Alfred's Kitchen in Guildford, one of Perth's oldest and best beloved burger joints, is preparing for a facelift and expansion.

Open and proudly unchanged since 1946 in the historic pioneer town, and famous for its pea and ham soup, enormous burgers, late-night hours and roadside fire pit, Alfred's has a new addition – a vintage railway car trucked in from its former home at a Myaree fast-food restaurant and installed on part of the vacant block next door.

With luck, the new dining space open before the restaurant's 70th birthday next year.

Owner Daniel Lawrence said Alfred's had primarily focused on takeaway but the addition of the dining car would take the restaurant into a new era.