Company lists · Data refreshed September 2026
Top 25 Carbon neutral contractors based in Madrid, Spain
RevenueBase identified 298 carbon neutral contractors headquartered in Madrid, Spain as of September 2026 and tracks 5,484 professional contacts across them, including 490 with verified work emails. Madrid is the largest hub.
This list covers carbon neutral contractors headquartered in Madrid, 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 16, 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.
The 25 largest carbon neutral contractors based in Madrid, Spain
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 439 contacts → | ||||
Indirect evidence “We’re an Engineering and Consulting company with more than 35 years of experience and a diverse range of services in the Building, Infrastructure, Energy and Industry, Environment…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 2 | 298 contacts → | ||||
Indirect evidence “SÓLIDA, a Bureau Veritas Company, is an independent company founded in 2007 that provides high added-value engineering and consulting services within the renewable energy sector.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 3 | 268 contacts → | ||||
Indirect evidence “Desde 1970 ESTEYCO ha desarrollado internacionalmente más de 1.300 estudios y proyectos.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 4 | 179 contacts → | ||||
Indirect evidence “Fundada en 1988, Proyectos, Ejecución y Control de Obras S.A.(PROYECO) ofrece desde hace más de 35 años servicios de Consultoría, Asesoramiento y Project Management brindando…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 5 | 154 contacts → | ||||
Indirect evidence “Construcía S.L, company specializing in infrastructure development for businesses Our strategy as a company is based on an integrated service offering which combines solutions for…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 6 | 152 contacts → | ||||
Indirect evidence “MAI has been in international consultancy for over 25 years driving energy and environmental project around the world, helping to design and plan reliable supply systems based on…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 7 | 135 contacts → | ||||
Indirect evidence “TASH | Taller de Arquitectura Sánchez-Horneros es un estudio de arquitectura e ingeniería de edificación nacido en Toledo, con más de 20 años de trayectoria y presencia…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 8 | 131 contacts → | ||||
Indirect evidence “Within VALLADARES_ing, engineering challenges are part of our everyday" Global engineering and sustainable buildings Applying our vast experience we strive to provide our clients…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 9 | 109 contacts → | ||||
Indirect evidence “HEYMO es una empresa de servicios profesionales de ingeniería y consultoría que cuenta con 60 años de experiencia nacional e internacional.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 10 | 61 contacts → | ||||
Indirect evidence “SferaOne, parte del Grupo Diggia, es una empresa que realiza actividades de proyección global desde 2002, especializada en la transición Energética desarrollando trabajos de…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 11 | 48 contacts → | ||||
Indirect evidence “At Ineria Management, we help Real Estate and Infrastructure companies integrate sustainability and decarbonization into their projects, creating value through ESG.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 12 | 47 contacts → | ||||
Indirect evidence “Somos una empresa constructora formada por un equipo de profesionales del sector de la construcción, la ingeniería y la arquitectura con más de 30 años de experiencia en el Sector.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 13 | 46 contacts → | ||||
Indirect evidence “Transcendent es una consultora estratégica de Impacto y sostenibilidad.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 14 | 44 contacts → | ||||
Indirect evidence “With offices in Madrid, Lisbon, Shanghai, Ho Chi Minh City and Miami, Ortiz Leon Architects is one of Europe’s preeminent architecture firms, providing architecture, interior…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 15 | 29 contacts → | ||||
Indirect evidence “Somos un socio de confianza estratégico para nuestros clientes.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 16 | 27 contacts → | ||||
Indirect evidence “Zumain Ingenieros, inicia su andadura en el año 2002, con la intención de desarrollar su trabajo en el sector de los estudios y proyectos ambientales, con el objetivo de dar un…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 17 | 23 contacts → | ||||
Indirect evidence “Creamos y gestionamos soluciones y servicios de instalaciones que contribuyen de manera eficiente y sostenible al bienestar de la sociedad, fomentando el desarrollo económico y…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 18 | 23 contacts → | ||||
Indirect evidence “Ingreen Innovación S.L.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 19 | 18 contacts → | ||||
Indirect evidence “INDEPENDENT CONSULTING ENGINEERING - CONSULTING & ADVICE ON INTERNATIONAL TENDERS - PROJECT & CONSTRUCTION MANAGEMENT ORFISA is a independent consulting engineering.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 20 | 15 contacts → | ||||
Indirect evidence “Arthko Project es una empresa de consultoría, project management, proyectos y dirección de obras.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 21 | 13 contacts → | ||||
Indirect evidence “ARDITECNICA is a company established in as part of the German group Bayerische Hausbau, created for the planning and control of the execution of the projects that the group…” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 22 | 13 contacts → | ||||
Indirect evidence “Estudio de arquitectura, diseño e ingeniería, diseñamos y construimos espacio.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 23 | 12 contacts → | ||||
Indirect evidence “We are a strategic consulting firm, specialized in Sustainability.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 24 | 12 contacts → | ||||
Indirect evidence “R.” Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
| 25 | 12 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026Thanks. The Data Team will review it. | |||||
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: carbon neutral contractors. 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 carbon neutral contractors.
- Partial evidence
- Its own public description names part of carbon neutral contractors, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name carbon neutral contractors. 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 298 carbon neutral contractors based in Madrid, Spain
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Carbon neutral contractors based in Madrid, Spain at a glance
As of Sep 16, 2026Companies by employee count
Email recency for this list is measured across the whole Spain list rather than for Madrid, so it is reported there. Company counts and contact totals on this page are exact for Madrid, over 298 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 carbon neutral contractors, 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 Madrid, Spain whose own description of what they do matches “carbon neutral contractors”. 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 carbon neutral contractors), 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 carbon neutral contractors, and records with no verified work email. Companies headquartered outside Madrid 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, 490 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 16, 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.
Carbon neutral contractors by metro in Spain
- Carbon neutral contractors in Madrid298
- Carbon neutral contractors in Barcelona193
- Carbon neutral contractors in Valencia72
- Carbon neutral contractors in Sevilla51
- Carbon neutral contractors in Zaragoza37
- Carbon neutral contractors in Malaga36
- Carbon neutral contractors in Murcia32
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 carbon neutral contractors, 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 carbon neutral contractors are there based in Madrid, Spain?
RevenueBase identified 298 carbon neutral contractors headquartered in Madrid, 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?
Incosa, headquartered in Madrid, tops this list with the largest team on record.
Which city has the most carbon neutral contractors?
Madrid leads with 298 headquartered companies, followed by Barcelona (193) and Valencia (72).
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 490 verified decision-maker contacts tracked across these 298 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 16, 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.
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