Company lists · Data refreshed September 2026

Top 25 Retrofit consulting companies worldwide

Name: Retrofit consulting companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 11,283 companies tracked

RevenueBase identified 11,283 company matches for retrofit consulting companies worldwide as of September 2026 and tracks 90,407 professional contacts across them, including 31,500 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for retrofit consulting companies worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 29, 2026. Country and city lists for retrofit consulting companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 29, 2026 How this list was built

11,283Companies

90,407Contacts tracked

31,500Verified emails

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The 25 largest retrofit consulting companies worldwide

Ranked by team size

Top 25 of 11,283 company matches for retrofit consulting companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	OLA	Exact match	Austin, TX, United StatesHQ recorded Sep 29, 2026	n/a	1,145 contacts →
	Exact match “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2	BTP Consultants	Exact match	Montigny-le-bretonneux, FranceHQ recorded Sep 29, 2026	201-500	1,066 contacts →
	Exact match “BTP Consultants est un bureau de ̂, et présent à l'échelle nationale depuis plus de.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	Simpson Gumpertz & Heger SGH	Exact match	Waltham, MA, United StatesHQ recorded Sep 29, 2026	501-1,000	942 contacts →
	Exact match “Simpson Gumpertz & Heger (SGH) is a national engineering firm committed to delivering holistic advice for our clients’ most complex challenges.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4	Syska Hennessy Group	Exact match	New York, United StatesHQ recorded Sep 29, 2026	501-1,000	803 contacts →
	Exact match “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	Archetype Group	Exact match	Ho Chi Minh City, VietnamHQ recorded Sep 29, 2026	1,001-5,000	801 contacts →
	Exact match “Archetype Group is a leading international construction consultancy company, we are shaping buildings that last with a full range of consulting services: Architecture & Master…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	PAE	Exact match	Portland, OR, United StatesHQ recorded Sep 29, 2026	201-500	744 contacts →
	Exact match “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7	Bengt Dahlgren	Exact match	Stockholm, SwedenHQ recorded Sep 29, 2026	501-1,000	602 contacts →
	Exact match “Vi vill vara en föregångare i bygg- och fastighetsbranschen till effektiva, miljövänliga och motståndskraftiga fastigheter för människor att må bra i.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	EBI Consulting	Exact match	Burlington, MA, United StatesHQ recorded Sep 29, 2026	501-1,000	535 contacts →
	Exact match “For 35 years we have been helping investors, lenders, owners, developers, contractors, and property managers reduce risk and optimize their built facilities, infrastructure and…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	Nova Engineering And Environmental, LLC	Exact match	Kennesaw, GA, United StatesHQ recorded Sep 29, 2026	501-1,000	518 contacts →
	Exact match “Established in 1996, NOVA was originally founded to provide Environmental Consulting, Geotechnical Engineering, and Construction Materials Testing and Inspection services to the…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	RTM Engineering Consultants	Exact match	Schaumburg, IL, United StatesHQ recorded Sep 29, 2026	201-500	516 contacts →
	Exact match “We are an engineering firm that goes beyond a typical consulting role.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	Groupe Acceo BET Energie, Ascenseur, Environnement, AMO & MOE Spécialisées	Exact match	La Ciotat, FranceHQ recorded Sep 29, 2026	501-1,000	488 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	MBP Mcdonough Bolyard Peck	Exact match	Fairfax, VA, United StatesHQ recorded Sep 29, 2026	201-500	467 contacts →
	Exact match “MBP is a multi-disciplined consulting firm that provides a broad range of professional services designed to mitigate risk and optimize value within the built environment.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	JW Consultants LLP	Exact match	Pune, IndiaHQ recorded Sep 29, 2026	201-500	465 contacts →
	Exact match “JW Consultants LLP is among India's top Structural Consulting firms, providing services to architects, owners, contractors, and developers Since our establishment in 1975 as a…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	Sitelogiq	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 29, 2026	501-1,000	450 contacts →
	Exact match “SitelogIQ provides design, engineering, and construction management services that help organizations nationwide modernize their facilities and infrastructure.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	AEI Consultants	Exact match	Walnut Creek, CA, United StatesHQ recorded Sep 29, 2026	201-500	433 contacts →
	Exact match “AEI Consultants provides building, environmental, land and sustainability assessment and consulting services throughout North America.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	Semac Construction LTD	Exact match	Gurugram, IndiaHQ recorded Sep 29, 2026	51-200	422 contacts →
	Exact match “Semac was founded in 1969 as one of the first consultants in India to offer ASMEPF (Architectural, Structural, Mechanical, Electrical, Plumbing, Fire suppression, Air…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Deerns	Exact match	The Hague, NetherlandsHQ recorded Sep 29, 2026	501-1,000	405 contacts →
	Exact match “Deerns is an independent engineering firm specialised in providing technical consulting and engineering solutions with almost 500 staff members in offices around the globe.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	Arcxis	Exact match	Houston, TX, United StatesHQ recorded Sep 29, 2026	501-1,000	389 contacts →
	Exact match “ARCXIS (Formerly DPIS Builder Services), is the largest provider of HERS inspections, ENERGY STAR ratings, engineering and design, construction quality assurance and other builder…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	Glumac	Exact match	San Francisco, CA, United StatesHQ recorded Sep 29, 2026	201-500	386 contacts →
	Exact match “Glumac, a Tetra Tech Company, is a global leader in building engineering, committed to delivering a low carbon future for all.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	P2s	Exact match	Long Beach, CA, United StatesHQ recorded Sep 29, 2026	201-500	375 contacts →
	Exact match “P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	Wendel Companies	Exact match	Williamsville, NY, United StatesHQ recorded Sep 29, 2026	201-500	355 contacts →
	Exact match “Wendel is an Architecture, Engineering, Energy Efficiency, and Construction Management Firm that delivers customized solutions and turnkey projects in innovative ways.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	RDH Building Science	Exact match	Burnaby, BC, CanadaHQ recorded Sep 29, 2026	201-500	335 contacts →
	Exact match “RDH is a multidisciplinary consulting firm specializing in building performance, durability, and resilience.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	Cosentini Associates	Exact match	Nyc, NY, United StatesHQ recorded Sep 29, 2026	201-500	306 contacts →
	Exact match “Cosentini has a 70+ year history of engineering many of the world’s most iconic buildings.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	Bhavna Corp	Exact match	Noida, IndiaHQ recorded Sep 29, 2026	201-500	306 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	Jva, INC	Exact match	Boulder, CO, United StatesHQ recorded Sep 29, 2026	51-200	258 contacts →
	Exact match “JVA, Incorporated is an employee-owned consulting engineering firm with offices in Boulder, Fort Collins, Winter Park, Glenwood Springs, and Denver, Colorado.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “retrofit consulting companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 11,283 retrofit consulting companies worldwide

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Retrofit consulting companies worldwide at a glance

As of Sep 29, 2026

34.8%Verified-email coverage

8.0Average contacts per company

1-10Median size (employees)

1.1%Largest-city concentration · Sao Paulo

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

7,719

11-50

2,813

51-200

535

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for retrofit consulting companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “retrofit consulting companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 31,500 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Retrofit consulting companies by location

50 lists · largest first

Every Retrofit consulting companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “retrofit consulting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many retrofit consulting companies are there worldwide?

RevenueBase identified 11,283 company matches for retrofit consulting companies worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

OLA tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most retrofit consulting companies?

The United States leads with 2,673 companies, followed by France (1,013) and Germany (741). Every retrofit consulting companies list by country and city is linked on this page.

Which city has the most retrofit consulting companies?

Sao Paulo leads with 119 company records, followed by New York (118) and Paris (113).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 31,500 professional contacts with verified work emails tracked across these 11,283 companies; direct dials are available where recorded.

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 SmartSearch, 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.