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

Rame automatique Alstom Metropolis à la station Szent Gellért tér de la ligne 4 du métro de Budapest.

Railway · Hungary

HUF 452.5 billion

Budapest Metro Line 4

2014

Approximately $1.95 billion

New trams operating in George street Sydney CBD - late December 2019 - 49281061742

Railway · Australia

AUD 3.147 billion

CBD and South East Light Rail

2020

Approximately $2.17 billion

Railway · Egypt

$1.8 billion

Cairo Metro Line 3, Phase 3

2015

Railway · Canada

CAD 2.054 billion

Canada Line

2009

Approximately $1.8 billion

Skyscraper · Singapore

SGD 1.3 billion

CapitaGreen

2014

Approximately $1.03 billion

Railway · People's Republic of China

CNY 14.827 billion

Changsha Metro, Line 2

2024

Approximately $2.06 billion

View south along U.S. Route 13 (Chesapeake Bay Bridge-Tunnel) crossing the North Channel of the Chesapeake Bay in Northampton County, Virginia

Bridge · United States

$200 million

Chesapeake Bay Bridge–Tunnel

1964

Clem Jones Tunnel Open Day - Under River

Tunnel · Australia

AUD 3 billion

Clem Jones Tunnel

2010

Approximately $2.75 billion

Railway · Qatar

$36 billion

Doha Metro

2019

Train south of the Burj Khalifa/Dubai Mall Dubai Metro Red Line station looking north in Dubai, United Arab Emirates, with highrise buildings in the background.

Railway · United Arab Emirates

AED 28 billion

Dubai Metro

2009

Approximately $7.62 billion

Bridge · Mexico

MXN 28.6 billion

Durango–Mazatlán Highway and Baluarte Bridge

2013

Approximately $2.24 billion

Eastern span of the San Francisco–Oakland Bay Bridge. The old and the new bridge, as seen at night from Yerba Buena Island to Oakland (mid September 2013).

Bridge · United States

$6.5 billion

Eastern span replacement of the San Francisco–Oakland Bay Bridge

2013

One of the Edinburgh Trams heading west along Princes Street, on the day the line was opened to the public. It's approaching the Hanover Street/Mound junction, beyond which is the Princes Street stop. Heading the other way are some Lothian Buses.

Railway · United Kingdom

£835.7 million

Edinburgh Trams

2023

Approximately $1.04 billion

Tunnel · Turkey

$1.245 billion

Eurasia Tunnel

2016

The Evergreen Point Floating Bridge, carrying State Route 520 over Lake Washington, seen from the north side bicycle and pedestrian trail from the west high-rise.

Bridge · United States

$849 million

Evergreen Point Floating Bridge

2017

The ceremony for the driving of the golden spike at Promontory Summit, Utah on May 10, 1869; completion of the First Transcontinental Railroad. At center left, Samuel S. Montague, Central Pacific Railroad, shakes hands with Grenville M. Dodge, Union Pacific Railroad (center right).

Railway · United States

$124.5487 million

First transcontinental railroad

1869

New w:Goethals Bridge over w:Arthur Kill between w:Staten Island, New York City and New Jersey in the USA. Supports for the old bridge are visible to the right of the new dual bridge. Also showen is the w:Arthur Kill Vertical Lift Bridge carrying a freight railroad track. The two barge-to-rail transfer facilities of New York City's new solid waste disposal system are also visible. One is on the New York Container Terminal on Staten Island, near the bottom, and is used by w:Covanta Energy; the ot

Bridge · United States

$1.436 billion

Goethals Bridge (replacement)

2018

Hazrat Shahjalal International Airport Terminal 3 in Bangladesh

Airport · Bangladesh

BDT 213 billion

Hazrat Shahjalal International Airport Terminal 3

2024

Approximately $1.84 billion

Southeastern High Speed Class 395 Javelin No. 395018 at London St Pancras International

Railway · United Kingdom

£6.163 billion

High Speed 1

2012

Approximately $12.33 billion

Railway · Vietnam

VND 43757 billion

Ho Chi Minh City Metro Line 1

2024

Approximately $1.81 billion

Aerial view of Great Seto Bridge linking Honshū and Shikoku islands in Japan

Bridge · Japan

¥2870 billion

Honshu-Shikoku Bridge Project

1999

Approximately $25.2 billion

Airport · Singapore

SGD 1.7 billion

Jewel Changi Airport (mixed-use building)

2019

Approximately $1.25 billion

Railway · United States

$2.1 billion

K Line

2022

Airport · Saudi Arabia

$7 billion

King Abdulaziz International Airport expansion

2018