607 architects Extension

Extension Architect

A home is one of the most precious assets a person can own. Taking care of it is akin to taking care of oneself. A true living space, a home adapts to the needs of its owners and sometimes requires work to be carried out — including the addition of an extension.

Whether built to gain extra living space, attached to the existing home, or added as an upper storey, an extension serves more than one purpose.

To achieve a functional home extension that matches your vision, a specialist architect is your greatest ally.

Why choose a specialist architect for your home extension?

An architect is not always mandatory for a home extension project. However, calling on this building, construction, and renovation professional brings a number of significant advantages.

An extension in harmony with your home
Adding an extension to your home comes with many challenges. The first is creating a space that is in perfect harmony with your existing home and living environment. Whether in terms of exterior or interior cohesion, working with an architect allows you to choose the type of extension, the materials, and the construction style — ensuring the new space integrates seamlessly with your home.

A project tailored to your budget
A home extension is a project that requires careful planning from the outset. Between site preparation, materials, and labour, expanding your living space requires a considerable budget.

An architect can assist you as the project manager. They design the plans, oversee the works, and coordinate the various tradespeople — all while working within your budget. The best way to avoid unwelcome surprises.

Achieving a functional and practical space
A home extension is more than just extra floor space attached to a main building or added on top of it. Above all, it must be functional and comfortable. Whether it's a conservatory, a garage, or an additional room, the specialist architect carries out the work so that the extension fulfils its primary purpose.

Insulation, natural light, electrical wiring, built-in storage — your new room is immediately ready to use.

3 achievements

Clef Architecture is an architecture and interior design agency founded by two professionals united by a shared vision: designing tailor-made, functional, and sustainable spaces. The agency supports both individuals and businesses in their construction, renovation, and design projects.

9 property type

Single-Family Homes

Chalets / Wooden Houses

9 type of work

Extension

New Build

4 services

Design / Plans

Planning permission application

1 achievement

GB Design & Concept specialises in the design of contemporary spaces, developing bespoke projects that combine functionality, aesthetics and technical coherence. Our approach places a strong emphasis on materials, light and the way spaces are used, creating durable, elegant environments that are carefully considered down to the finest detail.

9 property type

Single-Family Homes

Smart Homes

6 type of work

Extension

Renovation

5 services

Design / Plans

Planning permission application

Architect page

Interia Construction designs and transforms high-end spaces in Paris and the Île-de-France region: first through architecture and design, then through execution, with the same team and the same level of excellence. Created in 2019 and led by three complementary partners, this human-sized structure places high standards, flexibility and proximity at the heart of every project.

24 property type

Single-Family Homes

Passive House / Eco-friendly

15 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

2 achievements

Architect page

27 property type

Single-Family Homes

Passive House / Eco-friendly

9 type of work

Extension

New Build

5 services

Design / Plans

Planning permission application

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SAAP Architecture designs bespoke, sustainable, and well-considered projects for private clients, companies, and public authorities. The practice works on renovation, transformation, and new-build projects with rigor, attentiveness, and a strong sense of place—always closely connected to the context of the site and the project.

14 property type

Single-Family Homes

Passive House / Eco-friendly

10 type of work

Extension

New Build

4 services

Design / Plans

Planning permission application

Architect page

Cheze Architectes designs projects by adapting to a wide range of uses, contexts, and constraints. The agency develops a direct and committed approach, with a single point of contact throughout the project, and strong experience in collective housing that is now applied to diverse programs, from residential to commercial and activity-based projects.

11 property type

Multi-unit Residential

Retail

9 type of work

Extension

New Build

5 services

Design / Plans

Planning permission application

A licensed architect (HMONP) working independently since 2025, Adonis EL HUSSEINI leverages his experience in architectural firms to support a wide range of projects with an approach that is both sensitive, innovative, and grounded in reality. He chose to establish his practice in Vendée, a region he is particularly attached to, while also developing his activity at a national and even international scale.

14 property type

Single-Family Homes

Chalets / Wooden Houses

12 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

Since 2007, Corentin DESMICHELLE’s studio has been developing an architecture of restraint at every scale, from individual housing to public facilities. Specializing in passive design and the use of bio-based materials, he favors an ecosystem-based and circular approach. Whether for new builds or the renovation of historic structures, each project is conceived as a living resource reserve, aiming for environmental excellence and zero waste.

27 property type

Single-Family Homes

Passive House / Eco-friendly

15 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

Together
we can define your project

Make a free appointment with our specialist advisor.

Request a meeting
On trouve l'architecte pour vous

5 achievements

Maxime BANNIER designs bespoke projects based on a strong, practical expertise in timber construction. He supports each project with method and high standards, transforming your ideas into a coherent project tailored to your lifestyle and budget.

10 property type

Single-Family Homes

Passive House / Eco-friendly

9 type of work

Extension

New Build

6 services

Design / Plans

Planning permission application

2 achievements

Based in Anduze, Belle Ville Atelier d’Architecture supports renovation, extension, and construction projects throughout the south of France and beyond. With more than ten years of experience, the agency has developed a demanding and tailor-made approach, shaped by a practice built in Paris and now applied to projects of various scales.

24 property type

Single-Family Homes

Passive House / Eco-friendly

10 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

1 achievement

Nicolas Gratier Architecte is a firm based in Francin (73800), specialized in the design and realization of architectural projects in Savoie, Isère, and Haute-Savoie. The agency supports both private and professional clients in a variety of projects: villa construction, renovations, extensions, commercial rehabilitations, and small collective housing developments. The firm stands out through its tailor-made approach, attentive to each client’s needs and to the specific characteristics of the region. Committed to quality, it places particular importance on respecting budgets and deadlines, ensuring controlled, sustainable projects adapted to contemporary uses.

20 property type

Single-Family Homes

Chalets / Wooden Houses

10 type of work

Extension

New Build

3 services

Planning permission application

Construction Management

1 achievement

Architect page

HMONP-qualified architect based in Paris, I support private clients and professionals in the design and transformation of their spaces, with a sensitive, contemporary approach tailored to how they are used. Every project is conceived as a bespoke response, from the initial sketch through to completion.

20 property type

Single-Family Homes

Passive House / Eco-friendly

9 type of work

Extension

New Build

6 services

Design / Plans

Planning permission application

We find
the architect for you

Search
On trouve l'architecte pour vous

1 achievement

Architect page

Anais NGANDA is an architect offering personalized architectural services, from home extensions and major renovations to planning regularization and construction supervision. With a clear, client-focused approach, she delivers practical, creative and accessible solutions tailored to every project.

11 property type

Single-Family Homes

Passive House / Eco-friendly

11 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

2 achievements

Architect page

Architect & Interior Architect | Hospitality & Residential

Design & Construction Management

Trained at several leading Parisian architecture firms, I design and manage exceptional projects that live up to your ambitions. Every space is defined by its details — I bring the same high standards to every project, through to completion.

I work closely with each client with creativity and precision, delivering unique projects that are carefully considered down to the finest detail and executed with the utmost care.

15 property type

Single-Family Homes

Passive House / Eco-friendly

13 type of work

Extension

New Build

6 services

Design / Plans

Planning permission application

1 achievement

Architect page

Our profession is our passion, and our commitment is wholehearted. We share an important chapter of our clients’ lives with them.

Our clients are our best ambassadors and strongest advocates because, in the age of AI, the human connection matters more than ever. We are there at every stage of reflection, decision-making and coordination, ensuring that our clients feel supported and guided throughout their project.

20 property type

Single-Family Homes

Passive House / Eco-friendly

11 type of work

Extension

New Build

6 services

Design / Plans

Planning permission application

7 achievements

MMA is a Paris-based architecture and interior design practice founded in 2024 by architect Matteo Malatesta, following 14 years of international experience working alongside renowned architects such as Massimiliano Fuksas, Jean-Michel Wilmotte and Dietmar Feichtinger.

From new-build projects to renovations, the practice works in France and internationally on projects of varying scales and programmes, from initial design through to site supervision.

Its expertise covers residential projects, private homes, public facilities, cultural venues, hospitality and commercial spaces.

MMA upholds the high standards and commitment that have shaped this career, with a desire to create distinctive buildings and spaces that respond to the needs and aspirations of each client.

14 property type

Single-Family Homes

Passive House / Eco-friendly

9 type of work

Extension

New Build

5 services

Design / Plans

Planning permission application

Together
we can define your project

Make a free appointment with our specialist advisor.

Request a meeting
On trouve l'architecte pour vous
Architect page

Based in Ciboure, in the French Basque Country, Atelier Ondra is an architectural practice that develops projects rooted in their context, existing buildings, and everyday uses. Combining research, innovation, design, and architecture, the studio creates thoughtful, balanced, and sustainable solutions for residential, commercial, and property development projects, including renovations, new constructions, and adaptive reuse.

24 property type

Single-Family Homes

Passive House / Eco-friendly

12 type of work

Extension

New Build

6 services

Design / Plans

Planning permission application

2 achievements

Architect page

Architects & Interior Architect: a synergy that offers a wide range of solutions for your projects.

From new-build and rehabilitation projects to renovations of office buildings, residential properties and public-access buildings (retail spaces, schools), as well as hotels and more, each project is developed around a shared ambition: turning your goals and aspirations into reality, together.

18 property type

Single-Family Homes

Passive House / Eco-friendly

9 type of work

Extension

New Build

6 services

Design / Plans

Planning permission application

1 achievement

Architect page

Architecture practice based in Paris since 2023, Celante works on new-build and refurbishment projects. Its practice is shaped by extensive experience in collective housing and extends to a range of programmes and scales. From design through to completion, the practice provides support tailored to the needs and context of each project.

16 property type

Single-Family Homes

Passive House / Eco-friendly

8 type of work

Extension

New Build

4 services

Design / Plans

Planning permission application

1 achievement

GLAD is an architecture practice based in Vitré, with a branch office in Rennes. Our approach is rooted in Reasoned and Local architecture, guided by Expertise and Integrity.

“We advocate an architecture that seeks to engage with its context while finding a balance between economic realities and today’s environmental challenges.

We believe in an architecture that is attentive to what already exists and respectful of the resources of its territory.

We place great importance on working with its unique qualities and resources, both natural and built, as well as with the people and communities involved.

We strive for architecture based on common sense, sensitivity and durability. Pragmatic and elegant, it is designed to stand the test of time and to offer places and the people who inhabit them the opportunity to thrive, with the ambition of making them happier.”

“Look before you draw. Listen before you build. An architecture of attentiveness, shaping the identity of your project.”

13 property type

Single-Family Homes

Passive House / Eco-friendly

8 type of work

Extension

New Build

6 services

Design / Plans

Planning permission application