Why add another story? Because pushing out the walls is no longer enough.
A vertical extension is the ideal solution for creating a completely new space.
Adding a story allows you to add up to 100 m² of living space while modernizing the architecture of your home, whether it's old or contemporary:
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A master suite worthy of a hotel
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Two additional bedrooms for the family
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An office, a studio, a game room
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A reinvented, more contemporary architecture
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A house that instantly increases in value
You no longer suffer from space: you create it.
Our method: fast, reliable, no surprises.
BRICK Renovation masters building extensions with an approach combining engineering, architecture and project management.
Structural and Technical Feasibility
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Load-bearing capacity assessment of walls and foundations
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Checking the condition of the framework
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Analysis of the permissible loads of the building
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Site access constraints and the Local Urban Development Plan (PLU)
This study guarantees the safety, durability and compliance of your project.
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Timber frame construction: a lightweight method ideal for older buildings, quick to implement, excellent thermal performance
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Traditional concrete/masonry: aesthetic continuity, high thermal inertia, robust for recent buildings, compatible with heavy roofs (tiles, slates)
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Steel: ideal for large spans with complex volumes and designs
Multiple Lifting Techniques
Exterior Envelope: Insulation, Airtightness and Light
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External thermal insulation (ETI) or internal thermal insulation, treatment of thermal bridges
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Waterproofing with high-performance membranes, specific treatment of upstands, joints and critical points, compliance with DTU standards and professional rules
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Bringing in natural light through optimized openings, roof windows (Velux type), vertical frames, skylights, light wells
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Price guaranteed
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Coordination of the construction site and our certified tradespeople
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Rigorous adherence to the schedule ensures on-time delivery.
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Fixed adherence to the agreed budget
Turnkey Support
How much does a house extension cost in 2026?
Our experience allows us to anticipate the constraints specific to this sector and to offer you a sustainable, profitable result aligned with your image. Costs vary according to the process, site accessibility, structural complexity and level of finish.
A controlled investment and an immediate return in comfort and asset value.
Average prices in 2026 (depending on process & finishes):
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Timber frame extension: €1,800 to €2,800/m²
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Traditional masonry extension: €2,200 to €3,400/m²
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Steel extension: €2,000 to €3,200/m²
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Structural feasibility study: €900 to €3,000 depending on surface area and complexity
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Planning application: €600 to €2,000
Indicative prices excluding additional foundations, stairs or specific fittings.
The value of your home often increases by 10 to 30% upon delivery.
BRICK Renovation provides a clear, detailed and reliable quote from the study phase.
A legally compliant extension. You're covered
As part of the turnkey management of your building extension project, we take care of the entire regulatory and urban planning framework
Mandatory Authorizations
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Building permit required if floor area created > 20 m²
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Prior notification for certain specific cases
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Compliance with the Local Urban Development Plan (maximum height, appearance, setbacks, easements)
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Possible consultation with the Architects of the Buildings of France
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Thermal compliance (applicable RE)
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Ten-year warranty
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Structural damage insurance (DO)
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Compliance with DTU standards, Eurocodes and professional rules
Insurance
and Guarantees
A single point of contact for a project built on trust, working with certified building professionals.
We carry out studies, design, urban planning management and coordinate all trades to ensure smooth execution and avoid unforeseen events.
Your project progresses with clear management, regular updates, and complete transparency. The work is carried out by our certified tradespeople.
FAQ – House extension
Quelle est la durée d’une surélévation How long does a roof extension take?
On average, between 3 and 6 months, depending on the structural complexity and the process used.
Can all houses be raised ?
No. Feasibility depends on the load-bearing capacity of the walls and foundations, as well as the urban planning context. Hence the importance of a preliminary study.
Should we leave the house during the renovations ?
It depends on the construction site. Wood or steel construction methods, which are faster, often allow the dwelling to remain in place during part of the work.
Which method of raising the roof is the most economical ?
Timber framing is generally the most competitive due to its lightness and speed of installation.
Can I add an interior staircase to my project?
Yes. The staircase can be integrated into the architectural design and sized according to the available space.
How to maximize natural light ?
We optimize the orientation, integrate roof windows, skylights or panoramic frames according to the constraints of the volume.
BRICK Renovation no drill just chill
Architect x Project Manager x Artisan x Financing under the same roof for a stress-free remodeling project
