who designed it?
William Burges
The Tower House
The Tower House, 29 Melbury Road, is a late-Victorian townhouse in the Holland Park district of Kensington and Chelsea, London, built by the architect and designer William Burges as his home. 
what is the tower house? A late-Victorian townhouse in Holland Park district, London
wiki:4438653
The Tower House [SEP] Introduction
The Tower House, 29 Melbury Road, is a late-Victorian townhouse in the Holland Park district of Kensington and Chelsea, London, built by the architect and designer William Burges as his home. Designed between 1875 and 1881, in the French Gothic Revival style, it was described by the architectural historian J. Mordaunt Crook as "the most complete example of a medieval secular interior produced by the Gothic Revival, and the last". The house is built of red brick, with Bath stone dressings and green roof slates from Cumbria, and has a distinctive cylindrical tower and conical roof. The ground floor contains a drawing room, a dining room and a library, while the first floor has two bedrooms and an armoury.