Company lists · Data refreshed September 2026

Top 25 Sustainable design firms based in South Africa

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

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 436 companies tracked

RevenueBase identified 436 sustainable design firms headquartered in South Africa as of September 2026 and tracks 3,260 professional contacts across them, including 947 with verified work emails. Johannesburg is the largest hub.

This list covers sustainable design firms headquartered in 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

436Companies

3,260Contacts tracked

947Verified emails

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The 25 largest sustainable design firms based in South Africa

Ranked by team size

Top 25 of 436 sustainable design firms based in 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 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	JG Afrika PTY LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	201-500	221 contacts →
	Indirect evidence “JG Afrika, a leading multi-disciplinary engineering and environmental consultancy in South Africa, provides civil and structural engineering and environmental consulting services…” Source: RevenueBase Database · checked Sep 22, 2026
2	Bentel Associates International PTY LTD	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	201-500	174 contacts →
	Partial evidence “Bentel Associates International (BAI) was founded in 1960 with the desire to create innovative and practical designs that ensure attractive public environments and achieve…” Source: RevenueBase Database · checked Sep 22, 2026
3	Ncc-Group PTY LTD	Partial evidence	Cape Town, South AfricaHQ checked Sep 22, 2026	201-500	120 contacts →
	Partial evidence “Established in South Africa in 2003, NCC-Group delivers specialist consulting and implementation services designed to meet the unique needs of each project – both locally and…” Source: RevenueBase Database · checked Sep 22, 2026
4	Romh Consulting	Indirect evidence	City Of Tshwane, South AfricaHQ checked Sep 22, 2026	51-200	106 contacts →
	Indirect evidence “We are a team of Professional Engineers, Technical specialists and Project Managers organised to provide specialized consulting and management services within the Engineering and…” Source: RevenueBase Database · checked Sep 22, 2026
5	Osmond Lange Architects	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	51-200	84 contacts →
	Partial evidence “Osmond Lange blends architecture, urban design and development management skills to deliver an integrated package of professional services to its clients.” Source: RevenueBase Database · checked Sep 22, 2026
6	Paragon Group	Partial evidence	Illovo, South AfricaHQ checked Sep 22, 2026	51-200	70 contacts →
	Partial evidence “Paragon: Architecture and Interior Architecture was established in October 1997, and is an internationally-active African broad based design business, based in Johannesburg.” Source: RevenueBase Database · checked Sep 22, 2026
7	ECO Elementum	Indirect evidence	City Of Tshwane, South AfricaHQ checked Sep 22, 2026	51-200	68 contacts →
	Indirect evidence “Established in 2013, Eco Elementum is a leading environmental and engineering consultancy.” Source: RevenueBase Database · checked Sep 22, 2026
8	R&l Architects	Indirect evidence	Cape Town, South AfricaHQ checked Sep 22, 2026	11-50	54 contacts →
	Indirect evidence “R&L Architects (Pty) Ltd was founded by Douglas Roberts in 1964.” Source: RevenueBase Database · checked Sep 22, 2026
9	Terramanzi Group	Indirect evidence	Cape Town, South AfricaHQ checked Sep 22, 2026	11-50	49 contacts →
	Indirect evidence “Terramanzi Group is a leading Cape Town based multi-disciplinary environmental firm.” Source: RevenueBase Database · checked Sep 22, 2026
10	KMH Architects	Indirect evidence	Cape Town, South AfricaHQ checked Sep 22, 2026	51-200	47 contacts →
	Indirect evidence “KMH Architects was established in Cape Town, South Africa, in 1912 by John Perry, FRIBA.” Source: RevenueBase Database · checked Sep 22, 2026
11	Tenthouse Structures	Indirect evidence	Cape Town, South AfricaHQ checked Sep 22, 2026	11-50	41 contacts →
	Indirect evidence “Tenthouse Structures is a full-service specialist contractor for the hospitality industry.” Source: RevenueBase Database · checked Sep 22, 2026
12	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
13	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
14	Zitholele Consulting	Indirect evidence	Midrand, South AfricaHQ checked Sep 22, 2026	11-50	33 contacts →
	Indirect evidence “ZITHOLELE CONSULTING, offers Specialist Consulting Services in the fields of Engineering, Environmental Management, Waste Management and Strategic Communication.” Source: RevenueBase Database · checked Sep 22, 2026
15	MLB Architects PTY LTD	Indirect evidence	Cape Town, South AfricaHQ checked Sep 22, 2026	11-50	32 contacts →
	Indirect evidence “Established in 1987, MLB Architects has garnered a distinguished reputation over its 36-year history for cultivating a well-resourced and adept professional team, characterised by…” Source: RevenueBase Database · checked Sep 22, 2026
16	Groundtruth	Indirect evidence	Hilton, South AfricaHQ checked Sep 22, 2026	11-50	32 contacts →
	Indirect evidence “An award-winning multidisciplinary consulting company with over 20 years experience in water, biodiversity, and engineering across aquatic and terrestrial ecosystems.” Source: RevenueBase Database · checked Sep 22, 2026
17	Leafyspace	Indirect evidence	Kempton Park, South AfricaHQ checked Sep 22, 2026	11-50	31 contacts →
	Indirect evidence “LeafySpace (Pty) Ltd was established in 2010, and have branches located in Gauteng, Cape Town, Durban, Limpopo, and Eastern Cape.” Source: RevenueBase Database · checked Sep 22, 2026
18	Nico VAN DER Meulen Architects	Partial evidence	Randburg, South AfricaHQ checked Sep 22, 2026	11-50	30 contacts →
	Partial evidence “One of South Africa's leading architectural practices, Nico van der Meulen Architects designs upmarket residences and commercial developments for discerning clients worldwide.” Source: RevenueBase Database · checked Sep 22, 2026
19	Tv3 Architects I Town Planners I Urban Designers	Indirect evidence	Stellenbosch, South AfricaHQ checked Sep 22, 2026	11-50	27 contacts →
	Indirect evidence “Our mission is to sustain a successful, professional practice through the application of PROFESSIONAL EXPERTISE SERVICE EXCELLENCE PROFESSIONAL ETHICS SOUND BUSINESS PRACTICE For…” Source: RevenueBase Database · checked Sep 22, 2026
20	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
21	Triviron Project Management PTY LTD	Indirect evidence	Midrand, South AfricaHQ checked Sep 22, 2026	11-50	20 contacts →
	Indirect evidence “Triviron Project Management (Pty) Ltd is a consultant within the built environment with skills and expertise in Development Management, Engineering Consulting, Construction…” Source: RevenueBase Database · checked Sep 22, 2026
22	The Creative Axis Architects	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	19 contacts →
	Partial evidence “The Creative Axis' Architects brings together a wealth of creative and commercial talent in a union that is rare in the architectural design profession, creating a leading African…” Source: RevenueBase Database · checked Sep 22, 2026
23	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
24	Kongiwe	Indirect evidence	Bryanston, South AfricaHQ checked Sep 22, 2026	11-50	19 contacts →
	Indirect evidence “Founded in 2016, Kongiwe is a contemporary consultancy with the purpose ‘To solve environmental and social challenges by providing expert bespoke solutions that promote current…” Source: RevenueBase Database · checked Sep 22, 2026
25	Ecolution Consulting	Partial evidence	Cape Town, South AfricaHQ checked Sep 22, 2026	11-50	17 contacts →
	Partial evidence “Ecolution Consulting is a green building consultancy demonstrating that responsible design is the most practical and efficient way to build for the future.” 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 firms. 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 firms.
Partial evidence: Its own public description names part of sustainable design firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainable design firms. 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 436 sustainable design firms based in South Africa

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Sustainable design firms based in South Africa at a glance

As of Sep 22, 2026

29.0%Verified-email coverage

7.5Average contacts per company

1-10Median size (employees)

16.3%Largest-city concentration · Johannesburg

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

320

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for South Africa, so it is reported there. Company counts and contact totals on this page are exact for South Africa, over 436 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 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 South Africa whose own description of what they do matches “sustainable design 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 sustainable design 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 sustainable design firms, and records with no verified work email. Companies headquartered outside South Africa 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, 947 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 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 sustainable design 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 sustainable design firms are there based in South Africa?

RevenueBase identified 436 sustainable design firms headquartered in 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?

JG Afrika PTY LTD, headquartered in Johannesburg, tops this list with the largest team on record.

Which city has the most sustainable design firms?

Johannesburg leads with 71 headquartered companies, followed by Cape Town (68) and Pretoria (49).

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 947 verified decision-maker contacts tracked across these 436 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.