Strata SE1 is a 147-metre (482 ft), 43-storey, multi-award-winning, building at Elephant & Castle in the London Borough of Southwark with more than 1,000 residents living in its 408 flats.

In March 2014, an Ipsos MORI poll for New London Architecture of 500 members of the public aged 16–64 declared Strata SE1 Londoners' fifth favourite tall building, behind 30 St Mary Axe (The Gherkin), The Shard, The Leadenhall Building (The Cheesegrater) and One Canada Square (Canary Wharf).

The 39th floor features a "Sky Lobby" (a small corridor with a view over central London), while the living area is topped by a £2.5m three-bedroom duplex penthouse.

A prominent feature at the top of the building is three wind turbines, although they have rarely been used,[12] in part due to resident complaints over noise and vibration.

45), the council's Elephant and Castle Development Team indicated that “the incorporation of the wind turbines to create a dramatic and highly recognisable building form that achieves one of the Council’s plan objectives which is to create landmark buildings as signifiers of the Elephant and Castle on the London skyline.

The turbines are of course not merely decorative but have a function which is directly related to the Elephant’s status as an energy action area and to the achievement of the zero carbon growth which is a key objective of the framework.”[13] Construction began in 2007 and was completed in June 2010.

[14] Attending the topping-out ceremony were over 70 senior members of London's business community including Sir Simon Milton, Deputy Mayor for Policy and Planning, Cllr Nick Stanton, Leader of Southwark Council and MP for North Southwark and Bermondsey, Simon Hughes.

[12] In 2022, the chair of Southwark's planning committee said that the developers had failed to take into account how much the vibration of the turbines would pass through the building, and that the noise was louder on the higher floors.

[20] In 2010, the building exceeded by 13% the then-current UK regulations relating to sustainability, whilst overall carbon emissions were expected to be 15% lower than the Mayor of London's good practice benchmark.

The Architects' Journal in August 1962 found "little to criticise and much to praise and until New Zealand House is completed it is possibly one of the best examples for anyone wanting to look at a good office block in London.

"[24] During the demolition of Castle House to clear land for Strata, a construction worker, John Walker, 33, father of two was killed when a roof collapsed on him.