(above: inspiration for the final renovation project of a villa in Collonge, Geneva )

Extension, reconfiguration and complete renovation in controlled phases

In Collonge-Bellerive, on the left bank of Geneva, this project illustrates a common reality of a complete renovation :
an existing property with potential, but whose current configuration no longer meets modern uses and the life of the new family that recently took possession of this property.

The objective is not simply to renovate, but to completely rethink the volumes, circulations and networks , while allowing for a gradual implementation.

👉 A multi-phase transformation, structured from the outset to avoid costly mistakes.

Customer objective

• Create a closed master suite from a mezzanine open to the living room
• Reconfiguring living spaces for greater coherence
• Plan for a future bathroom extension
• Transforming a children’s mezzanine above an enlarged and completely renovated bathroom
• Rethinking soils and distribution
• Extending and renovating the kitchen
• Relocating an existing toilet to extend the kitchen

⚠️ Major constraint:
Everything must be phased intelligently , without compromising future steps.

Our approach: a structured renovation from the outset

In this type of project, success does not depend on the work itself, but on anticipation.

We structured the intervention around 3 principles, with a corresponding direction for the work :

1. Technical anticipation (ECI – anticipatory intervention)

• Network reservations and planning from the first phase with an architect’s design
• Coordination of future plumbing/electricity
• Forecast of final volumes
• Structural validation of the extensions with an engineering firm

2. Intelligent phasing

• Top-down intervention
• Limitation of future takeovers
• Technical continuity between phases

3. Alignment of design, budget, and feasibility

• Avoid redesigns during construction
• Ensure the overall coherence of the project

Phase 1 – Creation of the master suite (mezzanine)

Objective

Transforming an open mezzanine into a closed master bedroom , ready to accommodate a future bathroom.

Key interventions

• Structural extension of the living room mezzanine
• Volume closure
• Preparation of technical reservations
• Planning for utility networks (plumbing, drainage, electricity)

👉 This phase is crucial:
It conditions all the following steps.

Phase 2 – Children’s bathroom & mezzanine extension

Objective

Create a functional and sustainable space for children by renovating the bathroom .

Interventions

• Structural extension of the children’s mezzanine
• Bathroom extension and creation / complete renovation
• Coordination of the relocated and prepared networks in phase 1 for the future preparation of the new kitchen and the relocation of the WC

👉 Result: an optimized space, consistent with the rest of the project.

Phase 3 – Relocation of the WC

Objective

Optimize networks and usage.

Interventions

• Relocation of the toilet
• Adjusting the connections between the upstairs bathroom and the ground floor plumbing and the basement bathroom

Phase 4 – Reconfiguration of living spaces and kitchen

Objective

Redefining circulation and living spaces and recreating a kitchen adapted to contemporary uses…

Interventions

• Reorganization of rooms
• Kitchen area extension
• Reorganization of facilities
• Coordination of carpentry / networks / lighting
• Improved flow of spaces (redesigned entrance, modified access to the kitchen)

👉 A kitchen designed as a central family living space

The key point of the project

👉 The technical phasing of the networks

In this project, the plumbing and electrical work are not being done “as they go”.

They are :

• thought globally from the outset
• intelligently distributed by phase
• installed in advance to avoid any destructive recurrence

Expected result

• A house transformed without compromise
• A smooth execution despite the complexity and the crowded space
• A comprehensive vision respected from beginning to end
• Sustainable appreciation of the property

Why this project is interesting

This type of renovation perfectly illustrates a reality of the Geneva market:

👉 Complex projects cannot be improvised.

They require:

• a comprehensive vision from the outset
• rigorous project management
• advanced technical anticipation

Conclusion

In Collonge-Bellerive, this transformation demonstrates that a successful renovation does not depend solely on design or materials.

👉 It is based on a structured approach capable of aligning:

• the phases
• the networks
• the uses
• and the overall vision of the project

Geneva Renovation FAQs

Questions :

How complex is a phased renovation in Geneva?
A phased renovation requires precise technical planning, particularly to coordinate networks and avoid costly rework.

Why plan for networks from the very beginning of a project?
Planning ahead helps to avoid subsequent demolitions and ensures consistency between the different phases of the construction project.

Can a mezzanine be converted into a bedroom?
Yes, subject to structural feasibility and compliance with local standards, particularly in terms of height and safety.

What is the role of a general contractor in this type of project?
She coordinates all the trades involved, anticipates technical constraints and ensures the smooth running of the work.

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Are you planning a similar renovation in Geneva? Plan a discovery exchange

Before you begin, make sure that your project is technically viable and structured from the outset.

→ Discover the structured approach to residential renovation at COLLET HOMES

THE STRUCTURED APPROACH FOR HOME RENOVATIONS