House Rewiring Cost in South Africa: A Complete 2026 Pricing Guide

How rewiring is priced in South Africa

A rewiring quote is built up from the circuits: each lighting circuit, plug circuit, and dedicated circuit (stove, geyser, aircon) is priced as its own line, covering new SABS-approved cable from the DB board, new plug points and switches on that circuit, proper earthing, and the labour to run it — through the roof space where possible, chased into walls where not. On top of the circuits sit three project items:

• The DB board — a rewire almost always includes a modern board with earth leakage protection and labelled breakers, because the old board is part of what failed.
• Making good — closing and skimming wall chases to a paint-ready finish. This is real labour, and its absence is how cheap quotes get cheap.
• Testing and certification — every circuit tested and the whole installation signed off with a Certificate of Compliance.

This per-circuit build-up matters for one big reason: it makes the work phaseable. An itemised quote lets you replace the dangerous circuits now and schedule the rest — which turns an intimidating lump sum into a plan.

Does your house actually need rewiring?

Not every old house needs a full rewire, and a trustworthy electrician will tell you which circuits are fine. But some findings are non-negotiable. The clear signs:

• Cloth- or rubber-insulated cable in the roof. Insulation from that era is now brittle and perished — this wiring is at end of life regardless of whether it still works.
• Circuits with no earth wire. Without earth, a fault can make appliance casings and light fittings live. Any circuit without earth should be first in the queue.
• Dead or intermittent plug points — connections failing somewhere in the wall.
• Tripping when more than a couple of appliances run — circuits overloaded far beyond what the house was wired for.
• A DB board extended piecemeal over decades — mixed breakers, no earth leakage, scorching behind the cover.
• Age. A home wired more than 40 years ago and never upgraded almost always needs at least partial rewiring — common across the older housing stock in Paarl, Wellington, Parow, Goodwood and the Stellenbosch historic core.

The honest starting point is an assessment that tests every circuit — insulation resistance, earth continuity, and the state of the board — and produces a circuit-by-circuit verdict. That report is what turns "the wiring is old" into "these four circuits are dangerous, these three are fine".

Full house rewiring costs

Where a project lands in its range depends mostly on the number of circuits and points, the wall construction, and roof access — covered under what affects the price below. Timing-wise, a full rewire of a three-bedroom home takes one to two weeks, sequenced room by room so the house keeps power overnight and stays liveable throughout.

Phased rewiring: spreading the cost

The full-rewire number stops many homeowners from doing anything — which leaves the dangerous circuits live. The phased approach fixes that: replace the worst circuits first, schedule the rest, and spread the cost over months or years instead of one invoice.

The priority order is safety-driven: circuits without earth first, then perished plug circuits (they carry the load and the fire risk), then lighting circuits, which tend to age best. Each completed phase is tested and certified for the work done, so the installation gets progressively safer and the paperwork stays clean.

DB boards and upgrades done alongside a rewire

A rewire is the natural moment to bring the rest of the installation up to modern standards — the electrician is already in the roof and at the board, so the marginal cost is at its lowest it will ever be:

None of these are obligatory — but pricing them inside the rewire quote versus as standalone projects later usually saves 20–40% on each, because the access, board work and certification are shared.

What affects the final price

• Number of circuits and points. The quote is built from these — a four-bedroom home with a workshop simply has more lines than a lock-up-and-go.
• Wall construction. Chasing into plastered brick is routine; solid stone and rammed-earth walls in older Boland homes are slow, careful work. Face-brick walls may need surface trunking instead.
• Roof access. A walkable roof void makes cable runs fast. Flat roofs, low pitches and insulated ceilings slow everything down.
• Making-good standard. Chases closed and skimmed paint-ready is the professional norm — confirm it, because "customer to fill chases" is a real line on cheap quotes.
• Occupied vs empty house. Working around a family, furniture and daily life adds sequencing time. An empty house (or a renovation) is the cheapest rewiring environment.
• Heritage properties. Homes older than 60 years — common in central Paarl, Stellenbosch, Franschhoek and Wellington — may need heritage consideration where the work affects the fabric of the building. Factor the admin time in.

What should be in a rewiring quote

• An itemised list per circuit — what each circuit covers and costs, not one "rewire house" lump sum. This is what makes phasing (and comparing) possible.
• Points and switches counted — how many plug points and switches are included, and the rate for extras.
• The DB board specified — board model or spec, earth leakage, surge protection, labelling.
• Cable specified — SABS-approved cable, sized per circuit.
• Making good stated — chases closed and skimmed to paint-ready, in writing.
• A room-by-room sequence and duration — so you know the house stays liveable and when each area is done.
• Testing and the CoC — every circuit tested, full Certificate of Compliance on completion, included in the price.

Red flags on a rewiring quote

• One lump sum, no circuit breakdown. You can't compare it, can't phase it, and can't hold anyone to it when "extras" appear.
• No assessment before the quote. A rewiring price given without testing the circuits is a guess — and it usually grows once the roof is opened.
• Everything condemned. The opposite failure: not every old house needs every circuit replaced. If the verdict is "all of it" with no test results behind it, get a second assessment.
• No mention of making good. Open chases through every room turn an electrical project into a plastering and painting project you didn't budget for.
• No CoC, or certification "extra". The Certificate of Compliance is not an add-on — it is the legal proof the work was done properly, and it belongs in the price.
• Cash price, no paperwork. Uncertified electrical work is illegal, voids insurance, and resurfaces at transfer. On rewiring — the job whose whole point is safety and insurability — this defeats the purpose entirely.

Frequently asked questions