Extended: Early Booking Savings 15% Off with Agoda at Washington Mayfair Hotel, London, UK. More about Washington Mayfair Hotel - Built in 1913 and renovated in 2008, this luxurious hotel combines classic style with all the modern comforts. From the outside, the property looks like an old English townhouse. But inside, the Washington Mayfair Hotel provides a contemporary oasis for both business and leisure travelers. All 171 air conditioned rooms in this charming property are well-serviced with a mini bar and flat screen television. Offering all the amenities in a fabulously located property, the Washington Mayfair Hotel is the ideal place to reside. Please enter your preferred dates of stay and submit our online booking form to make a reservation.