12 London Office Design & Build Firms Shaping Workspaces in 2025

If you're planning an office upgrade, whether a high-end fit-out or a flexible hybrid workspace, these 12 firms are among the best in London. But what makes each unique? Here’s a closer look at who they are, what they specialise in, and some of their recent projects.

1. Oktra – The Fast-Track Office Transformation Experts

🚀 Unique Factor: Oktra is known for delivering fast-track office transformations while integrating the latest smart workplace technology.

🏢 Recent Project: The Crosspoint, London – A complete modernisation with flexible work zones, high-end finishes, and smart tech integration.

🌐 Website: oktra.co.uk

2. Morgan Lovell – The Workplace Strategy Pioneers

🔍 Unique Factor: As well as design beautiful spaces Morgan Lovell will help companies rethink their workplace strategy, optimising for hybrid work and well-being.

🏢 Recent Project: Confidential Client HQ, London – An agile workspace designed for flexibility and team collaboration.

🌐 Website: morganlovell.co.uk 📧 Contact: nathan.wroughton@morganlovell.com

📞 Phone: 020 7734 4466

3. Peldon Rose – People-First, Culture-Driven Design

💡 Unique Factor: Peldon Rose specialises in brand-led office design, ensuring workspaces reflect a company’s culture and values.

🏢 Recent Project: Totaljobs Group London HQ – A dynamic, brand-focused office designed for collaboration and engagement.

🌐 Website: peldonrose.com

4. Two – The Go-To Firm for Startups & Growing Businesses

📈 Unique Factor: Bespoke workspace solutions for startups and scaling companies, tailoring designs to reflect each business’s identity.

🏢 Recent Project: Literacy Capital Offices – A customized, space-efficient design that balances aesthetics with functionality.

🌐 Website: wearetwo.com

5. Soul Spaces – The Sustainability-First Design Firm

🌱 Unique Factor: Soul Spaces is one of the most eco-conscious firms in London, offsetting 20 tonnes of CO₂ for every £200k spent.

🏢 Sustainability Impact: Creating low-carbon, high-performance workspaces.

🌐 Website: soulspaces.london 📧 Contact: joe@soulspaces.london

📞 Phone: (Joe): 0208 588 9876

6. Fusion Office Design – The Detail-Oriented Innovators

🎯 Unique Factor: Fusion Office Design blends innovation with practicality, ensuring that every workspace is functional, visually striking, and built to last.

🏢 Client Feedback: Known for their proactive project management and precision execution.

🌐 Website: fusionofficedesign.co.uk 📧 Contact: info@fusionofficedesign.co.uk

📞 Phone: 020 8251 0692

7. Constructive Space – The Intelligent Fit-Out Specialists

🏗 Unique Factor: With over 40 years of experience, Constructive Space specialises in intelligent workspace transformations, whether for relocations, refreshes, or full-scale refurbishments.

🏢 Focus: Experts in maximising office space potential.

🌐 Website: constructivespace.com

8. M Moser Associates – Global Experts in Workplace Wellbeing

🌍 Unique Factor: M Moser Associates integrates architecture, interior design, and workplace wellness into their projects, ensuring sustainable and people-focused offices.

🏢 Recent Project: All Saints HQ, London – A workspace built around sustainability and employee well-being.

🌐 Website: mmoser.com

9. Maris Interiors – The Corporate Office Fit-Out Leaders

🏢 Unique Factor: Maris Interiors is one of the most established corporate fit-out firms in London, with an extensive portfolio of high-end office transformations.

🏢 Recent Projects: High-end corporate office fit-outs across multiple industries.

🌐 Website: maris-interiors.co.uk

10. Area – The Workplace Innovation Experts

🚀 Unique Factor: Area specialises in tailored workplace strategies, designing spaces that support collaboration, deep work, and hybrid models.

🏢 Recent Project: Diverse office upgrades prioritising productivity, well-being, and flexibility.

🌐 Website: area.co.uk 📧 Contact: info@area.co.uk 📞 Phone: 0207 089 6000

11. Thirdway – The Sustainability-Driven Design Firm

♻ Unique Factor: Thirdway takes a data-driven approach to sustainable office design, ensuring that workspaces are both high-performance and environmentally responsible.

🏢 Recent Project: A multi-sector workspace upgrade integrating green design principles.

🌐 Website: thirdway.com

12. AIS (Advanced Interior Solutions) – The High-Performance Workspace Specialists

⚡ Unique Factor: AIS (Applied Information Sciences) is one of the most technically advanced office fit-out firms, offering cutting-edge workplace solutions with a focus on high-performance environments.

🏢 Recent Project: Sleek, technology-enhanced office spaces designed for productivity and efficiency.

🌐 Website: ais-interiors.com

For a deep dive into London’s architectural evolution and the heritage shaping today’s commercial buildings, see London's Commercial Architecture.

For insights into prime office spaces commanding top rents and high demand, visit Prime Offices.

To explore how modular design and office pods are transforming workspaces for enhanced flexibility and productivity, see The Future of Workspaces: Leveraging Office Pods and Modular Architecture.