| Palladium House | |
| Former Names: | Ideal House |
| Location: | Corner of Great Marlborough Street and Argyll Street |
| Location Town: | London |
| Location Country: | United Kingdom |
| Coordinates: | 51.514°N -0.14°W |
| Completion Date: | 1929 |
| Architectural: | Art Deco |
| Floor Count: | 7 |
| Architect: | Raymond Hood, Gordon Jeeves |
Palladium House, formerly known as Ideal House, is a grade II listed Art Deco office building located on the corner of Great Marlborough Street and Argyll Street in London.
The building was designed in by architects Raymond Hood and Gordon Jeeves in the art deco style as the London headquarters of the National Radiator Company (European subsidiary of the American Radiator Company). Its design was a scaled down version of the American Radiator Building, New York.
Built 1928–9, the building is a seven-storey office block, with black granite facing decorated with an inlaid champlevé design with Egyptian influences. The building was extended in 1935.
In 1981, it was declared a Grade II Listed Building.