This selection of companies in the United Kingdom primarily showcases established architecture and planning firms. Companies like Foster + Partners, ZHA, and Grimshaw are global architectural practices, while PRP focuses on housing design and urban regeneration. The Northern Ireland Housing Executive provides housing services in its region.
A notable trend among these companies is the strong concentration of headquarters in London, indicating the city's role as a central hub for architecture and planning in the UK. Many of these firms also have a long history, with several founded in the mid-20th century or earlier, such as RIBA (1834) and AHR (1835).
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Foster + Partnersfosterandpartners.com
Global architecture and design studio focusing on sustainable urbanism, with diverse international teams and worldwide offices. |
3,025 | |||
| 2 |
Automotive Market
The company offers comprehensive social media marketing services, including strategy, content creation, campaign management, and data analysis to help businesses thrive online |
3,000 | |||
| 3 |
10N Collective10ncollective.com
Global collective of urbanism, architecture, and design experts focused on sustainable citymaking, environmental and social responsibility across continents. |
1,735 | |||
| 4 | 1,250 | ||||
| 5 |
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 |
1,029 | |||
| 6 |
AutoCAD Designerorg.uk
Helping clients connect with top architects and architectural designers for their projects, ensuring they find the best professionals in the industry |
1,019 | |||
| 7 | 779 | ||||
| 8 |
ZRPzrparchitects.co.uk
A dynamic design studio in London specializing in architecture for education, residential, commercial, and ecclesiastical buildings, with experience in listed structures |
744 | |||
| 9 |
Freelance Architectfreelancehubs.com
Hire freelance architects for project-based work, paying only for hours worked Find skilled freelancers for affordable architecture services on our platform |
668 | |||
| 10 |
Pegasus Grouppegasusgroup.co.uk
Specialists in planning and development, providing expert solutions and services since 2003 Dedicated to delivering excellence and success for clients' goals |
665 | |||
| 11 | 610 | ||||
| 12 |
Grimshawgrimshaw.global
A global architecture practice with offices worldwide, specializing in designing innovative, sustainable buildings across various sectors and winning numerous awards |
531 | |||
| 13 | 520 | ||||
| 14 |
tp bennetttpbennett.com
Independent architectural and design practice with over 100 years of experience, offering cross-sector expertise and a strong international presence. |
482 | |||
| 15 | 473 | ||||
| 16 |
Broadway Malyanbroadwaymalyan.com
Global urbanism practice specializing in sustainable architecture, urban design, and placemaking to create thriving communities and environments. |
466 | |||
| 17 |
Sheppard Robsonsheppardrobson.com
collective of architects, interior designers, and masterplanners, designing people-centred buildings, spaces, and places with a focus on sustainability and innovation for life. |
444 | |||
| 18 |
10 Design10design.co
An international architecture and master planning practice, specializing in innovative design solutions for multicultural projects across the globe |
424 | |||
| 19 |
DPPdppukltd.com
This company provides specialized planning services for developers, landowners, businesses, and public sector bodies, focusing on land development and use |
423 | |||
| 20 |
LUClanduse.co.uk
An award-winning environmental consultancy specializing in holistic services to create sustainable cities, towns, and landscapes while addressing climate and biodiversity crises |
405 | |||
| 21 |
Chapman Taylorchapmantaylor.com
An award-winning global architecture and masterplanning practice, specializing in designing successful and creative mixed-use environments for residential, retail, leisure, hospitality, and office spaces |
397 | |||
| 22 |
Purcellpurcellarchitecture.com
A multidisciplinary team of architects, designers, and consultants specializing in transforming and creating innovative spaces for clients across the UK and Asia Pacific |
394 | |||
| 23 |
Home & Makerhomeandmaker.com
This company provides online architecture services for domestic home design, allowing homeowners to collaborate with experienced architects and designers on various projects |
386 | |||
| 24 | 381 | ||||
| 25 |
Turleyturley.co.uk
Specializing in advisory services for the built environment and more, we collaborate with clients to create thriving places and communities Offering various services for effectiveness |
357 | |||
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. | |||||
| 26 |
Allford Hall Monaghan Morrisahmm.co.uk
Designing and reinventing buildings across commercial, residential, healthcare, life sciences, education, and civic sectors in the UK and internationally |
355 | |||
| 27 |
HLM Architectshlmarchitects.com
An employee-owned architectural practice focused on thoughtful design, creating memorable spaces that improve lives and win accolades for their inclusive culture and social impact initiatives |
352 | |||
| 28 |
Stride Treglownstridetreglown.com
Employee-owned architectural practice specializing in designing Better Places for various sectors, emphasizing Empowered People and Resilient Partnerships with purpose-driven design |
350 | |||
| 29 |
Ryder Architectureryderarchitecture.com
This company is an architectural practice with diverse expertise, leading integrated projects to deliver value and positive impact for clients and communities worldwide |
333 | |||
| 30 |
Pascall+Watsonpascalls.co.uk
Offers architecture, masterplanning, interior design, wayfinding, and BIM expertise for transportation, education, leisure, and other sectors globally since 1956. |
328 | |||
| 31 |
SHH Architecture & Interiorsshh.co.uk
Award-winning architectural and interior design practice founded in 1991, based in London, working globally across residential, hospitality, and commercial sectors |
315 | |||
| 32 |
NLAnla.london
An independent center for London's built environment, facilitating discussions and events to shape a better city through research and exhibitions |
313 | |||
| 33 |
Allies and Morrisonalliesandmorrison.com
Designing lasting buildings and shaping enduring urban spaces, focusing on detailed craftsmanship and context, with a collaborative, multidisciplinary approach. |
311 | |||
| 34 |
Royal Town Planning Institutertpi.org.uk
The organization champions planning for prosperous communities, shaping policies and setting professional standards to address complex challenges in the UK |
309 | |||
| 35 |
LDA Designlda-design.co.uk
LDA Design creates great places by connecting people and landscape, specializing in urban design, renewable energy, and public realm projects |
272 | |||
| 36 |
Lichfields UKlichfields.uk
A leading planning and development consultancy in the UK, delivering insight, innovation, and advice to create exceptional places for future generations |
272 | |||
| 37 |
Hawkins\Brownhawkinsbrown.com
Design and deliver innovative, socially sustainable buildings across education, workplace, residential, infrastructure, and community sectors with collaborative approach. |
252 | |||
| 38 |
HTA Designhta.co.uk
A multi-disciplinary practice specializing in housing and regeneration, with teams in architecture, landscape design, planning, urban design, sustainability, and graphic design |
242 | |||
| 39 |
Boyerboyerplanning.co.uk
A multi-skilled planning consultancy offering expertise in planning, design, development economics, and sustainability for projects of any scale or type |
181 | |||
| 40 |
Hopkins Architectshopkins.co.uk
An international architectural practice with studios in London and Dubai, focusing on clear design thinking, material potential, craft, and context for innovative buildings worldwide |
171 | |||
| 41 |
ADP Architectureadp-architecture.com
Innovative architecture firm focused on creating positive experiences for people and communities through sustainable, engaging, and belonging-focused design solutions |
164 | |||
| 42 |
Design With Hempgmp-design.com
A customer-focused sports and wellbeing business with a strong emphasis on water safety, offering services such as swimming lessons, aqua therapy, and nutrition support |
164 | |||
| 43 |
Donald Insall Associatesdonaldinsallassociates.co.uk
Architectural practice specializing in conservation, heritage consultancy, and new design within historic settings, balancing tradition with transformation for purposeful, resilient environments. |
162 | |||
| 44 |
Resiresi.co.uk
Innovative home transformation company with a team of specialists offering financing, design, planning, and construction services supported by industry-leading technology |
160 | |||
| 45 |
CABEwebarchive.nationalarchives.gov.uk
Providing expert independent design advice to improve the quality of buildings and spaces in England through public engagement and professional debate |
159 | |||
| 46 |
Howellshowells.uk
A collaborative team of architects and designers internationally creates sustainable, low-energy buildings while investing in education and career development |
157 | |||
| 47 | 155 | ||||
| 48 | 150 | ||||
| 49 |
Twyfordtwyfordbathrooms.com
Innovative bathroom products with a focus on design, quality, environmental sustainability, and technological advancements, backed by excellent customer service and industry partnerships |
150 | |||
| 50 |
Adjaye Associatesadjaye.com
Global architectural firm led by Sir David Adjaye OBE, known for multicultural team, iconic designs worldwide, and prestigious awards in architecture industry |
148 | |||
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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 14, 2026.
More company lists in the United Kingdom
- The largest companies in the United Kingdom 36,547
- Multinational companies in the United Kingdom 7,458
- Financial services firms in the United Kingdom 3,711
- Financial Services companies in the United Kingdom 3,696
- Retail chains in the United Kingdom 3,289
- Professional services firms in the United Kingdom 2,706
- Software Development companies in the United Kingdom 2,600
- Manufacturers in the United Kingdom 2,159
- Companies with in-house R&D in the United Kingdom 1,930
- IT Services and IT Consulting companies in the United Kingdom 1,722
- Retail companies in the United Kingdom 1,596
- IT services companies in the United Kingdom 1,583
- Hotel and hospitality groups in the United Kingdom 1,461
- Companies with a mobile app in the United Kingdom 1,411
- Consulting firms in the United Kingdom 1,298
- E-commerce companies in the United Kingdom 1,246
- Hardware manufacturers in the United Kingdom 1,239
- Family-owned companies in the United Kingdom 1,224
- Hospitality companies in the United Kingdom 1,204
- Critical infrastructure operators in the United Kingdom 1,195
- Wellness and Fitness Services companies in the United Kingdom 1,151
- Retail Apparel and Fashion companies in the United Kingdom 1,085
- Subscription businesses in the United Kingdom 1,077
- Distributors and wholesalers in the United Kingdom 1,060