Company lists · Data refreshed September 2026

Top 25 Sustainable design firms based in Johannesburg, South Africa

Name: Sustainable design firms 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 71 companies tracked

RevenueBase identified 71 sustainable design firms headquartered in Johannesburg, South Africa as of September 2026 and tracks 1,035 professional contacts across them, including 309 with verified work emails. Johannesburg is the largest hub.

This list covers sustainable design firms 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

71Companies

1,035Contacts tracked

309Verified emails

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

Ranked by team size

Top 25 of 71 sustainable design firms 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 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	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
4	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
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	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
7	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
8	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
9	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
10	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
11	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
12	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
13	E2 Architects Urban Designers	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	9 contacts →
	Partial evidence “E2 Architects \| Urban Designers is a small team of energetic, very enthusiastic and talented individuals based in Linden, Johannesburg.” Source: RevenueBase Database · checked Sep 22, 2026
14	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
15	AOJ Architecture & Interiors	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	6 contacts →
	Partial evidence “AOJ is a progressive Johannesburg based commercial architecture and interior design practice, formally established in 2009.” Source: RevenueBase Database · checked Sep 22, 2026
16	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
17	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
18	Newtown Landscape Architects	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	5 contacts →
	Partial evidence “PHILOSOPHY: Newtown Landscape Architects strives for sustainable environments that have cultural, artistic and ecological merit.” Source: RevenueBase Database · checked Sep 22, 2026
19	AMA Architects	Strong evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	4 contacts →
	Strong evidence “In the vibrant tapestry of South Africa’s architectural landscape, AMA Architects stands as a beacon of design innovation, sustainability, and human-centred emotive architecture.” Source: RevenueBase Database · checked Sep 22, 2026
20	Isago Architecture	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	4 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
21	VMG Consultants	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	4 contacts →
	Indirect evidence “VMG Consultants have been awarded Mechanical Engineering Consulting company of the year, two years running.” Source: RevenueBase Database · checked Sep 22, 2026
22	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
23	1000 Concepts	Partial evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	11-50	3 contacts →
	Partial evidence “Concepts was established in 2015 to offer bespoke architectural and interior design services.” Source: RevenueBase Database · checked Sep 22, 2026
24	Cityco Construction	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	2 contacts →
	Indirect evidence “We are builders and project managers.” Source: RevenueBase Database · checked Sep 22, 2026
25	Misplon	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 22, 2026	1-10	2 contacts →
	Indirect evidence “Misplon Green Building Consulting specialises in assisting property investors who are orientating their property portfolios towards “going green” and who need help in taking…” 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 71 sustainable design firms based in Johannesburg, South Africa

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

As of Sep 22, 2026

29.9%Verified-email coverage

14.6Average 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 71 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 Johannesburg, 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 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, 309 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 in South Africa

Sustainable design firms in Johannesburg71
Sustainable design firms in Cape Town68
Sustainable design firms in Pretoria49

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 Johannesburg, South Africa?

RevenueBase identified 71 sustainable design firms 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?

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 309 verified decision-maker contacts tracked across these 71 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.