576 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.

Architecte in Monticello 20220

Atelier Barrachina is an architecture studio founded in 2023, working on renovation, new construction and development projects for private and public clients. Each project is based on a careful reading of the existing context, site and uses. Thanks to a dual background in architecture and spatial design, the studio designs tailor-made projects conceived in their entirety. It offers comprehensive support, from design to administrative procedures and site supervision, within a relationship of proximity and trust.

25 property type

Single-Family Homes

Passive House / Eco-friendly

Chalets / Wooden Houses

14 type of work

Extension

New Build

Renovation

5 services

Design / Plans

Planning permission application

Construction Management

Architecte in Caraman 31460

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

Chalets / Wooden Houses

12 type of work

Extension

New Build

Renovation

7 services

Design / Plans

Planning permission application

Construction Management

Architecte in NANTES 44000

The architects at the firm i-mag accord themselves the freedom to create innovative architecture, taking into account all the various environmental factors and constraints they may encounter. 

12 property type

Single-Family Homes

Chalets / Wooden Houses

Townhouses

10 type of work

Extension

New Build

Renovation

3 services

Design / Plans

Planning permission application

Construction Management

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Architecte in Nantes 44000

JUILLET ARCHITECTURE is a transdisciplinary agency with varied scales of intervention allowing it to respond to all needs, through an architecture anchored in current issues.

13 property type

Single-Family Homes

Townhouses

Country Homes

14 type of work

Extension

New Build

Renovation

5 services

Design / Plans

Planning permission application

Construction Management

Architecte in Brié-et-Angonnes 38320

Atelier INTI Architecture is an architecture agency based in Brié-et-Angonnes in Isère. We carry out ERP public building projects, individual houses, collective housing and mountain projects.

9 property type

Single-Family Homes

Chalets / Wooden Houses

Multi-unit Residential

9 type of work

Extension

New Build

Renovation

3 services

Design / Plans

Planning permission application

Construction Management

Architecte in Cabriès 13480

The ANO Studio architecture agency offers all types of architectural and interior design missions: construction, renovation, extension, planning advice, etc.

From the filing of a Building Permit to site monitoring, Adèle BOGHOSSIAN supports you on your future apartment, house, restaurant, shop, offices, etc. project.

12 property type

Single-Family Homes

Townhouses

Country Homes

12 type of work

Extension

New Build

Renovation

4 services

Design / Plans

Planning permission application

Construction Management

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On trouve l'architecte pour vous

Architecte in La Trinité-sur-Mer 56470

The agency develops creative, functional architecture that respects Breton heritage. Based in Morbihan, it combines a humanist approach, vernacular reinterpretation, landscape integration, and budgetary control, with constant attention to the environment, local culture, and customs.

17 property type

Single-Family Homes

Passive House / Eco-friendly

Chalets / Wooden Houses

13 type of work

Extension

New Build

Renovation

6 services

Design / Plans

Planning permission application

Construction Management

Architecte in Uriage 38410

L’Agence Spatiale is an architecture and interior design firm focused on eco-design, located in Uriage near Grenoble, in the Auvergne-Rhône-Alpes region. It works on renovation, extension, elevation, construction, and interior design projects.

17 property type

Single-Family Homes

Passive House / Eco-friendly

Chalets / Wooden Houses

15 type of work

Extension

New Build

Renovation

6 services

Design / Plans

Planning permission application

Construction Management

Architecte in Hœnheim 67800

Althea Architecture, founded in 2025, is a young, ambitious, and human-centered firm based near Strasbourg. Their vision looks toward the future: to create architecture that is thoughtful, sustainable, and meaningful.They work across a wide range of programs — residential, office, industrial, public facilities, and mixed-use projects — always with the same commitment: to find the most fitting, context-sensitive, and resource-conscious solution.Convinced that what already exists is valuable, they prioritize renovation over demolition, preserving what can be saved and giving new life to buildings. From feasibility studies to on-site supervision, they offer comprehensive project support, working with a trusted network of skilled partners to ensure coherent, high-quality results.

21 property type

Single-Family Homes

Passive House / Eco-friendly

Chalets / Wooden Houses

12 type of work

Extension

New Build

Renovation

4 services

Design / Plans

Planning permission application

Construction Management

5

Architecte in Héric 44810

ARCHI’MAKER is an architecture firm based in the Nantes region, promoting the use of bio-based materials and bioclimatic architecture. Located in Héric, the agency operates within a 50 km radius on various types of projects, including residential buildings (new and renovation), offices, and public facilities. It supports you from design through to project handover.

17 property type

Single-Family Homes

Passive House / Eco-friendly

Chalets / Wooden Houses

8 type of work

Extension

New Build

Renovation

4 services

Design / Plans

Planning permission application

Construction Management