Six fire engines and around 40 firefighters were called to a fire at flats under construction on Curzon Street in Mayfair.
A small part of a basement in the block of flats was destroyed by fire.
Thankfully no injuries are reported.
The Brigade was called at 1534 and was under control by 1645. Fire crews from Soho, Paddington, Lambeth, Chelsea, and Euston fire stations were in attendance.
The cause of the fire is accidental and is believed to be due to building works.