Blog > SR 347 Widening Construction Timeline in Maricopa AZ?
Last updated: January 21, 2026
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SR 347 Widening Construction Timeline in Maricopa AZ?
Key Takeaways
- ADOT expects construction to begin in summer 2026 and last approximately three years.
- The project adds one lane each direction between I-10 and Maricopa (about 15 miles).
- Scope includes pavement rehab, two grade-separated interchanges, and intersection upgrades.
- Total programmed funding is $396 million, with no federal funding per ADOT.
ADOT's SR 347 Improvement Project is expected to widen SR 347 by one lane in each direction between I-10 and Maricopa and take approximately three years once construction begins. If you commute, buy, or sell here, the practical issue is reliability during construction, then smoother traffic flow after.
What ADOT Says Is Being Built
- Widening: Add one lane in each direction along the project corridor.
- Pavement rehabilitation: Repair and restore existing roadway.
- Two grade-separated interchanges: Riggs Road and Mammoth Way.
- Intersection improvements: Casa Blanca Road and Maricopa Road.
Local context: This corridor runs primarily through the Gila River Indian Community, so coordination and staging matter. I stick to ADOT's published language rather than rumors.
Timeline Based on ADOT Sources
| Milestone | What's Confirmed | What It Means for You |
|---|---|---|
| June 2025 | SR 347 widening included in ADOT's 5-year program. | Signals long-term commitment; not a day-by-day calendar. |
| Jan 2026 | ADOT selects Sundt Construction; $396M programmed; no federal funding. | Project moving through delivery steps before construction staging. |
| Summer 2026 (expected) | ADOT states construction is expected to begin summer 2026. | Test your commute at real hours now. Plan showing windows around reliability. |
| ~3 years after start | ADOT describes duration as approximately three years. | That's an estimate; don't buy or sell based on a guaranteed finish date. |
Construction Impact: What I Can Say Honestly
ADOT has not published a detailed lane-closure schedule on the main project overview. Until that exists, the honest guidance is: treat your commute as variable during the construction window and use official traffic tools before showings, inspections, or closing-day drives.
- Commuters: Use AZ511 on days you cannot be late.
- Buyers: Do a real test drive (weekday AM and PM) before removing contingencies.
- Sellers: I'll help you word this correctly, "construction is expected" and "approximately," not "it'll be done by ____."
Buyer Decision Box: Best If / Not Ideal If
- Best if: You can flex commute hours, work hybrid, or you're buying for a 5+ year hold.
- Best if: You want newer inventory value and are okay with a construction phase.
- Not ideal if: You must commute at strict peak times daily with zero schedule flexibility.
- Not ideal if: Commute reliability is your #1 deal-breaker right now.
Seller Decision Box: Pricing and Negotiation
- Price strategy: Don't "bake in" future benefits as guaranteed value. Buyers push back hard.
- Marketing: Lead with what's true today (condition, layout, lot, HOA clarity), then cite ADOT scope/timeline carefully.
- Negotiation: If a buyer is commute-sensitive, I position solutions: showing windows, remote-work spaces, realistic travel planning.
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What People Also Ask About SR 347 Widening in Maricopa AZ
When is SR 347 widening construction expected to start?
ADOT says construction is expected to begin in summer 2026 for the SR 347 Improvement Project, following preconstruction work and contractor coordination.
How long is the SR 347 widening project expected to take?
ADOT describes the duration as approximately three years once construction begins. That's an estimate, not a guaranteed completion date.
What part of SR 347 is being widened?
The project covers about 15 miles between I-10 and the City of Maricopa, adding one lane each direction and improving key intersections.
What exactly is being built besides new lanes?
ADOT lists lane additions, pavement rehabilitation, two grade-separated interchanges (Riggs Road and Mammoth Way), and intersection improvements at Casa Blanca Road and Maricopa Road.
Is SR 347 widening federally funded?
No. ADOT states there is no federal funding for this project; funding is programmed from state and local partners.
Who is the contractor?
ADOT selected Sundt Construction as the highest-ranking contractor to enter negotiations for the project under a CMAR delivery approach.
Will SR 347 be closed during construction?
ADOT has not published a detailed lane-closure schedule on the public project overview. Plan for changing traffic control and monitor official updates during construction.
Ready to make a move? If you're buying or selling in Maricopa and SR 347 commute reliability is part of the decision, call me at 520-838-8037. I'll map out a plan that matches your timeline and risk tolerance.
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Sources
- ADOT SR 347 Improvement Project: azdot.gov/sr347
- ADOT contractor negotiations news release (Jan 8, 2026): azdot.gov news
Disclaimer: Educational information about real estate in Maricopa, AZ (Pinal County). Not legal, financial, tax, or professional advice. Consult qualified professionals for your situation.
Equal Housing Opportunity. James Sanson, Real Broker.