| Ditta | Cantone | NAP | luogo | Sito web | |
|---|---|---|---|---|---|
| Alpinofen Romandie Sàrl | Vaud | 1844 | Villeneuve | www.alpinofen.ch | |
| Alpinofen Zentralschweiz AG | Lucerna | 6014 | Luzern | www.alpinofen.ch | |
| Alpstäg Architektur AG | Berna | 3612 | Steffisburg | www.alpstaegarch.ch | |
| Alpsteg Fenster AG | Argovia | 5600 | Lenzburg | www.alpsteg.ch | |
| Alteno AG | Basilea Città | 4056 | Basel | www.alteno.ch | |
| ALU Architekten, Atelier Larcher + Uhlmann | Zurigo | 8800 | Thalwil | www.alu-arch.ch | |
| ALZA Architecture-Conseils Sàrl | Neuchâtel | 2300 | La Chaux-de-Fonds | www.alza-architecture.ch | |
| AMC GmbH | Vallese | 3900 | Brig | ||
| Amstein + Walthert AG | Zurigo | 8050 | Zürich | www.amstein-walthert.ch |
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| Amstein + Walthert AG | Turgovia | 8500 | Frauenfeld | www.amstein-walthert.ch |
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| Amstein + Walthert Genève SA | Ginevra | 1203 | Genève |
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| Amstein + Walthert St. Gallen AG | San Gallo | 9000 | St.Gallen |
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| Amstutz Holzbau AG | Nidvaldo | 6370 | Stans | www.holzbau-amstutz.ch | |
| anae - atelier nature architecture environnement | Vaud | 1027 | Lonay | anae.archi/index.html> | |
| Anderegg Partner AG | Soletta | 4512 | Bellach | www.andereggpartner.ch |
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| André SA | Vaud | 1169 | Yens | www.andre-sa.ch | |
| Andy Wickart Haustechnik AG | Zugo | 6313 | Finstersee | www.awiag.ch | |
| Anima Engineering AG | Basilea Città | 4051 | Basel | www.anima.engineering | |
| Anliker AG Generalunternehmung | Lucerna | 6021 | Emmenbrücke | ||
| anneler hungerbühler ag | Berna | 3600 | Thun | www.ah-thun.ch |
