Active job

Alter cabinets, install balustrade, maybe windows?

We have a few bits and pieces to do in our recently purchased home. We need a change to our laundry bench/cupboards to accommodate our large washing machine. We'd like a bannister at toddler height to our second storey, below the adult one. We also live on a busy road and are considering some new double glazed windows for the kids' rooms to help with noise and draughts, a bit of advice on this would be helpful.