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.

1 achievement

Architect page

Florent LEONHARDT works on construction, renovation, rehabilitation, and restructuring projects in urban as well as suburban areas, including housing, residential buildings, workplaces, cultural and religious spaces, offices, educational or institutional facilities, as well as their outdoor extensions in the countryside, mountains, parks, and gardens.

27 property type

Single-Family Homes

Passive House / Eco-friendly

15 type of work

Extension

New Build

6 services

Design / Plans

Planning permission application

18 achievements

Architect page

ECLA Architectures is an architecture, design, and project management agency that is both plural and distinctive. Founded by Romain DESMON, the agency operates across various fields related to construction, complete renovation, transformation, and space planning throughout the Hauts-de-France region.

25 property type

Single-Family Homes

Passive House / Eco-friendly

16 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

5 achievements

Architect page

15 property type

Single-Family Homes

Chalets / Wooden Houses

12 type of work

Extension

New Build

5 services

Design / Plans

Planning permission application

Julien Grenot Architecture is a studio that designs contemporary spaces combining elegance, functionality, and well-being. From individual housing to prestigious tertiary projects, each realization reflects a subtle balance between aesthetics and pragmatism, with constant attention to materials, light, and client needs.

20 property type

Single-Family Homes

Passive House / Eco-friendly

8 type of work

Extension

New Build

4 services

Design / Plans

Planning permission application

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1 achievement

Sébastien Le Meur Architecte designs buildings where everyday quality of life is the top priority. Every project begins with careful listening to your needs, with the aim of creating architecture that is both bespoke and enjoyable to live in every day.

The best architectural solution is one that makes everyday life fluid, intuitive and enjoyable.

21 property type

Single-Family Homes

Passive House / Eco-friendly

10 type of work

Extension

New Build

3 services

Design / Plans

Planning permission application

Architect page

YZAA Architecture supports both private clients and professionals in their construction, renovation, and design projects with a strong focus on sustainability, responsibility, and a human-centered approach. The firm designs spaces that are aesthetic, functional, and environmentally conscious, tailored to your needs.

From concept to completion, YZAA guides you through your projects with listening, creativity, and commitment—creating spaces that are meaningful and built for the future. See you soon!

19 property type

Single-Family Homes

Passive House / Eco-friendly

16 type of work

Extension

New Build

5 services

Design / Plans

Planning permission application

4 achievements

ISARA Architectes associés designs living and working spaces that combine architectural excellence, quality of use, and everyday comfort. Each project is developed in dialogue with its inhabitants and users in order to respond as accurately as possible to their lifestyles, aspirations, and needs. Attentive to both the context and the expectations of each client, we develop tailored and custom-made architecture designed specifically for you.

21 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

PRADIER ARCHITECTE is an architectural practice registered with the Île-de-France Order of Architects. The firm designs bespoke residential, office, workshop, and public building (ERP) projects, tailoring every solution to the specific requirements of each client and site. Combining technical expertise, sustainability, and thoughtful design, the agency provides comprehensive architectural services for both new-build and renovation projects, from concept development and planning applications to construction supervision.

16 property type

Single-Family Homes

Passive House / Eco-friendly

11 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

3 achievements

V.G.A. – Vincent Gillot Architecture – is an architecture agency founded in Paris in the summer of 2020, committed to social and environmental innovation. In a world facing increasingly complex challenges, the agency believes in architecture’s ability to question the way we live, rethink our societies, and inspire new ways of inhabiting the world.

27 property type

Single-Family Homes

Passive House / Eco-friendly

11 type of work

Extension

New Build

5 services

Design / Plans

Planning permission application

1 achievement

Architect page

With more than 20 years of experience, Pascal DIEHL designs functional, sustainable and high-quality architectural projects, from private homes to industrial and technical buildings. Combining technical expertise, environmental performance and collaborative project management, the agency delivers tailored architectural solutions from concept to completion.

23 property type

Single-Family Homes

Passive House / Eco-friendly

8 type of work

Extension

New Build

6 services

Design / Plans

Planning permission application

1 achievement

Architect page

Coquille is an architectural practice founded in Finistère in 2026 by Elisabeth Biville.

Its practice takes its name from Paul Valéry’s text L’Homme et la coquille, which explores the relationship between a form and what gives rise to it.

Coquille pays particular attention to the uniqueness of each project and to its coherence with a context, culture and patterns of use shaped over time. Whether transforming, extending or building, the practice seeks to anchor each project within its environment, with careful consideration for the places, materials and people who bring them to life.

15 property type

Single-Family Homes

Passive House / Eco-friendly

9 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

Architect Thierry Penne specialises in bioclimatic, sustainable and environmentally-friendly architecture. Incorporating geobiology allows a return to the roots of architecture and the role of the home, as a place of rejuvenation, rest, comfort, development and harmony.

9 property type

Single-Family Homes

Apartment

8 type of work

Extension

New Build

4 services

Design / Plans

Planning permission application

We find
the architect for you

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Whether you’re an individual or business, in need of consulting services or a full turn-key project, experienced architect Anne-Brigette Caseau will propose a solution that fits your needs, goals and budget, with the goal of best adapting to her clients’ requests.

16 property type

Single-Family Homes

Passive House / Eco-friendly

13 type of work

Extension

New Build

4 services

Design / Plans

Planning permission application

3 achievements

After earning her degree and honing her skills with several Strasbourg-based architecture practices, Magalie De Oliveira founded her own business to leave her mark on the world of architecture. Concerned with the well-being of her clients, the architecture designs unique projects tailored to each one. 

14 property type

Single-Family Homes

Passive House / Eco-friendly

12 type of work

Extension

New Build

5 services

Design / Plans

Planning permission application

Krummenacher Architecture is ideally situated in the heart of the tri-border region. An architect with extensive experience, Éric Krummenacher's design approach is both inventive and precise, always leading to unique projects that meet the specifications and expectations of his clients.

10 property type

Single-Family Homes

Townhouses

9 type of work

Extension

New Build

4 services

Design / Plans

Planning permission application

Cédric Héry is an architect with extensive experience and is registered with the Order of Architects. He approaches architecture as a means of expressing his creativity, while remaining attentive to the world of tomorrow. His expertise and versatility allow him to work on a wide range of projects.

13 property type

Single-Family Homes

Passive House / Eco-friendly

8 type of work

Extension

New Build

4 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

10 achievements

Architect page

Like the mischievous ALICE in Wonderland, I try to solve an unsolvable equation to make the little star that once shone in a corner of your mind emerge from the ground.

17 property type

Single-Family Homes

Passive House / Eco-friendly

13 type of work

Extension

New Build

6 services

Design / Plans

Planning permission application

Studio LOH Architecture's expertise ranges from the renovation of existing buildings into low-energy housing, to the development of sustainable mobility in public spaces.

14 property type

Single-Family Homes

Passive House / Eco-friendly

14 type of work

Extension

Renovation

6 services

Design / Plans

Planning permission application

3 achievements

Architect page

With varied experience in agencies, Vincent d'Artemare specializes in projects for individuals and is keen to provide a fair response to each of the projects entrusted to him.

7 property type

Single-Family Homes

Passive House / Eco-friendly

11 type of work

Extension

New Build

5 services

Design / Plans

Planning permission application

17 achievements

Architect page

Architect specializing in the creation of individual houses, extensions and elevations and any other type of projects. She puts her expertise at the service of personalized projects, in close collaboration with her clients, to guarantee their satisfaction and well-being.

21 property type

Single-Family Homes

Passive House / Eco-friendly

14 type of work

Extension

New Build

4 services

Design / Plans

Planning permission application