Astheimer has created contemporary designs for many interiors. These include kitchens for the renowned Italian firm Snaidero, interiors for hotels, restaurants, yachts, motorhomes and trailers, trains, residential homes and offices.

Whilst at Pininfarina, Carsten developed the entire interior design and furnishings for The Keating, a luxury boutique hotel set in San Diego’s vibrant Gaslamp District. The refurbishment started with a stripping back of the various layers of cladding which had been added over the years to the original building bricks and stone, some of the original woodwork was also restored and brought back to life, these were contrasted by stainless steel furnishings and strong simple open plan features, give a modern industrial feel to the hotel, because of the reuse of materials the project was awarded the ASID Earth-Minded Award, and is described by Celebrity Travel Magazine as having ‘one of the five best honeymoon suites in the world’.