BudgetGuessr project library

What the world’s biggest projects really cost

Compare published costs, timelines, project scale and original sources behind remarkable infrastructure and space missions.

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1733 projects

Salvadoran president Nayib Bukele and Mexican architect Fernando Romero in 2022 viewing a model of the Airport of the Pacific (Bitcoin City airport)

Airport · El Salvador

$386 million

Airport of the Pacific

2025

The Interstate Bridge seen from Vancouver, Washington, looking south toward Hayden Island in north Portland, Oregon, where Interstate 5 crosses the Columbia River. The railroad in the foreground parallels Washington State Route 14 east through the Columbia River gorge, and a C-Tran bus can be seen headed toward the corner where southbound Columbia Street becomes eastbound Columbia Way.

Bridge · United States

$14.4 billion

Interstate Bridge

2026

Edmondson Street Bridge closed for replacement as part of the Inland Rail project.

Railway · Australia

AUD 45 billion

Inland Rail

2026

Approximately $28.99 billion

Looking north along Hurontario Street at the interchange with Highway 401 in Mississauga, Ontario.

Railway · Canada

CAD 4.6 billion

Hazel McCallion Line

2019

Approximately $3.47 billion

The Angeles Crest Highway that runs through the Angeles National Forest. Camera used was a Sony Ericsson S710a.

Road or highway · United States

$10 million

Angeles Crest Highway

1956

Construction of the Rail Baltica high-speed railway in Riga, Latvia.

Railway · Estonia

€23.8 billion

Rail Baltica

2025

Approximately $26.89 billion

Info-graphic on ISRO's Gaganyaan orbital vehicle depicting Crew and Service Module in integrated configuration displayed at 6th Bangalore Space Expo 2018, 6-8 September 2018.

Space mission · India

INR 201.93 billion

Gaganyaan

2025

Approximately $2.32 billion

Road or highway · Montenegro

$1 billion

A-1 motorway

HCMT at Seddon testing on the werribee line

Airport · Australia

AUD 13 billion

Melbourne Airport rail link

2026

Approximately $8.38 billion

The platform at LA Metro’s Atlantic station in October 2023.

Railway · United States

$7.9 billion

Eastside Transit Corridor

2026

Coast path diversion adjacent to Sizewell C

Energy · United Kingdom

£38 billion

Sizewell C nuclear power station

2024

Approximately $48.57 billion

The Southwest Chief roughly 20 minutes east of Trinidad, Colorado. The Sangre de Cristo Range looms in the distance.

Railway · United States

$4.841 billion

Colorado Connector

2026

Fort Washington Way in Cincinnati, Ohio.

Road or highway · United States

$328 million

Fort Washington Way

2000

Bridge · People's Republic of China

CNY 2.22 billion

New Yalu River Bridge

2011

Approximately $343.58 million

The Lone Toilet on Highway 37 near Sears Point Rd

Road or highway · United States

$10 billion

California State Route 37

2022

Heathrow Express train prepares to depart from platform 3 at Heathrow Terminal 5 station with a service to London.

Airport · United Kingdom

£1.7 billion

Heathrow Southern Railway

2017

Approximately $2.19 billion

Construction activities of Kanaka line near Dooravanai Nagara.

Railway · India

INR 157.67 billion

Bangalore Commuter Rail

2030

Approximately $2.13 billion

11 Industrial Corridor Map of India which comes under the National Industrial Corridor Development Programme

Road or highway · India

INR 389.05 billion

Delhi–Katra Expressway

2026

Approximately $4.46 billion

Road or highway · United States

$17 million

Orchard Pond Parkway

2016

Mapa de la Línea 8 del Metro de Santiago.

Railway · Chile

$1.9 billion

Santiago Metro Line 8

2026

Abbot point port terminal infrastructure

Port · Australia

AUD 1.829 billion

Abbot Point Terminal 1 99-year lease

2011

Approximately $1.89 billion

Road or highway · United Kingdom

£693.743 million

A66 Northern Trans-Pennine upgrade

Approximately $1.07 billion

Roundabout at Knowsley Expressway where it meets Speke Road (A562)

Road or highway · United Kingdom

£47.334 million

A5300 Knowsley Expressway

1996

Approximately $78.39 million

Road or highway · United Kingdom

£12.2292 million

A38 Marsh Mills viaduct replacement

1996

Approximately $18.72 million