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Business Details
23 Years
experience
Your Trusted Cardiff Architects for Bespoke Design Solutions
Established in 2003, Kotzmuth Williams Architects is a Cardiff-based practice dedicated to delivering bespoke architectural solutions tailored to individual client needs. Our approach prioritises thoughtful modern design that harmonises with its surroundings, addressing client objectives, site orientation, and landscape considerations. With extensive experience in sensitive contexts, including listed buildings and conservation areas, we combine design excellence with technical expertise in construction, materials, and detailing. As a Royal Institute of British Architects chartered practice, we uphold rigorous professional standards while navigating statutory requirements such as planning applications and building regulations.

Our commitment to safety, structural integrity, and durability ensures clients receive comprehensive, budget-conscious solutions. By fostering strong relationships with local authorities and conservation officers, we deliver projects that balance contemporary functionality with historical preservation, enhancing property value and usability for future generations.
Services
Architectural Design Listed Building Restoration Planning Applications Building Regulations Compliance Conservation Area Projects
Details
  • Year established: 2003
Highlights and features
  • We offer over 20 years of architectural expertise in Cardiff
  • Specialists in working with listed buildings and conservation areas
  • Bespoke design process focused on client objectives and site context
  • Comprehensive understanding of construction, materials, and detailing
  • Proven track record navigating planning and building regulations
Associations and certifications
  • Royal Institute of British Architects
  • Architects Registration Board
Services
Architectural Design
Our architectural design service creates modern, context-sensitive buildings tailored to client needs. We focus on spatial functionality, aesthetic harmony with surroundings, and compliance with planning regulations. By integrating client objectives with site-specific factors like orientation and landscape, we deliver innovative solutions that enhance property value and usability while maintaining structural integrity.
Listed Building Restoration
Specialising in listed building restoration, we preserve historical integrity while introducing modern upgrades. Our expertise includes navigating conservation area restrictions, sourcing period-appropriate materials, and implementing structural reinforcements. We collaborate with heritage officers to ensure compliance with statutory requirements, balancing preservation with contemporary functionality for extended usability of historic properties.
Planning Applications
We manage the full planning application process for new builds and extensions. This includes preparing detailed proposals, conducting site analyses, and liaising with local authorities. Our deep understanding of Cardiff's planning policies ensures submissions meet regulatory standards, maximising approval chances while addressing potential objections from conservation or planning bodies.
Building Regulations Compliance
Our service ensures all projects meet UK building regulations through meticulous design review and documentation. We address structural safety, thermal efficiency, and accessibility standards, preparing technical drawings for approval. By integrating compliance checks early in the design phase, we prevent costly revisions and guarantee safe, durable constructions that satisfy legal requirements.
Conservation Area Projects
For conservation area developments, we create designs that respect architectural heritage while meeting modern needs. This involves material selection matching original structures, preserving visual character, and implementing energy-efficient upgrades. Our experience with local planning officers ensures projects gain approval while maintaining the area's historical significance and aesthetic cohesion.
People
Sion Williams
New Business Director
Sion Williams leads new business development at Kotzmuth Williams Architects, leveraging over 15 years of industry experience. He specialises in client consultation, project scoping, and ensuring alignment between architectural vision and client aspirations while maintaining regulatory compliance.
Questions
Are architects regulated in the UK?
Yes, architects in the UK are regulated by the Architects Registration Board (ARB), which ensures professional standards and ethical practice compliance.
Why should I use an architect for my project?
Architects provide expert design solutions, navigate planning regulations, and ensure structural integrity while aligning projects with your specific requirements and budget.
What qualifications should an architect have?
Architects must be registered with the Architects Registration Board (ARB) and typically hold a Royal Institute of British Architects (RIBA) chartered status for professional recognition.
Do I need both an architect and a builder?
Yes, architects handle design and regulatory compliance while builders manage construction. Engaging an architect first ensures your project meets planning standards before construction begins.
How do architects assist with listed buildings?
Architects specialise in preserving historical integrity while implementing modern upgrades, ensuring all work complies with listed building consent requirements and conservation area guidelines.