Springfield officials are offering property owners a chance to buy blighted vacant lots next to their own properties. The lots were taken over the by the city after their previous owners stopped paying taxes. Under the city’s ‘‘Abutter Lots Sales Program,’’ owners of adjacent residences or businesses can buy the vacant lots if they are valued at $25,000 or less and are not needed by the city for public use. The lots would be sold at a price of 25 cents per square foot and can be used by their new owners for purposes including additions to existing properties, gardens, landscaped yards, or off-street parking. Mayor Domenic Sarno said the program seeks to reduce blight and return unused parcels to the the city’s tax rolls.