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.

6 achievements

Architect page

With 26 years of experience designing and carrying out specific projects, Jean Christophe HARANQ offers expertise and creativity to those who need spaces that reflect their image, while respecting costs and the natural and built environment.

17 property type

Single-Family Homes

Passive House / Eco-friendly

9 type of work

Extension

New Build

5 services

Design / Plans

Planning permission application

3 achievements

HMONP architect based in Toulouse city centre, Lize DÉSIRÉ founded her own agency, Lize Désiré Architecte, after several years working as a project manager within a Toulouse-based architecture firm.

With extensive experience in renovation projects, she knows how to enhance existing buildings while respecting their history and environment. Since January 2026, the agency has been a member of Envirobat Occitanie, a regional network of professionals committed to sustainable buildings

25 property type

Single-Family Homes

Passive House / Eco-friendly

17 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

5 achievements

Architect page

Development of projects in many areas of construction: housing, cultural, sports, administrative, school and catering buildings.

From sketch phases to on-site execution phases until completion.

15 property type

Single-Family Homes

Chalets / Wooden Houses

13 type of work

Extension

New Build

5 services

Design / Plans

Planning permission application

1 achievement

Architect page

With more than 30 years of experience, Philippe BIAU supports homeowners, businesses, and public organisations with construction, renovation, and refurbishment projects. His architectural approach combines design excellence, technical expertise, attentive client support, and sustainable solutions carefully tailored to the unique context of every project.

25 property type

Single-Family Homes

Passive House / Eco-friendly

12 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

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1 achievement

Architect page

Quentin HERRGOTT’s architectural firm has been established in the Annecy region since 1999 and has completed a large number of new-build and renovation projects, ranging from individual homes to collective residential developments. The agency has significant experience in restructuring projects and major renovations of villas, whether old or contemporary. Attentive to his clients, Quentin provides valuable advice and seeks to optimize budgets in favor of coherent and meaningful architecture.

25 property type

Single-Family Homes

Passive House / Eco-friendly

16 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

1 achievement

Architect page

At WAKA, every project is an opportunity to design spaces focused on well-being, respecting living environments and creating a lasting connection with their territory. Through construction expertise, thoughtful material choices and careful work on natural light, the agency’s approach aims to create architecture that is simple, harmonious and timeless.

27 property type

Single-Family Homes

Passive House / Eco-friendly

14 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

5 achievements

Architect page

Atelier Bebo manages every stage of the project, from design to completion. It focuses on the needs of the project owners to best support them and provide them with tailor-made, functional solutions that are optimized for their budget.

22 property type

Single-Family Homes

Smart Homes

16 type of work

Extension

New Build

6 services

Design / Plans

Planning permission application

5 achievements

Architect page

For a pleasure to live in. All our constructions are different because each of us is unique in a particular site. Let's create together your ideal living space specific to your desires and your lifestyle.Your dream, our passion

21 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

6 achievements

Dali Architecture is an architecture, design and project management agency in Strasbourg for professionals, investors and individuals. We travel within a 1 hour radius of Strasbourg to respond to your project.

24 property type

Single-Family Homes

Passive House / Eco-friendly

15 type of work

Extension

New Build

6 services

Design / Plans

Planning permission application

4 achievements

Founded in 2018, the Lylian Ollivier Architecte agency is based in Granville and is made up of 7 employees. It is distinguished by an approach combining architecture and construction economics.

18 property type

Single-Family Homes

Passive House / Eco-friendly

13 type of work

Extension

New Build

3 services

Design / Plans

Planning permission application

1 achievement

The architecture agency Isabelle CALVET-CHARET, founded in 1997 in Béziers, benefits from more than 25 years of experience. A graduate of the Montpellier School of Architecture with Jury Honors, Mrs. CALVET-CHARET has built a multidisciplinary practice capable of managing a wide range of public and private projects.

17 property type

Single-Family Homes

Chalets / Wooden Houses

11 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

Architect page

An architect who has specialised over the years in individual housing, in new buildings, renovations and extensions... without excluding collective housing. Philippe Prevost proposes contemporary architecture, simple and open, using as much as possible healthy and natural materials.

11 property type

Single-Family Homes

Passive House / Eco-friendly

12 type of work

Extension

New Build

4 services

Design / Plans

Planning permission application

We find
the architect for you

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Architect page

Founded in 2016 in Nantes by Raphaël Fichet, a graduate of the Nantes School of Architecture (2005), FARLAB was born after years of collaboration with renowned architectural firms. At FARLAB, their knowledge — gained through hands-on experience and professional practice — ensures expertise, flexibility, and precision. Their mission is to design spaces that reflect who you are, conceived to stand the test of time.

25 property type

Single-Family Homes

Passive House / Eco-friendly

13 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

3 achievements

Marie SAVALLE

MASAA

4 Opinions

Architecte in Nantes 44000

Architect page

MASAA, a member of the Archipel 5 collective, brings together six architects with complementary expertise in renovation, interior architecture, medical facilities, schools, childcare spaces and residential projects. Together, they design tailor-made, functional and aesthetic spaces carefully developed around the needs, lifestyles and expectations of each client.

12 property type

Single-Family Homes

Passive House / Eco-friendly

11 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

3 achievements

Nora MOLITOR

Studio Moben

3 Opinions

Architecte in Lille 59260

Architect page

Studio Moben is a family architecture agency specializing in contemporary homes, bespoke renovations, and high-end residential projects. Founded by Nora Benkahla and Adrien Molitor, the agency supports clients at every stage, from pre-purchase advice to final delivery—with a global, sustainable, and personalized approach.

Through sensitive design, technical expertise, and strong environmental awareness, Studio Moben creates unique living spaces built to last and adapt to modern lifestyles. Their turnkey support, including administrative procedures, contractor selection, and 3D visualizations, allows every life project to come to life with confidence and peace of mind.

21 property type

Single-Family Homes

Passive House / Eco-friendly

15 type of work

Extension

New Build

7 services

Design / Plans

Planning permission application

1 achievement

Architect page

Independent HMONP architect based in Bagnères-de-Bigorre, in the French Pyrenees, Jules NENY supports homeowners and condominium associations with energy-efficient renovations, sustainable construction using timber, straw, and earth, and self-sufficient housing projects. From pre-purchase advice and planning applications to construction supervision, he provides comprehensive guidance grounded in technical expertise, environmental responsibility, and honest, practical advice.

21 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
Architect page

Aware that a construction for individuals is often a “life project”, that the identity of the layout/creation of a professional space must be unique, Mathilde SADRAN is there to support you through all phases of your project.

23 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

Architect page

Open to all types of programs since its creation in 1998, ALFA Architecture has constantly evolved around one guiding principle: the thoughtful design of spaces for living. Driven by a pursuit of clarity and purpose, each project becomes an exploration of the firm’s core concerns — the environment, humanity, light, materials, and landscape.

21 property type

Single-Family Homes

Passive House / Eco-friendly

14 type of work

Extension

New Build

6 services

Design / Plans

Planning permission application

Julien CASTEL, architect graduated from ENSA Strasbourg and certified HMONP, supports both private individuals and professionals in their renovation, extension, and new construction projects. His agency develops sustainable and tailor-made architecture, integrating energy performance, bio-based materials, and comprehensive support throughout every phase of the project.

21 property type

Single-Family Homes

Passive House / Eco-friendly

14 type of work

Extension

New Build

6 services

Design / Plans

Planning permission application

3 achievements

Whether your project is of a few m², whether it is a renovation project, the construction of an individual house, or a larger project, the agency supports you to find a fair response adapted to your needs. problematic.

16 property type

Single-Family Homes

Passive House / Eco-friendly

11 type of work

Extension

New Build

5 services

Design / Plans

Planning permission application