Will Glendale's Data Center Hurt Cotton Lane Home Values?

Will the Glendale data center annexation near Cotton Lane hurt my property value?

It could, and being cautious is the right instinct. A home near a data center campus with its own gas power plant, or near a large battery storage site, can be affected by noise, construction traffic, sightlines, and buyer hesitation, and Arizona has very little track record with projects like these beside neighborhoods. The Cotton Lane item on Glendale's September 22 agenda is Larkspur, a proposed battery storage site, while the Project Eagle data center sits several miles east near Litchfield Road and Olive Avenue, so your exposure depends on which project you're near and how close.

If you own in Glendale's Yucca District or you've been touring near Cotton Lane and Olive Avenue, the last few weeks have probably felt like a lot. A statewide call to pause data centers, a council vote, and a battery storage campus all landed in the same news cycle, and your concern for the biggest asset you own is legitimate. I'd rather you take it seriously now than be surprised by a buyer later. Most coverage has also blended two very different projects into one "data center" story. I'll separate what's confirmed from what's proposed and show how this kind of neighbor can affect a West Valley home's value, so whether you're just exploring your options or ready to list, you can protect yourself with facts you can check.

What Glendale Is Voting On September 22 in West Glendale

Glendale's City Council has two energy-related items calendared for September 22, 2026, and neither is a final decision on whether anything gets built. One is an early annexation step for Project Eagle, the data center campus formerly called Project Baccara; the other is a zoning amendment for Larkspur at Cotton Lane and Olive Avenue.

Glendale approved a pre-annexation agreement for Project Eagle in April 2026, and the council gave informal consensus at an August 25 workshop. The September 22 item is the blank annexation petition; the signed petition and rezoning are set for October 27. Councilmembers have said the annexation decides who oversees the Project Eagle site, not whether it exists, and county permits are still pending.

Status as of September 2026. Sources: City of Glendale ZON25-14 notice and Glendale council records. Details not confirmed by city staff are labeled as the applicant's.

Is the Glendale Data Center Actually Near Cotton Lane?

No. The Project Eagle data center site sits several miles east of Cotton Lane, and the Cotton Lane and Olive Avenue project is a battery storage facility.

Larkspur, Glendale case ZON25-14, covers about 37 acres at the northeast corner of Cotton Lane and Olive Avenue, bordered by an existing APS substation on the east and the railroad on the south. The City of Glendale's neighborhood meeting notice for Larkspur describes an approximately 250-megawatt battery energy storage system. The applicant's narrative, not a city staff finding, adds a second phase, a 150-foot minimum setback to the battery cabinets, and an 8-foot wall, says the nearest homes are more than 500 feet away, and targets construction around 2028.

That 150-foot figure is no longer unusual. On September 1, 2026, the Surprise City Council voted 7-0, as ABC15 reported, to let battery storage sites sit anywhere from 100 to 500 feet from homes, decided project by project, even though city staff first recommended 1,500 feet based on evacuation guidance for hazardous incidents. Surprise knows the risk firsthand from the 2019 explosion at APS's McMicken battery facility, which injured responding firefighters. That rule doesn't govern Larkspur, which falls under Glendale zoning, but it shows West Valley battery sites can now be approved much closer to homes than many owners assume.

A battery site stores grid power rather than generating it and has no on-site turbines, so a street near Cotton Lane and one near Litchfield Road face different buyer questions.

How a Data Center or Battery Site Can Affect Glendale Home Values

A large energy project can affect nearby Glendale home values, and buyer hesitation usually shows up in showings and offers well before it shows up in closed sales. An appraiser works from recorded comparable sales, which is why big projects take a while to reach an appraisal, but a seller can feel fewer showings or tougher negotiations long before that.

This is usually where I slow sellers down, because waiting for the comps to prove an impact means reacting after buyers already have. Research on data centers and battery storage next to homes is still thin and mostly from other states, which is exactly why caution makes sense here. West Glendale buyers already weigh industrial land and Luke AFB flight noise; a new energy project adds one more question.

When I evaluate how exposed a home near Cotton Lane and Olive Avenue is to either project, five factors carry the most weight:

• Measured distance: The distance from your west Glendale parcel to a project boundary matters more than a cross-street or ZIP code, especially now that battery setbacks can be as small as 100 to 150 feet.
• Line of sight: A Glendale home facing a perimeter wall or equipment yard is judged differently than one with rooftops or open land in between.
• Type of operation: A battery storage yard beside an existing substation is a quieter, lower-traffic land use than a data center campus with its own gas power plant.
• Construction routing: Truck routes past your street during a build can hurt showings for a season, even if the finished site is quiet.
• Existing surroundings: A home already near Loop 303, the rail line, or industrial parcels has comparable sales reflecting that setting.

I used the same approach with owners near the Sarival industrial rezone in west Glendale: the closer and more visible the site, the more seriously the risk belongs in your pricing and timing.

What the Attorney General's Data Center Pause Means for Glendale Owners

For now, the Attorney General's call doesn't stop or pause anything in Glendale, because it's a request to lawmakers rather than a law. On August 31, 2026, Arizona Attorney General Kris Mayes asked Governor Hobbs and the Legislature to pass a pause on new data center approvals, citing rising power bills and a cut of almost 30 percent to Arizona's Colorado River supply, and the Legislature doesn't reconvene until January 2027. ABC15 reported Project Eagle could be affected if a pause became law, while the Arizona Chamber of Commerce & Industry argued data centers are necessary for the economy. For a Glendale homeowner, that debate adds uncertainty to Project Eagle's timeline, and uncertainty alone can make buyers hesitate. The release doesn't address battery storage projects like Larkspur.

What I Watch For Before a Cotton Lane Owner Lists or a Buyer Offers

The most useful next step near Cotton Lane is a comparable-sales check on homes beside existing APS substations and industrial parcels elsewhere in the West Valley. What I watch for here is whether homes a similar distance from an established substation sold for less, or sat longer, than homes farther away, because that tells us how much risk to build into your price.

At this stage, I help clients narrow their focus to three more things. Measure your parcel's distance to both project boundaries on the Maricopa County Assessor map. Follow the September 22 and October 27 Glendale votes, since buyers will ask about each outcome. And get disclosures right: a known nearby proposal belongs on your Seller's Property Disclosure Statement, described accurately as proposed, which I cover in selling near Project Baccara and what goes on your SPDS. Separately, A.R.S. § 28-8484 requires a seller's written disclosure when a home sits in territory in the vicinity of a military airport, which covers much of west Glendale. Buyers should do this homework inside the AAR contract's 10-day inspection period.

Frequently Asked Questions

Is the Glendale data center being built near Cotton Lane?
No. Project Eagle, the data center campus, is proposed north of Olive Avenue near Litchfield Road, several miles east of Cotton Lane. The Cotton Lane and Olive Avenue project is Larkspur, a battery storage proposal.

What is the Larkspur project at Cotton Lane and Olive Avenue?
Larkspur, Glendale case ZON25-14, is a proposed battery energy storage site of about 37 acres beside an existing APS substation. Glendale's notice describes about 250 megawatts, and the applicant describes a second phase.

Does the September 22 Glendale vote approve Project Eagle?
No. The September 22 item is the blank annexation petition, an early step. The signed petition and rezoning are set for October 27, and county permits are still pending.

Did the Arizona Attorney General stop Glendale's data center?
No. On August 31, 2026, Attorney General Kris Mayes asked lawmakers to pass a statewide pause on new data center approvals. It's a request, not a law, and the Legislature doesn't reconvene until January 2027.

Could a data center or battery site lower my Glendale home's value?
It could. Homes closest to either site, especially with a direct view or on a construction route, carry the most risk. Watch showing feedback and nearby sales, and build that risk into your pricing and timing.

Where This Leaves Cotton Lane Homeowners

Being cautious about a data center or battery site near your home is reasonable, especially when Arizona has so little history with projects like these beside neighborhoods and battery setbacks are shrinking. The homes closest to Project Eagle or Larkspur carry the most risk. Measure your actual distance to each site, study how comparable homes near existing substations have sold, disclose plainly, and let that risk shape your pricing and timing, and you'll walk away with a clear plan for your own street instead of a guess shaped by the loudest headline.

I'm Kasandra Chavez, REALTOR® and Team Lead of the Chavez Dream Home Team with Real Broker, serving the West and Northwest Valley of Greater Phoenix, Arizona, and recognized among the top 5% of real estate professionals in the Greater Phoenix area. If you own or are shopping near Cotton Lane and Olive Avenue, I'd love to pull those substation-area comparable sales with you and give you clear, personalized guidance for today's market and your unique situation.