Company lists · Data refreshed September 2026

Top 25 Sustainable design consultants based in Johannesburg, South Africa

Name: Sustainable design consultants based in Johannesburg, South Africa
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 88 companies tracked

RevenueBase identified 88 sustainable design consultants headquartered in Johannesburg, South Africa as of September 2026 and tracks 797 professional contacts across them, including 394 with verified work emails. Johannesburg is the largest hub.

This list covers sustainable design consultants headquartered in Johannesburg, South Africa, 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 22, 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 22, 2026 86% judged on-target in blind review

88Companies

797Contacts tracked

394Verified emails

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The 25 largest sustainable design consultants based in Johannesburg, South Africa

Ranked by team size

Top 25 of 88 sustainable design consultants based in Johannesburg, South Africa, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to sustainable design consultants: 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	Jones & Wagener PTY LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	51-200	228 contacts →
	Indirect evidence “Jones & Wagener is a specialist firm of consulting engineers and scientists based in South Africa.” Source: RevenueBase Database · checked Sep 22, 2026
2	Siyakha Consulting	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	51-200	90 contacts →
	Partial evidence “We are a niche firm that drives investment, commercial excellence, developmental strategies, and sustainability.” Source: RevenueBase Database · checked Sep 22, 2026
3	Tcrpv Architects	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	39 contacts →
	Partial evidence “TCRPV Architects is a professional South African based design firm.” Source: RevenueBase Database · checked Sep 22, 2026
4	Synergy Global Consulting LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	37 contacts →
	Indirect evidence “Synergy Global Consulting Ltd (Synergy) is an independent international consulting company that works with natural resource and infrastructure sectors operating in challenging…” Source: RevenueBase Database · checked Sep 22, 2026
5	Solid Green	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	36 contacts →
	Partial evidence “Solid Green Consulting is a young and energetic company enthusiastic about advancing sustainability in the built environment.” Source: RevenueBase Database · checked Sep 22, 2026
6	Voltas Technologies South Africa	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	25 contacts →
	Indirect evidence “A transversal vision, due to the diversity of our product offering, enables VOLTAS Technologies to propose innovative integrated solutions for your projects, leading to…” Source: RevenueBase Database · checked Sep 22, 2026
7	Themba Consultants	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	24 contacts →
	Indirect evidence “At Themba we provide professional consulting services in infrastructure development.” Source: RevenueBase Database · checked Sep 22, 2026
8	Savannah Environmental PTY LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	21 contacts →
	Indirect evidence “Through undertaking a broad range of environmental studies, Savannah Environmental has gained extensive experience with regards to environmental legislation requirements and…” Source: RevenueBase Database · checked Sep 22, 2026
9	Brundtland Consulting	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	19 contacts →
	Indirect evidence “Brundtland Consulting is a South African management consulting firm specialized in climate change, green economy and renewable energy.” Source: RevenueBase Database · checked Sep 22, 2026
10	Environmental Impact Management Services PTY LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	15 contacts →
	Indirect evidence “Environmental Impact Management Services (Pty) Ltd (EIMS) was founded in 1993 and has steadily grown to be a significant player in the environmental management consulting industry…” Source: RevenueBase Database · checked Sep 22, 2026
11	Nsovo Environmental Consulting	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	13 contacts →
	Indirect evidence “Our specialist area of focus is the assessment of multifaceted projects, including the establishment of linear developments, bulk infrastructure, power generation and…” Source: RevenueBase Database · checked Sep 22, 2026
12	Ep3 Environmental	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	12 contacts →
	Partial evidence “EP3 Environmental (Pty) Ltd was established by Eben van Schalkwyk in 2013 and is a multi-disciplinary consulting firm that provides Environmental and Sustainability consulting…” Source: RevenueBase Database · checked Sep 22, 2026
13	Daffonchio Architects	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	10 contacts →
	Partial evidence “We are at the forefront of sustainable architecture in Africa.” Source: RevenueBase Database · checked Sep 22, 2026
14	Sydwalt PTY LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	10 contacts →
	Indirect evidence “SYDWALT (Pty) Ltd is an independent engineering Consulting firm, offering a broad range of professional services.” Source: RevenueBase Database · checked Sep 22, 2026
15	Delta Carbon	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	9 contacts →
	Indirect evidence “Delta Carbon is an integrated energy services and decarbonisation advisory company.” Source: RevenueBase Database · checked Sep 22, 2026
16	TCH Group	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	9 contacts →
	Partial evidence “At TCH Group, we're on a mission to create a brighter, more sustainable future through innovative solutions.” Source: RevenueBase Database · checked Sep 22, 2026
17	Watson Consulting Engineers PTY LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	7 contacts →
	Indirect evidence “Engineering Excellence Our cutting-edge projects are carried out by a team of talented engineers who want to transform our communities.” Source: RevenueBase Database · checked Sep 22, 2026
18	Klad Studios PTY LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	5 contacts →
	Indirect evidence “Residential, Retail, and Commercial Architects Specialist Consulting Architects Based in Johannesburg” Source: RevenueBase Database · checked Sep 22, 2026
19	Mamadi And Company SA	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	5 contacts →
	Partial evidence “Mamadi and Company is a leading professional services firm offering superlative consulting services in planning, design, engineering, project management, construction management…” Source: RevenueBase Database · checked Sep 22, 2026
20	Elizabeth Kent Consulting	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	5 contacts →
	Partial evidence “Elizabeth Kent Consulting is a writing, communications and reporting firm with a sustainability specialism.” Source: RevenueBase Database · checked Sep 22, 2026
21	Greenfield Sustainable Group	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	5 contacts →
	Indirect evidence “Greenfield denotes pristine resources with untapped potential, operating at peak capacity.” Source: RevenueBase Database · checked Sep 22, 2026
22	Frontend Factory	Strong evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	4 contacts →
	Strong evidence “Who We Are: Frontend Factory is a boutique consultancy providing specialist design and project services within the manufacturing and light industrial sectors.” Source: RevenueBase Database · checked Sep 22, 2026
23	Isago Architecture	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	4 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
24	VMG Consultants	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	4 contacts →
	Partial evidence “VMG Consultants have been awarded Mechanical Engineering Consulting company of the year, two years running.” Source: RevenueBase Database · checked Sep 22, 2026
25	Nicholas Plewman Architecture	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	4 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 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: sustainable design 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 sustainable design consultants.
Partial evidence: Its own public description names part of sustainable design consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable design 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 88 sustainable design consultants based in Johannesburg, South Africa

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Sustainable design consultants based in Johannesburg, South Africa at a glance

As of Sep 22, 2026

49.4%Verified-email coverage

9.1Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · Johannesburg

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole South Africa list rather than for Johannesburg, so it is reported there. Company counts and contact totals on this page are exact for Johannesburg, over 88 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 sustainable design 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 Johannesburg, South Africa whose own description of what they do matches “sustainable design 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 sustainable design 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 sustainable design consultants, and records with no verified work email. Companies headquartered outside Johannesburg 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, 394 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 22, 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.

Sustainable design consultants by metro in South Africa

Sustainable design consultants in Johannesburg88
Sustainable design consultants in Cape Town74
Sustainable design consultants in Pretoria52

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 sustainable design 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 sustainable design consultants are there based in Johannesburg, South Africa?

RevenueBase identified 88 sustainable design consultants headquartered in Johannesburg, South Africa 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?

Jones & Wagener PTY LTD, headquartered in Johannesburg, tops this list with the largest team on record.

Which city has the most sustainable design consultants?

Johannesburg leads with 88 headquartered companies, followed by Cape Town (74) and Pretoria (52).

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 394 verified decision-maker contacts tracked across these 88 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 22, 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.