Property group Bruntwood has secured a string of new lettings at its Centre City building in Birmingham.
The National Association of Citizens Advice Bureaux has taken an entire floor totalling 7,500 sq ft and YTKO Group has agreed a lease on 1,811 sq ft of space for its new GetSet for Growth West Midlands team.
Incumbent Centre City customer Ofwat, the water service regulation authority, has renewed its lease on 15,000 sq ft in the building following a £792,000 refit of its space.
Rob Valentine, head of Bruntwood's Birmingham office, said: "Centre City is ideally situated just metres from New Street station and Grand Central and we have undoubtedly benefited from Birmingham's investment in the area.
"We take pride in our sustainable approach to development, looking to recycle existing space and maximising its potential to create attractive, flexible offices and it is always satisfying to see it pay dividends.
"When we bought the building in March 2012, it was only 30 per cent occupied.
"Now, following our comprehensive renovation of the building and the proximity to Birmingham's new flagship transport hub and retail development, occupancy is at 83 per cent."
Bruntwood owns and manages more than 140 properties in four UK cities.
Elsewhere in Birmingham, it owns the revamped Grade II listed Cornwall Buildings in Newhall Street and work has begun on its £14 million renovation of Two Cornwall Street.