01
Infrastructure investment
Bipartisan Infrastructure Law funding is flowing through mid-cycle tunnels, bridges, and rail lines now in their heaviest construction years.
America's Biggest Construction Projects Underway in 2026
America’s biggest construction projects in 2026 are being driven by semiconductor manufacturing, AI data centers, high-speed rail, tunnels, airports, and major infrastructure investment. Projects such as TSMC Arizona, Samsung Taylor, Stargate, California High-Speed Rail, Brightline West, the Hudson Tunnel, and JFK’s terminal redevelopment are creating massive demand for CAD drafting, BIM coordination, structural detailing, MEP coordination, shop drawings, and as-built documentation. The blog also explores how these megaprojects are shaping the future of construction and digital design.
01·Introduction
A construction cycle unlike any other
The United States is in the middle of one of the largest sustained construction booms in its history - and 2026 sits right at the peak of it. Four forces are converging at once: a federal push to re-shore semiconductor manufacturing, an unprecedented buildout of AI data center capacity, a generational wave of transportation and transit investment, and a housing and energy infrastructure gap that's finally getting real capital behind it.
On the manufacturing side, the CHIPS and Science Act kicked off a re-shoring cycle that has since taken on a life of its own. TSMC alone has pushed its committed U.S. investment from an initial $12 billion in 2020 to $165 billion, and then to $265 billion as of July 2026, spanning what is planned to eventually be a 10-fab, two-packaging-facility cluster in Phoenix, Arizona. Samsung's $17–44 billion Taylor, Texas campus is entering its final commissioning phase in the same window.
Layered on top of that is the AI infrastructure race. OpenAI, Oracle, SoftBank, and Microsoft are collectively pouring hundreds of billions of dollars into gigawatt-scale data center campuses across Texas, New Mexico, Wisconsin, Ohio, and beyond - Stargate alone represents a stated $500 billion commitment. These aren't traditional buildings; they are power plants, substations, and cooling infrastructure wrapped around server halls, built at a pace the construction industry has never attempted before.
Add a slate of transportation megaprojects - California High-Speed Rail, Brightline West, the Hudson Tunnel Project, JFK's $19 billion terminal overhaul - and you have a construction pipeline spanning nearly every U.S. region and discipline: heavy civil, structural steel, MEP, cleanroom fit-out, and electrical infrastructure at gigawatt scale. Total U.S. construction spending has held near a $2.1–2.2 trillion annualized rate through 2025–2026, with manufacturing-related construction - driven overwhelmingly by semiconductor and data center projects - among the fastest-growing segments of that total.
This article walks through the specific megaprojects actually under active construction in 2026 - not just announced or speculative ones - with real costs, locations, and status as reported by the agencies and companies building them. We'll then look at what these projects mean for the industry: the CAD and BIM workload they generate, the engineering challenges they raise, and what contractors, architects, and drafting professionals can take from how they're being executed.
02·Context
Why 2026 is a historic year for U.S. construction
Eight trends are converging in the same twelve months - each one alone would be a significant construction story. Together, they're reshaping the industry.
02
Manufacturing reshoring
Fabs announced in 2020–22 are reaching equipment-installation and ramp-up - the most CAD/BIM- and MEP-intensive phase of a fab's life.
03
The AI & data center boom
Hyperscale campuses, measured in gigawatts rather than square feet, are now the single largest driver of new industrial floor space.
04
Renewable & grid energy
Data centers and reshored manufacturing are straining regional grids, triggering a parallel wave of substation and transmission construction.
05
High-speed rail expansion
One public program (California), one private (Brightline West) - both in active heavy civil construction simultaneously for the first time.
06
Airport modernization
JFK and LaGuardia are mid-way through terminal replacement programs, timed partly to the U.S.-hosted 2026 FIFA World Cup.
07
Housing demand
Population growth around new fab and data center sites is triggering secondary residential booms in towns that were rural five years ago.
08
Capital at scale
Private balance sheets - not just federal grants - are now funding megaprojects once thought too large for anyone but government.
03·The Projects
America's biggest construction projects underway in 2026
Verified against agency releases, company disclosures, and trade press. Costs and schedules on projects this size shift often - figures reflect the most recent public numbers as of mid-2026.
TSMC-AZ/PROJECT 01
TSMC Arizona - "GigaFab Cluster"
PHOENIX, ARIZONA·SEMICONDUCTOR MANUFACTURING
Est. cost
$165B → $265B
Completion
Phased into 2030s
Status
Active - Fab 2 equip. install
Sector
Advanced logic / AI chips
Purpose
Advanced logic semiconductor manufacturing (4nm, 3nm, 2nm, and future nodes) supplying Apple and Nvidia, including Blackwell-generation AI chips.
Status & facts
Fab 1 has been in high-volume N4 production since Q4 2024. Fab 2's structure is complete, with equipment move-in targeted for Q3 2026 and volume N3 production in H2 2027. Fab 3 broke ground in April 2025. This is the largest single foreign direct investment project in U.S. history - the site has grown past 2,000 acres to accommodate a planned 10-fab cluster. TSMC has said U.S. fab construction costs run roughly four to five times higher than equivalent construction in Taiwan.
SAM-TX/PROJECT 02
Samsung Taylor Fab 1 & Fab 2
TAYLOR, TEXAS·SEMICONDUCTOR MANUFACTURING
Est. cost
$17B → ~$44B
Completion
Fab 1: 2026 · Fab 2: 2030
Status
Active - final commissioning
Sector
Logic / memory chips
Purpose
Advanced logic and memory chip manufacturing (targeting 2nm-class nodes) for 5G, AI, and high-performance computing; Tesla has signed a long-term supply agreement tied to the facility.
Status & facts
Fab 1 is targeted for full operational status by end of 2026, after two prior delays from an original 2024 target. Fab 2 construction is set to begin by end of 2026, with mass production targeted for 2030. Main Fab 1 structures are largely complete, with equipment installation and calibration ongoing; roughly 1,500 permanent employees are expected on-site by year-end.
STARGATE/PROJECT 03
Stargate - OpenAI / Oracle / SoftBank
TX · NM · WI · MI · OH·AI DATA CENTER PLATFORM
Est. cost
$500B (program)
Completion
Rolling through 2029
Status
Active - multi-site
Sector
AI compute infrastructure
Purpose
Gigawatt-scale AI compute infrastructure hosting Nvidia GB200/Blackwell GPU clusters for OpenAI workloads, financed jointly by OpenAI, Oracle, SoftBank, and MGX.
Status & facts
Abilene's first buildings have been operational since late 2025; the campus topped out its eighth and final building in mid-2026 after roughly two years of continuous construction - roughly 4 million sq ft and 1.2 GW at full build. The remaining six sites (Shackelford & Milam Counties in TX, Doña Ana County NM, plus WI/MI/OH) remain in earlier phases. The full seven-site program targets 9+ GW of capacity by 2029 - comparable to the peak power demand of New York City.
CA-HSR/PROJECT 04
California High-Speed Rail - Central Valley
MERCED → BAKERSFIELD, CA·ELECTRIFIED PASSENGER RAIL
Est. cost
Multi-billion, segment
Completion
Initial segment - TBD
Status
Active - 171 mi. underway
Sector
220 mph passenger rail
Purpose
220 mph electrified passenger rail eventually connecting the Bay Area to Los Angeles/Anaheim, with the Central Valley segment as the operating backbone.
Status & facts
As of the Authority's March 2026 business plan, 171 miles are under design and construction, with nearly 80 miles of guideway complete, 61 major structures finished (June 2026), and roughly 30 more underway. A track-and-systems construction contract was awarded mid-2026 - the shift from civil construction into rail installation. The project has created 16,400+ construction jobs, roughly three-quarters going to Central Valley residents.
BL-WEST/PROJECT 05
Brightline West
LAS VEGAS → RANCHO CUCAMONGA·PRIVATE HIGH-SPEED RAIL
Est. cost
$8B → ~$21.5B
Completion
Late 2029 (was 2028)
Status
Active - early civil / grading
Sector
200 mph passenger rail
Purpose
America's first true high-speed rail line (up to 200 mph), cutting LA–Las Vegas drive time roughly in half - with a station in Victorville/Apple Valley.
Status & facts
Geotechnical borings, utility potholing, and grading are underway in both Nevada and California, though heavy civil construction has run slower than planned - partly pending a $6 billion federal loan the company was still pursuing as of March 2026. Originally targeted for the 2028 LA Olympics, completion has slipped to late 2029. Nearly the entire 218-mile route runs inside the I-15 median, avoiding most new right-of-way acquisition.
HTP/PROJECT 06
Hudson Tunnel Project (Gateway)
NORTH BERGEN, NJ → MANHATTAN, NY·UNDER-RIVER RAIL TUNNEL
Est. cost
$16B
Completion
TBM boring starts 2026
Status
Active - resumed post-suspension
Sector
Rail infrastructure
Purpose
A new rail tunnel beneath the Hudson River to relieve the century-old, Superstorm-Sandy-damaged existing tunnel and add capacity for NJ Transit and Amtrak into New York Penn Station.
Status & facts
Tunnel boring is scheduled to begin mid-to-late 2026, with Hudson River ground stabilization targeted for 2027. A February 2026 federal funding suspension briefly halted work for about two and a half weeks and idled ~1,000 workers before court rulings restored funding. Crews have since completed the Tonnelle Avenue Bridge, poured 11,000+ cubic yards of concrete, and begun assembling the first tunnel boring machine.
JFK-NTO/PROJECT 07
JFK New Terminal One & Terminal 6
QUEENS, NEW YORK·INTERNATIONAL AVIATION TERMINAL
Est. cost
$9.5B + $4.2B
Completion
Phase 1: 2026 · Full: 2028–30
Status
Active - weather-tight, fit-out
Sector
Aviation infrastructure
Purpose
Replacing JFK's aging Terminal 1/2/3 complex with a single 2.6M sq ft international terminal, plus a new Terminal 6 on the former Terminal 7 site - part of the Port Authority's $19B JFK redevelopment.
Status & facts
New Terminal One's first phase (14 gates) is targeted to open in 2026, timed partly to the 2026 FIFA World Cup, with full 23-gate build-out completing in 2030. As of early-to-mid 2026 the structure is weather-tight, with baggage systems and ticket counters already installing. At 2.6M sq ft, it will be roughly the footprint of the Empire State Building laid on its side - the largest standalone terminal in the U.S.
Opened Jul 27 2026 - Not Under Construction
GHIB / BENCHMARK
Gordie Howe International Bridge
DETROIT, MI ↔ WINDSOR, ON·RECENTLY COMPLETED BENCHMARK
Est. cost
$5B
Completed
June 2026 (structure)
Opened
July 27, 2026
Sector
Cable-stayed bridge
Though no longer under construction, the Gordie Howe Bridge is worth including as a benchmark for what a 2026-era megaproject delivery actually looks like. The $5 billion, 1.5-mile crossing between Detroit and Windsor features the longest cable-stayed main span in North America. Its final months illustrate a pattern common across several projects on this list: the physical build finished well ahead of the actual opening, which was delayed by a toll-revenue dispute between the U.S. and Canadian governments - not by any construction issue. A reminder that megaproject schedules are shaped as much by politics and financing as by engineering.
Reference table
Project comparison at a glance
| Project | Location | Est. cost | Target completion | Sector |
|---|---|---|---|---|
| TSMC Arizona | Phoenix, AZ | $165B–$265B | Phased through 2030s | Semiconductor |
| Samsung Taylor | Taylor, TX | ~$37–44B | Fab 1: 2026 · Fab 2: 2030 | Semiconductor |
| Stargate | TX / NM / WI / MI / OH | $500B (program) | Rolling through 2029 | AI data centers |
| CA High-Speed Rail | Central Valley, CA | Billions (segment) | Initial segment TBD | Passenger rail |
| Brightline West | Las Vegas–Rancho Cucamonga | ~$21.5B | Late 2029 | Passenger rail |
| Hudson Tunnel Project | NJ–NY (under Hudson River) | $16B | Boring starts 2026; multi-yr | Rail infrastructure |
| JFK NTO / Terminal 6 | Queens, NY | $9.5B / $4.2B | Phase 1: 2026 · Full: 2028–30 | Aviation |
Figures reflect the most recent publicly disclosed estimates as of mid-2026 and are subject to change, as is typical for projects of this scale.
04·Signal
Industry trends these projects reveal
Looking across all seven projects, the same patterns keep resurfacing.
AI is now a direct client
Data center demand from OpenAI, Microsoft, and peers is arguably the single largest driver of new industrial construction volume in the country right now.
Data centers as power plants
On-site gas turbines, dedicated substations, and off-grid generation are now standard scope on hyperscale campuses.
Prefabrication accelerates
Semiconductor and data center projects lean hard on prefabricated MEP racks and skid-mounted equipment to compress schedule.
BIM is table stakes
No longer a differentiator - especially on cleanroom, tunnel, and phased-airport work where clash failures cost real weeks.
Digital twins go operational
Moving from marketing language into real tools owners use to track equipment commissioning against a live model.
Modular rail construction
Precast segments and prefabricated grade separations keep pace with tight windows around active roadways.
Robotics on site
Rebar tying, concrete finishing, and surveying automation showing up most on long, repetitive data center and guideway work.
Sustainability by default
Water reclamation at TSMC Arizona, ESG-tracked milestones at JFK, and zero-emission electric trains on both HSR programs.
05·Opportunity
CAD, BIM & drafting opportunities
This is where the current construction cycle matters most for design and drafting professionals and firms. Every project profiled above generates an enormous, sustained volume of drawing and modeling work - often for years, since fabs, data centers, and terminals are built and re-built in phases as technology and tenant requirements shift.
BIM coordinationStructural draftingShop drawingsPermit drawingsMEP coordinationScan-to-BIMAs-built documentation3D visualization
BIM coordination
Federated models combining structural, architectural, and MEP disciplines are now the default delivery method on nearly all of these project types, particularly cleanrooms and data halls where physical rework is prohibitively expensive - see how BIM modeling supports that coordination at scale.
Structural drafting
Steel and precast detailing for viaducts, terminal roof structures, and fab superstructures, at tolerances far tighter than typical commercial construction - work that depends on precise structural drafting.
Shop drawings
Fabrication-level detailing for steel, MEP racks, and modular assemblies that megaproject GCs rely on to keep prefabrication pipelines moving through accurate shop drawings.
Permit drawings
Especially on Brightline West and the Hudson Tunnel Project, where multiple jurisdictions (state DOTs, cities, federal agencies, two states) each require their own permit drawings review packages.
MEP coordination
The single biggest driver of drafting demand on data centers and fabs, where dense, interdependent systems are constantly revised as equipment specs change late in construction - a core use case for MEP drafting.
Scan-to-BIM
Critical on brownfield, phased projects like JFK, where new construction ties precisely into existing, still-operating infrastructure via scan-to-BIM.
As-built documentation
Each phase's as-built model becomes the baseline for the next - essential when terminals, tunnels, and fabs are built and rebuilt in stages, which is why as-built documentation stays in demand.
3D visualization
Used for stakeholder buy-in, sequencing reviews, and communicating complex MEP/structural conditions across owner, GC, and trade teams through 3D visualization.
06·Lessons
What the field is teaching contractors, architects & engineers
For contractors
- Early planning pays off disproportionately - California HSR's segment-by-segment structure shows the value of breaking a massive program into trackable, fundable pieces.
- Clash detection early saves money late - fab projects prove how expensive post-pour coordination failures become.
- Documentation discipline protects funding - Hudson Tunnel's brief 2026 suspension shows paperwork can matter as much as physical progress.
- Outsourced CAD/BIM at scale is now normal - no GC can realistically staff peak drafting volume entirely in-house.
- Cost control needs constant re-baselining - Brightline West's jump from $8B to $21.5B underlines the value of frequent, transparent reforecasting.
- Schedule risk isn't just construction risk - permitting disputes and funding fights can delay a physically finished project by months.
For architects & engineers
- Revit remains the backbone for architectural and MEP coordination on nearly every large U.S. building project, including terminals and fab support buildings.
- Civil 3D is essential for the corridor-based work driving CA-HSR, Brightline West, and Hudson Tunnel approach infrastructure.
- Navisworks is standard for clash detection and 4D scheduling on cleanroom and data center projects.
- Tekla sees heavy use on structural steel detailing for viaducts, roof structures, and long-span bridges.
- AI-assisted drafting is accelerating repetitive detailing - rack layouts, standardized connections - freeing engineers for non-standard conditions.
- Cloud collaboration platforms are now contractually required on most public-agency projects listed here.
Recent Blogs
America's Biggest Construction Projects Underway in 2026General Contractor Fee Structures, Rates, and Full Project Budget BreakdownWhy BIM Is Eating the CAD Industry: 2026 Growth Trends ExplainedAI Floor Plan Generators in 2026: Can They Replace CAD Drafters?Shop Drawings vs. As-Built Drawings vs. Permit Drawings
§ 07 Forward look
Future outlook - 2027 to 2030
Semiconductor expansion
TSMC's newly announced Fabs 3 & 4 and Samsung's Fab 2 push construction activity in Arizona and Texas well into the early 2030s.
AI infrastructure scales
Stargate's stated trajectory toward 9+ GW by 2029 keeps data centers among the largest categories of U.S. industrial construction for years.
Grid buildout accelerates
The same power demand straining interconnection today likely drives a parallel wave of transmission and generation construction.
Transportation delivers
CA-HSR's initial operating segment and Brightline West's 2029 date put both on a path toward real passenger service this decade.
Digital twins mature
As more megaprojects go live with as-built digital twins, owners lean on model-based facility management beyond just construction.
Frequently Asked Questions
Most charge 10-20% of total project cost, whether built into a fixed-price bid or added on top of actual costs under cost-plus. Small, complex, or high-risk renovation scopes can push that to 15-25%.