Company lists · Data refreshed September 2026

Top 25 Sustainable design consultants based in Singapore

Name: Sustainable design consultants based in Singapore
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 142 companies tracked

RevenueBase identified 142 sustainable design consultants headquartered in Singapore as of September 2026 and tracks 7,717 professional contacts across them, including 2,268 with verified work emails. Singapore is the largest hub.

This list covers sustainable design consultants headquartered in Singapore, 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

142Companies

7,717Contacts tracked

2,268Verified emails

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The 25 largest sustainable design consultants based in Singapore

Ranked by team size

Top 25 of 142 sustainable design consultants based in Singapore, 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	Ong&ong PTE LTD	Strong evidence	SingaporeHQ checked Sep 22, 2026	501-1,000	558 contacts →
	Strong evidence “ONG & ONG is a holistic 360 design solution consultancy excelling in infrastructure, education, commercial and high-density living.” Source: RevenueBase Database · checked Sep 22, 2026
2	Envirosolutions & Consulting	Strong evidence	SingaporeHQ checked Sep 22, 2026	51-200	109 contacts →
	Strong evidence “EnviroSolutions & Consulting (ESC) is the leading Environment, Safety, and Sustainability consultancy in Asia.” Source: RevenueBase Database · checked Sep 22, 2026
3	Building System And Diagnostics PTE LTD	Indirect evidence	Rochor, SingaporeHQ checked Sep 22, 2026	11-50	59 contacts →
	Indirect evidence “Building System & Diagnostics, or BSD as we like to call ourselves, started off in 2003 as a spin-off company of the National University of Singapore (NUS).” Source: RevenueBase Database · checked Sep 22, 2026
4	ID Architects PTE LTD	Indirect evidence	SingaporeHQ checked Sep 22, 2026	51-200	56 contacts →
	Indirect evidence “ID Architects is a multi-faceted architectural practice, based in Singapore that brings a unique and valuable blend of expertise for its valued customers.” Source: RevenueBase Database · checked Sep 22, 2026
5	WEB Structures	Indirect evidence	SingaporeHQ checked Sep 22, 2026	51-200	55 contacts →
	Indirect evidence “Web Structures is now Ramboll” Source: RevenueBase Database · checked Sep 22, 2026
6	Rankine&hill	Indirect evidence	SingaporeHQ checked Sep 22, 2026	51-200	51 contacts →
	Indirect evidence “We believe that when clients choose us, they often make decisions based on our people.” Source: RevenueBase Database · checked Sep 22, 2026
7	Vector Green	Partial evidence	SingaporeHQ checked Sep 22, 2026	51-200	43 contacts →
	Partial evidence “Vector Green is a Singapore-based energy and sustainability engineering firm helping organisations plan and implement practical energy transition solutions.” Source: RevenueBase Database · checked Sep 22, 2026
8	DCA Architects PTE LTD	Indirect evidence	SingaporeHQ checked Sep 22, 2026	51-200	41 contacts →
	Indirect evidence “DCA Architects is a Singaporean architecture firm established in 1996 as a partnership, which was later incorporated in 1998.” Source: RevenueBase Database · checked Sep 22, 2026
9	Tembusu Asia Consulting	Indirect evidence	SingaporeHQ checked Sep 22, 2026	11-50	40 contacts →
	Indirect evidence “TEMBUSU Asia Consulting derives its name from the Tembusu – a large evergreen tree in the family Gentianaceae which is native to Southeast Asia.” Source: RevenueBase Database · checked Sep 22, 2026
10	Spark Architects	Strong evidence	SingaporeHQ checked Sep 22, 2026	51-200	34 contacts →
	Strong evidence “Spark is an award-winning international architectural and design consultancy with proven expertise in architecture, urban design, landscape architecture and interior design.” Source: RevenueBase Database · checked Sep 22, 2026
11	I3 Solutions Group, Part Of Ramboll	Indirect evidence	SingaporeHQ checked Sep 22, 2026	51-200	31 contacts →
	Indirect evidence “I3 Solutions Group is now part of Ramboll.” Source: RevenueBase Database · checked Sep 22, 2026
12	Greena Consultants	Partial evidence	SingaporeHQ checked Sep 22, 2026	11-50	31 contacts →
	Partial evidence “We're here to create a more sustainable world.” Source: RevenueBase Database · checked Sep 22, 2026
13	Sterling Engineers	Indirect evidence	SingaporeHQ checked Sep 22, 2026	51-200	30 contacts →
	Indirect evidence “Synthesising and realising our client's vision into innovative and buildable solutions runs through and deep in every member of Sterling.” Source: RevenueBase Database · checked Sep 22, 2026
14	Ignesis Consultants PTE LTD	Strong evidence	SingaporeHQ checked Sep 22, 2026	11-50	25 contacts →
	Strong evidence “IGnesis is an established multi-disciplinary engineering consultancy firm in the fields of mechanical & electrical, Fire Safety & Risk Engineering, Environmental Sustainable…” Source: RevenueBase Database · checked Sep 22, 2026
15	Squire Mech PTE LTD	Indirect evidence	SingaporeHQ checked Sep 22, 2026	201-500	22 contacts →
	Indirect evidence “We started as Squire Beca in 1977, a small partnership between Raglan Squire & Partners and New Zealand-based Beca Carter.” Source: RevenueBase Database · checked Sep 22, 2026
16	Urbnarc	Strong evidence	SingaporeHQ checked Sep 22, 2026	11-50	21 contacts →
	Strong evidence “URBNarc was founded by Gaurang Khemka with a vision to create exceptional places and design sustainable out of the box solutions that add value to our clients.” Source: RevenueBase Database · checked Sep 22, 2026
17	Morrow Architects & Planners	Partial evidence	SingaporeHQ checked Sep 22, 2026	11-50	20 contacts →
	Partial evidence “Envisioning a future from one generation to the next, MORROW shapes lives through liveable and sustainable environments that foster identity, community, purpose, and possibilities.” Source: RevenueBase Database · checked Sep 22, 2026
18	Csrworks International	Partial evidence	SingaporeHQ checked Sep 22, 2026	11-50	18 contacts →
	Partial evidence “CSRWorks is a purpose-driven sustainability services firm committed to creating positive change.” Source: RevenueBase Database · checked Sep 22, 2026
19	Paia From Cbre	Indirect evidence	SingaporeHQ checked Sep 22, 2026	11-50	18 contacts →
	Indirect evidence “Paia FROM CBRE is the result of an amalgamation between CBRE Pte Ltd and Paia Consulting in August 2024.” Source: RevenueBase Database · checked Sep 22, 2026
20	EFC International	Partial evidence	SingaporeHQ checked Sep 22, 2026	51-200	18 contacts →
	Partial evidence “EFC, derived from Environmental First Corporation, embodies our core purpose of empowering sustainability excellence for a better world.” Source: RevenueBase Database · checked Sep 22, 2026
21	Pomeroy Studio	Strong evidence	SingaporeHQ checked Sep 22, 2026	11-50	17 contacts →
	Strong evidence “Pomeroy Studio are an award-winning international team of designers and thought leaders of sustainable built environments.” Source: RevenueBase Database · checked Sep 22, 2026
22	Massivue	Partial evidence	Hyderabad, SingaporeHQ checked Sep 22, 2026	11-50	16 contacts →
	Partial evidence “At MASSIVUE, we're not just consultants-we're architects of transformation.” Source: RevenueBase Database · checked Sep 22, 2026
23	Reart Group	Strong evidence	SingaporeHQ checked Sep 22, 2026	11-50	14 contacts →
	Strong evidence “REART Group is an international, integrated design and architectural consultancy firm offering a full range of services, including architecture, planning, interiors, landscape…” Source: RevenueBase Database · checked Sep 22, 2026
24	Aubrens	Indirect evidence	SingaporeHQ checked Sep 22, 2026	11-50	9 contacts →
	Indirect evidence “Aubrens is about building organisations that serve the world.” Source: RevenueBase Database · checked Sep 22, 2026
25	UNION	Partial evidence	SingaporeHQ checked Sep 22, 2026	11-50	9 contacts →
	Partial evidence “UNON is an international architectural and interior design firm specializing in workplace, showroom, retail, and hospitality projects.” 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 142 sustainable design consultants based in Singapore

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Sustainable design consultants based in Singapore at a glance

As of Sep 22, 2026

29.4%Verified-email coverage

54.3Average contacts per company

1-10Median size (employees)

91.5%Largest-city concentration · Singapore

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for Singapore, so it is reported there. Company counts and contact totals on this page are exact for Singapore, over 142 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 Singapore 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 Singapore 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, 2,268 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

Sustainable design consultants in Singapore130

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 Singapore?

RevenueBase identified 142 sustainable design consultants headquartered in Singapore 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?

Ong&ong PTE LTD, headquartered in Singapore, tops this list with the largest team on record.

Which city has the most sustainable design consultants?

Singapore leads with 130 headquartered companies, followed by Downtown Core (3) and Hyderabad (1).

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 2,268 verified decision-maker contacts tracked across these 142 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.