30, 30a, 30b and 31, Wimpole Street W1

30, 30A, 30B, and 31 Wimpole Street is a large corner block of townhouses built in 1912 by Banister Fletcher. The building is constructed from Portland stone and features slate roofs. It showcases a dynamic Free Style design that combines classical and Jacobean elements, highlighted by steep pediment-gables and canted bays. The structure has four storeys plus attics, and it sits on a basement.

The front facade includes two three-storey canted bays and a corner bay, while the symmetrical return on New Cavendish Street features three pairs of three-storey canted bays along with a central attic feature. Doorways are positioned beneath a first-floor balcony situated between the canted bays. The windows are flush ashlar mullioned and transomed leaded casement types, with small oblong windows on the third floor alternating with blind panels, which create a "frieze" effect beneath the main cornice and pediments. The pediments also contain circular windows.

On the New Cavendish Street side, there are four small windows between each pair of canted bays on every floor, set within segmental arched lined panels. The building features two segmental pedimented stone dormers between the front pediments and two wider dormers that project forward on the return, flanking a central balustraded and arcaded concave attic feature. A continuous stone strapwork balustraded balcony on consoles is present at the first floor, flush with the fronts of the canted bays, along with similar stone balconies on the first and second floors of the return, linking the pairs of canted bays. The building is finished with a moulded main cornice and moulded pediments, and it is surrounded by cast iron area railings.