The Embassy and the Passport and Visa Office are located in different places.
Directions to the Embassy
17 Grosvenor Place, London SW1X 7HR
The Embassy address is 17 Grosvenor Place in Westminster and is located at the corner of Grosvenor Place and Chapel Street (the entrance is actually on Chapel Street).
The nearest tube station is Hyde Park Corner on the Piccadilly line (4 minutes' walk). This line also serves Heathrow Airport. The next nearest tube station is Victoria on the District, Circle and Victoria Lines (6 minutes' walk). Victoria is also a mainline railway station that serves the south and south east of England, as well as Gatwick Airport.
Directions to the Passport and Visa Office
114a Cromwell Road (Ground Floor) London SW7 4ES.
The new office is directly opposite the Holiday Inn Hotel on Cromwell Road, approximately 200-300m from Gloucester Road Tube Station (Circle, District and Piccadilly lines). The office is also served by the No. 74 bus route.
Directions from Gloucester Road Tube Station (2 minute walk): Turn left on leaving the station and turn left again onto Cromwell Road at the junction with Gloucester Road. The Passport and Visa Office is located on the opposite side of the road, approximately 200m from this junction.