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A bathroom mixes water, pressure and electrics, so it’s the room where getting the details right matters most — waterproofing, shower pressure, scald safety and the line between plumbing and electrical work. These are verified plumbers covering Eltham, checked before listing, so you can contact one directly. Skip to verified plumbers ↓
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A bathroom’s wet and electrical work splits between a plumber and a registered electrician, and new showers and baths bring water-fittings and scald rules into play. If you smell gas near a boiler, leave and call National Gas on 0800 111 999.
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Coverage: verified bathroom plumbers across Eltham and the wider SE9 area — the town centre, Well Hall and the Progress Estate, Eltham Park, Eltham Green, Mottingham, New Eltham and Avery Hill.
What this covers: full bathroom refits, showers, baths, basins, wet rooms and waterproofing, and the pipework and hot-water side behind them.
Not this page? A WC that runs or won’t flush is Toilet Repairs; a single tap swap is Tap Repair & Installation; a hidden leak is Leak Detection; a blocked waste is Blocked Drains.
Costs: indicative ranges are under What it costs below — editorial estimates only.
Availability: each plumber sets their own hours, shown on their profile.
Jump to: What it covers · First fix, second fix · Showers & pressure · Baths, basins & scald safety · Waterproofing & wet rooms · Plumber or electrician? · The water fittings rules · Hard water & flats · Who’s responsible · Costs · FAQs
What bathroom plumbing covers
Bathroom plumbing spans a full refit and the individual jobs within it: fitting or moving a bath, basin, shower or WC; running the hot and cold supplies and waste behind them; installing showers and dealing with water pressure; waterproofing a wet room; and connecting the whole lot to the hot-water system. Some parts route elsewhere — a WC that runs on or won’t flush is a Toilet Repairs job, a single tap is Tap Repair & Installation, and a leak you can’t locate is Leak Detection. This page is about the bathroom as an installed system, most of all when it’s being renewed.
First fix and second fix
A bathroom refit runs in two stages. First fix, with the room stripped, is where supplies and wastes are re-run to suit the new layout, the bath and shower tray are set, and any concealed pipework and shower valves are installed and pressure-tested before they’re buried. Getting a shower to run well or a WC to sit in a new spot is decided here. Second fix is fitting and connecting the sanitaryware, sealing, and final testing once tiling and walls are done.
In Eltham’s interwar and period stock, refits often uncover old copper or lead pipework and waste runs that were extended piecemeal by earlier work — so a competent plumber checks and, where needed, renews rather than connecting new fittings to tired pipe. In a flat, the bathroom waste ties into a shared soil stack, so the layout has to work with the stack’s position, and any change to it is a building or managing-agent matter.
Showers and water pressure
Getting a shower right in Eltham is mostly about matching the shower to the water system. An electric shower heats cold mains water on demand and runs independently of the boiler — useful where hot-water flow is limited, but its circuit is electrical work (see below). A mixer shower blends stored or combi hot and cold, and its performance depends on pressure: a combi or mains-pressure (unvented) system usually drives a mixer well, while an older gravity-fed system with a tank in the loft may need a shower pump to give decent flow. Getting this wrong is the single most common cause of a disappointing new shower.
Hard water is the other factor. Thames Water says all the water in its region is hard, because it passes through chalky limestone, so scale builds on shower cartridges, valves and heads across Eltham — a reason to choose serviceable valves and to expect periodic descaling. A good plumber will size the shower to your actual system rather than fitting something that can’t perform on it.
Baths, basins and scald safety
Fitting a bath brings a hot-water safety rule into play. The government’s Approved Document G requires the hot water supplied to a bath to be limited to no more than 48°C, and this applies to baths in new homes, including those created by a change of use — not to existing homes, and it’s normally met with a thermostatic mixing valve on the bath supply. So in a newer Eltham flat or a converted building, a new bath may need that temperature limiting. In an existing home it isn’t mandatory, but the same guidance suggests considering a thermostatic mixing valve when adding or replacing a bath, particularly where the very young or very old are in the household — a sensible option to raise, not a rule to oversell. Where the hot water comes from an unvented cylinder, that’s a Building Regulations (Part G3) matter that must be installed and maintained by a suitably qualified installer, with its safety and discharge arrangements set up correctly.
Waterproofing and wet rooms
The difference between a bathroom that lasts and one that leaks is often invisible: the waterproofing behind the tiles. A wet room, or any tiled shower area, needs proper tanking (a waterproof membrane) and correct falls so water runs to the drain rather than pooling or tracking into the structure. This matters most in Eltham’s flats and converted houses, where a failure doesn’t just damage your room — it appears on the ceiling of the flat below, and becomes a liability question. Getting the tanking, the tray or former, and the falls right at first fix is what prevents that, and it’s a strong reason not to cut corners on a wet-room build.
Plumber or electrician? The Part P line
A bathroom is the one room where the plumbing/electrical boundary is a legal one, not just a practical one. A plumber handles the wet side — bath, basin, shower plumbing, pipework and waste. The electrics are different: under the government’s Approved Document P, a room containing a bath or shower is a “special location”, and installing a new circuit there — for an electric shower, a new extractor-fan circuit or new bathroom lighting — is notifiable work that must be self-certified by a registered competent-person electrician, certified by a registered third-party certifier, or notified to building control before it starts. Like-for-like replacement on an existing circuit — swapping an electric shower for the same rating on the same circuit — is generally not notifiable. And under the wiring regulations (BS 7671 Section 701), all bathroom circuits require 30mA RCD protection, with zoning rules governing what can go where around the bath and shower.
The practical upshot: for a new electric shower or new bathroom lighting, a plumber does the plumbing and a registered electrician does the notifiable electrical work — often coordinated on the same refit. Ask who’s certifying the electrical side before work starts.
The water fittings rules
Bathroom fittings sit under the Water Supply (Water Fittings) Regulations 1999, which require approved fittings and backflow prevention appropriate to the risk — relevant for showers, and for higher-risk fittings such as bidets, where backflow protection matters. As with any regulated plumbing, WaterSafe explains that approved contractors can carry out some work without advance notification to the water supplier and issue a certificate of compliance — useful evidence the installation was done correctly.
Hard water and flats
Two Eltham realities shape bathroom work. First, hard water — scale on shower valves, cartridges, heads and any heating element means choosing serviceable parts and budgeting for occasional descaling. Second, flats and conversions: a leak or a waterproofing failure in an upstairs bathroom shows up below, so establishing responsibility (your pipework versus a communal riser) and doing the waterproofing properly are both about protecting the flat beneath. On the Progress Estate and around Eltham Palace, external changes such as a new soil-vent terminal or extractor outlet may fall in a conservation area — Eltham’s conservation areas include Eltham Palace (1971), Eltham Green (1975), the Progress Estate and Well Hall Pleasaunce (1997) — so visible alterations may need planning care.
Who’s responsible — owner, leaseholder, tenant or council?
Owner-occupiers arrange the work. Royal Greenwich council tenants report bathroom repairs the council is responsible for through the council: urgent daytime 020 8921 8900, out of hours 020 8854 8888, new repairs 0808 175 6915. Private tenants contact the landlord; serious hazards such as no hot water can be reported to Royal Greenwich’s Residential Services team on 020 8921 8157, with 14 days for the landlord to respond to less serious issues first. Leaseholders and flats — your own bathroom pipework is usually yours, while shared risers, communal pipework and structure sit with the freeholder or managing agent, and a leak into the flat below can become their concern too.
What bathroom plumbing costs in Eltham
A rough orientation to sense-check a quote — not a price list, and not official market data. Full refit prices vary widely with spec and tiling.
| Job | Typical indicative range | Notes |
|---|---|---|
| Bathroom refit — plumbing (first + second fix) | £1,500–£4,000+ | Plumbing labour; excludes tiling, tiles and sanitaryware |
| Mixer shower — supply and fit | £150–£400 | Depends on valve and pipework |
| Electric shower — plumbing + fit | £150–£350 | Plus a registered electrician for a new circuit |
| Shower pump (gravity systems) | £250–£600 | Where flow needs boosting |
| Bath or basin — swap and connect | £150–£400 | Depends on access and existing pipework |
| Wet-room tanking and tray | £500–£1,500+ | Waterproofing and falls; excludes tiling |
| Thermostatic mixing valve (scald safety) | £120–£300 | On the bath supply |
Editorial estimate only — not regulated rates, not official market data, and not a substitute for written quotations. Electrical work is priced separately by a registered electrician.
Eltham is inside the London Ultra Low Emission Zone, so a non-compliant van may carry the £12.50 daily charge — check the current position.
Frequently asked questions
A plumber does the plumbing.
But a new electric-shower circuit is notifiable electrical work in a bathroom, which is a special location under Part P.
It must be done by a registered electrician or notified to building control.
A like-for-like swap on the same existing circuit is generally not notifiable.
Refits usually coordinate a plumber and an electrician.
Usually it’s a pressure mismatch.
A mixer shower needs adequate pressure.
A combi or unvented system typically drives one well.
An older gravity-fed system with a loft tank may need a shower pump.
Matching the shower to your water system is the fix.
In new homes, including change-of-use conversions, Approved Document G requires bath hot water to be limited to 48°C.
That is usually done with a thermostatic mixing valve.
It doesn’t apply to existing homes.
A thermostatic mixing valve is still worth considering where very young or very old people use the bath.
Yes.
A wet room or tiled shower area needs proper waterproofing, known as tanking, and correct falls to the drain.
Skimping shows up as a leak.
In a flat, that leak lands on the ceiling below and becomes a liability question, so it’s the wrong place to cut corners.
A leak from your own pipework is normally yours.
A leak from a communal riser or shared pipework is usually the freeholder’s or managing agent’s.
Establishing the source is the first step.
That’s why waterproofing and responsibility both matter in flats.
Often yes, but it’s a first-fix decision.
Supplies and waste, including the WC’s soil connection, need running before tiling.
In a flat, the layout also has to work with the shared soil stack.
Why directory-listed plumbers
Every plumber in our directory has been checked for identity, insurance, trading presence and Gas Safe registration where relevant before listing, and re-checked annually. Listing checks are administrative only — they don’t guarantee workmanship or ongoing compliance, and we are not a regulator; they don’t replace your own checks on the day. For water-fittings work you can look a plumber up yourself on WaterSafe, the free, water-industry-backed national register; the electrical side of a bathroom should be done by a registered competent-person electrician, and where a job touches gas — a boiler feeding the bathroom — we confirm Gas Safe registration. Some plumbers offer workmanship guarantees of 3, 6 or 12 months (look for the badge) — set by the plumber, varying in scope, not insurance-backed unless stated, with your Consumer Rights Act 2015 rights still applying. All enquiries go directly to the plumber — no per-enquiry fee, no pay-to-play ranking. See the full verification process →.
Bathroom plumbing across Eltham — areas we cover
Verified bathroom plumbers across Eltham and the wider SE9 area, including the town centre, Well Hall and the Progress Estate, Eltham Park, Eltham Green, Mottingham, New Eltham and Avery Hill.
All plumbers in Eltham · All plumbers in Greenwich
Related services
Toilet Repairs · Tap Repair & Installation · Kitchen Plumbing · Leak Detection · Blocked Drains · Central Heating Repair
Related guides
London Hard Water — The Complete Homeowner & Landlord Guide · London Plumbing Costs & Compliance Guide · How to Read a Plumbing Quote · Victorian Terrace Plumbing Guide
A bathroom is the room where water, pressure, heat and electricity all meet, so the value is in the details you don’t see: waterproofing, the right shower for your system, scald safety, and a clean line between the plumber’s work and the electrician’s. Get those right at first fix, and the finish looks after itself.
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Source provenance
Guidance on this page is drawn from primary UK sources: the government’s Approved Document P (a bathroom is a special location; new circuits are notifiable electrical work) and the IET / BS 7671 Section 701 (30mA RCD protection and zoning for bathrooms); the government’s Approved Document G (hot water to a bath limited to 48°C in new dwellings; thermostatic mixing valves); legislation.gov.uk and WaterSafe (the Water Supply (Water Fittings) Regulations 1999 — approved fittings, backflow prevention, approved-contractor certification); Thames Water (all the water in its region is hard); and the Royal Borough of Greenwich (council and private-tenant repair routing; Eltham conservation areas). Cost figures are an editorial estimate only. Local housing-stock observations are editorial context, not official data.
Sources & further reading
- GOV.UK — Electrical safety: Approved Document P (a room with a bath or shower is a special location; when electrical work is notifiable) — https://www.gov.uk/government/publications/electrical-safety-approved-document-p
- IET / BS 7671 Section 701 — Locations containing a bath or shower (30mA RCD on all bathroom circuits; zones) — https://electrical.theiet.org/media/1450/section-701.pdf
- GOV.UK — Approved Document G (Part G) FAQ (hot water to a bath limited to 48°C in new dwellings; thermostatic mixing valves) — https://assets.publishing.service.gov.uk/media/5a81a884e5274a2e8ab552a5/160321_Part_G_FAQ.pdf
- Legislation.gov.uk — The Water Supply (Water Fittings) Regulations 1999, Schedule 2 (approved fittings; backflow prevention) — https://www.legislation.gov.uk/uksi/1999/1148/schedule/2/crossheading/backflow-prevention/made
- WaterSafe — Hiring a plumber / verifying qualifications (approved-contractor certificate of compliance) — https://www.watersafe.org.uk/advice/hiring_a_plumber/verifying_qualifications/
- Thames Water — Hard water (“all the water in our region is hard, because it passes through chalky limestone”) — https://www.thameswater.co.uk/help/water-and-waste-help/water-quality/hard-water
- Royal Borough of Greenwich — Request a repair to your council home (020 8921 8900 / 020 8854 8888 / 0808 175 6915) — https://www.royalgreenwich.gov.uk/housing/request-repair/request-repair-your-council-home
- Royal Borough of Greenwich — Report a problem with a private rented home (Residential Services 020 8921 8157) — https://www.royalgreenwich.gov.uk/housing/request-repair/report-problem-private-rented-home
- Royal Borough of Greenwich — Maps and adopted character appraisals (Eltham conservation areas) — https://www.royalgreenwich.gov.uk/planning-and-building-control/conservation-and-listed-buildings/maps-and-adopted-character
- Gas Safe Register — Find and check an engineer — https://www.gassaferegister.co.uk/find-an-engineer-or-check-the-register/
- London City Hall — Ultra Low Emission Zone (£12.50 daily charge; all London boroughs) — https://www.london.gov.uk/programmes-strategies/environment-and-climate-change/pollution-and-air-quality/ultra-low-emission-zone-ulez-london
Last reviewed: July 2026 by Adiel Khan — SFEDI-accredited business advisor, 20+ years’ experience (South East Enterprise Ltd) and operator of Verified Plumbers. LinkedIn ↗ This page is checked for compliance and regulatory accuracy against the government’s Approved Documents P and G, the IET/BS 7671, legislation.gov.uk, WaterSafe, Thames Water and Royal Borough of Greenwich guidance. Source links are provided within this page where relevant.