Can a 60 cm cooktop opening be enlarged for a 90 cm cooktop?

Start with cutout dimensions, not the name on the box

A 60 cm or 90 cm label describes an appliance size class, not the exact hole required. Two nominally similar cooktops can have different opening dimensions, corner details and body depths. Get the installation drawing for the exact replacement model and measure the existing opening once accessible. Keep the drawings with the enquiry so the proposed cut can be assessed against the actual fitting.

Check where the extra width would go

An enlargement is not automatically centred on the old hole. Tall cupboards, an adjacent sink, joins and the end of the benchtop may limit the position. Send a wide photo showing the complete run and close views of the front and rear stone rails. The stone left behind must be assessed along with its support and condition. Existing cracks and repairs should be disclosed before a price is accepted.

Look inside the cabinet

The appliance body and its installation requirements need room below the surface. Ask your installer to check drawers, oven clearance, cabinet dividers and the model’s ventilation requirements. The stone can have enough width while the cabinet still prevents the installation. Cabinet modifications are separate from stone cutting unless specifically included in the written scope.

Coordinate removal and connection

For a gas-to-induction change, arrange the gas and electrical work with the appropriate licensed trades. Confirm who removes the old cooktop and when the opening will be accessible. If the concealed condition differs from the photos, the alteration must be reviewed before cutting. Keep the new appliance instructions available for the installer rather than relying on a generic measurement.

Budget for the agreed stone work

Standard cooktop cutting starts from $690 + GST per cut ($759 including GST). Your quote confirms the actual opening, material, access and finishing. Appliance purchase, disconnection, electrical work and cabinet changes are different items. Send your suburb, photos, existing dimensions if available and the replacement model to request the stone quote.

Questions, answered.