Singapore’s heat and humidity are hard on electrical insulation, so wiring that would comfortably last decades elsewhere can start failing well before the 20-year mark here. House rewiring Singapore homeowners search for isn’t only something old flats need, though – plenty of people come to us for a different reason: fresh wiring for a new BTO before moving in, a landed house extension, or a condo renovation that’s adding a home office or an EV charging point. This guide walks through both situations – replacing wiring that’s on its way out, and wiring something new – across HDB, condo, and landed properties.
At a glance: most HDB rewiring jobs take 2-4 days and start from around $1,500. Condo and landed jobs vary more depending on size and whether you’re adding a new distribution board or a higher-capacity supply. Whatever the scope, the finished circuits should always be tested and signed off by a Licensed Electrical Worker, or LEW, (if your scope of work requires it) before everything is switched back on.
Most residential wiring here is run in one of two ways. The first is concealed inside wall conduits, which is the standard for HDB and condo units because cabling can be replaced later without hacking the wall. The second is visible surface trunking, which is quicker, reversible, and more common in rental units, shops, or conservation properties where the walls can’t be disturbed.
Lighting is usually wired as a loop-in circuit, where one feeder cable runs from the DB box to each light point, and the switch is wired as a separate loop. This makes it much easier to isolate a fault to a single light rather than to an entire room. Some older HDB flats built before the 1990s still use an older joint-box arrangement, where several branches meet at a single junction box; it works, but it’s harder to trace faults on, and it’s usually one of the first things replaced during a full rewire.
Many flats from the 1980s and 90s are still running on a modest single-phase supply and a small distribution board that was never designed for air conditioning in every room, plus an induction hob and a dryer. A full rewire usually means a new DB box with proper circuit protection and dedicated circuits for your bigger appliances. No HDB permit is needed for like-for-like rewiring within your own unit, though any changes to the DB box or main supply must be handled and notified correctly. Planning wiring for a new BTO, or want HDB-town-specific service? See our HDB Electrical Wiring & Rewiring guide.
The wiring itself is similar to HDB, but if the work touches a shared riser or needs hacking, you’ll usually need your MCST’s sign-off before work starts — it’s worth checking your house rules early so it doesn’t hold up your renovation timeline.
A bigger floor area usually means a bigger scope – more circuits, longer cable runs, and a real chance you’ll want a 3-phase supply if you’re running heavy aircon load, a pool pump, or planning an EV charger. Landed rewiring is priced individually because the scope varies so much from one house to the next.
If you’re wiring a space from scratch – a new BTO, a gutted resale flat, or an extension – this is where you plan the circuit layout around how you’ll actually live: where the TV console goes, where the kitchen island will sit, whether you want a dedicated circuit for a home gym or office. It costs less to plan it right the first time than to add points later.
| Property Type / Work | Typical Price |
| HDB 3-room / 4-room full rewiring | $1,900 – $35,00 |
| HDB 5-room / EA full rewiring | $2,900 – $5,000 |
| Condo full rewiring | $3,300 – $7,000 |
| Landed house rewiring | From $10,000 |
| New wiring for BTO / new unit fit-out | Quoted per layout |
| Partial rewiring (e.g., kitchen & bathroom circuits only) | Quoted per scope |
| 3-phase upgrade / EV charger point | Quoted per site assessment |
Final pricing depends on your unit size, the number of circuits and power points, wall/ceiling access (open conduit vs. concealed trunking), and whether a new DB box or higher-capacity supply is part of the job. We confirm the exact scope and a fixed, itemized price before any work begins – no hidden surcharges.
MM Engineering has completed hundreds of house rewiring Singapore and new-wiring projects across HDB, condo, and landed homes. Every job is handled by our own in-house electricians, not subcontracted, so you get consistent quality and full accountability from quote to certification.
House rewiring work in Singapore is governed by Singapore Standard SS 638:2018 (formerly CP5), and work of this nature is generally carried out or supervised by an EMA Licensed Electrical Worker (if required for the scope involved).
You can check a contractor’s license against the EMA’s public register before you commit. Working with an unlicensed handyman can void your home insurance and put your household at risk, so it’s worth asking to see the license and requesting a test certificate on completion rather than taking it on trust.
A full HDB flat rewiring typically takes 2-4 days. We coordinate with your renovation timeline if work is ongoing.
For occupied homes, we work room by room and restore power each evening where possible. Most clients rewire during renovation for minimal disruption.
It isn’t legally compulsory, but most resale flats over 20 years old still have original wiring. We recommend a quick rewiring assessment before renovation, so any upgrade can be planned around your new layout rather than redone later.
No HDB permit is needed for like-for-like rewiring within your unit, but the work should be tested and certified appropriately, with LEW sign-off if your scope requires it. If you’re changing the DB box or main supply, we handle any required EMA/SP Group notifications on your behalf.
Rewiring replaces what’s already there with the same layout in mind, just a safer cable. New wiring designs the circuit layout from scratch, which is what you’d want for a new BTO, an extension, or a major renovation where rooms are being reconfigured.
If the work involves a shared riser or hacking, most MCSTs want to sign off first. We can flag what’s likely needed once we’ve seen your unit.
House rewiring in Singapore prices generally range from $1,500 for a small HDB flat to $6,000+ for a large condo or landed home, depending on unit size, circuit count, and whether a new DB box is included. See the pricing guide above, or WhatsApp us for a free, no-obligation quote.
Yes – this is common with landed and larger condo units, and it’s best assessed alongside your rewiring scope rather than as a separate job later.
Request a rewiring or new wiring assessment → WhatsApp +65 8145 3954 · Contact us
Related reading: DB Box Upgrade Singapore · HDB Electrical Services Singapore · Landed House Electrical Services · HDB Electrical Wiring & Rewiring
