 The second purpose-built, and current, building was designed by JM Arthur, and opened on 25 September 1925, funded by Airdrie Savings Bank and a second Carnegie grant.The local newspaper, the Airdrie and Coatbridge Advertiser had this to say the next day; ""Although not quite finished the new Library building in Wellwynde Street was sufficiently far advanced towards completion to allow the opening ceremony to take place yesterday afternoon"".The observatory moved along with the library, a purpose-built observatory being built on the library roof and a brass refracting telescope was obtained by the observatory curator Ex-Baillie James Lewis for the sum of £500.