Developer Highcross has been ordered to partially demolish a new office, after a neighbour complained that it deprived his own property of light.
The Toronto Square scheme in Leeds involved the construction of an additional sixth and seventh floors to an existing block, adding over 7,000 sq ft of space.
The £10m extension was completed in 2009, and rented out to business consultants Zolfo Cooper on a 10-year lease.
But next-door neighbour Marcus Heaney filed for an injunction against Highcross, arguing that the extra floors deprived his own property of its right to light.
The case was initially thrown out on the basis that Heaney did not complain about the development during its construction phase.
However, courts subsequently granted him an injunction against Highcross, requiring the developer to pull down part of the extension, although it will not to have pay any financial compensation.