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