A buyer is now wanted for the town centre four-storey Transport House building in Victoria Street.
Commercial property agency Bond Wolfe believe the building, near the High Street and New Square retail centre, will attract a lot of interest from developers.
If planning permission can be be secured from Sandwell Council, Transport House could be turned into homes.
The town centre office building, which includes 35 car parking spaces, is being sold with full vacant possession, clearing the way for possible redevelopment.
Transport House sits within the town centre's regeneration area, which has undergone extensive development over recent years – including New Square and the Western Gateway scheme at Carters Green
James Martin, managing partner at West Bromwich-based Bond Wolfe, said: "We are delighted to be selling another prime West Bromwich town centre asset.
“The town has witnessed huge inward investment over the last few years and early signs suggest that competition will be fierce for Transport House, both from developers and investors alike.
"The building sits just off the High Street and within an easy walk of the Metro line, bus station and all town centre amenities.”
It is the fourth West Bromwich office block to hit the market in the last couple of years, following Bond Wolfe's £2.1 million sale of Metro Court to a private investor last year and the sales of Society House and Parham House in 2017.