Sussex Police is looking to trace an 'agile thief' after tools were taken from a property in Marine Parade.
Police released CCTV images of a man they wish to speak to in connection with the incident.
A police spokesperson said: "At around 6.10pm on Thursday, July 26 a man approached the property on Marine Parade and looked around before climbing over the railings and dropping down into the basement area six foot below.
"The suspect has stolen over £1,000 worth of tools from the light well and then climbed back out and left.
"He is described as white, 50-60s wearing a purple T-shirt with green and blue picture on the front, black trousers and black shoes. "
Anyone who recognises the man is asked contact police online quoting serial 523 of 31/07.