Company lists · Data refreshed September 2026

Top 25 Utility construction companies based in Spain

Name: Utility construction companies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 193 companies tracked

RevenueBase identified 193 utility construction companies headquartered in Spain as of September 2026 and tracks 6,190 professional contacts across them, including 267 with verified work emails. Madrid is the largest hub.

This list covers utility construction companies headquartered in Spain, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

193Companies

6,190Contacts tracked

267Verified emails

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The 25 largest utility construction companies based in Spain

Ranked by team size

Top 25 of 193 utility construction companies based in Spain, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to utility construction companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Isolux Corsan	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	5,001-10,000	1,649 contacts →
	Indirect evidence “Isolux is a global benchmark in energy, water and environmental, road and railways infrastructure with presence in more than 35 countries on four continents.” Source: RevenueBase Database · checked Sep 19, 2026
2	Grupo Lantania	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	1,001-5,000	475 contacts →
	Indirect evidence “En Lantania hacemos realidad grandes infraestructuras de transporte, agua y energía con el entusiasmo de una empresa joven y la solidez que nos aporta la experiencia.” Source: RevenueBase Database · checked Sep 19, 2026
3	OSSA	Indirect evidence	San Sebastián De Los Reyes, SpainHQ checked Sep 19, 2026	501-1,000	405 contacts →
	Indirect evidence “OSSA is the leading company in the Spanish market in underground projects in Mining, Civil Engineering tunneling (Road, Rail and Subway/Metro tunnels), Underground Hydraulic…” Source: RevenueBase Database · checked Sep 19, 2026
4	Espina Obras Hidraulicas S.A	Indirect evidence	Santiago De Compostela, SpainHQ checked Sep 19, 2026	201-500	209 contacts →
	Indirect evidence “ESPINA is a constantly growing company that has been expanding its areas of activity and services in Spain since 1989 and in Uruguay and the Ivory Coast since 1995.” Source: RevenueBase Database · checked Sep 19, 2026
5	Almar Water Solutions	Partial evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	148 contacts →
	Partial evidence “Almar Water Solutions is a leading global water infrastructure development and services business creating innovative, utility-scale, solutions for both municipal and industrial…” Source: RevenueBase Database · checked Sep 19, 2026
6	Tecopsa	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	125 contacts →
	Indirect evidence “Tecnología de la Construcción y Obras Públicas, S.A, tiene su origen en el sector de las energías renovables.” Source: RevenueBase Database · checked Sep 19, 2026
7	Rodio Kronsa	Indirect evidence	Pozuelo De Alarcón, SpainHQ checked Sep 19, 2026	201-500	99 contacts →
	Indirect evidence “Somos una empresa de referencia con más de 80 años de experiencia en cimentaciones y tecnologías de suelo.” Source: RevenueBase Database · checked Sep 19, 2026
8	Acsa Obras E Infraestructuras, S.A	Indirect evidence	Barcelona, SpainHQ checked Sep 19, 2026	1,001-5,000	97 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
9	Geocontrol S.A	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	78 contacts →
	Indirect evidence “GEOCONTROL es una ingeniería fundada en 1982 especializada en obra civil e instalaciones de seguridad de Obras Subterráneas que ofrece soluciones técnicas avanzadas a través de su…” Source: RevenueBase Database · checked Sep 19, 2026
10	Virtón	Indirect evidence	Majadahonda, SpainHQ checked Sep 19, 2026	51-200	70 contacts →
	Indirect evidence “Virtón es una empresa de construcción fundada en 1974.” Source: RevenueBase Database · checked Sep 19, 2026
11	Grulop	Indirect evidence	Granada, SpainHQ checked Sep 19, 2026	51-200	68 contacts →
	Indirect evidence “Referentes en Construcción de alto valor técnico y Obra Civil \| Expertos en Infraestructuras, Edificación, Energía, Obra Hidráulica y Servicios Como parte integral de GRUPO INEXO…” Source: RevenueBase Database · checked Sep 19, 2026
12	Cots I Claret	Indirect evidence	Manresa, SpainHQ checked Sep 19, 2026	51-200	53 contacts →
	Indirect evidence “A Cots i Claret volem acompanyar-te en la construcció del teu projecte.” Source: RevenueBase Database · checked Sep 19, 2026
13	GAROC	Indirect evidence	Ciudad Real, SpainHQ checked Sep 19, 2026	201-500	35 contacts →
	Indirect evidence “GAROC (GRUPO DE ARQUITECTURA Y OBRA CIVIL), nace en mayo de 2003 en Ciudad Real donde tiene su sede Social.” Source: RevenueBase Database · checked Sep 19, 2026
14	Polaroo	Indirect evidence	Barcelona, SpainHQ checked Sep 19, 2026	11-50	32 contacts →
	Indirect evidence “We save tons of hours and money in the management of recurrent expenses like electricity, gas, water, telephone, Internet, insurance, alarms and others for companies, and we seek…” Source: RevenueBase Database · checked Sep 19, 2026
15	Pacsa, Servicios Urbanos Y DEL Medio Natural, S.L	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	32 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
16	OPS Infraestructuras Y Servicios Hidraulicos SL	Partial evidence	Humanes De Madrid, SpainHQ checked Sep 19, 2026	51-200	25 contacts →
	Partial evidence “OPS INFRAESTRUCTURAS Y SERVICIOS HIDRAULICOS SL is a construction company based out of CALLE DALIA, 4, MADRID, Madrid, Spain.” Source: RevenueBase Database · checked Sep 19, 2026
17	Ogisa Infraestructuras S.A	Indirect evidence	Zaragoza, SpainHQ checked Sep 19, 2026	51-200	22 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
18	Urbialba	Indirect evidence	Albacete, SpainHQ checked Sep 19, 2026	11-50	19 contacts →
	Indirect evidence “Urbialba constantemente busca la excelencia, especialistas en obras de edificación industrial y obra pública, nuestros trabajos realizados nos avalan.” Source: RevenueBase Database · checked Sep 19, 2026
19	Gilabert Miró S.A	Indirect evidence	Reus, SpainHQ checked Sep 19, 2026	51-200	19 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
20	Citracc Rail	Indirect evidence	Coslada, SpainHQ checked Sep 19, 2026	11-50	18 contacts →
	Indirect evidence “Somos una compañía especializada en ingeniería, fabricación, instalación y mantenimiento de infraestructuras críticas para los sectores ferroviario y energético.” Source: RevenueBase Database · checked Sep 19, 2026
21	Constructora Noray S.A	Indirect evidence	Reus, SpainHQ checked Sep 19, 2026	51-200	18 contacts →
	Indirect evidence “Empresa fundada en 1980, especializada en la construcción de obra civil industrial, orientada a dar respuesta y servicio a las actuales y futuras necesidades de nuestros clientes.” Source: RevenueBase Database · checked Sep 19, 2026
22	Comoli, S.L	Indirect evidence	Málaga, SpainHQ checked Sep 19, 2026	11-50	17 contacts →
	Indirect evidence “Empresa constructora en Málaga con más de 40 años de experiencia en la realización de proyectos.” Source: RevenueBase Database · checked Sep 19, 2026
23	Barcelona Engineering	Indirect evidence	Barcelona, SpainHQ checked Sep 19, 2026	11-50	16 contacts →
	Indirect evidence “At Barcelona Engineering, our passionate team specializes in designing underground infrastructure systems and delivering precise technical calculations that bring practical…” Source: RevenueBase Database · checked Sep 19, 2026
24	Site And Field Group	Partial evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	15 contacts →
	Partial evidence “Site & Field is a Spanish civil construction, building and industrial company that breaks traditional patterns.” Source: RevenueBase Database · checked Sep 19, 2026
25	Alonso LUZ Y GAS	Indirect evidence	Sariñena, SpainHQ checked Sep 19, 2026	51-200	14 contacts →
	Indirect evidence “Alonso Luz y Gas, especialistas en instalaciones de gas en pisos, casas y edificios.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: utility construction companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names utility construction companies.
Partial evidence: Its own public description names part of utility construction companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name utility construction companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 193 utility construction companies based in Spain

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Utility construction companies based in Spain at a glance

As of Sep 19, 2026

4.3%Verified-email coverage

32.1Average contacts per company

11-50Median size (employees)

11.4%Largest-city concentration · Madrid

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 193 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among utility construction companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Spain whose own description of what they do matches “utility construction companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names utility construction companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among utility construction companies, and records with no verified work email. Companies headquartered outside Spain are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 267 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names utility construction companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many utility construction companies are there based in Spain?

RevenueBase identified 193 utility construction companies headquartered in Spain as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Isolux Corsan, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most utility construction companies?

Madrid leads with 22 headquartered companies, followed by Barcelona (12) and Valencia (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 267 verified decision-maker contacts tracked across these 193 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.