Company lists · Data refreshed September 2026
Top 25 Retrofit consultants based in France
RevenueBase identified 1,927 retrofit consultants headquartered in France as of September 2026 and tracks 17,888 professional contacts across them, including 5,728 with verified work emails. Paris is the largest hub.
This list covers retrofit consultants headquartered in France, 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 29, 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 retrofit consultants based in France
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,066 contacts → | ||||
Partial evidence “BTP Consultants est un bureau de ̂, et présent à l'échelle nationale depuis plus de.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 643 contacts → | ||||
Indirect evidence “Groupe international d’Ingénierie & Réalisation, spécialisé dans les bâtiments complexes, nous assurons principalement des missions clés en main sur des projets de construction…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 488 contacts → | ||||
Indirect evidence “ACCEO est un bureau d’études en bâtiment indépendant fondé en 2003 et spécialisé dans des domaines à forte technicité : Ascenseurs, Efficacité énergétique, Environnement, AMO et…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 345 contacts → | ||||
Indirect evidence “LUSEO is a multidisciplinary building design firm that provides highly specialized engineering and project administration services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 170 contacts → | ||||
Indirect evidence “GROUPE PROJEX spécialiste de l'ingénierie tous corps d'état en maîtrise d’œuvre de conception, d'exécution et d'exploitation.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 139 contacts → | ||||
Indirect evidence “Sénova est "le partenaire de la rénovation énergétique de votre habitat".” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 98 contacts → | ||||
Indirect evidence “CDC Conseil est une entreprise qui propose - Aux gestionnaires de patrimoines immobiliers des prestations de conseil de suivi d’exploitation, d’achat d’énergie et des solutions…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 93 contacts → | ||||
Indirect evidence “Avez-vous besoin d'aide pour améliorer les performances énergétiques de vos bâtiments?” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 92 contacts → | ||||
Indirect evidence “Société à taille humaine, BTP Ingénierie est un bureau d’étude spécialisé dans le domaine du calcul de structures et du diagnostic des structures existantes.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 89 contacts → | ||||
Indirect evidence “Myrium est un opérateur indépendant de référence au service de la performance durable des bâtiments.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 87 contacts → | ||||
Indirect evidence “Crée en 1993, TERAO est un pionner de l’immobilier durable, fort d’une équipe pluridisciplinaire d’une quarantaine d’ingénieurs, présent en France et à l’international.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 85 contacts → | ||||
Indirect evidence “Le Groupe NERCO conseille et accompagne Investisseurs, Foncières, Assets managers, Property managers et Utilisateurs à tous les stades de leurs projets de rénovation…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 81 contacts → | ||||
Indirect evidence “ALTO Ingénierie est un bureau d'étude Fluides et Environnement, qui intervient en MOE et AMO, mais également en Direction de Synthèse et BIM Management.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 76 contacts → | ||||
Indirect evidence “3iA est un bureau d'ingénierie du bâtiment ayant les compétences en structure, fluides/thermique, VRD, économie de la construction, sismique, BIM” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 74 contacts → | ||||
Indirect evidence “Actuellement composée de 24 collaborateur·trices, la société RBI apporte son expertise technique auprès des maîtres d'ouvrage et des architectes.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 73 contacts → | ||||
Indirect evidence “Akila Ingénierie est un bureau d'études en ingénierie du bâtiment à taille humaine et proche de ses clients.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 72 contacts → | ||||
Indirect evidence “SECC, Société Experte en Conseils dans le domaine du Clos Couvert est un Bureau d’Etudes Techniques spécialisé en COUVERTURE, ETANCHEITE, STRUCTURE, FAÇADE, PAROIS ENTERREES et la…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 72 contacts → | ||||
Indirect evidence “Solares Bauen est un bureau d’étude fluides, thermique et environnement dans le bâtiment créée en 2005 à Strasbourg.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 70 contacts → | ||||
Indirect evidence “SYNAPSE Construction, société d'ingénierie bureau d'études techniques (BET) dans les métiers du bâtiment, répond aux besoins des donneurs d'ordres publics et privés.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 67 contacts → | ||||
Indirect evidence “Depuis plus de 10 ans nous intervenons sur l’ensemble des métiers de l’ingénierie des structures neuves et existantes en maîtrise d’œuvre, exécution, instrumentation et diagnostic…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 65 contacts → | ||||
Indirect evidence “ODETEC – Ingénierie Technique et Environnementale Bureaux à Bordeaux, Paris, Périgueux, Rennes, Agen, Brive Depuis 2007, ODETEC conçoit et pilote des projets de construction et de…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 65 contacts → | ||||
Indirect evidence “Reanova est une entreprise de services spécialisée dans la rénovation globale des copropriétés.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 63 contacts → | ||||
Indirect evidence “DIADES est la société du groupe SETEC spécialisée dans le diagnostic des structures et a pour missions principales - l’ingénierie du diagnostic, de la maintenance, les études de…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 62 contacts → | ||||
Indirect evidence “ERESE | Groupe SCET HTC est un bureau d’études spécialisé dans les énergies, les réseaux et l’environnement.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 62 contacts → | ||||
Indirect evidence “Arcora est un bureau d’études, filiale du groupe Ingérop, spécialisé dans les structures métalliques, façades, verrières et ouvrages complexes.” Source: RevenueBase Database · checked Sep 29, 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: retrofit consultants. 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 retrofit consultants.
- Partial evidence
- Its own public description names part of retrofit consultants, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name retrofit consultants. 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 1,927 retrofit consultants based in France
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Retrofit consultants based in France at a glance
As of Sep 29, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for France, so it is reported there. Company counts and contact totals on this page are exact for France, over 1,927 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 retrofit consultants, 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 France whose own description of what they do matches “retrofit consultants”. 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 retrofit consultants), 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 retrofit consultants, and records with no verified work email. Companies headquartered outside France 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, 5,728 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 29, 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.
Retrofit consultants by metro
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 retrofit consultants, 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 retrofit consultants are there based in France?
RevenueBase identified 1,927 retrofit consultants headquartered in France 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?
BTP Consultants, headquartered in Montigny-Le-Bretonneux, tops this list with the largest team on record.
Which city has the most retrofit consultants?
Paris leads with 200 headquartered companies, followed by Lyon (50) and Toulouse (40).
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 5,728 verified decision-maker contacts tracked across these 1,927 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 29, 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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