HertelTan can help you renovate the energy efficiency of your buildings, whether residential, office or commercial. We combine energy performance, sustainability and design to offer solutions tailored to your needs and today's environmental challenges.

Swiss architect
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A renovation designed to last

Each project begins with a detailed analysis of the existing building and the specific challenges of the site.
We offer tailor-made solutions, adapted to your priorities in terms of use, budget and sustainability.

Our services cover the entire renovation process:

  • Energy audit and diagnosis: identify areas for improvement to reduce your energy consumption.

  • Thermal and acoustic insulation: optimizing building performance by limiting heat loss.

  • Optimization of heating and ventilation systems: implementation of energy-saving and environmentally-friendly solutions.

  • Use of environmentally-friendly materials: sustainable, high-performance materials for responsible renovation.

  • Project management and work supervision: full support from initial analysis to implementation of solutions.

The benefits of successful energy renovation

  • Lower energy costs: significant reductions in heating and electricity bills.

  • Improved thermal comfort: better insulated spaces for pleasant temperatures all year round.

  • Property value: an energy-efficient building increases in value on the market.

  • Ecological commitment: contributing to the energy transition by reducing your carbon footprint.

  • Regulatory compliance: meeting new environmental and energy standards.

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Our approach

We implement effective solutions without compromising architectural quality or the identity of the site.
Each project is guided by a desire for durability, elegance and technical coherence.

Let's reduce your energy footprint together

Renovation means extending the life of a building - and making it fit for tomorrow's challenges.

Make your architectural project a reality with HertelTan

The HertelTan team supports you in all your real estate projects, from conception to completion. We offer a tailor-made service, combining technical expertise, architectural creativity and attention to detail.

Our team of experts can assist you with all your real estate projects in Geneva, from conception to completion, with a tailor-made service combining technical expertise and creativity.

Flagship projects

Our approach transcends typologies - each project embodies a balance between functional requirements and spatial poetics.