Bought, inherited or finally fixing up an old house? Here is what usually wears out after 30 to 50 years, which surveys to do first, the order of work that avoids paying twice, and a staged budget.
A house that is 30 to 50 years old usually has several systems wearing out at once: the original wiring, galvanised iron water pipes, the roof underlayment and gutters, the waterproofing in the bathrooms and at the wall base, and often termites. Survey first, then fix in this order: make it safe and dry, treat termites and cracks, replace wiring and pipes while the walls are open, waterproof, re-tile, then carpentry, paint and a final clean. As a worked example for a double-storey terrace house with two bathrooms, built from our cost guides (indicative Klang Valley ranges for 2026): stage 1, safety and water, RM1,300 – RM4,900; stage 2, services and wet areas, RM27,500 – RM49,000; stage 3, repaint, repairs and deep clean, RM10,000 – RM20,000. That is RM38,800 – RM73,900 in total, before new floors, a new kitchen, termite treatment or whole-envelope waterproofing. ClickBina handles whole-house refurbishment and coordinates the trades: WhatsApp us photos for a free quote.
Houses built before 1995 make up a huge share of the Klang Valley's terraces, semi-Ds and bungalows. Thirty years is past the design life of the waterproofing they were built with, and galvanised iron water pipes last about 20 to 30 years in Malaysia's humid climate. The problems tend to arrive together rather than one at a time. The damp patch, the brown water, the tripping breaker and the popping floor tile are usually separate systems reaching the end of their life in the same decade.
Our old house waterproofing guide explains the water side in detail: expired membranes, walls with no working damp-proof course, and roof tiles that can last 50 years while the underlayment beneath them goes brittle and the valley gutters rust through. This guide covers the whole house, across the trades, and the order to fix things so you only open each wall once.
Not every old house has every problem, but these are the systems to check. Costs are indicative Klang Valley ranges for 2026 from the ClickBina guide named in each row.
| System | Typical signs | Usual fix | Indicative cost (source guide) |
|---|---|---|---|
| Wiring | Rubber- or cloth-insulated cable, two-pin sockets, no earth wire, no ELCB, breakers that trip | Inspection, then a targeted upgrade or a full rewire | Full rewire RM6,000 – RM12,000 (2–3 bedroom condo), RM8,000 – RM15,000 (single-storey terrace), RM12,000 – RM20,000 (double-storey terrace) — house rewiring cost |
| Galvanised iron water pipes | Rusty or discoloured water, low pressure throughout the house, repeated leaks at joints | Re-pipe in PPR while the walls are open | Concealed PPR RM4,500 – RM7,500 (condo), RM6,500 – RM11,000 (terrace) — re-piping cost |
| Roof | Ceiling stains, leaks in heavy rain, loose ridge tiles, cracked tiles | Replace tiles and flashing; re-roof only if the damage is widespread | Cracked or broken tiles RM600 – RM2,500; flashing RM800 – RM2,000 — roof repair cost |
| Gutters and downpipes | Overflow marks on walls, sagging runs, rust at joints | Clean and flush, re-fall or replace sections | Repair RM300 – RM1,500 — gutter repair |
| Waterproofing and rising damp | Tide marks and salt bands on ground-floor walls, paint that blisters, leaks from bathrooms | Retrofit damp-proof course; bathroom re-waterproofing | DPC injection RM80 – RM150 per metre; bathroom RM1,500 – RM3,500 without hacking, RM4,500 – RM9,000 hack and rebuild — old house waterproofing guide |
| Termites | Mud tubes, hollow-sounding door frames and skirting, damaged timber | Inspection, then corrective soil treatment or a baiting system | Inspection free – RM200; corrective RM1,500 – RM4,000; baiting RM2,500 – RM6,000 — termite treatment |
| Wall cracks | Hairline plaster cracks, or wider diagonal cracks from door and window corners | Hairline: fill and paint. Wider than 3 mm or growing: engineer first | External crack repair + repaint RM800 – RM3,500 per wall; structural engineer from ~RM500 — structural crack repair |
| Floor tiles | Hollow sound when tapped, tiles lifting or popping, cracks | Replace, relay or hack and re-tile | Hack and re-tile RM12 – RM30 per sq ft, plus RM1.50 – RM3 for hacking — floor tile replacement |
| Septic tank (unsewered homes) | Slow drains, smells, overflow | Desludging | RM250 – RM800 — water & septic tank cleaning |
| Roof water tank | Sediment, a lid that no longer fits, a cracked or brittle old tank | Clean, or replace the tank | Clean RM150 – RM400; new 500–1,000 L poly tank installed RM800 – RM1,800 — our water tank cost guide |
| Grilles and metalwork | Rust at welds and the bottom rail | Treat and repaint, or replace | Mild steel window grille RM80 – RM130 per sq ft — our metal grille cost guide |
| Mould | Black spots in closed rooms, wardrobes and ceilings | Fix the moisture source, then remediate | Localised RM800 – RM2,000; full room RM1,500 – RM4,500 — mould remediation |
Send us a photo of the job on WhatsApp — we reply within the hour with a free quote.
💬 Get Your Free QuoteFor the detail behind individual rows, see older homes and pre-1990s wiring, PPR vs other pipe materials, where tiled roofs leak, the tap test for hollow tiles, wall damp and mould treatment and how termite baiting works.
A whole-house quote given without these checks is guesswork, because the biggest costs are the ones you cannot see: inside the walls, above the ceiling and under the floor. Four surveys settle most of it:
| Survey | Who does it | Indicative cost | What it tells you |
|---|---|---|---|
| Electrical safety inspection | A wireman or electrician registered with Suruhanjaya Tenaga | RM150 – RM400 (condo / small unit); RM400 – RM900 (landed, with test report) | Whether a targeted upgrade is enough or the house needs a rewire |
| Termite inspection | A pest control operator licensed by the Pesticides Board | Free – RM200 | Whether evidence is active, inactive or just conducive conditions; see what a real termite report shows |
| Leak and envelope survey | A waterproofing contractor | Leak detection RM300 – RM800 per visit, charged separately from the repair | Where the water is getting in, and which layers are due together |
| Structural check of cracks | A structural engineer | From ~RM500 | Whether a crack is cosmetic or needs structural repair first |
Tell every surveyor the house's age and what you have seen. If you are buying rather than already owning it, our guide to hidden defects in sub-sale homes lists what buyers most often find after completion.
Doing these out of order is how old-house renovations go over budget: a new bathroom is hacked open for re-piping, or a repaint blisters because the damp was never treated.
Many owners spread the work out rather than doing it all at once. Stage it so each stage protects the next. The example below is for a double-storey terrace house with two bathrooms; each total is only the sum of the ranges shown, all indicative Klang Valley figures for 2026 from our guides:
| Stage | What is in it (source guide) | Stage total |
|---|---|---|
| 1 — Safety and water | Full electrical inspection with test report RM400 – RM900 (electrical inspection) + cracked or broken roof tiles RM600 – RM2,500 (roof repair) + gutter / downpipe repair RM300 – RM1,500 (gutter repair). Termite inspection free – RM200 on top. | RM1,300 – RM4,900 |
| 2 — Services and wet areas | Full rewire, double-storey terrace RM12,000 – RM20,000 (house rewiring) + concealed PPR re-piping, terrace RM6,500 – RM11,000 (re-piping) + two bathrooms re-waterproofed, hack and rebuild, 2 × RM4,500 – RM9,000 = RM9,000 – RM18,000 (old house waterproofing) | RM27,500 – RM49,000 |
| 3 — Finishes and clean | Full repaint, deep clean, all repairs resolved and worn fixtures replaced: the “standard refurb” tier for a terrace house, RM10,000 – RM20,000 (rental refurbishment) | RM10,000 – RM20,000 |
| All three stages | RM1,300 – RM4,900 + RM27,500 – RM49,000 + RM10,000 – RM20,000 | RM38,800 – RM73,900 |
Not included: termite treatment if the inspection finds activity (RM1,500 – RM4,000 corrective), new floor tiles (priced by area at RM12 – RM30 per sq ft plus hacking), a new kitchen, and whole-envelope waterproofing, which our old house waterproofing guide puts at RM12,000 – RM50,000+ for a survey-led campaign. For a full renovation with a new kitchen and layout changes, budget by area with the renovation cost calculator (roughly RM50–90 per sq ft for a light refresh, RM90–150 for full mid-range and RM150–220+ for premium), and see the terrace house renovation guide for scope and extensions and the full renovation cost guide for other home types.
A house left empty for years (a rumah lama nobody has lived in, or one waiting for an estate to be settled) has its own list, on top of its age:
Our guide to renovating a lelong house has a first-two-weeks checklist that works for any long-empty house. Before anyone moves in, a move-in deep clean of an empty terrace house typically costs RM600 – RM900+.
An inherited family house is often the oldest house in the family, and the heirs rarely agree on what to do with it at first. Decide the purpose first, because it decides how much to spend:
| Plan | What to do to the house | Where to read more |
|---|---|---|
| Sell as-is | Make it safe and presentable only: stop leaks, fix anything dangerous, clear it out and deep clean. Let the buyer choose finishes. | Renovations that add value (the selling section) |
| Rent it out | Refurbish for durability: a standard refurb is RM10,000 – RM20,000 for a terrace, a full mid-range upgrade RM30,000 – RM70,000. | Rental refurbishment cost and renovating to rent |
| Live in it | The full sequence on this page: survey, make safe, services, waterproofing, finishes. | The staged budget above |
One legal point: until the estate is administered and the title transferred, who may authorise works on the house is a question for the estate administrator or your lawyer. Our guides to property inheritance and faraid and Muslim estates explain probate, letters of administration and the transfer; many heirs renovate once the title is transferred.
In an older condo, apartment or flat, the same ageing happens, but not all of it is your job. The building's risers, main pipes, roof and common areas are the management's responsibility (the JMB or MC). Inside your unit, the wiring, the pipes, the bathrooms and the finishes are yours. A full rewire of a 2–3 bedroom condo is RM6,000 – RM12,000 and concealed PPR re-piping RM4,500 – RM7,500. Bathroom leaks into the unit below are the classic old-condo dispute, so re-waterproof when you re-tile. Apply to the management before any work and follow the strata renovation rules.
An old-house renovation involves trades with legal requirements of their own. Whoever you hire, ask for these:
We handle whole-house refurbishment and coordinate the trades, for old, inherited and long-empty houses across the Klang Valley, in the order set out above. Jobs we take on include hacking and re-tiling, mould treatment, grilles, water tank supply and cleaning, drain unclogging, cabinet refacing and wardrobe repair, and deep, move-in and post-renovation cleaning. WhatsApp us photos of the house, the problem areas and any old plans for a free quote. A site visit is RM150, waived if you go ahead. The price is flat, with no hidden charges, and we reply within the hour.
This guide refers to the regulators and official bodies below. Rules, fees and procedures change — always confirm the current position with the source:
How we estimated prices: every RM figure on this page is quoted unchanged from the ClickBina cost guide named beside it (house rewiring, re-piping, roof repair, gutter repair, old house waterproofing, termite treatment, property inspection, structural crack repair, floor tile replacement, septic tank cleaning, water tank, metal grilles, mould remediation, electrical inspection, leak detection, rental refurbishment and cleaning). Those are typical Klang Valley market ranges for 2026, compiled from contractor quotations and supplier price lists. They are not official or fixed rates. Stage totals are simple sums of the ranges shown in the staged-budget table. Your house can only be priced properly after the surveys above.
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