Business Details
21 Years
experience
Award-Winning Architects in London | Ullmayer Sylvester Architects
Ullmayer Sylvester Architects is a design-led architectural studio established in 2005 following our involvement in a collaborative custom-build housing project in North London. Our practice specialises in creating beautiful, sustainable, and well-loved homes and buildings, with our clients at the heart of every project. Over the years, we have delivered finely crafted projects that have garnered national and international recognition, including two RIBA Awards, a Wood Award, and multiple Hackney Design Awards. Our approach integrates spaces within broader contexts, ensuring even the smallest areas feel generous and functional. We collaborate closely with consultants and contractors throughout the design and construction process to achieve cost-effective, elegant solutions.Our directors tailor each project to the unique needs of our clients and their families, ensuring their vision remains central to every decision. With extensive experience across domestic, custom-build, and niche urban projects, we combine expertise with a passion for reimagining architectural typologies. Our team includes directors Silvia Ullmayer and Allan Sylvester, both with distinguished academic and professional backgrounds, alongside skilled architectural assistants. We prioritise transparency, trust, and innovation, aiming to deliver high-quality environments that stand the test of time. Our work has been widely published and celebrated for its environmental leadership and design excellence.
Services
Residential Architecture
Sustainable Design
Project Management
Custom-Build Solutions
Urban Regeneration
Details
- Year established: 2005
Highlights and features
- We have over 15 years of experience in sustainable residential architecture.
- Our projects have won multiple RIBA and Hackney Design Awards.
- We prioritise client collaboration throughout every project stage.
- Our directors hold advanced qualifications from leading UK institutions.
- We integrate environmental leadership into all our designs.
Associations and certifications
- RIBA
- AJ Architecture Awards
- Hackney Design Awards
What people say
Award-winning
Client-centric
Sustainable focus
Innovative designs
High-quality results
Services
Residential Architecture
We create bespoke residential spaces that balance aesthetic appeal with functional efficiency. Our approach focuses on natural light, spatial flow, and material sustainability. Each project receives tailored solutions that reflect the client's lifestyle and environmental considerations.
Sustainable Design
Our sustainable designs prioritise energy efficiency, recyclable materials, and minimal environmental impact. We incorporate passive heating/cooling systems and green technologies to future-proof buildings. This approach has earned us the NLA Environmental Leadership Prize and multiple industry accolades.
Project Management
We oversee projects from concept to completion, coordinating consultants and contractors to maintain quality and budget. Our RIBA-stage compliant process ensures seamless transitions between design phases. Regular site visits and transparent reporting guarantee adherence to timelines and specifications.
Custom-Build Solutions
We deliver unique custom-build homes designed around client requirements. Our process includes site analysis, material selection, and cost planning. Projects like 'Hearthaus' demonstrate our ability to create distinctive, award-winning properties that exceed client expectations.
Urban Regeneration
We revitalise urban spaces through adaptive reuse and contextual design. Our work on projects like Whatcotts Yard demonstrates expertise in blending historical elements with modern functionality. We focus on community impact and long-term urban sustainability.
People
Silvia Ullmayer
Director
Silvia studied in Germany and the UK, tutored at CASS, and worked with renowned firms like Caruso St John. She brings expertise in sustainable design and holds RIBA and ARB qualifications.
Allan Sylvester
Director
Allan studied at CASS and the Bartlett, with teaching experience at Oxford Brookes. He specialises in project delivery and recently trained as a drone pilot to enhance site analysis capabilities.
Agnes Elvin
Architectural Assistant
Agnes combines precision with creativity, contributing to detailed design work. She holds a BA (Hons) and enhances projects with her photography skills and Scandinavian design perspective.
Questions
What architectural services do you specialise in?
We specialise in residential architecture, sustainable design, custom-build projects, and urban regeneration schemes tailored to client needs.
How do you involve clients in the design process?
Clients lead every project. We develop bespoke designs through collaborative briefings, regular consultations, and transparent decision-making throughout all stages.
What is your approach to sustainable architecture?
We integrate environmental leadership by using eco-friendly materials, optimising energy efficiency, and designing adaptable spaces that reduce long-term resource consumption.
Which awards have your projects won?
Our work has received RIBA Awards, Hackney Design Awards, AJ Retrofit Awards, and the NLA Environmental Leadership Prize for innovative sustainable practices.
How are architectural fees calculated?
Fees typically range from 14–17% of construction costs for projects up to £250,000, with percentages decreasing for larger budgets to reflect economies of scale.
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