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19 Years
experience
Residential Architects in Kew | Maria Demargne Architects
Maria Demargne Architects specialises in creating beautifully designed, naturally lit spaces that harmonise with modern living requirements while prioritising environmental sustainability. With over two decades of experience since 2001, our practice has developed a reputation for delivering tailored architectural solutions across residential projects in conservation areas. Our approach combines sensitivity to historical contexts with contemporary design principles, ensuring each project aligns with individual client needs, building characteristics, and budgetary considerations. Founded by Maria Demargne, who graduated from E.T.S.A.B. Barcelona in 1997 and holds a Masters in Environmental Design from the University of Cambridge, we bring technical expertise and creative vision to every commission.

Our track record of 160 completed projects demonstrates our commitment to quality, with many clients returning for repeat collaborations. We maintain strong relationships with trusted contractors, consultants, and suppliers to ensure seamless project execution from concept to completion. Our services encompass full renovations, extensions, loft conversions, basement developments, and comprehensive project management, all underpinned by a dedication to sustainable design practices. Operating across Kew, Richmond, and West London, we combine local knowledge with international architectural perspectives to deliver spaces that enhance both functionality and aesthetic value for our clients.
Services
Residential Projects Full Renovations Extensions Loft Conversions Basements Landscaping Garden Buildings Sustainable Design Commercial Services Project Management
Details
  • Year established: 2007
Highlights and features
  • 160+ completed residential projects since 2007
  • Specialists in conservation area developments
  • Sustainable design integrated into every project
  • Comprehensive services from concept to completion
  • Established network of trusted contractors and consultants
Services
Residential Projects
We specialise in creating tailored residential solutions that balance aesthetic appeal with functional requirements. Our expertise includes navigating planning constraints in conservation areas while delivering modern, sustainable living spaces. Each project benefits from our deep understanding of architectural heritage combined with contemporary design principles to enhance property value and usability.
Full Renovations
Our comprehensive renovation services transform properties through strategic spatial reconfiguration and material selection. We focus on improving energy efficiency and natural lighting while maintaining structural integrity. Clients receive end-to-end support from initial concept development through to construction supervision, ensuring seamless execution of their vision.
Extensions
We design single or multi-storey extensions that enhance building functionality while respecting existing architectural character. Our approach considers environmental impact and natural light integration, creating spaces that improve both aesthetics and practical usage. Each extension is carefully planned to maximise spatial efficiency and visual harmony.
Loft Conversions
Our loft conversion solutions optimise underutilised space to create functional living areas. We incorporate daylighting strategies and energy-efficient design to reduce running costs. The process includes structural assessments, planning applications, and detailed construction management to deliver safe, compliant conversions that add significant property value.
Project Management
We provide end-to-end project management covering planning approvals, technical design, contractor coordination, and quality control. Our services include tender package preparation, building control submissions, and on-site supervision to ensure projects meet design specifications, budget constraints, and regulatory requirements while maintaining our high standards of craftsmanship.
People
Maria Demargne
Architect
Maria graduated from E.T.S.A.B. Barcelona in 1997 and holds a Masters in Environmental Design from the University of Cambridge. With over 20 years' experience in residential architecture since joining NRA architects, she established her practice in 2001, specialising in conservation area projects and sustainable design solutions.
Questions
What architectural services do you specialise in?
We focus on residential projects including full renovations, extensions, loft conversions, and basement developments, with particular expertise in conservation area work across Kew, Richmond, and West London.
How do you approach conservation area projects?
Our approach combines sensitivity to historical contexts with modern design principles, ensuring proposals respect architectural heritage while meeting contemporary living standards through careful material selection and spatial planning.
What sustainable design features do you incorporate?
We integrate natural lighting strategies, energy-efficient materials, and passive design principles to reduce environmental impact while enhancing building performance and occupant comfort across all project types.
Can you manage projects from start to finish?
Yes, we provide comprehensive services covering initial brief development, planning applications, technical design, contractor selection, and construction supervision to ensure seamless project delivery.
How long does a typical project take?
Project duration varies by scope but typically ranges from 6-12 months including planning and construction phases, with regular client updates maintained throughout the process to ensure alignment with expectations.