# Architecture and Planning companies headquartered in London

Tamtam tracks 45 Architecture and Planning companies headquartered in London. This list ranks the 30 largest by number of employees on LinkedIn, led by Foster + Partners, Automotive Market and 10N Collective. Their median headcount is 405. Half of them were founded in 1976 or later.

These London-based companies are primarily established architecture and planning firms, many with a global reach. Foster + Partners, with 3025 employees, is a global architecture and design studio focusing on sustainable urbanism. ZHA specializes in innovative cultural, corporate, and residential spaces. Benoy delivers sustainable solutions for the built environment, and Grimshaw is a global architecture practice designing sustainable buildings across various sectors.

A notable pattern among these companies is their long history, with many founded mid-20th century. RIBA, established in 1834, is a global professional membership body. PRP, founded in 1963, has 60 years' experience in housing design and urban regeneration. Sheppard Robson, founded in 1938, designs people-centred buildings with a focus on sustainability.

🇬🇧 London · 30 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Foster + Partners](https://www.tamtam.ai/c/foster-partners) (fosterandpartners.com)<br>Global architecture and design studio focusing on sustainable urbanism, with diverse international teams and worldwide offices. | Architecture and Planning | 🇬🇧 London | 3,025 | 1967 |
| 2 | [Automotive Market](https://www.tamtam.ai/c/automotive-market)<br>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 |  |
| 3 | [10N Collective](https://www.tamtam.ai/c/10n-collective) (10ncollective.com)<br>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 |
| 4 | [ZHA](https://www.tamtam.ai/c/zha) (zha.com)<br>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 |
| 5 | [AutoCAD Designer](https://www.tamtam.ai/c/autocad-designer) (org.uk)<br>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 |  |
| 6 | [RIBA](https://www.tamtam.ai/c/riba) (riba.org)<br>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 |
| 7 | [ZRP](https://www.tamtam.ai/c/zrp) (zrparchitects.co.uk)<br>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 |
| 8 | [Freelance Architect](https://www.tamtam.ai/c/freelance-architect) (freelancehubs.com)<br>Hire freelance architects for project-based work, paying only for hours worked Find skilled freelancers for affordable architecture services on our platform | Architecture and Planning | 🇬🇧 London | 668 |  |
| 9 | [Benoy](https://www.tamtam.ai/c/benoy) (benoy.com)<br>A global design specialist committed to delivering iconic and sustainable solutions for the built environment through creative commerciality and innovative design strategies | Architecture and Planning | 🇬🇧 London | 610 | 1947 |
| 10 | [Grimshaw](https://www.tamtam.ai/c/grimshaw) (grimshaw.global)<br>A global architecture practice with offices worldwide, specializing in designing innovative, sustainable buildings across various sectors and winning numerous awards | Architecture and Planning | 🇬🇧 London | 531 | 1980 |
| 11 | [PRP](https://www.tamtam.ai/c/prp) (prp-co.uk)<br>An interdisciplinary design practice with 60 years' experience in housing design and urban regeneration, delivering intelligent, enduring designs for lasting communities | Architecture and Planning | 🇬🇧 London | 520 | 1963 |
| 12 | [tp bennett](https://www.tamtam.ai/c/tp-bennett) (tpbennett.com)<br>Independent architectural and design practice with over 100 years of experience, offering cross-sector expertise and a strong international presence. | Architecture and Planning | 🇬🇧 London | 482 | 1921 |
| 13 | [Sheppard Robson](https://www.tamtam.ai/c/sheppard-robson) (sheppardrobson.com)<br>collective of architects, interior designers, and masterplanners, designing people-centred buildings, spaces, and places with a focus on sustainability and innovation for life. | Architecture and Planning | 🇬🇧 London | 444 | 1938 |
| 14 | [10 Design](https://www.tamtam.ai/c/10-design) (10design.co)<br>An international architecture and master planning practice, specializing in innovative design solutions for multicultural projects across the globe | Architecture and Planning | 🇬🇧 London | 424 | 2010 |
| 15 | [LUC](https://www.tamtam.ai/c/luc) (landuse.co.uk)<br>An award-winning environmental consultancy specializing in holistic services to create sustainable cities, towns, and landscapes while addressing climate and biodiversity crises | Architecture and Planning | 🇬🇧 London | 405 | 1966 |
| 16 | [Purcell](https://www.tamtam.ai/c/purcell) (purcellarchitecture.com)<br>A multidisciplinary team of architects, designers, and consultants specializing in transforming and creating innovative spaces for clients across the UK and Asia Pacific | Architecture and Planning | 🇬🇧 London | 394 | 1947 |
| 17 | [Home & Maker](https://www.tamtam.ai/c/home-and-maker) (homeandmaker.com)<br>This company provides online architecture services for domestic home design, allowing homeowners to collaborate with experienced architects and designers on various projects | Architecture and Planning | 🇬🇧 London | 386 |  |
| 18 | [Allford Hall Monaghan Morris](https://www.tamtam.ai/c/allford-hall-monaghan-morris) (ahmm.co.uk)<br>Designing and reinventing buildings across commercial, residential, healthcare, life sciences, education, and civic sectors in the UK and internationally | Architecture and Planning | 🇬🇧 London | 355 | 1989 |
| 19 | [Pascall+Watson](https://www.tamtam.ai/c/pascall-watson) (pascalls.co.uk)<br>Offers architecture, masterplanning, interior design, wayfinding, and BIM expertise for transportation, education, leisure, and other sectors globally since 1956. | Architecture and Planning | 🇬🇧 London | 328 | 1956 |
| 20 | [SHH Architecture & Interiors](https://www.tamtam.ai/c/shh-architecture-and-interiors) (shh.co.uk)<br>Award-winning architectural and interior design practice founded in 1991, based in London, working globally across residential, hospitality, and commercial sectors | Architecture and Planning | 🇬🇧 London | 315 | 1991 |
| 21 | [NLA](https://www.tamtam.ai/c/nla) (nla.london)<br>An independent center for London's built environment, facilitating discussions and events to shape a better city through research and exhibitions | Architecture and Planning | 🇬🇧 London | 313 | 2005 |
| 22 | [Allies and Morrison](https://www.tamtam.ai/c/allies-and-morrison) (alliesandmorrison.com)<br>Designing lasting buildings and shaping enduring urban spaces, focusing on detailed craftsmanship and context, with a collaborative, multidisciplinary approach. | Architecture and Planning | 🇬🇧 London | 311 | 1984 |
| 23 | [Royal Town Planning Institute](https://www.tamtam.ai/c/royal-town-planning-institute) (rtpi.org.uk)<br>The organization champions planning for prosperous communities, shaping policies and setting professional standards to address complex challenges in the UK | Architecture and Planning | 🇬🇧 London | 309 | 1914 |
| 24 | [Hawkins\Brown](https://www.tamtam.ai/c/hawkins-brown) (hawkinsbrown.com)<br>Design and deliver innovative, socially sustainable buildings across education, workplace, residential, infrastructure, and community sectors with collaborative approach. | Architecture and Planning | 🇬🇧 London | 252 | 1988 |
| 25 | [HTA Design](https://www.tamtam.ai/c/hta-design) (hta.co.uk)<br>A multi-disciplinary practice specializing in housing and regeneration, with teams in architecture, landscape design, planning, urban design, sustainability, and graphic design | Architecture and Planning | 🇬🇧 London | 242 | 1969 |
| 26 | [Hopkins Architects](https://www.tamtam.ai/c/hopkins-architects) (hopkins.co.uk)<br>An international architectural practice with studios in London and Dubai, focusing on clear design thinking, material potential, craft, and context for innovative buildings worldwide | Architecture and Planning | 🇬🇧 London | 171 | 1976 |
| 27 | [ADP Architecture](https://www.tamtam.ai/c/adp-architecture) (adp-architecture.com)<br>Innovative architecture firm focused on creating positive experiences for people and communities through sustainable, engaging, and belonging-focused design solutions | Architecture and Planning | 🇬🇧 London | 164 | 1965 |
| 28 | [Donald Insall Associates](https://www.tamtam.ai/c/donald-insall-associates) (donaldinsallassociates.co.uk)<br>Architectural practice specializing in conservation, heritage consultancy, and new design within historic settings, balancing tradition with transformation for purposeful, resilient environments. | Architecture and Planning | 🇬🇧 London | 162 | 1958 |
| 29 | [Resi](https://www.tamtam.ai/c/resi) (resi.co.uk)<br>Innovative home transformation company with a team of specialists offering financing, design, planning, and construction services supported by industry-leading technology | Architecture and Planning | 🇬🇧 London | 160 | 2017 |
| 30 | [CABE](https://www.tamtam.ai/c/cabe) (webarchive.nationalarchives.gov.uk)<br>Providing expert independent design advice to improve the quality of buildings and spaces in England through public engagement and professional debate | Architecture and Planning | 🇬🇧 London | 159 | 1999 |

## 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 12, 2026.

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## The same list elsewhere in United Kingdom

- [Architecture and Planning companies in the United Kingdom](https://www.tamtam.ai/l/architecture-and-planning-companies-united-kingdom) (90)
- [Architecture and Planning companies in England](https://www.tamtam.ai/l/architecture-and-planning-companies-england) (78)

## The same list elsewhere

- [Architecture and Planning companies in the world](https://www.tamtam.ai/l/architecture-and-planning-companies-in-the-world) (1,380)
- [Architecture and Planning companies in Europe](https://www.tamtam.ai/l/architecture-and-planning-companies-in-europe) (671)

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Source: https://www.tamtam.ai/l/architecture-and-planning-companies-london