Tamtam Start free

List of Architecture and Planning companies in the world

Tamtam tracks 1,380 Architecture and Planning companies worldwide. This list ranks the 100 largest by number of employees on LinkedIn, led by CHINA STATE CONSTRUCTION (CSCEC), Gensler and Studio Tecnico. Their median headcount is 1,278. Half of them were founded in 1975 or later. The most common headquarters are London (7), New York (6) and Paris (5).

🌍 World100 companiesUpdated Nov 13, 2026

These are large companies in the architecture and planning sector worldwide, many of which are headquartered in the United States and Europe. The companies primarily offer architecture, design, and planning services, often with a focus on sustainability and innovation. Some also specialize in construction, interior design, and landscape architecture.

Notable firms include Gensler, a global architecture, design, and planning firm; HOK, offering design, architecture, engineering, and planning services; and Perkins&Will, a design and architecture firm creating healthy and beautiful spaces. Foster + Partners is a global architecture and design studio focusing on sustainable urbanism. The list also features Studio Tecnico, specializing in renovations and new constructions, and Interior Company, offering home construction and interior design services in India and UAE.

#CompanyIndustryHeadquarters EmployeesFounded
1
CHINA STATE CONSTRUCTION (CSCEC)cscec.com.cn

A leading construction and real estate conglomerate in China, specializing in housing construction, international contracting, infrastructure development, and real estate investment

Architecture and Planning 🇨🇳 Beijing 37,581 n/a
2
Genslergensler.com

Global architecture, design, and planning firm with a network of 6,000+ professionals creating positive change through impactful design across various sectors worldwide

Architecture and Planning 🇺🇸 San Francisco 8,363 1965
3
Studio Tecnicoblcristrutturazioni.com

A dynamic construction company in Rome specializing in renovations and new constructions, guiding clients from initial planning to project completion Offers design and bureaucratic support

Architecture and Planning 🇮🇹 Fiano Romano 6,298 2005
4
Agriculturesevenbucksirrigation.com

This company specializes in designing and managing landscape projects for residential and commercial properties, using technology to save resources and provide accurate results globally

Architecture and Planning 🇮🇳 Bengaluru 4,843 2006
5
HOKhok.com

A global firm offering design, architecture, engineering, and planning services to create sustainable and innovative solutions for clients and communities

Architecture and Planning 🇺🇸 New York 3,080 1955
6
Perkins&Willperkinswill.com

Design and architecture firm creating healthy, beautiful spaces worldwide with expertise in architecture, interior design, urban and landscape planning.

Architecture and Planning 🇺🇸 Chicago 3,060 1935
7
Foster + Partnersfosterandpartners.com

Global architecture and design studio focusing on sustainable urbanism, with diverse international teams and worldwide offices.

Architecture and Planning 🇬🇧 London 3,025 1967
8
Automotive Market

The company offers comprehensive social media marketing services, including strategy, content creation, campaign management, and data analysis to help businesses thrive online

Architecture and Planning 🇬🇧 London 3,000 n/a
9
Studio di Architetturaantoniodaprile.it

Providing architecture, design, and interior design services focused on creating functional and aesthetically pleasing spaces for clients.

Architecture and Planning 🇬🇷 2,998 n/a
10
HKS, Inc.hksinc.com

A global architecture and design firm with a focus on sustainability, creativity, and delivering elegant solutions for clients and collaborators

Architecture and Planning 🇺🇸 Dallas 2,916 1939
11
Interior Companyinteriorcompany.com

A subsidiary of a major real estate platform, this company in India and UAE offers hassle-free home construction and interior design services

Architecture and Planning 🇮🇳 Gurugram 2,834 2021
12
Écoleecole.co

A multidisciplinary Paris-based architecture studio founded by Nicolas Simon and Max Turnheim, specializing in architecture, furniture, graphic design, and exhibition set design

Architecture and Planning 🇫🇷 Paris 2,667 2007
13
WORKacwork.ac

Award-winning architecture firm focused on public, cultural, and civic projects worldwide, emphasizing social and environmental concerns through intelligent and playful design

Architecture and Planning 🇺🇸 New York 2,654 2003
14
KONTRAKTOR INDONESIAyoutube.com

This company offers consulting, contracting, architectural services, renovation, interior and exterior design, landscaping, supervision, materials, maintenance, and construction for various types of properties

Architecture and Planning 🇮🇩 Sentulcity Bogor 2,426 2010
15
LARlar.mx

A young design and construction firm focused on creating environments that meet client needs, convey clear messages, and generate unique experiences

Architecture and Planning 🇲🇽 Naucalpan De Juárez 2,278 n/a
16
Estudio de Arquitecturagabaldonarquitecto.es

A Sevilla-based company since 1994, specializing in residential, commercial, and industrial building projects with a focus on customized architecture and energy efficiency

Architecture and Planning 🇪🇸 Seville 2,258 1994
17
Skidmore, Owings & Merrill (SOM)som.com

A leading design firm creating environmentally-advanced solutions for a better future, recognized for carbon neutrality and commitment to equality

Architecture and Planning 🇺🇸 New York 2,247 1936
18
HGAhga.com

National design firm specializing in architecture and engineering, creating impactful and award-winning designs for healthcare, arts, education, government, science, technology, and energy sectors

Architecture and Planning 🇺🇸 Minneapolis 2,141 1953
19
DLR Groupdlrgroup.com

Integrated design firm specializing in architecture, engineering, interiors, planning, and building optimization for new construction, renovation, and adaptive reuse with a focus on sustainable design

Architecture and Planning 🇺🇸 30 Offices 2,067 1966
20
BIG - Bjarke Ingels Groupbig.dk

A global architecture firm based in multiple cities, specializing in innovative and pragmatic urban design, research, and development, with a focus on parental leave support

Architecture and Planning 🇺🇸 Brooklyn 1,994 2006
21
OLAolasustainability.com

An Austin-based architecture practice focusing on sustainable design, offering project-specific strategies that integrate clients' design objectives and sustainability goals through a collaborative team approach

Architecture and Planning 🇺🇸 Austin 1,933 2011
22
SmithGroupsmithgroup.com

Innovative design & engineering firm using research, technology, and design thinking to tackle challenges in architecture, engineering, and environmental science globally

Architecture and Planning 🇺🇸 Detroit 1,926 1853
23
OMAoma.com

International architecture practice with a research and design studio, led by eight partners, known for innovative buildings worldwide, with offices in multiple cities

Architecture and Planning 🇳🇱 Rotterdam 1,905 1975
24
EHAF Consulting Engineersehaf.com

Multidisciplinary engineering consultancy offering architecture, planning, civil, mechanical, electrical, infrastructure, and project management services across Middle East and Gulf regions.

Architecture and Planning 🇦🇪 1,896 1971
25
Architectarchitect.co.in

Specializing in architecture and planning for various projects to create innovative and functional designs tailored to clients' needs and preferences

Architecture and Planning 🇮🇳 N/a 1,883 n/a
26
IDEA INCideaincdesign.wetpaint.com

Interior Design company in Mumbai offering customized design services for residential, hospitality, and commercial spaces Experienced in creating high-quality, versatile design concepts from start to finish

Architecture and Planning 🇫🇷 Paris 1,845 n/a
27
DAR ENGINEERINGdar-engineering.com

Leading multidisciplinary consultancy firm providing design, architecture, engineering, project management, construction management, and planning services across various sectors to governments and companies.

Architecture and Planning 🇸🇦 Riyadh 1,803 n/a
28
CannonDesigncannondesign.com

An integrated design firm leveraging creative thinkers to develop solutions for clients and society, focusing on human flourishing through Living-Centered Design

Architecture and Planning 🇺🇸 New York 1,761 1945
29
The American Institute of Architects (AIA)aia.org

An organization supporting architects and allied partners through advocacy, continuing education, contract documents, market research, conferences, awards, and promoting design excellence

Architecture and Planning 🇺🇸 Washington 1,757 1857
30
MTAmtascape.com

A design firm specializing in Landscape Architecture and Urban Design, dedicated to creating sophisticated, functional, and place-based design solutions for clients

Architecture and Planning 🇨🇱 Santiago 1,746 2005
31
10N Collective10ncollective.com

Global collective of urbanism, architecture, and design experts focused on sustainable citymaking, environmental and social responsibility across continents.

Architecture and Planning 🇬🇧 London 1,735 2025
32
Studio tecnico Sabattinistudiosabattini.it

A professional engineering studio specializing in civil and industrial construction projects, including technical design, safety coordination, energy diagnostics, and administrative support

Architecture and Planning 🇮🇹 Bologna 1,720 1970
33
OUIarchi-oui.com

An innovative architecture and design firm prioritizing research, collaboration, and user-centered projects that enhance their surroundings through unique perspectives

Architecture and Planning 🇫🇷 Paris 1,702 2013
34
TVStvsdesign.com

Award-winning architecture and interior design firm based in Atlanta, with global project expertise across various sectors, delivering creative solutions since 1968

Architecture and Planning 🇺🇸 Atlanta 1,649 1968
35
LaBella Associateslabellapc.com

LaBella Associates is a nationally recognized Design Professional Corporation that creates partnerships with clients to deliver exceptional results in buildings, energy, infrastructure, and environmental projects

Architecture and Planning 🇺🇸 Rochester 1,613 1978
36
FCAfcarchitects.com

Full-service architectural and design firm creating resonant spaces for clients, incorporating collaboration, enhancing lives, and promoting environmental responsibility through defined, rigorous processes

Architecture and Planning 🇺🇸 Philadelphia 1,604 1954
37
Aedasaedas.com

Global architecture and design practice creating world-class solutions with deep cultural understanding for communities, driving innovation and sustainability in urban planning worldwide

Architecture and Planning 🇭🇰 Hong Kong 1,593 n/a
38
Corgancorgan.com

A leading architecture and design firm, prioritizing client and user needs, specializing in six market sectors with a focus on user-driven design

Architecture and Planning 🇺🇸 Dallas 1,564 1938
39
avocat

An architecture agency specializing in design and planning services for various projects

Architecture and Planning 🇫🇷 Paris 1,537 1985
40
SSH Designsshic.com

Multidisciplinary firm delivering architectural and engineering solutions for landmark projects across the Middle East and Africa with regional expertise and international design integrity.

Architecture and Planning 🇦🇪 Dubai 1,512 1961
41
KPFkpf.com

Architectural practice designing diverse, innovative buildings globally, focusing on quality, contextual sensitivity, and smart solutions without stylistic constraints

Architecture and Planning 🇺🇸 New York 1,463 1976
42
CMAcore-states.com

The company, now part of Core States Group, offers services related to engineering and architectural design Visit core-statescom for more information

Architecture and Planning 🇺🇸 Ambler 1,455 n/a
43
Pagepagethink.com

Multidisciplinary design, architecture, and engineering firm with 1,300+ staff and international offices Specializing in complex projects across various sectors Visit wwwpagethinkcom for more information

Architecture and Planning 🇺🇸 Washington 1,448 n/a
44
华东建筑设计研究总院 ECADIecadi.com

Renowned architectural design institute in China offering comprehensive services in architecture, urban planning, and more, specializing in diverse projects globally

Architecture and Planning 🇨🇳 Shanghai 1,446 1952
45
INTERIORinterior.fr

A company with over 40 years of expertise in designing and manufacturing high-end modular partition walls for adaptable environments with top quality and aesthetics

Architecture and Planning 🇫🇷 Paris 1,426 1981
46
NAOnaowork.com

An award-winning design consultancy in Beijing specializing in architecture, interiors, products, and scenography for ambitious projects in Greater China

Architecture and Planning 🇨🇳 Beijing 1,393 2011
47
DPS Group Globalarcadis.com

Global consulting, engineering, and construction management firm specializing in providing innovative solutions to high-tech industries worldwide

Architecture and Planning 🇳🇱 Amsterdam 1,391 1974
48
PBKpbk.com

A leading architecture, engineering, and consulting practice specializing in design solutions for education, healthcare, corporate, government, and sports/events sectors since 1981

Architecture and Planning 🇺🇸 Houston 1,366 n/a
49
outroselkispaisagismo.com.br

With over twenty years of experience, the company specializes in developing high-quality landscape architecture projects for demanding clients worldwide

Architecture and Planning 🇧🇷 São Paulo 1,363 n/a
50
ISGisginc.com

A multi-disciplinary firm with over 50 years of experience, owned by employees, serving various markets with collaboration, creativity, and diverse knowledge

Architecture and Planning 🇺🇸 Mankato 1,278 1973

Want more companies than this list?

This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers.

Get more companies, free
51
ZHAzha.com

Design and creation of innovative cultural, corporate, and residential spaces that harmonize with natural topography and human-made environments.

Architecture and Planning 🇬🇧 London 1,250 1980
52
Woods Bagotwoodsbagot.com

Global design studio with 17 studios in 6 regions, specializing in Architecture, Interiors, and Masterplanning Emphasizing collaboration and data-driven predictions of human behavior

Architecture and Planning 🇦🇺 Melbourne 1,233 1869
53
Bienes Y Raices

A real estate company specializing in buying, selling, and managing properties, offering expert guidance and services in the real estate market

Architecture and Planning 🇸🇻 Ahuachapan 1,150 2016
54
ACO Groupaco.com

Design and manufacture of intelligent drainage and water treatment systems that collect, clean, retain, and reuse water sustainably worldwide.

Architecture and Planning 🇩🇪 Büdelsdorf 1,116 1946
55
Perkins Eastmanperkinseastman.com

Global architecture and design firm focusing on creating a positive impact on people's lives through progressive and inventive design solutions worldwide

Architecture and Planning 🇺🇸 New York 1,107 1981
56
Architectusarchitectus.com.au

Architectural design practice focused on creating elegant, functional, and sustainable solutions across various sectors with a collaborative and human-centric approach

Architecture and Planning 🇦🇺 Melbourne 1,093 2001
57
Federal Capital Development Authority (FCDA)fcda.gov.ng

Leading the planning, design, and construction of a new Federal Capital to meet global standards, focusing on inclusivity, functionality, design, and aesthetics

Architecture and Planning 🇳🇬 Garki 1,076 n/a
58
Athié Wohnrathathiewohnrath.com.br

With over 25 years of experience, we specialize in innovative and high-quality architecture, construction, and technology projects that reflect people's values and companies' essence

Architecture and Planning 🇧🇷 São Paulo 1,073 1994
59
Dewan Architects & Engineersdewan-architects.com

Global multidisciplinary firm providing architecture, engineering, interior design, landscaping, master planning, sustainability, cost consultancy, and construction supervision services.

Architecture and Planning 🇸🇦 1,050 1984
60
SsDssdarchitecture.com

An interdisciplinary architecture firm focused on integrating form, energy, and materials to achieve maximum effect through sustainable design solutions

Architecture and Planning 🇰🇷 Seoul 1,044 n/a
61
CCDI GROUPccdi.com.cn

A global architecture and engineering consulting firm offering integrated services for urban construction and development, specializing in large span structures, high-rises, and city complexes

Architecture and Planning 🇨🇳 1,029 1994
62
Northern Ireland Housing Executivenihe.gov.uk

A housing authority established in 1971 in Northern Ireland, providing services for socially rented, privately rented, and owner-occupied accommodation to meet housing needs for all

Architecture and Planning 🇬🇧 Belfast BT2 8PB 1,029 1971
63
AutoCAD Designerorg.uk

Helping clients connect with top architects and architectural designers for their projects, ensuring they find the best professionals in the industry

Architecture and Planning 🇬🇧 London 1,019 n/a
64
Dorsch Gruppedorsch.com

An innovative consulting and engineering partner with a focus on transport, water, architecture, energy, and industry projects globally

Architecture and Planning 🇩🇪 Frankfurt 1,001 1951
65
ANJ Groupanj.co.in

A leader in Turnkey Projects offering expert Project Managers, Contracting Labor force, Green Factory, and design services with a nationwide presence

Architecture and Planning 🇮🇳 Mumbai 978 1979
66
Engenheiro Civilengenheirocivillondrina.com.br

Civil Engineer offering affordable and experienced services in multiple locations, recognized for dedication and professionalism with a 5-star rating

Architecture and Planning 🇧🇷 Londrina 964 n/a
67
MIGmigcom.com

An organization specializing in planning, design, and sustainability of environments for human development, emphasizing inclusivity, community engagement, and strategic approaches

Architecture and Planning 🇺🇸 Berkeley 963 1982
68
CADcadsa.mx

We are a team of specialized architects in the conceptual and technical development of real estate projects, turning clients' dreams into reality through design, engineering, and construction

Architecture and Planning 🇲🇽 Mexico City 958 n/a
69
北京市建筑设计研究院有限公司biad.com.cn

A leading state-owned architectural design company in Beijing, offering services in civil architecture, interior design, landscaping, urban planning, and engineering

Architecture and Planning 🇨🇳 957 1949
70
Architect Hafeez Contractorhafeezcontractor.com

Innovative architectural firm led by visionary Architect Hafeez Contractor, renowned for transforming urban landscapes and creating iconic structures worldwide

Architecture and Planning 🇮🇳 Mumbai 955 1982
71
DBA Groupdbagroup.it

Holding group in civil engineering, plant design, architecture, project management, and software development for infrastructure management Focus on growth and synergy

Architecture and Planning 🇮🇹 Villorba 952 1991
72
NORRnorr.com

Employee-owned A&E firm with 800 professionals in various sectors across multiple countries, focusing on purpose-driven design for sustainable and inclusive spaces

Architecture and Planning 🇨🇦 Toronto 947 1938
73
Independent Architectureindependentarchitecture.com

Denver-based architecture office blending design with pop culture Specializing in unique projects like small building for Chicago Architecture Biennial and steel barn kit house

Architecture and Planning 🇺🇸 Denver 936 2009
74
Sabbour Consultingsabbour.com

A leading multidisciplinary engineering consulting firm offering project management, design, construction, and valuation services for clients in Egypt and abroad

Architecture and Planning 🇪🇬 Cairo 933 1957
75
HFAhfa-ae.com

A full-service architectural and engineering firm with a diverse team empowering innovative design solutions for a variety of projects Flexible remote work options available

Architecture and Planning 🇺🇸 Bentonville 920 1990
76
DLZ Corporationdlz.com

A top consulting firm in architecture/engineering, DLZ works on projects nationwide, focusing on client service, innovation, and turning visions into reality

Architecture and Planning 🇺🇸 Columbus 911 1946
77
CPLcplteam.com

A multi-disciplined team of experts in design and engineering, specializing in projects for community, healthcare, education, and transportation sectors

Architecture and Planning 🇺🇸 Fairport 892 1975
78
NACnacarchitecture.com

An award-winning design firm with expertise in education, healthcare, senior living, and community recreation, creating innovative spaces that enhance lives

Architecture and Planning 🇺🇸 Seattle 888 1960
79
Arquitectonicaarquitectonica.com

A globally renowned architectural firm known for innovative, modern designs, with numerous awards and projects worldwide, pushing the boundaries of design

Architecture and Planning 🇺🇸 Miami 875 1977
80
Planungsbüro

Passionate about planning and organization, this company specializes in providing strategic and innovative solutions to meet client needs

Architecture and Planning 🇩🇪 Berlin 864 n/a
81
ZGF Architectszgf.com

ZGF is a design firm rooted in Oregon, focusing on creating sustainable, community-oriented projects across North America with a humanistic approach

Architecture and Planning 🇺🇸 Portland 857 1942
82
Saudi Diyar Consultantsdiyar.com

Leading multidiscipline design firm in the Middle East with diverse portfolio of commercial, institutional, residential, hospitality, healthcare, and urban design projects.

Architecture and Planning 🇸🇦 Jeddah 852 1985
83
PCApcadesign.com

PCA is a prominent design firm in Greater Boston, offering architecture, planning, and interior design services with a focus on innovative and award-winning solutions

Architecture and Planning 🇺🇸 Cambridge 852 1982
84
VA+vertical-arts.com

A Denver-based team of BIM professionals collaborates with architects and engineers globally to enhance BIM workflows and outcomes for successful design projects

Architecture and Planning 🇺🇸 Denver 847 2005
85
NBBJ Designnbbj.com

An innovative architecture and design firm creating dynamic environments for industry leaders and institutions worldwide, with a focus on community connectivity and sustainability

Architecture and Planning 🇺🇸 Seattle 841 1943
86
PT Yodya Karya (Persero)g20sideevents.id

A civil engineering organization based in Indonesia specializing in various construction projects and infrastructure development

Architecture and Planning 🇮🇩 Jakarta 839 n/a
87
SKETS Studiosketsstudio.com

Global leader in BIM consultancy & design documentation services for architecture, interior design, and engineering industries, delivering value through expertise and innovation on luxury projects worldwide

Architecture and Planning 🇮🇳 New Delhi 806 2005
88
JERDEjerde.com

This global design group specializes in innovative urban planning, architecture, and landscaping to create unique, experiential places around the world

Architecture and Planning 🇺🇸 Los Angeles 795 1977
89
Hassellhassellstudio.com

An international design practice with studios worldwide, creating the best places people love through holistic thinking and integrated design teams

Architecture and Planning 🇦🇺 Melbourne 791 1938
90
PAEpae-engineers.com

An engineering firm specializing in mechanical, electrical, and technology system design, with a focus on sustainability, regenerative engineering, and community impact

Architecture and Planning 🇺🇸 Portland 783 1967
91
Architonic ArchDaily

A design platform with 200 million monthly pageviews, providing 450,000 product pages for architects and designers Focused on improving user experience and company culture

Architecture and Planning 🇨🇭 Zurich 783 2020
92
AECOM INDIA PRIVATE LIMITEDonlinecareer360.com

Global provider of architecture, design, engineering, and construction services for public and private clients across various markets like transportation, facilities, and government

Architecture and Planning 🇮🇳 Gurugram 780 n/a
93
RIBAriba.org

Global professional membership body serving members and society to create better buildings, stronger communities, and a sustainable environment globally

Architecture and Planning 🇬🇧 London 779 1834
94
Colegio Oficial de Arquitectos de Madridcoam.org

The Architect's Association represents and unites professionals in Madrid, promoting relationships, serving as a reference point, and fostering professional growth Visit us!

Architecture and Planning 🇪🇸 Madrid 768 n/a
95
Padams Grouppadams.in

Specializes in unique interior decoration, design, and architecture projects, following ethical values and guidance to turn dreams into reality

Architecture and Planning 🇮🇳 Mumbai 766 1992
96
SMMAsmma.com

A multidisciplinary design firm balancing architecture, engineering, interiors, and site design to provide creative and technical expertise since 1955

Architecture and Planning 🇺🇸 Cambridge 766 1955
97
P&T Architects and Engineers Ltdp-t-group.com

International architectural engineering practice offering design services in South East Asia, Middle East, and Africa, with a focus on excellence and improving quality of life through creative and award-winning projects

Architecture and Planning 🇭🇰 Hong Kong 762 1868
98
BNAbna.nl

The company focuses on strengthening architectural firms by lobbying, supporting, and promoting the added value of architects to society

Architecture and Planning 🇳🇱 Amsterdam 755 1842
99
OHM Advisorsohm-advisors.com

AEP firm specializing in community advancement through multidisciplinary teamwork in architecture, engineering, and planning Award-winning work creating great places

Architecture and Planning 🇺🇸 Livonia 754 1962
100
ZRPzrparchitects.co.uk

A dynamic design studio in London specializing in architecture for education, residential, commercial, and ecclesiastical buildings, with experience in listed structures

Architecture and Planning 🇬🇧 London 744 2012

Turn this list into pipeline

Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.

Build your own list, free

How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 13, 2026.

More company lists in the world

The same list elsewhere