The 1,000m2 scheme, at 314 Regents Park Road, sits between three existing office blocks on a site currently used for car parking.
According to the practice, the scheme's 'chamfered form' will allow sunshine and daylight into neighbouring buildings and, at the same time, protect views - a condition for winning planning consent.
A spokesman for DLA said: 'On one side this formal language is subverted. The regular grid is displaced, the windows deep-recessed, and a more dynamic facade is presented to those arriving by car.
'By providing a new raised car-parking deck, and positioning the new office on columns above, the design makes maximum use of the site - improving the level of car parking while providing maximum-office floor space,' he added.
The scheme is expected to begin on site this summer.