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Business Details
16 Years
experience
Expert Architectural Design & Sustainable Solutions in Brighton
Established in 2010, Cityzen is an award-winning architectural practice combining architectural design, energy performance, and building services engineering expertise. Our multidisciplinary team specialises in sustainable design solutions for commercial, residential, and heritage projects, including hotel refurbishments, modular construction, and listed property restorations. With a focus on reducing energy usage and carbon footprints, we provide comprehensive services from initial design through to construction support.

Our team holds CIAT accreditation and has delivered innovative projects across the UK, including social housing developments recognised with LABC national awards. We prioritise collaboration with stakeholders and integrate mechanical and electrical engineering early in the design process to ensure efficient, buildable solutions.
Services
Architectural Design Energy Consultancy Principal Designer Services Sustainable Design Modular Construction Building Regulations Compliance Heritage Restoration Low Carbon Solutions MEP Integration Project Management
Details
  • Year established: 2010
Highlights and features
  • Award-winning practice with LABC national recognition
  • Integrated architectural and M&E engineering expertise
  • CIAT-registered principal designer services under Building Safety Act 2023
  • Specialists in sustainable design with BREEAM assessment experience
  • Proven track record in complex projects including listed buildings
Associations and certifications
  • LABC
  • CIAT
What people say
Professional and reliable Excellent problem-solving capabilities Award-winning service delivery Sustainable solutions expertise Collaborative approach
Services
Architectural Design
We provide comprehensive architectural design services for new builds, renovations, and modular constructions. Our approach combines aesthetic creativity with technical precision to deliver functional, energy-efficient spaces. Specialising in commercial, residential, and heritage projects, we manage the full design process from concept to construction.
Principal Designer Services
Under the Building Safety Act 2023, we offer principal designer services ensuring full compliance with building regulations. Our CIAT-registered team coordinates design elements, assesses safety standards, and provides expert guidance for both low and high-risk buildings up to 18m in height.
Energy Consultancy
Our energy consultancy reduces building operational costs and carbon emissions. Services include energy audits, Part L compliance, renewable energy integration, and BREEAM assessments. We develop tailored strategies for building portfolios and provide detailed sustainability reports for planning applications.
Sustainable Design
We specialise in sustainable building solutions that maintain aesthetic appeal while minimising environmental impact. Our expertise includes passive design technologies, renewable energy systems, and low-carbon material selection, ensuring projects meet modern efficiency standards without compromising design quality.
Modular Construction
Our modular construction services offer cost-effective, rapid-build solutions without sacrificing quality. We design prefabricated elements and complete modular buildings, optimising factory production and site assembly to deliver efficient, sustainable developments for commercial and residential sectors.
People
John Smith
Co-Founder & Chartered Architectural Technologist
John leads Cityzen's technical design team with 25+ years' experience in architectural technology and building services engineering. He specialises in regulatory compliance and sustainable building systems, holding CIAT accreditation as a principal designer assessor.
Charlotte Smith
Co-Founder & Sustainability Advisor
Charlotte brings expertise in BREEAM assessments and low-carbon strategies, previously advising on major sustainability projects. She focuses on integrating energy efficiency with architectural design, ensuring environmental standards meet practical building requirements.
Questions
What architectural services do you offer?
We provide full architectural design services including new builds, renovations, modular construction, and heritage restorations across commercial and residential sectors.
How do you ensure building regulation compliance?
Our CIAT-registered principal designers coordinate regulatory compliance, conducting detailed assessments and ensuring all designs meet current building standards and safety requirements.
What sustainability expertise do you have?
We offer energy audits, BREEAM assessments, renewable energy integration, and low-carbon design strategies to reduce buildings' environmental impact while maintaining design quality.
Do you work outside Brighton?
Yes, we operate across the UK including London, Oxfordshire, and Southern England, delivering projects for clients ranging from local authorities to international architects.