If the existing windows are not the really old sliding box sash windows , £2250 +/- £200 should be about right. About £50 per window / door extra if they are sashes and need re-lining in timber of plaster
If the existing windows are not the really old sliding box sash windows , £2250 +/- £200 should be about right. About £50 per window / door extra if they are sashes and need re-lining in timber of plaster