Projects · selection

Projects from underground.

A selection from recent years. Every project with its own brief, its own geology — and the same Broder precision.

Large-scale projects

Heat at scale.

Districts, hospitals, neighbourhoods. Borehole fields with dozens of probes — planned, drilled, and connected from Sargans.

2015 – 2021 · Zürich

Greencity · 2000-Watt site

The first 2000-Watt-certified site in Switzerland. LEED Platinum, 13 buildings, 8 ha. 59 % of the heat comes from our probes.

Probes: 140 × 220 m
Total drilled metres: 30'800 m
Probe type: Duplex SDR11/PN16
Client: EWZ Zürich

2015 – 2020 · Rotkreuz

Areal Ost · Suurstoffi

Our largest single project. A mixed-use neighbourhood that — thanks to geothermal and PV — drops to 0.0 l/m² in the oil-equivalent statistics.

Probes: 184 × 280 m
Total drilled metres: 51'520 m
Probe type: Duplex SDR9/PN20
Client: Zug Estates AG

2015 – 2016 · Baden

Baden Cantonal Hospital · partner building

Compact probe field for a new hospital building. Tight time windows, sensitive surroundings — standard for medical infrastructure.

Probes: 42 × 150 m
Total drilled metres: 6'300 m
Probe type: Duplex SDR11/PN16
Client: Kantonsspital Baden AG

2016 · Dübendorf

Jabee Tower residential building

A high-rise that heats itself from the ground. 50 probes on a small footprint — urban drilling at its best.

Probes: 50 × 260 m
Total drilled metres: 13'000 m
Probe type: Duplex SDR9/PN20
Client: Kummer / Beerstecher

2016 – 2019 · Wattwil

Wattwil Cantonal Hospital · extension

VARIO probes for a hospital in the Toggenburg valley. Two pressure stages in one borehole — precisely matched to the heat demand.

Probes: 62 × 200 m
Total drilled metres: 12'400 m
Probe type: Duplex VARIO SDR11/PN16 · SDR9/PN20
Client: Kanton St. Gallen

2018 · Dübendorf

3 Point · Dübendorf

Neighbourhood project across six buildings — a single coordinated probe field for heating and free cooling. 156 double-U probes, coordinated across multiple construction phases.

Probes: 156 × 280–288 m
Total drilled metres: 43'800 m
Probe type: Doppel U · Ø 40 mm
Address: Sonnentalstrasse 9/13/17 · 8600 Dübendorf

Hochbord A & B office building Dübendorf

2018 · Dübendorf

Hochbord office building A & B

Probes: 63 × 250 m
Total drilled metres: 15'750 m
Address: Sonnentalstrasse · 8600 Dübendorf

2018 · Root LU

D4 Business Village

Probes: 60 × 160 m
Total drilled metres: 9'600 m
Address: Platz 4 · 6039 Root LU

2018 · Schmerikon

Schlattpark Schmerikon

Probes: 21 × 200 m
Total drilled metres: 4'200 m
Address: Schlattgasse · 8716 Schmerikon

2019 · Rapperswil

Hotel Rotbuche · Moxy

Probes: 25 × 250 m
Total drilled metres: 6'250 m
Address: Neue Jonastrasse 66 · 8640 Rapperswil

2019 · Zürich

Schulhaus Schauenberg

Probes: 28 × 188 m
Total drilled metres: 5'264 m
Address: Lerchenhalde 40 · 8046 Zürich

2019 · Zihlschlacht

Rehaklinik Zihlschlacht

Probes: 16 × 200 m
Total drilled metres: 3'200 m
Address: Hauptstrasse 2 · 8588 Zihlschlacht

Multi-family homes

Heat from underground.

From a single multi-family home to a whole development — Broder geothermal for residential buildings across German-speaking Switzerland. A selection:

Thurgau

MFH Sandbüel 8

8500 Gachnang

Probes: 5 × 180 m
Total: 900 m

St. Gallen

ÜBB Bettenwiese

9030 Abtwil

Probes: 8 × 200 m
Total: 1'600 m

Graubünden

ÜBB Kindschi

7270 Davos

Probes: 15 × 55 m
Total: 825 m

St. Gallen

MFH Seidenhofareal

8730 Uznach

Probes: 14 × 205 m
Total: 2'870 m

Zürich

Schellerareal

8620 Wetzikon

Probes: 6 × 245 m
Total: 1'470 m

Zürich

Wohnsiedlung Tüfwis

8185 Winkel

Probes: 7 × 260 · 5 × 230 · 9 × 270 m
Total: 5'400 m

Zürich

8 MFH's Im Handschüssel

8472 Seuzach

Probes: 28 × 180 m
Total: 5'040 m

Zug

Gottschalkenberg

6315 Alosen

Probes: 11 × 250 m
Total: 2'750 m

Zürich

Ersatzneubau Stüssistrasse

8057 Zürich

Probes: 19 × 200 m
Total: 3'800 m

Thurgau

MFH Maismühle

8500 Frauenfeld

Probes: 8 × 195 m
Total: 1'560 m

Aargau

ÜBB Zentrum Merenschwand

5634 Merenschwand

Probes: 8 × 260 · 7 × 230 m
Total: 3'690 m

Single-family homes

Over 200 completed single-family homes.

From compact to demanding - a selection of recent projects. We're happy to show you references in your region or run the numbers on your project: get in touch. Detailed references with addresses are available on request.

Thurgau · 2026

Single-family retrofit · Frauenfeld

8500 Frauenfeld

Probes: 2 × 220 m
Total: 440 m

Graubünden · 2025

Single-family retrofit · Parpan

7076 Parpan

Probes: 3 × 155 m
Total: 465 m

Zürich · 2025

New single-family home · Rüschlikon

8806 Rüschlikon

Probes: 3 × 230 m
Total: 690 m

Graubünden · 2025

Two new single-family homes · Klosters

7250 Klosters

Probes: 4 × 100 m
Total: 400 m

St. Gallen · 2026

New single-family home · Dietschwil

9533 Dietschwil

Probes: 2 × 160 m
Total: 320 m

Thurgau · 2026

Single-family retrofit · Hefenhofen

8580 Hefenhofen

Probes: 1 × 245 m
Total: 245 m

Zürich · 2025

Single-family home · Winterthur

Winterthur

Probes: 2 × 165 m
Total: 330 m

Zürich · 2025

Single-family home · Winterthur

Winterthur

Probes: 1 × 260 m
Total: 260 m

Zürich · 2026

Single-family home · Winterthur

Winterthur

Probes: 2 × 220 m
Total: 440 m

Zürich · 2025

Single-family home · Zurich

Zürich

Probes: 1 × 250 m
Total: 250 m

Zürich · 2026

Single-family home · Zurich

Zürich

Probes: 1 × 265 m
Total: 265 m

Zürich · 2026

Single-family home · Zurich

Zürich

Probes: 1 × 230 m
Total: 230 m

Liechtenstein · 2025

Single-family home · Balzers

9496 Balzers

Probes: 2 × 100 m
Total: 200 m

Liechtenstein · 2025

Single-family home · Schaan

9494 Schaan

Probes: 4 × 110 m
Total: 440 m

Liechtenstein · 2026

Single-family home · Eschen

9492 Eschen

Probes: 3 × 140 m
Total: 420 m

Deep drilling

Where others stop — we begin.

Coaxial borehole heat exchangers (K-BHE) with Ø 132 mm PN 50 and deep double-U probes up to 500 m. Special technology for maximum heat output on the smallest footprint.

K-BHE · Ø 132 · PN 50

450m

Max. probe depth

Dr. Levis · Zumikon

Wengi 6 · 8126 Zumikon ZH

Probe: 1 × 450 m coaxial
Type: K-BHE · Ø 132 mm
Pressure class: PN 50
Total: 450 m
Designer: Keoto AG, Zürich

10 × double-U · Ø 40 · PN 32

320m

Max. probe depth

Alter Tobelhof · City of Zurich

Tobelhofstrasse 230 · 8044 Zürich

Probes: 10 × 320 m
Type: Double-U · Ø 40 mm
Pressure class: PN 32
Total: 3'200 m
Designer: Willi Werner AG

Double-U · Ø 40 · PN 20

450m

Max. probe depth

Pfiffner AG · Zürich

Buchzelgstrasse 58 · 8032 Zürich

Double-U: 2 × 450 m · Ø 40 · PN 20
Total: 900 m

Discuss your project