Old and new perfectly combined

Extensions, conversions and additional storeys can seldom be planned completely in advance. That’s why specialist knowledge and extensive experience are essential. Our experts think flexibly. This allows them to fulfil your requirements, while at the same time achieving a perfect interplay of old and new, both in terms of aesthetics and energy efficiency. Our experienced experts will plan and deliver your project while taking into account:

  • Form and style
  • Heritage protection requirements
  • Fire regulations
  • Statics
  • Energy efficiency requirements
  • Sound insulation

Our complete renovation package

  • Complete recording of the building
  • Feasibility studies
  • Handling funding proposals
  • Coordinating energy certifications
  • Component calculations
  • Proposals for renovation
  • Implementation planning
  • Building applications for renovations
  • Construction support as GC or joint GC 
  • Production and assembly of timber constructions

Are you planning an extension or upward extension?

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Advice from an expert in upward extensions?

Markus Rutz looks forward to hearing from you.

T +41 71 388 58 40

Timber construction services

General contractor services

Project development

Timber construction planning and engineering


  • Discussion in the planning team of the timber construction general contractor department of Blumer Lehmann
  • A team of personnel and clients discuss a drawing on a plan
  • Hand with pen and plan
  • The milling head processes the piece of wood on the CNC machine. The shavings fly off.

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