Which London street was used for exterior shots of Holmes and Watson's residence?

North Gower Street in London was used for exterior shots of Holmes and Watson’s residence. The production filmed the outside of the building at 187 North Gower Street, while the famous flat at 221B Baker Street was represented by an interior set.

The real street was chosen because filming directly on Baker Street would have been impractical. Heavy traffic and the abundance of Sherlock Holmes-related signs and businesses would have made it difficult to create the clean, controlled image required for the series.

Viewers often assume that the exterior is actually on Baker Street because the fictional address is so central to Holmes’s identity. In the programme, North Gower Street provides the visual home of 221B, and Speedy’s sandwich shop below the building became recognisable to fans. Cardiff supplied much of the production, but this landmark exterior was filmed in London.