Architecture + Interiors

RDA Architects & Interior Designers

Creating beautifully responsible London homes

RDA is a leading-edge London Architecture & Interior Design firm specializing in award-winning, beautifully modern passive homes that are healthier for you, your family, and the environment.

Passivhaus Certified Since 2010 | 25+ Years Experience | Design First, Science Next Approach

RDA Architects & Interior Designers

Creating beautifully responsible London homes

RDA is a leading-edge London Architecture & Interior Design firm specializing in award-winning, beautifully modern passive homes that are healthier for you, your family, and the environment.

Passivhaus Certified Since 2010 | 25+ Years Experience | Design First, Science Next Approach

Over 25 years ago, Richard Dudzicki founded RDA to change people’s perceptions of what a home could be. Long before our Passivhaus certification in 2010, we were innovating in the eco-friendly space with sustainable home design for years. Over 200 projects later, we’re still fulfilling Richard’s mission, creating cutting-edge solutions for healthier homes.


Our goal is to design homes that are wholly reflective of your lifestyle, needs, and future while also addressing the evolving needs of our planet. As leaders in the UK’s Passivhaus movement, we embrace our duty to push the building envelope, create more with less, solve complex problems, and use our experience to guide you towards a better, cleaner, more comfortable lifestyle.

Ask the Expert

If you are interested in starting a project, but unsure of how to get started, we highly recommend our “Ask the Expert” consultation.


These sessions, lead by our Director, Lead Architect, and Passivhaus Certified Specialist, Richard Dudzicki, will provide you the information and isight you need to get moving. Click below to learn more about this and other resources.

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Why work with RDA?

We are highly regarded by our clients and our industry for delivering certified Passivhaus design, embracing modular and offsite construction, achieving planning on awkward or sensitive sites, and designing beautiful bespoke interiors, all while respecting your  budget.


We will oversee your projects from beginning to end so we can be sure we achieve your unique vision. Our meticulous attention to detail ensures that every building we complete is beautiful, functional, sustainable and generates meaningful value for you.

  • You'll benefit from working with one of the best regarded Passivhaus specialists in the UK.
  • With more than 25 years and 200 successfully delivered project, you can be assured you are in good hands.
  • We've seen it all, from large commercial developments to bespoke contemporary homes and unique renovation work.
  • Our strong relationships with councils and planning authorities, including unique local arrangements, such as The Dulwich Estate Scheme of Management, ensure quick approvals.
  • Our “Inside Out” design method ensures that your project is built to the highest standard of quality and innovative design.

Meet Our Team

Let our dream team help you design your dream home!

Ask the Expert

Thinking of embarking on a building project and not sure how or where to start? You've come to the right place. Our “Ask the Expert” consultation is the answer!


Click the link below to book a consultation with Richard Dudzicki, RDA's Director, Lead Architect, and Passivhaus Certified Specialist.


With more than 25 years of architectural experience and a deep portfolio of more than 200 projects in Greater London, and the UK, Richard knows his way around a job site, and can give you the clarity you need about your project.


For local clients, RDA has a long-standing, close working relationship with the Dulwich Estate Scheme of management and have successfully completed, new-build renovation and extensions within the area, as well as many other conservation areas across the UK.

Recently featured In...

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RDA transformed our Victorian house creating maximum space and light and provided innovative solutions to our design brief. We can’t recommend them enough!

-Katie,

 Dulwich

Commonly Asked Questions

  • What makes RDA different from other architects?

    At RDA, it's all about our clients, and if you don't feel like you are our only client, then we are not doing our job. We are highly experienced at helping clients get what they want, and that means you are our top priotiy, and we are here for you.

  • How do you work with celebrities and public figures?

    RDA has worked with a number of celebrities and public figures. Due to the private and intimate nature of our work, respecting the privacy and security of our clients is a top priority. For this reason, we offer a non-disclosure option to all clients.

  • What is Passivhaus?

    RDA is a leading PassivHaus design firm in the UK. A Passivhaus building is designed to be highly efficient, using effective insulation to remove drafts, and reducing the energy required to heat the home. It's not about relying on “eco-bling” to call it sustainable. Using PassivHaus certified materials and processes, we can deliver a more comfortable, higher quality building while reducing running costs by 90%, in any type of building.

  • How can I hire you?

    To get started with RDA, please schedule an “Ask the Expert” session or reach out to use by phone, email, or by

Recent Blogs

How to Design a home London Architects Retrofit Extension Dulwich
By Richard Dudzicki February 21, 2025
At RDA Architects, we know that designing a home is a personal and transformative journey. That’s why we’ve developed a 5-phase approach to guide you seamlessly through each stage—offering clarity, structure, and confidence from start to finish. From navigating planning permissions to bringing your vision to life with site visits, 3D visualisations, and models, we ensure a smooth and enjoyable experience. Unlike many practices, we integrate sustainability from day one, considering embodied carbon, airtightness, and energy efficiency from the outset.
By Richard Dudzicki February 17, 2025
We’re delighted to share that The Connected House has been shortlisted for the RIBA London Awards 2024—a recognition that celebrates architectural excellence and innovation. Nestled in the heart of The Dulwich Estate’s conservation area, The Connected House is a prime example of how cutting-edge sustainability and technological integration can breathe new life into a mid-century home. Originally designed by Austin Vernon & Partners in the early 1960s, this home stood as a relic of its time—boasting incredible views of London’s skyline but suffering from decades of substandard modifications. 
Sustainable architects London
By Richard Dudzicki January 30, 2025
Richard caught up with David Taylor, the editor of the New London Quarterly and New London Weekly covering the following topics: Celebrating 25 Years of RDA Architects At RDA Architects, we’ve always pushed the boundaries of home design, sustainability, and innovation. As we mark 25 years in business, Richard Dudzicki, our founder and a leading Passivhaus specialist, sat down with David Taylor to reflect on our journey, the future of home design, and some unexpected work environments. A Journey Through 25 Years of Architecture Since founding RDA, Richard has been dedicated to creating energy-efficient, forward-thinking homes. As one of the UK’s early adopters of Passivhaus design, RDA has championed sustainability long before it became an industry buzzword. Over the years, our team has tackled everything from ultra-modern city homes to cutting-edge eco-living spaces, constantly reimagining how people live and interact with their environment. Passivhaus: The Future of Home Design During the interview, Richard emphasized the importance of Passivhaus principles—airtight construction, high-quality insulation, and energy efficiency. With increasing energy costs and a growing awareness of our environmental impact, designing homes that work with nature rather than against it is more crucial than ever.
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