Blog · Rewarding Heroes
303 Corridor: Amkor, TSMC and West Valley Growth
The Loop 303 corridor has become a focus of semiconductor industry announcements. Here is what the companies and official sources have actually said, and how to read those announcements without over-reading them.
By Andrew Texidor Realtor · Founder, Clearly Sold Updated October 7, 2026 
The direct answer
The Loop 303 corridor is the site of major announced semiconductor projects: Amkor Technology broke ground on an expanded advanced packaging campus in north Peoria in October 2025, and TSMC Arizona has announced successive expansions of its Phoenix-area fabs. These are real, officially announced projects, and their current status should always be verified with the companies and the Arizona Commerce Authority rather than with headlines.
Key takeaways
- Amkor Technology broke ground in October 2025 on an expanded advanced packaging and test campus near Loop 303 in north Peoria, with construction officially underway.
- TSMC Arizona has announced successive expansions of its Phoenix-area fabs, and the companies' own announcements and the Arizona Commerce Authority are the authoritative sources for current project status.
- Announced projects are exactly that: announcements. Construction timelines, job counts, and investment figures can and do change, so verify current status with the official sources.
- What a project means for any specific home's value or a neighborhood's future is not something anyone can responsibly predict, regardless of what the headlines suggest.
What has Amkor announced for the corridor?
Amkor Technology originally announced an advanced semiconductor packaging and test facility near Loop 303 in north Peoria in December 2023. The project was later relocated to a new site northwest of Loop 303 and Lake Pleasant Parkway, and in October 2025 Amkor broke ground on an expanded campus there, with construction officially underway. The company's own announcements and the City of Peoria's economic development pages are the authoritative sources for the current scope, timeline, and job figures.
What this means for the corridor is a question of fact, not of speculation: a major employer has committed to building in the area. What it means for any particular home or neighborhood is a different question entirely, and one nobody can answer responsibly in advance.
What is the current status of TSMC Arizona?
TSMC Arizona operates fabs in the Phoenix area and has announced successive expansions of its U.S. investment, including additional fabs, advanced packaging facilities, and an R&D center. The company's official announcements and the Arizona Commerce Authority have described the total as the largest foreign direct investment in U.S. history. Construction timelines and investment figures have been revised over time, which is normal for projects of this scale.
For anyone tracking the region, the reliable habit is to check the primary sources: TSMC's own announcements, Amkor's own announcements, and the Arizona Commerce Authority. Secondary coverage is useful for context, but the numbers belong to the companies and the state.
How should you read these announcements as a homebuyer?
An announced project is real news, but it is not a promise about your future home's value. Projects can be delayed, scaled, or changed, and a neighborhood's market is shaped by many factors beyond one employer. Anyone who tells you a specific project guarantees appreciation in a specific area is selling a prediction, not a fact.
The consumer-first way to use this information is as context: the corridor is attracting employers, which is one of many things worth understanding about an area you are considering. Then verify the current status of any project with official sources, and build your decision on the things you can confirm: commute, community, fees, and fit.
Why does this matter to Rewarding Heroes?
Rewarding Heroes is the Clearly Sold program serving veterans, first responders, and other community heroes. Many of the people the program serves live, work, or are relocating within the West Valley, and the corridor's industrial growth is part of the area's story. The program's role is to help those buyers and sellers make confident real estate decisions, not to forecast the economy or endorse any employer.
If you are a hero considering a move to the corridor, the same rules apply as for anyone: verify the facts with official sources, compare communities on the things you can confirm, and get advice from a professional who will lay out the tradeoffs rather than promise outcomes.
Frequently asked questions
What is Amkor building near Loop 303?
Amkor Technology is building an advanced semiconductor packaging and test facility in north Peoria. The project was originally announced in December 2023, was relocated to a new site near Loop 303 and Lake Pleasant Parkway, and Amkor broke ground on an expanded campus in October 2025. The company's own announcements and the City of Peoria's economic development pages are the authoritative sources for current details.
What is TSMC's status in Arizona?
TSMC Arizona operates fabs in the Phoenix area and has announced successive expansions of its U.S. investment. The company's official announcements and the Arizona Commerce Authority are the sources to watch, since construction timelines and investment figures have changed over time.
Does this mean home values near the corridor will rise?
Nobody can responsibly predict that. Announced projects can change, and many factors beyond a single employer shape a neighborhood's market over time. Treat any specific appreciation claim as speculation, and verify project status with official sources rather than headlines.
What does Rewarding Heroes have to do with this?
Rewarding Heroes is the Clearly Sold program serving veterans, first responders, and other community heroes. The 303 corridor's growth is context for anyone relocating to the West Valley, including the heroes the program serves, but the program itself is about real estate services, not economic forecasting.
Related resources
- Areas we serve A market-level view of Phoenix Metro and the West Valley.
- Community Guides Deep dives on Verrado, Estrella, Sun City, PebbleCreek, and more.
- Relocation guidance Buying from a distance: how the remote and in-person pieces fit together.
- Buyer Resources The whole buyer process in one place: financing, steps, and timelines.
- Search homes Browse current Phoenix-area listings and save the ones that fit.
- Book a strategy call Talk through your move with a local agent who knows the corridor.
Educational note: this article summarizes announced projects as reported by the companies and official economic development sources. Investment figures, timelines, and job counts change, and this article is not an endorsement of any employer or a prediction about home values. Verify current project status with the companies, the City of Peoria, and the Arizona Commerce Authority before making any decision based on it. Nothing here is investment or real estate advice.
Next step
Relocating to the West Valley corridor?
Whether you are moving for work, for family, or for the lifestyle, a strategy call gets you current, local answers about communities, commutes, and timing. No pressure, just a plan you can act on.
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