
Structural engineering and building physics for new construction, refurbishment and heritage preservation from Darmstadt
Schlier Ingenieure AG
DarmstadtNew on Amplifa
About Schlier Ingenieure
Schlier Ingenieure AG is an engineering firm for structural engineering and building physics based in Darmstadt. As consulting engineers, the company has been active in all areas of structural engineering for 50 years, including more than 25 years under the name S+P GmbH Schlier und Partner, before the company was renamed Schlier Ingenieure AG. Its services include structural engineering for new construction and refurbishment, calculations and consultancy on thermal, acoustic and fire protection, as well as planning and consultancy for construction projects. A key focus is structural engineering in heritage preservation, where the firm draws on decades of experience and also acts as an expert assessor. By getting involved early in architectural design decisions, the firm aims to combine form and function, bringing traditional techniques and materials into harmony with modern, safety-oriented standards. Project references include the Mathildenhöhe World Heritage Site in Darmstadt (Wedding Tower and exhibition halls), Veste Otzberg castle, Wilhelmshöhe Palace in Kassel, the Undenheim primary school and the Sonnenblumenschule in Langen. Clients include public-sector clients such as the Darmstadt Regional Council, investors and architects.
- Site
- Darmstadt
- Processes
- Structural engineering (new construction and refurbishment), Calculations and consultancy for thermal, acoustic and fire protection (building physics), Structural engineering in heritage preservation and monument conservation, expert assessment work, Structural engineering, Building physics (thermal, acoustic and fire protection), Calculations and consultancy for new and existing buildings, Structural engineering in heritage preservation, Expert assessment work in heritage preservation
- Materials
- Structural Engineering (New Construction and Refurbishment), Building Physics (Thermal, Acoustic and Fire Protection), Structural Engineering for Heritage Preservation
- Certificates
- Expert assessment work in heritage preservation, Nomination for the German Sustainability Award Architecture 2025
- Industries
- Building construction, Heritage preservation, Public-sector clients, Investors, Architects, Public-sector clients / investors / architects
- 01
Consulting and structural engineering
- 02
Building physics calculations
- 03
Structural engineering for heritage preservation
- 04
Expert assessment work
- 05
Project support as planner and consultant
Services and Areas of Expertise
Structural Engineering (New Construction and Refurbishment)
Structural analysis and structural engineering for new and existing buildings with early involvement in design decisions.
Building Physics (Thermal, Acoustic and Fire Protection)
Calculations and consultancy on thermal, acoustic and fire protection for new and existing buildings.
Structural Engineering for Heritage Preservation
Refurbishment of historic building fabric incorporating traditional techniques and materials, also as an expert assessor.
Location

Darmstadt
DEHead office / engineering firm
- Lot size
- Project business
- Materials
- Structural engineering, building physics, heritage preservation, expert assessment
Projects






Inside the production
















Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Structural engineering (new construction and refurbishment)Engineering | – | – | – | – | – |
| Calculations and consultancy for thermal, acoustic and fire protection (building physics)Engineering | – | – | – | – | – |
| Structural engineering in heritage preservation and monument conservation, expert assessment workEngineering | – | – | – | – | – |
Additional services
Reference customers
Quality and Expert Assessment
The work follows current legal requirements and the latest scientific findings. In the field of heritage preservation, the firm also acts as an expert assessor on the basis of its many years of experience.
| Evidence | Darmstadt |
|---|---|
| Expert assessment work in heritage preservation | |
| Nomination for the German Sustainability Award Architecture 2025 |
History
More than 25 years active as the engineering firm “S+P GmbH Schlier und Partner”; renamed Schlier Ingenieure AG
50 years active as consulting engineers for structural engineering and building physics
- 2008
Start of refurbishment of the Mathildenhöhe World Heritage Site in Darmstadt (Wedding Tower and exhibition halls, 2008–2023)
- 2010
Refurbishment of Veste Otzberg (2010–2017)
- 2013
Project sheet on flood protection wall at the town wall of Wörth am Main published
- 2017
New construction of Undenheim Primary School (2017–2022)
- 2022
New construction of extension to Sonnenblumenschule Langen
- 2024
Refurbishment of Wilhelmshöhe Palace, Kassel