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Expert Architectural Services in Winchester
C3 Design is a dedicated architectural practice committed to delivering cost-effective design and construction solutions without compromising quality, creativity, or attention to detail. With 25 years of experience, we specialise in transforming residential and commercial spaces through a collaborative approach that prioritises client needs and budgetary constraints. Our expertise spans home extensions, refurbishments, orangeries, loft conversions, and listed building alterations, ensuring each project aligns with both aesthetic aspirations and functional requirements. We pride ourselves on empowering clients with knowledge, enabling informed decisions throughout the design and construction process. Our focus on innovation and practicality allows us to resolve complex challenges, such as balancing financial limitations with ambitious visions, while maintaining compliance with building regulations and energy efficiency standards.

Based in Winchester, Hampshire, we serve local and Central London clients, offering tailored solutions for diverse architectural needs. Our teams deep understanding of spatial planning, material selection, and sustainable design principles ensures every project maximises value and longevity. We are registered under the Architects Act 1997, reflecting our commitment to professional standards and ethical practice. Client testimonials highlight our efficiency, organisational skills, and ability to exceed expectations, with many projects completed seamlessly even under challenging conditions. As a small practice, we maintain a personal service, focusing on individual projects rather than business expansion, which has earned us repeat clients and industry recognition.
Services
Home Extensions Home Refurbishments Orangeries Loft Conversions Kitchen Remodelling Outdoor Buildings Annexes Landlord Consent Listed Buildings
Highlights and features
  • 25 years of experience ensures exceptional results aligned with client budgets.
  • Cost-effective solutions maximise budgets without sacrificing quality.
  • Design excellence combines creativity with functional, aesthetically pleasing spaces.
  • Tailored services address unique client visions and constraints.
  • Client-centric approach prioritises trust, transparency, and collaboration.
Associations and certifications
  • Architects Act 1997
What people say
Stress-free process Exceeded expectations Timely delivery Budget adherence Exceptional designs
Services
Home Extensions
Our home extension services enhance living space and property value through seamless integration with existing architecture. We prioritise functionality, natural light, and thermal efficiency, ensuring designs meet client lifestyles while complying with regulations. From concept to completion, we deliver tailored solutions that optimise space and aesthetics.
Home Refurbishments
We transform existing spaces with refurbishments that balance modern functionality and heritage preservation. Our approach addresses structural constraints and budgetary limits, incorporating sustainable materials and energy-efficient designs. We manage projects from planning to execution, ensuring compliance and minimal disruption for clients.
Orangeries
Orangeries provide year-round living space with enhanced thermal efficiency and privacy. We design bespoke structures that harmonise with property aesthetics, using strategic glazing and insulation. Our solutions maximise natural light while meeting energy regulations and client-specific needs.
Loft Conversions
We convert loft spaces into functional areas, optimising layouts for storage, living, or workspaces. Our designs comply with building regulations and address structural challenges, particularly in conservation areas. Bespoke planning ensures high-quality finishes and seamless integration with existing architecture.
Listed Buildings
Specialising in listed building alterations, we preserve historical integrity while meeting modern living standards. Our expertise includes navigating planning approvals, restoring fire-damaged structures, and extending thatched cottages. We balance conservation with innovative design to enhance usability and value.
People
Mark Benzie
Architect
Mark Benzie leads C3 Design with 25 years of architectural expertise, focusing on residential and commercial projects. His collaborative approach ensures client visions are realised efficiently, with testimonials praising his organisational skills and attention to detail. Mark specialises in navigating complex planning processes and delivering cost-effective, innovative designs.
Questions
What architectural services does C3 Design offer?
We specialise in home extensions, refurbishments, orangeries, loft conversions, kitchen remodelling, annexes, listed building alterations, and landlord consent projects, tailored to client needs and budgets.
How does C3 Design handle listed building projects?
We balance heritage preservation with modern functionality, navigating planning approvals and structural challenges to deliver compliant, aesthetically pleasing alterations for listed properties.
Can C3 Design work within tight budgets?
Yes, our cost-effective solutions prioritise value without compromising quality, using innovative design and resource efficiency to meet client financial constraints.
Do you serve areas outside Winchester?
We operate locally in Hampshire and Central London, offering tailored architectural services for residential and commercial clients across these regions.
How involved are clients in the design process?
We adopt a collaborative approach, involving clients in decision-making to ensure designs align with their vision, lifestyle, and practical requirements.