Architecture services for London homes

Studio CMA helps London homeowners improve period and existing homes through renovation, extension, retrofit and architectural interiors.

At Studio CMA, we create homes that are calm, characterful and built to last. Our work is grounded in careful listening, rigorous design, and a belief that buildings should feel as good as they look.

From light-filled extensions to deep retrofits and elegant interiors, we help you shape a home that reflects your life and values—quietly sustainable, beautifully made, and tailored to its context.

We’re a husband-and-wife architecture practice based in London, combining vision and detail, creativity and care. Whether you’re just starting to explore a project or ready to build, we’re here to guide you through it.

Learn more about our story and approach.

Greg Mathers and Daniela Ciarcelluti of Studio CMA in their London architecture studio, surrounded by material samples and design references.

What We Offer

We offer a complete architectural service that brings together design, detail and sustainability. Whether you’re extending a family home, renovating a period property, or planning a low-energy new build, we help you shape spaces that feel calm, intelligent and beautifully made.

Our services work together—or stand alone—to support you at every stage of your project, from first idea to final finish:

  • Architecture — Thoughtful, design-led buildings tailored to how you want to live.

  • Interiors — Natural, refined spaces where materials, light and function meet.

  • Retrofit — Energy-efficient upgrades for homes with character and future value.

Each project is different. That’s why we listen carefully, work collaboratively, and design with care—so your home reflects not just your needs, but your values.

Aerial view of zinc-clad extension and landscaped garden, designed to feel immersed in surrounding trees

Full Architectural Service

Renovations, extensions and reconfigurations, guided from early ideas to construction

If you are planning a larger change to your home, you need more than drawings. You need a clear route through the decisions that shape cost, planning, design quality and construction.

Our Full Architectural Service is for homeowners planning renovations, extensions, reconfigurations and more complex home projects. We help you understand what is possible, develop the design, prepare the information needed for planning and construction, and guide the project through the key stages.

This is where whole-house thinking matters most. An extension affects light in the original rooms. A new kitchen affects storage, circulation and services. Insulation affects ventilation and moisture. We help these decisions work together, so the finished home feels coherent rather than pieced together.

This may include:

  • Early briefing, feasibility and design options

  • Planning applications and conservation area advice

  • Developed design, layouts, materials and key details

  • Technical drawings and information for builders

  • Tender support, contractor selection and construction-stage guidance

Ideal for:
Homeowners planning a renovation, extension, reconfiguration or larger home project who want careful design thinking carried through from the first ideas to the build.

Not sure where to start?
Many clients begin with an Architect’s Home Visit & Appraisal: a structured first step that helps you understand what is realistic, what matters most and how best to move forward.

Explore the Full Architecture Service

Start with an Architect’s Home Visit & Appraisal →

Architectural Interiors

Kitchens, bathrooms, joinery and materials considered as part of the whole home

Interiors are not just the final layer of a project. They shape how your home works every day: where things are stored, how rooms feel, how light is used and how materials come together.

Our Architectural Interiors service focuses on the parts of the home where design decisions become most personal and practical. Kitchens, bathrooms, joinery, storage, lighting and finishes are considered alongside the architecture, not added at the end.

This helps create rooms that feel calmer, more useful and more coherent. The aim is not decoration for its own sake. It is to make the spaces you use every day feel better resolved, easier to live in and more connected to the rest of the home.

This may include:

  • Kitchen, bathroom and utility layouts

  • Bespoke joinery, storage and fitted furniture

  • Lighting, switches and everyday use of rooms

  • Natural materials, finishes and colour palettes

  • Coordination between interiors, architecture and construction details

Ideal for:
Homeowners who want the inside of their home to feel calm, practical and carefully resolved, with materials, storage, lighting and details designed as part of the wider architectural thinking.

Explore Architectural Interiors 

Installer fitting woodfibre insulation boards to internal wall during sustainable retrofit

Retrofit Architecture

Warmer, healthier, lower-energy homes, upgraded with care

Older homes can often be made warmer, healthier and less wasteful to run, but retrofit decisions need to be made in the right order. Insulation, windows, ventilation, airtightness and heating all affect one another.

Many projects are designed around minimum building regulations compliance. Retrofit needs a more joined-up benchmark. Before choosing products or construction details, it helps to define what the home is being improved towards: a recognised standard, better comfort, lower energy use, healthier air, safer moisture management, sensible phasing or a clearer long-term outcome.

Our Retrofit Architecture service helps you make those decisions as part of the wider design of your home. We look at how heat, air, moisture, materials, layout and construction work together, so upgrades reduce problems rather than create new ones.

This may include:

  • Retrofit design for period and existing homes

  • Insulation, ventilation, windows and airtightness advice

  • Moisture-risk thinking for solid-wall and older buildings

  • Energy, comfort and performance targets considered together

  • Retrofit design integrated into renovation, extension or whole-home projects

Ideal for:
Homeowners who want to make an existing or period home warmer, healthier, more comfortable and lower-energy, while avoiding piecemeal upgrades that do not work well together.

Starter route:
Many clients begin with the Retrofit Strategy Service. This defines the right retrofit direction before major design or construction decisions are made, whether the project is aiming for a recognised standard, a comfort-led upgrade or an outcome-led strategy.

Start with the Retrofit Strategy Service 

Let’s Talk About Your Home

Whether you're thinking about extending, retrofitting or starting fresh, we’d love to hear about your plans.

Or learn more about our story and approach.

Common Questions About Our Services

Whether you're thinking about extending, retrofitting or starting fresh, we’d love to hear about your plans. Book a consultation or send us a message to get started.