Kitchen Renovation: Coordinating Carpentry, Plumbing, Electrical

A kitchen renovation succeeds or fails on sequencing. Plumbing and electrical rough-in must be planned and roughed out first, then carpentry is measured and installed to fit those fixed points, and only after that do the appliances, tap and sink go in. Get the order wrong and you end up hacking finished tiles or cabinets to move a pipe or socket.

In a Singapore HDB flat or condo, the kitchen is where the most trades overlap in the smallest space. A typical kitchen renovation runs somewhere in the range of 6,000 to 25,000 dollars or more, depending on cabinet run length, worktop material, and how much you move the wet points and wiring. The single biggest cost and delay risk is poor coordination between the carpenter, the plumber and the electrician, so it pays to understand how the pieces fit together before work starts.

What is the correct order of work in a kitchen renovation?

Trades run in a deliberate sequence, not all at once. Each stage locks in decisions the next stage depends on, so skipping ahead almost always creates rework.

As a rough guide, most Singapore kitchen jobs follow this order:

• Hacking and removal of old cabinets, tiles and fittings
• Plumbing rough-in: shift or extend water supply and drainage points
• Electrical rough-in: run new wiring, position sockets and lighting points
• Wall and floor tiling, then plastering and painting
• Carpentry install: base and wall cabinets, then the worktop
• Final connections: sink, tap, hob, hood, oven and appliances
• Testing, silicone sealing and cleaning

Why does plumbing come before carpentry?

Your sink, dishwasher and washer all need water in and water out at fixed positions. Those points are set during the plumbing rough-in and are usually buried in the wall or floor, so they cannot be nudged once tiling is done.

The carpenter then builds the cabinet layout around those points. If cabinets go in first and a pipe lands in the wrong place, someone has to cut the carpentry or re-lay drainage, which wastes both money and days. Decide your sink and appliance positions early and share them with the plumber before any rough-in happens.

How should electrical work be coordinated?

Electrical rough-in also happens before tiling and carpentry, because sockets, isolators and lighting points get chased into the walls. Kitchens draw heavy loads, so plan dedicated points for the oven, hob, hood, water heater, fridge and any built-in appliance rather than relying on multi-plugs.

In Singapore, electrical work that touches your consumer unit or adds new circuits should be done by a Licensed Electrical Worker (LEW), and larger load changes may need approval from SP Group. Agree socket heights and counts with your electrician while the walls are still open, since adding a point after tiling means fresh hacking.

• Dedicated 20A or higher point for the oven and hob as specified
• Socket for the hood, with the switch reachable but clear of heat
• Water heater point placed for the storage or instant unit you chose
• Under-cabinet or over-cabinet lighting points decided before carpentry

What are the common clashes between trades?

Most kitchen headaches come from one trade not knowing what another has planned. The fixes are cheap on paper and expensive once things are built.

Watch for these frequent clashes:

• A socket ending up behind a tall unit or fridge where you cannot reach the switch
• Drainage falling short of the new sink position after cabinets are set
• The hob cut-out clashing with a drawer or the sink pipe below
• Tile joints and cabinet edges not lining up because layout was not finalised
• No isolator or gas point where the appliance actually sits

Who coordinates all of this on site?

This is where a single main contractor earns its keep. Rather than you scheduling a separate carpenter, plumber and electrician and hoping their dates and measurements line up, one team sequences the trades, holds the master measurements, and takes responsibility when something does not fit.

If you would rather not project-manage three trades yourself, our kitchen renovation service coordinates the carpentry, plumbing and electrical under one roof, with the licensed electrical work done properly and the wet points planned before anything is tiled or built. That single point of accountability is usually what keeps a kitchen job on budget and on schedule.

How long does a kitchen renovation take in Singapore?

A straightforward kitchen refresh with new cabinets, worktop and minor point changes often takes around 2 to 4 weeks. A fuller job that moves plumbing and electrical points, retiles floor to ceiling, and includes custom carpentry can run 4 to 8 weeks or longer.

Timelines stretch when decisions are made late. Choosing your appliances, sink, tap and worktop material before rough-in begins lets the plumber and electrician set the right points the first time, which is the surest way to avoid a delay.

Frequently asked questions

Do I need HDB approval for a kitchen renovation? Cosmetic work like new cabinets and tiling generally does not need a permit, but hacking walls, changing floor finishes in certain ways, or altering the layout may require an HDB renovation permit, and your contractor should apply on your behalf. Structural walls must never be hacked.

Can I keep my existing pipes and wiring to save money? Sometimes, if they are in good condition and already sit where your new layout needs them. If you are moving the sink or adding appliances, extending old points often costs more than doing it cleanly during rough-in, so weigh it before deciding.

Should electrical work be done by a licensed person? Yes. Work involving your consumer unit or new circuits should be carried out by a Licensed Electrical Worker in Singapore, both for safety and so the installation is compliant. Ask to confirm the LEW before work begins.

Can I choose appliances after renovation starts? It is much safer to choose them first. Ovens, hobs, hoods and fridges have specific size, socket and cut-out needs, so finalising them upfront lets the electrician and carpenter build to the exact dimensions instead of guessing.