Pipe Repair & Repiping in London: When to Fix, When to Replace

The first step is recognising warning signs before a major failure occurs. Discoloured water (brown or metallic tints), reduced water pressure, visible corrosion or green deposits on copper fittings, and unexplained damp patches in walls or under floorboards all indicate deteriorating pipes. Older properties in London are particularly vulnerable; homes built before 1970 often contain galvanised steel pipes that fail after 50–60 years, while post-1970s copper installations may suffer pinhole leaks after 40+ years in areas with naturally acidic water.

You can request a CCTV pipe survey from a qualified plumber, which costs between £150–£400 and provides definitive evidence of blockages, corrosion, or structural damage. This inspection is invaluable when planning repairs or negotiating with your insurance provider, as it documents the extent of the problem. Slow drainage, recurring blockages, and wet rot in nearby woodwork are also red flags that pipes need professional assessment.

A single burst or pinhole leak can often be repaired locally at a cost of £150–£500, depending on location and accessibility. However, if you've identified multiple problem areas, corrosion throughout the system, or ongoing leaks within two years, a full repiping becomes more cost-effective long-term. The decision also depends on your home's age, pipe material, and water quality.

Whole-home repiping typically runs £4,000–£12,000+ in London, a significant investment that includes labour, materials, and making good walls and flooring. Yet this single project eliminates recurring callout fees, prevents emergency failures, and often improves water pressure and quality permanently. For homes with original galvanised pipes, hard water issues, or frequent complaints from tenants, repiping pays for itself within 5–10 years through avoided emergency repairs. Most London plumbers recommend repiping if more than 25% of your system shows signs of failure.

Copper has been the gold standard in UK plumbing for decades. It's durable (50+ year lifespan), corrosion-resistant in most water conditions, and recyclable. A full copper repipe in London typically costs £6,000–£10,000 for a three-bedroom house, with labour making up 50–60% of the total. Copper is also favoured by insurance companies and adds resale value.

PEX (cross-linked polyethylene) is increasingly popular for new installations and repiping projects. It's flexible, cheaper than copper (£4,500–£7,500 for a full repipe), installs faster, and resists freezing better. However, some older insurers or mortgage lenders hesitate to accept it, and it can degrade under ultraviolet light if exposed. PEX is ideal for underfloor systems and properties where speed and budget are priorities.

CPVC (chlorinated polyvinyl chloride) is rigid plastic, budget-friendly (£4,000–£6,500 for a full repipe), and accepts standard fittings. It's less common in London than copper or PEX but suitable for homes where minimal disruption is needed. CPVC can become brittle in very cold conditions and has a shorter lifespan than copper (30–40 years).

Labour costs in London are significantly higher than regional UK averages. Experienced plumbers charge £50–£75 per hour, with repiping jobs typically requiring 40–80 hours depending on property size, pipe accessibility, and material choice. Materials account for the remainder: copper tube costs £8–£12 per metre, PEX costs £3–£6 per metre, and CPVC costs £2–£4 per metre.

For a typical London three-bedroom house, budget as follows: copper repipe £6,500–£10,000, PEX repipe £4,500–£7,500, CPVC repipe £4,000–£6,500. These figures assume straightforward access (not historic plasterwork requiring specialist reinstatement) and no structural surprises. Disruption costs—such as making good decorated walls, removing and relaying floorboards, or replastering—add 15–25% to the base price. Emergency repairs for burst pipes, typically charged at call-out rates (£120–£200 plus parts), are far more expensive and disruptive.

Many London plumbers offer fixed-price quotes after a site survey; always obtain at least three written quotes before committing. Check that quotes include all materials, labour, VAT at 20%, site clearance, and making good.

A complete repipe typically takes 3–7 working days for an average London home, depending on the property's layout, number of storeys, and chosen material. Victorian terraces with complex pipework and multiple access points may extend to 10 days, while modern flats with simpler systems can finish in 2–3 days. The schedule also includes: initial survey and marking out (half day), pipe removal and installation (main phase, 2–5 days), pressure testing and commissioning (1 day), and making good decoration or flooring (1–2 days).

Planning is essential; you'll have limited water access during installation, so arrange alternative facilities (temporary water supply) if the work spans multiple days. Many London properties have limited external access, which can slow material delivery and waste removal. Your plumber should provide a detailed schedule upfront and maintain communication if delays arise. Choosing a local, established firm with positive reviews ensures experienced crews familiar with London's varied building types.

If the problem stems from accidental damage (burst pipe from freezing, for example), your buildings insurance may cover repair costs subject to the excess. Many insurers require quotations from approved contractors or at least two independent quotes. For gradual deterioration (corrosion, wear), claims are typically refused unless your policy explicitly includes 'accidental damage'. Check your documents carefully and inform your insurer before committing to work.

When obtaining quotes from London plumbers, specify the scope clearly: do they include removing old pipes, disposal of materials, pressure testing, and redecoration? Are they registered with competent person schemes (such as FGAS or building control approved)? Do they offer guarantees on labour (typically 1–5 years) and materials (usually 5–10 years for pipes themselves)? ProvenQuote helps you compare verified plumbers in London, each with documented customer reviews and transparent pricing. Request at least three quotes and ask each firm how they'd handle unexpected complications—original lead pipes, asbestos in old lagging, or structural issues discovered during work.