Breakers that keep tripping, sockets that scorch, or a resale flat whose wiring is older than you are: at some point the question is no longer which point to fix but whether to rewire. Rewiring replaces the cables, circuits and usually the distribution board (DB box) behind your walls, so it costs far more than a few new power points, and quotes vary widely.
This guide sets out what Singapore electrical contractors publish for 2026 rewiring: HDB flats by size, condos, landed houses, and offices, shops and F&B outlets. Every figure links to the page it comes from, checked on 13 October 2026. Prices are indicative and shown as each source publishes them, not averaged. To find a contractor, browse the Electricians directory.
Rewiring cost in Singapore: the short answer
Published 2026 ranges put a full rewire of a 3-room HDB flat at about S$1,500–4,000 and a 4-room at about S$1,800–5,500, with one contractor quoting higher at S$3,800–6,500 and S$4,800–7,800 respectively. A partial rewire of only the failing circuits is about S$1,200–4,500. Condos are about S$3,000–14,000 and landed houses from about S$14,000 upwards. For commercial premises, one contractor publishes S$6,000–15,000 for a small shop and S$15,000–45,000 for a 1,000–3,000 sqft office. Several sources quote before GST.
Published rewiring prices (2026)
We checked each page on 13 October 2026. Most are contractors’ own price guides; note whether a range assumes exposed trunking or concealed wiring, and whether a new DB box is included.
| Job | Published price (indicative) | Source and notes |
|---|---|---|
| Partial rewire (failing circuits or 1–2 rooms) | S$1,200–3,000 (RK E&C); S$1,800–4,500 (Trust Electricians) | RK E&C guide, Trust Electricians |
| Single room rewiring | S$600–1,200 | MM Engine price list; excludes GST |
| 2-room HDB, full rewire | S$1,700–2,400 exposed casing (MM Engine); from about S$1,800–3,000 (Lito) | MM Engine HDB guide, Lito Electrical |
| 3-room HDB, full rewire | S$1,500–2,500 (Fortified); S$2,300–3,400 exposed (MM Engine); S$2,500–4,000 incl. new DB (RK E&C, Lito); S$3,800–6,500 (Trust Electricians) | Fortified, MM Engine, RK E&C, Lito, Trust Electricians |
| 4-room HDB, full rewire | S$1,800–3,500 (Fortified); S$2,400–4,000 exposed (MM Engine); S$3,200–5,500 (Lito); S$3,500–5,500 incl. new DB (RK E&C); S$4,800–7,800 (Trust Electricians) | Fortified, MM Engine, Lito, RK E&C, Trust Electricians |
| 5-room or Executive HDB, full rewire | S$2,500–4,500 (Fortified); S$4,000–6,500 for 5-room (Lito); S$4,500–7,000 (RK E&C); S$5,800–9,500 (Trust Electricians); S$6,000–8,500 for 5-room exposed (MM Engine) | Fortified, Lito, RK E&C, Trust Electricians, MM Engine |
| Concealed wiring instead of exposed trunking | Add about 30–50% | MM Engine HDB guide; for hacking, plastering and repainting |
| Making good walls after concealed work | S$400–1,200 | RK E&C guide; often left out of quotes |
| DB box replacement | S$550–1,200 on sound wiring (RK E&C); S$650–1,200 (Fortified); adds S$850–2,200 to a rewire (Trust Electricians) | RK E&C, Fortified, Trust Electricians |
| Single dedicated circuit (water heater, oven) | S$250–500 | RK E&C guide |
| Condo, full rewire | S$3,000–9,000 for 2- or 3-bedroom (MM Engine); S$7,500–14,000 for 1,000–1,400 sqft (Trust Electricians) | MM Engine installation guide, Trust Electricians |
| Landed house, full rewire | S$14,000–56,000 for terrace or semi-D (MM Engine); S$18,000–35,000 for an intermediate terrace (Trust Electricians) | MM Engine price list, Trust Electricians |
| Small retail unit (300–500 sqft) | S$6,000–15,000 | Trust Electricians commercial |
| Office (1,000–3,000 sqft) | S$15,000–45,000 | Trust Electricians commercial |
| F&B kitchen | S$12,000–35,000 | Trust Electricians commercial |
| Office electrical fit-out, per sqft | S$8–20 (Fortified); S$8–25 (MM Engine) | Fortified, MM Engine installation guide |
| Three-phase DB installation | S$1,500–4,000 | MM Engine installation guide; commercial |
| LEW certification only (wiring already done) | S$300–800 | Fortified |
| Electrician call-out and diagnosis | From S$100 | Get Electrician price list; usually absorbed if you go ahead |
Why HDB rewiring quotes vary so much
For a 4-room flat the published figures run from S$1,800 to S$7,800. Much of the gap is scope. MM Engine‘s table assumes exposed PVC trunking and says to add 30–50% for hacking and concealed wiring. RK E&C includes a new DB box in its ranges but lists making good the walls (S$400–1,200) as a separate line. The number of points matters too: MM Engine estimates 45–65 electrical points for a 4-room flat and 65–85 for a 5-room, and every extra socket, light and aircon isolator adds to the bill. Before comparing totals, line quotes up on the same scope.
Full or partial rewire?
RK E&C puts a partial rewire at 1–2 days and a full 4-room rewire at 3–5 working days, and suggests rewiring fully if you are renovating anyway, while a partial rewire plus a DB upgrade can make sense when only one or two circuits are failing. Trust Electricians notes that pre-2000 HDB flats commonly have PY cable, which turns brittle with age. Ask the electrician to test the existing circuits and explain in writing why they recommend full or partial work.
Rewiring offices, shops and F&B outlets
Commercial rewiring is almost always quoted after a site survey, because loads, three-phase supplies, landlord rules and fire-safety requirements vary from unit to unit. Trust Electricians publishes indicative ranges of S$6,000–15,000 for a 300–500 sqft retail unit, S$15,000–45,000 for a 1,000–3,000 sqft office and S$12,000–35,000 for an F&B kitchen, and says a small shop typically takes 1–2 weeks and a mid-sized office 2–4 weeks. Much of the work is done at night or on weekends so the business can keep trading, which can carry surcharges.
Fortified lists typical commercial scopes: surface trunking for the office floor, dedicated circuits for server racks, UPS isolation, emergency lighting and fire-rated cable in escape routes. Under EMA rules, the work must be done by a Licensed Electrical Worker (LEW) of the right class, and many non-domestic premises also need an electrical installation licence; our electrician cost guide covers the licence and LEW fees. If you are fitting out a new space, rewiring is one line in the wider office renovation cost; if you are leaving one, electrical works are often part of office reinstatement.
What drives rewiring cost
- Size and number of points: more rooms mean more circuits, longer cable runs and more sockets, switches and isolators.
- Exposed or concealed: PVC trunking is cheapest; chasing walls or running cable above a false ceiling adds labour and making good.
- DB box: most full rewires include a new board with modern breakers and residual current protection, which may be priced separately.
- Heavy loads: induction hobs, ovens, water heaters, multiple aircon units and EV chargers need dedicated circuits.
- Condition of the old wiring: brittle or burnt cable takes longer to strip out and trace.
- Property type and rules: condos and commercial buildings set working hours and approval steps; landed houses have more floors and often a three-phase supply.
- Timing: after-hours and weekend work, common for shops and offices, costs more.
What is usually included, and what is not
A typical rewiring quote, according to Lito Electrical, covers new wiring for power and lighting circuits, new switches and sockets, light points, water heater, aircon and cooker hood points, testing after installation and labelling the circuits at the DB box. MM Engine warns that some quotes leave out:
- SP Group power shutdown and reconnection coordination;
- disposal of the old cable, switches and sockets;
- heavier-gauge circuits for induction hobs and ovens;
- LEW endorsement and submission paperwork, which some contractors bill separately;
- making good: plastering and repainting walls after concealed work;
- GST, which several price guides exclude.
Rewiring is best done before carpentry and a false ceiling go in, and the walls usually need repainting afterwards; see our painting cost guide.
Some electrical contractors to ask for a rewiring quote
The first four companies are listed in SG Directory. They are not ranked, and none paid to appear. Descriptions summarise each company’s own website. For per-point prices on smaller jobs, see our electrician cost guide.
- BSH Engineering (SG Directory listing · website): electrical contractor since 1993 with in-house LEWs, handling office, retail and F&B fit-outs as well as residential work.
- Cheng Seng Electric (SG Directory listing · website): licensed electrical contractor serving commercial and industrial clients, including installations, infrared scanning and EV chargers.
- LCE Engineering (SG Directory listing · website): BCA-registered MEP and electrical contractor working on commercial, industrial and infrastructure projects.
- Mr Electrician (SG Directory listing · website): installations, emergency repairs and LEW services for homes, MCSTs and commercial and industrial premises.
- Get Electrician (website): LEW electrical service offering partial and full HDB rewiring, DB box upgrades, new circuits and office and shop electrical works, with a call-out from S$100 and a fixed quote confirmed before work starts.
How to get an accurate rewiring quote
- Share your floor plan, the property type and age, and photos of the DB box and any burnt or loose points.
- List every socket, light, aircon, water heater and appliance point you want, so all quotes price the same number of points.
- Say whether you want exposed trunking or concealed wiring, and whether a false ceiling or renovation is planned.
- Ask whether a new DB box, making good, disposal, LEW endorsement and GST are included.
- Ask for the LEW’s name and licence number, and compare two or three written, itemised quotes.
Red flags
- A lump-sum quote that doesn’t list circuits, points, accessory brands or the testing scope.
- No named LEW, or reluctance to share a licence number before work starts.
- A price far below published ranges, which often means no new DB box, no making good or no certification.
- No written test results or certificate at handover.
- Pressure to rewire the whole unit without testing the existing circuits first.
Rewiring cost: FAQ
How much does it cost to rewire a 4-room HDB flat?
Published 2026 ranges run from about S$1,800–3,500 to S$3,500–5,500, with one contractor quoting S$4,800–7,800. Exposed trunking is cheapest; concealed wiring adds about 30–50%.
How much does partial rewiring cost?
About S$1,200–3,000 for selected failing circuits (RK E&C) and S$1,800–4,500 for one or two rooms (Trust Electricians). MM Engine lists single-room rewiring at S$600–1,200 before GST.
How long does rewiring take?
One published guide gives 1–2 days for a partial rewire and 3–5 working days for a full 4-room HDB rewire. Another gives 5–12 working days for a 4- or 5-room flat, 1–3 weeks for a condo and 2–4 weeks for a landed house.
How much does it cost to rewire an office?
One contractor publishes S$15,000–45,000 for a 1,000–3,000 sqft office and S$6,000–15,000 for a 300–500 sqft shop. Office electrical fit-outs are also quoted at about S$8–25 per sqft.
Do I need a licensed electrician to rewire?
Yes. In Singapore, new wiring, new circuits and DB box changes must be done or supervised by a Licensed Electrical Worker registered with EMA. Ask for the licence number before work starts.
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