Who we are...

CDJM Architects.

We are a Wimbledon-based studio of RIBA & ARB accredited architects, specialising in carefully crafted homes, extensions and new-build residential projects.

Led by husband and wife team Cecilia D’Avolio & Jonathan Mills, we create bold, intelligent architecture that adds lasting value, from early concept and planning through to delivery on site.

What we can do for you

Residential Extension & New Build Architects

We help homeowners and developers across Wimbledon and greater London design, plan and deliver beautiful residential projects, from initial concept to construction on site.

Working with RIBA & ARB accredited architects, you are fully supported at every stage of your project.

Our architectural services include:

House extensions & loft conversions
Full home refurbishments
New-build residential homes
Planning applications & design development
Technical drawings & construction packages
On-site project support
Builder/contractor liaison
Project handover upon completion

Whether you are upgrading your family home or developing a new property, we focus on maximising space, light, build quality and long-term value while guiding you smoothly through the planning and construction process.

Every project is driven by quality, clarity and close collaboration, ensuring your home is both beautiful and buildable.

What we can do for you...

Architect Services

01.

Extensions & Conversions

We design high-quality house extensions that transform how you live in your home. From sensitive side and rear extensions to multi-storey transformations, we help homeowners unlock space, light and long-term value through thoughtful, well-crafted design.

02.

Bespoke New Build Homes

We design and deliver bespoke one-off homes for private clients and developers, from individual family houses to small residential developments. Our service covers the full journey from concept design and planning through to detailed technical design and delivery on site.

03.

Planning & Design Strategy

Using our extensive planning experience, we provide clear design-led planning strategies, feasibility studies and development advice to maximise the potential of your site and improve the chances of securing planning approval across Wimbledon and London.