BudgetGuessr rankings

The most expensive megaprojects from Spain in our catalogue

The 29 most expensive of 29 built and under-construction megaprojects in Spain in the BudgetGuessr catalogue, ranked by documented cost in US dollars.

1
Spain's high-speed rail network (AVE)
2017 · Railway$58.49 billion$58.49 billion€51.775 billion · Spent to date
2
Barcelona Metro Line 9 infrastructure (L9/L10)
2009 · Railway$7.66 billionUnder construction$7.66 billionUnder construction€6.9165 billion · Spent to date
3
Barcelona Metro L9/L10 network
2032 · Railway$7.09 billionUnder constructionEstimate$7.09 billionUnder constructionEstimate€6.271 billion · Published project estimate
4
Madrid-Barajas Terminal 4 and T4S
2006 · Airport$5.9 billion$5.9 billion€4.7 billion · Final project cost
5
Ciudad Real Central Airport
2008 · Airport$1.62 billion$1.62 billion€1.1 billion · Reported project cost
6
Madrid Metro
2024 · Railway$539.34 millionUnder construction$539.34 millionUnder construction€498.29 million · Contract value
7
FGC Sabadell extension
2017 · Railway$485.76 million$485.76 million€430 million · Reported project cost
8
Andasol solar power station
2011 · Energy$455.93 million$455.93 million€310 million · Final project cost
9
Nou Mestalla
2025 · Stadium$363.85 millionUnder construction$363.85 millionUnder construction€322 million · Financing amount
10
Barcelona Metro L5 extension to Vall d'Hebron
2010 · Railway$351.78 millionEstimate$351.78 millionEstimate€311.4 million · Published project estimate
11
San Mamés Stadium
2013 · Stadium$263.18 million$263.18 million€198.1 million · Approved budget
12
Barcelona Metro L3 extension to Trinitat Nova
2008 · Railway$230.17 million$230.17 million€156.5 million · Reported project cost
13
Castellón-Costa Azahar Airport
2011 · Airport$208.79 million$208.79 million€150 million · Reported project cost
14
Residential Intempo
2018 · Skyscraper$129.9 million$129.9 million€110 million · Contract value
15
Estadio de La Cartuja
1999 · Stadium$127.89 million$127.89 million€120 million · Final project cost
16
Puente de Castilla-La Mancha
2011 · Bridge$103 million$103 million€74 million · Reported project cost
17
Barcelona Metro L2 extension to Badalona Pompeu Fabra
2010 · Railway$92.8 million$92.8 million€70 million · Reported project cost
18
Assut de l'Or Bridge
2008 · Bridge$83.78 million$83.78 million€63.2 million · Final project cost
19
RCDE Stadium
2009 · Stadium$83.69 million$83.69 million€60 million · Reported project cost
20
wind farm on Serra de Rubió
2005 · Energy$68.42 million$68.42 million€55 million · Reported project cost
21
Third Millennium Bridge
2008 · Bridge$28.71 million$28.71 million€22.8685 million · Contract value
22
Estadio Municipal Nueva Balastera
2006 · Stadium$22.6 million$22.6 million€18 million · Reported project cost
23
Johan Cruijff Stadium
2019 · Stadium$21.27 million$21.27 million€19 million · Reported project cost
24
Estadio Las Gaunas
2002 · Stadium$18.91 million$18.91 million€20 million · Final project cost
25
Ibercaja Stadium
2024 · Stadium$13.75 million$13.75 million€12.7 million · Approved budget
26
Municipal Stadium of A Malata
1993 · Stadium$13.36 million$13.36 millionESP 1.7 billion · Reported project cost
27
Estadio Nuevo Colombino
2001 · Stadium$12.54 million$12.54 million€14 million · Approved budget
28
Central undimotriz de Mutriku
2011 · Energy$9.33 million$9.33 million€6.7 million · Final project cost
29
Estadio Francisco Artés Carrasco
2003 · Stadium$3.96 million$3.96 million€3.5 million · Reported project cost

How this ranking works

This is a curated catalogue, not an exhaustive list of every megaproject. Projects are ordered by their recorded US-dollar equivalent; each detail page shows the source amount and any currency conversion. Figures are not adjusted for inflation, and construction bills, estimates, and programme costs can have different scopes. Unbuilt proposals and cancelled projects are excluded.

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