre, for the site in April”
News report · Oct. 2026 · grade C
land purchase: scope
“Prime Data Centers has bought 66 acres in Avondale on the south side of the Hermosa Ranch Technology Campus”
News report · Oct. 2026 · grade C
lease: scope
“Buildings 1–3 have been secured by a leading hyperscaler, with Buildings 4 and 5 remaining available to meet additional demand”
News report · Oct. 2026 · grade C
lease: termination (finding)
“Buildings 1–3 have been secured by a leading hyperscaler”
News report · Oct. 2026 · grade C
development agreement: scope (finding)
“The Hermosa Ranch Technology Campus – South PAD will replace the existing PAD zoning on the southern seventy-eight (78) acres of the undeveloped Diamond P Ranch”
News report · Oct. 2026 · grade C

Permits and government (21)

Phoenix Ordinance G-7396 (data-center special-permit regime) posture for this campus: NOT APPLICABLE. G-7396 amends the Phoenix Zoning Ordinance only; this campus is inside the City of Avondale and was entitled under Avo
“The updated ordinance introduces new definitions and a Special Permit process that addresses potential health and safety impacts”
Local government · Oct. 2026 · grade B
FAA obstruction evaluation (7460-1): Determined - No Hazard
“ASN 2026-AWP-15297-OE: Prime 3, Crane, 270 ft AGL, 1233 ft AMSL, 33.40766,-112.30828, Determined - No Hazard, submitted 2026-10-01”
FAA · Oct. 2026 · grade B
FAA obstruction evaluation (7460-1): Determined - No Hazard
“ASN 2026-AWP-16812-OE: Mobile Crane 3541 S Avondale Blvd, Mobile Crane, 250 ft AGL, 1216 ft AMSL, 33.41324,-112.30991, Determined - No Hazard, submitted 2026-09-22”
FAA · Sept. 2026 · grade B
FAA obstruction evaluation (7460-1): Determined - No Hazard
“ASN 2026-AWP-12792-OE: PHX 01 - 02 Data Center, Commercial Use Building, 65 ft AGL, 1028 ft AMSL, 33.41269,-112.30892, Determined - No Hazard, submitted 2026-07-01”
FAA · July 2026 · grade B
FAA obstruction evaluation (7460-1): Determined - No Hazard
“ASN 2026-AWP-12302-OE: Crane For Prime Data Roof, Mobile Crane, 300 ft AGL, 1268 ft AMSL, 33.41344,-112.31334, Determined - No Hazard, submitted 2026-06-23”
FAA · June 2026 · grade B
On-site substation Phase 1 (250MW substation): Commissioned
“marking a critical milestone in the delivery of the first 144MW of critical IT capacity.”
Company · May 2026 · grade B
Tallest structure filed with the FAA (ft): 75 ft
“ASN 2026-AWP-7872-OE: PHX 01 - Data Center, Commercial Use Building, 75 ft AGL, 1039 ft AMSL, 33.41286,-112.30761, Determined - No Hazard, submitted 2026-05-05”
FAA · May 2026 · grade B
FAA obstruction evaluation (7460-1): Determined - No Hazard
“ASN 2026-AWP-5614-OE: Prime Data Center, Crane, 400 ft AGL, 1363 ft AMSL, 33.41084,-112.30655, Determined - No Hazard, submitted 2026-05-05”
FAA · May 2026 · grade B
FAA obstruction evaluation (7460-1): Determined - No Hazard
“ASN 2026-AWP-7872-OE: PHX 01 - Data Center, Commercial Use Building, 75 ft AGL, 1039 ft AMSL, 33.41286,-112.30761, Determined - No Hazard, submitted 2026-05-05”
FAA · May 2026 · grade B
The public feed names no sponsor page, work dates or expiry, so none are recorded.
“ASN 2026-AWP-5614-OE: Prime Data Center, Crane, 400 ft AGL, 1363 ft AMSL, 33.41084,-112.30655, Determined - No Hazard, submitted 2026-05-05”
FAA · May 2026 · grade B
Zoning: Hermosa Ranch Technology Campus - South PAD (City of Avondale)
“The Hermosa Ranch Technology Campus – South PAD will replace the existing PAD zoning on the southern seventy-eight (78) acres of the undeveloped Diamond P Ranch”
News report · Oct. 2026 · grade C
rezoning: application withdrawn
“Avondale City Council voted to withdraw the application in its December 13th meeting”
News report · Oct. 2026 · grade C
rezoning: PAD application resubmitted
“A new request was submitted in May, following a pre-submittal meeting held on April 27th”
News report · Oct. 2026 · grade C
site plan: site plan and design review approved
“staff has approved the site plan and design review; mass grading plans have been approved”
News report · Oct. 2026 · grade C
building permit: building permits pending
“Building permits for Buildings 1 and 2 and the final plat are pending”
News report · Oct. 2026 · grade C
substation: substation phase 1 commissioned
“Phase 1 of the campus's 250MW substation has been commissioned”
News report · Oct. 2026 · grade C
construction: groundbreaking
“today broke ground on the first three data centers of its new 5-building 240MW IT Phoenix campus in Avondale, Arizona”
News report · Oct. 2026 · grade C
Arizona's FY2027 budget bars the Arizona Commerce Authority from certifying NEW data centers for the equipment tax exemption from Jul 1, 2026 through Jun 30, 2029; the 83 projects certified by mid-June 2026 keep their ex
“From 2013 to mid-June, the state approved 83 data centers for the tax break, according to Patrick Ptak, a spokesperson for the commerce authority”
News report · Oct. 2026 · grade C
Avondale Planning Commission: Hermosa Ranch Technology Park Master Plan PAD rezoning and General Plan Amendment
“The Avondale Planning Commission recommended against an earlier request last November”
News report · Oct. 2026 · grade C
Avondale City Council: Hermosa Ranch master-plan application
“Avondale City Council voted to withdraw the application in its December 13th meeting”
News report · Oct. 2026 · grade C
Avondale Planning Commission: Staff project update: Hermosa Ranch Tech Campus South (Prime Data)
“Staff described Hermosa Ranch Tech Campus South (also called Prime Data), a 78-acre site”
News report · Oct. 2026 · grade C

Site and other (16)

Site location: 3700 S. Avondale Blvd (PHX01-01), Avondale, AZ
“Name PHX01-01 | 3700 S. Avondale Blvd”
Company · Oct. 2026 · grade B
Name: Prime Phoenix (PHX01)
“Phoenix Campus PHX01”
Company · Oct. 2026 · grade B
Developer: Prime Data Centers
“Prime, a developer and operator of hyperscale and wholesale data centers in America and Europe, today announced expansion into the Phoenix market”
Company · Oct. 2026 · grade B
City: Avondale
“announced expansion into the Phoenix market with a five-building, 66.5-acre campus in Avondale”
Company · Oct. 2026 · grade B
County code: Maricopa County, AZ (04013)
“The Avondale location is in Maricopa County a few minutes west of downtown Phoenix”
Company · Oct. 2026 · grade B
Address: 3700 S. Avondale Blvd, Avondale, AZ
“NAME PHX01-01 | 3700 S. Avondale Blvd”
Company · Oct. 2026 · grade B
Site acres: 66.5 acres
“five-building, 66.5-acre campus in Avondale”
Company · Oct. 2026 · grade B
Building size sq ft: 267000 sq ft
“Size 267,000 sq ft”
Company · Oct. 2026 · grade B
Total sq ft: 1300000 sq ft
“Size 1,300,000 sq ft”
Company · Oct. 2026 · grade B
Construction stage: Buildings 1-3 under construction (ground broken May 21, 2026); building 4 under construction and building 5 in development per Prime's campus page
“Status Construction”
Company · Oct. 2026 · grade B
County code: 04013
“The Avondale location is in Maricopa County a few minutes west of downtown Phoenix.”
Company · May 2023 · grade B
Site acres: 66.5 acres
“announced expansion into the Phoenix market with a five-building, 66.5-acre campus in Avondale.”
Company · May 2023 · grade B
Developer: Prime Data Centers
“Prime, a developer and operator of hyperscale and wholesale data centers in America and Europe, today announced expansion into the Phoenix market”
Company · May 2023 · grade B
Pad area acres: 78 acres
“Staff described Hermosa Ranch Tech Campus South (also called Prime Data), a 78-acre site about a half mile south of Lower Buckeye Road and Avondale Boulevard”
News report · Oct. 2026 · grade C
Current target date: not stated
“The construction timeline was not released”
News report · Oct. 2026 · grade C
Closed-loop cooling engineered for zero process water use in operations; Prime procures Water Restoration Certificates equal to 120% of its annual operating water consumption across its portfolio.
“Prime procures Water Restoration Certificates® (WRCs) equal to 120% of its annual operating water consumption across its portfolio”
News report · Oct. 2026 · grade C