Cap the gas, then cut the stone, then give the hob its own circuit

Swapping a gas hob for induction in Singapore is three trades in one opening. A City Energy licensed gas service worker caps the gas, or the LPG cylinder leaves. A 13A hybrid hob can use a socket. A full induction hob needs a 20A or 32A circuit in 4mm or 6mm cable. The quartz cut is S$250 to S$550 with wet HEPA extraction. The hob and the circuit are extra. The opening is not a DIY grinder cut.

City Energy supplies piped gas in the flats that have it. The pipe is capped by a licensed gas service worker, and the certificate is what makes the induction swap legal rather than a hose pushed behind the cabinet. An LPG cylinder is a different fuel. The cylinder is disconnected and removed. It is not stored in the same cabinet as the new hob. Either way the gas is finished before the stone is cut, so a spark from a grinder is not a story. The old gas tap is not a cable entry.

A hybrid induction hob that is sold as plug-and-play may sit on a 13A socket if the manufacturer says so and the socket is a real radial, not an adaptor on the rice-cooker point. A full-width induction hob is commonly 20A or 32A. The cable is 4mm squared for many 20A circuits and 6mm squared for 32A, on a dedicated breaker, with the RCCB type discussed in the power-trip guide because inverter hobs produce residual current a Type AC device may not see. Sharing the oven circuit is how both appliances trip at dinner. The electrician sizes the cable. A longer extension lead is not a size.

Quartz and sintered stone are cut wet with a diamond blade and HEPA extraction because the dust is fine and, for many quartz products, it contains respirable crystalline silica. A dry cut coats every room and can crack the slab at a sharp internal corner. A stainless adapter trim is the alternative when the new hob is smaller than the old cutout, or when the old cutout is only slightly out and a trim frame closes the gap without enlarging the hole. Enlarging is right when the new pan support is wider. A trim is right when you are going smaller. The cutout checker asks for both sets of dimensions before anyone books the blade.

Homey Furnishing Pte. Ltd. (ACRA UEN 202018148K), 27 Mandai Estate, #06-10 Innovation Place, Singapore 729931, carries the permit-exempt portion of this work. V On Construction Pte. Ltd. (ACRA UEN 201611708H), listed on the HDB Directory of Renovation Contractors, carries any scope that needs an HDB renovation permit. Those two invoices are not interchangeable. Piped gas is capped by a City Energy licensed gas service worker. A new dedicated circuit is an EMA licensed electrician. The wet cut and the cabinet support are permit-exempt if the kitchen layout does not change. A new kitchen layout is V On Construction Pte. Ltd. UEN 201611708H.

Spend ten minutes with a torch, your phone camera, and a tape before you buy a product or book a hack. Write down what you see. The safe checks below do not ask you to open a live wire, cut a pressurised pipe, or lean out of a window. Measure the existing cutout, the new hob cutout, the distance to the sink and to the front edge, and the route from the DB to the hob. Photograph the gas point and the existing socket.

Stop at the red-flag column. Stop if gas is still connected, if the cut would leave less stone than the slab needs, or if the only power plan is an extension lead. The reason DIY fails is almost never a lack of effort. It is that the tool or chemical makes the next professional repair harder, or it hides a leak, a live conductor, or a deposit line until the damage is larger than S$250 to S$550 for the cut. The circuit and the gas cap are separate lines..

This is the sequence a careful technician uses so you can tell a shortcut from a finished job. Tools stay in the van. Readings and photos go on the same worksheet as the price. Wet diamond cutter, HEPA extraction, stone tape and support, stainless trim if the hole is not being enlarged, and the electrician’s cable and breaker for the circuit the manual names. The gas worker caps before the blade starts.

1. Step 1. Make the area safe and confirm the symptom still matches the photos. For Cap the gas, then cut the stone, then give the hob its own circuit, that means Stop if gas is still connected, if the cut would leave less stone than the slab needs, or if the only power plan is an extension lead.
2. Step 2. Measure before touching the finished surface. Measure the existing cutout, the new hob cutout, the distance to the sink and to the front edge, and the route from the DB to the hob. Photograph the gas point and the existing socket.
3. Step 3. Set protection and lay out the tools that belong to this material. Wet diamond cutter, HEPA extraction, stone tape and support, stainless trim if the hole is not being enlarged, and the electrician’s cable and breaker for the circuit the manual names. The gas worker caps before the blade starts.
4. Step 4. Carry out the repair in the order the material allows. a dry cut cracks the slab or dusts the flat, the gas is left uncapped, or a 32A hob is plugged into a 13A socket is the failure this order is written to avoid.
5. Step 5. Test in place. The gas certificate or the LPG removal is in the pack. The hob heats on its own breaker. The cut edge is clean, the trim is tight if there is one, and the cabinet below is not full of slurry.
6. Step 6. Clean, label the photographs against the invoice lines, and leave the statutory openings, weep holes, access panels and labels visible.

The order matters because a dry cut cracks the slab or dusts the flat, the gas is left uncapped, or a 32A hob is plugged into a 13A socket is what happens when a step is rushed. Handover is a measurement, not a handshake. The gas certificate or the LPG removal is in the pack. The hob heats on its own breaker. The cut edge is clean, the trim is tight if there is one, and the cabinet below is not full of slurry. If the reading or the water test fails, the visit is not closed and a second line is priced before anyone leaves. Permit work, if the diagnosis has moved into hacking, waterproofing, or a new layout, stops here and is repriced through V On Construction Pte. Ltd. UEN 201611708H.

Price the cut, the gas and the circuit as three lines. A package that hides one of them is how the hob sits in the doorway for a week. Prices below are 2026 Singapore bands for the described scope. They are not a coupon and they are not a guess after an unopened door. A second trade, such as a PUB licensed plumber or an EMA licensed electrician, is named when the law requires it rather than buried inside the labour line. Compare rows by what they include. The planning-life column belongs to that row only.

2026 SGD scope bands

Brand, material and lifespan

Run the hob cutout checker, then book the cooker hood and hob service. The hood duct is a separate measurement if the new hob is deeper.

Three worked jobs show how the same symptom is priced differently in a new BTO, an older resale flat, and a private condo or landed house. The totals are the lines a household actually paid, not a national average. Permit-exempt invoices are issued by Homey Furnishing Pte. Ltd. UEN 202018148K.

Case 1: 4-room BTO in Tengah

Piped gas was capped by a licensed gas worker for S$220. The induction hob was a true 13A hybrid and the socket was a radial. A stainless trim closed a slightly larger old cutout for S$260. No new circuit. Half a day.

Case 2: 28-year resale flat in Bedok

The new hob needed 32A. The wet cut was S$420. The 6mm circuit from a tired board was S$780. The gas cap was S$250. Total S$1,450 before the hob the owner had bought. The dry-cut option was refused because the flat was occupied.

Case 3: landed house in Serangoon

LPG cylinders were removed. A 3-phase supply made the 32A circuit simple. The sintered top was cut wet with rounded internal corners for S$550. A sharp-corner template from the hob carton was redrawn before the blade started, which is why the slab survived.

Use the cutout checker and book the hob service with photos of the gas point and the DB. Send the photos and the measurements from the ten-minute check. The reply prices the band on this page against what the photos actually show.

• Book the hob swap
• Hob cutout checker
• RCCB type for an induction hob