Company lists · Data refreshed September 2026

Top 23 Green building consulting firms based in Hungary

RevenueBase identified 85 green building consulting firms headquartered in Hungary as of September 2026 and tracks 529 professional contacts across them, including 142 with verified work emails. Budapest is the largest hub.

This list covers green building consulting firms headquartered in Hungary, 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 28, 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 28, 2026 86% judged on-target in blind review
85Companies
529Contacts tracked
142Verified emails
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The 23 largest green building consulting firms based in Hungary

Ranked by team size
Top 23 of 85 green building consulting firms based in Hungary, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to green building consulting firms: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceBudapest, HungaryHQ checked Sep 28, 2026201-500138 contacts →

Indirect evidence

“More than 35 years of engineering experience, extensive professional knowledge, service excellence, cost efficiency, reliability and dynamism – this is Óbuda Group.”

Source: RevenueBase Database · checked Sep 28, 2026
2Partial evidenceBudapest, HungaryHQ checked Sep 28, 202651-20052 contacts →

Partial evidence

“Körös Consult is one of Hungary’s leading building services design consultancy practices.”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceBudapest, HungaryHQ checked Sep 28, 202651-20027 contacts →

Indirect evidence

“Paulinyi & Partners is one of Hungary’s leading engineering and architectural groups, with over 35 years of experience in sustainable, future-oriented design.”

Source: RevenueBase Database · checked Sep 28, 2026
4Partial evidenceBudapest, HungaryHQ checked Sep 28, 202611-5027 contacts →

Partial evidence

“Greenbors Consulting is an independent private consultancy service company focusing on sustainable business solutions.”

Source: RevenueBase Database · checked Sep 28, 2026
5Indirect evidenceBudapest, HungaryHQ checked Sep 28, 202611-5027 contacts →

Indirect evidence

“Realiscon is an independent real estate development services company providing professional support for real estate and infrastructure projects across a wide range of asset…”

Source: RevenueBase Database · checked Sep 28, 2026
6Partial evidenceBudapest, HungaryHQ checked Sep 28, 202611-5026 contacts →

Partial evidence

“Advanced Building & Urban Design (ABUD) is consultancy firm powered by engineers, architects and researchers specialised in sustainable building and urban design.”

Source: RevenueBase Database · checked Sep 28, 2026
7Indirect evidenceBudapest, HungaryHQ checked Sep 28, 202611-5011 contacts →

Indirect evidence

“We are NOVU: Budapest-based architects and engineers shaping resilient, future-ready environments.”

Source: RevenueBase Database · checked Sep 28, 2026
8Indirect evidenceBudapest, HungaryHQ checked Sep 28, 20261-1010 contacts →

Indirect evidence

“Tanácsadóként a környezeti és társadalmi fenntarthatóság, valamint a körforgásos gazdaság szemléletével támogatjuk partnereinket az üzleti fejlődésben.”

Source: RevenueBase Database · checked Sep 28, 2026
9Indirect evidenceBudapest, HungaryHQ checked Sep 28, 202611-5010 contacts →

Indirect evidence

“PANDA energiamenedzsment szoftver - Nagyvállalati energia audit - Energetikai szakreferens - Energetikai beruházások TAO kedvezménye - Energetikai tanúsítvány Teljes körű…”

Source: RevenueBase Database · checked Sep 28, 2026
10Indirect evidenceBudapest, HungaryHQ checked Sep 28, 202611-5010 contacts →

Indirect evidence

“Közel 10 éves tapasztalattal az Enco Europe Kft.”

Source: RevenueBase Database · checked Sep 28, 2026
11Indirect evidenceBudapest, HungaryHQ checked Sep 28, 202611-509 contacts →

Indirect evidence

“TIBA Architects Studio, established in 2005, is based in Budapest, Hungary.”

Source: RevenueBase Database · checked Sep 28, 2026
12Partial evidence1082 Budapest, HungaryHQ checked Sep 28, 20261-107 contacts →

Partial evidence

“The leading European consulting, planning and project management enterprise, Drees & Sommer has supported private and public clients and investors for 50 years in all aspects of…”

Source: RevenueBase Database · checked Sep 28, 2026
13Indirect evidenceBudapest, HungaryHQ checked Sep 28, 20261-106 contacts →

Indirect evidence

“Our target: sustainability.”

Source: RevenueBase Database · checked Sep 28, 2026
14Partial evidenceSzeged, HungaryHQ checked Sep 28, 202611-505 contacts →

Partial evidence

“Ventosus: Leading the Future of Building Services and Energy in Hungary, and beyond.”

Source: RevenueBase Database · checked Sep 28, 2026
15Indirect evidenceBudapest, HungaryHQ checked Sep 28, 20261-104 contacts →

Indirect evidence

“We believe the transition to a sustainable energy system is inevitable for the future of humanity in the long run.”

Source: RevenueBase Database · checked Sep 28, 2026
16Partial evidenceBudapest, HungaryHQ checked Sep 28, 202611-503 contacts →

Partial evidence

“Az MBH Consultingnál hiszünk a változások és a megújulás erejében.”

Source: RevenueBase Database · checked Sep 28, 2026
17Indirect evidenceTörökbálint, HungaryHQ checked Sep 28, 20261-103 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
18Indirect evidenceBudaörs, HungaryHQ checked Sep 28, 202611-502 contacts →

Indirect evidence

“Mit csinálunk?”

Source: RevenueBase Database · checked Sep 28, 2026
19Indirect evidenceBudapest, HungaryHQ checked Sep 28, 20261-102 contacts →

Indirect evidence

“Hiszünk a fenntarthatóságban és hiszünk abban, hogy a magyar vállalatok felé támasztott fenntarthatósági és azon belül az energiahatékonysági követelmények lehetőséget jelentenek…”

Source: RevenueBase Database · checked Sep 28, 2026
20Indirect evidenceBudapest, HungaryHQ checked Sep 28, 20261-102 contacts →

Indirect evidence

“The mission of our company is to facilitate the economic transformation in an environmentally friendly manner by providing consultancy services in the field of sustainable…”

Source: RevenueBase Database · checked Sep 28, 2026
21Indirect evidenceBudapest, HungaryHQ checked Sep 28, 20261-102 contacts →

Indirect evidence

“We are a successfully expanding consultancy with over 16 years of experience in managing environmental-related projects with the support of experienced experts covering the fields…”

Source: RevenueBase Database · checked Sep 28, 2026
22Indirect evidenceBudapest, HungaryHQ checked Sep 28, 20261-101 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
23Indirect evidenceBudapest, HungaryHQ checked Sep 28, 20261-101 contacts →

Indirect evidence

“ML2S is a company founded in 2016 to reflect the emerging need of environmental responsibility and sustainability in the field of real estate.”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 23 of 85 green building consulting firms based in Hungary

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Green building consulting firms based in Hungary at a glance

As of Sep 28, 2026
26.8%Verified-email coverage
6.2Average contacts per company
1-10Median size (employees)
44.7%Largest-city concentration · Budapest
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
58
11-50
23
51-200
3
201-500
1

Email recency for this list is measured worldwide rather than for Hungary, so it is reported there. Company counts and contact totals on this page are exact for Hungary, over 85 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 green building consulting firms, 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 Hungary whose own description of what they do matches “green building consulting firms”. 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 green building consulting firms), 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 green building consulting firms, and records with no verified work email. Companies headquartered outside Hungary 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, 142 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 28, 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.

Green building consulting firms 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 green building consulting firms, 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 green building consulting firms are there based in Hungary?

RevenueBase identified 85 green building consulting firms headquartered in Hungary 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?

Óbuda Group, headquartered in Hungary, tops this list with the largest team on record.

Which city has the most green building consulting firms?

Budapest leads with 38 headquartered companies, followed by Szeged (4) and Debrecen (3).

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 142 verified decision-maker contacts tracked across these 85 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 28, 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.