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New bathroom, leaking shower or refit in a flat — Streatham properties can involve shared stacks, concealed services, managing-agent access and water-fittings rules. This is a directory of identity-checked, insured plumbers covering Streatham.
✅ Checked before listing — identity, insurance, trading presence, Gas Safe (where relevant).
✅ Workmanship guarantee badges on listings — 1, 3, 6 or 12 months
Bathroom work is quoted to the job — from a tap or shower repair to a full refit. Enquiries go straight to the plumber, with no per-enquiry lead fee.
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Coverage: Streatham and the SW16 area — Streatham town centre, Streatham Hill, Streatham Common, Streatham Vale and St Leonard’s. What this covers: full bathroom refits, showers and wet rooms, baths, basins, WCs and bidets, taps and mixers, and leak repairs — with the water-fittings compliance that goes with them. Related: for kitchen work see Kitchen Plumbing; for a hidden leak, Leak Detection. Costs: see What it costs. Availability: on each plumber’s profile.
Jump to: What the plumber checks · The rules that apply · Streatham’s rentals & mansion blocks · By district · Costs · FAQs
What a bathroom plumber checks first
Before specifying a shower or moving fittings, the plumber checks the available hot and cold pressure and flow, confirms the soil and waste routes and identifies any shared stack or service duct. For a leak, silicone, tray movement, waste connections, penetrations and waterproofing are tested separately; a bath or tray may leak only under a person’s weight. Wastes, overflows and seals should be water-tested before panels, boxing or finishes are closed. Concealed cisterns and wall-hung WCs also need a usable service opening and accessible frame and connection points.
The rules a bathroom fit has to meet
Work connected to the mains must comply with the Water Supply (Water Fittings) Regulations 1999. Some installations must be notified to the water company before work starts, including a bath over 230 litres and a bidet with an ascending spray or flexible hose.1
- Backflow and fittings: protection must be appropriate to the fitting and assessed fluid category. Every fitting must meet Regulation 4’s appropriate-quality, appropriate-standard and suitability requirements; recognised approvals or certification can provide evidence of compliance.1
A WaterSafe-approved plumber provides independently assessed water-fittings competence. Approved contractors can carry out some work without advance notification and can issue Certificates of Compliance within their approval scope; this is not blanket authority to self-certify every bathroom installation.2 New or altered drainage must comply with Part H and may require Building Regulations approval depending on the work and route.8 Bathroom electrical work must comply with Part P and BS 7671, with notification required only for the categories defined by the regulations.9 Streatham’s hard water can deposit scale on shower heads and cartridges, but pressure, flow, component wear and installation faults still require diagnosis.3
Streatham’s rentals, HMOs and mansion-block bathrooms
Lambeth’s first phase of selective licensing began on 2 September 2024 in four named wards, including Streatham Common and Vale and Streatham St Leonard’s. Qualifying privately rented properties in the designated wards require a selective licence unless a statutory exemption applies; properties requiring mandatory or Lambeth additional HMO licensing follow those separate schemes instead.4 Since 11 August 2025, the HMO Article 4 Direction in Streatham Common & Vale and Streatham St Leonard’s means converting a home into a small HMO can require planning permission.5
In a mansion block, ex-council block or conversion, a bathroom may connect to a communal soil stack inside boxed services, and moving a WC or cutting communal fabric can require freeholder consent. A leak may need access through a tiled bath panel, service duct or the ceiling of the flat or shop below. Newer flats and refurbishments may use concealed cisterns or wall-hung frames, so access panels and replacement-part serviceability should be confirmed before finishes close. Where testing shows the plumbing is sound but the tanking has failed, responsibility may sit with the waterproofing contractor rather than the plumber.
Find a verified bathroom plumber by district
- Streatham town centre / High Road: above-shop flats and blocks may require access below, block-manager coordination and checks on shared soil stacks before a private fixture fault is assumed.
- Streatham Hill: mansion blocks and conversions can involve stored-water pressure limits, communal risers and restricted access to concealed services.
- Streatham Common & Vale: qualifying private rentals in the designated selective-licensing wards follow the licensing scheme or the applicable HMO route, while bathroom alterations still depend on the exact lease, drainage and fabric affected.
- St Leonard’s & Streatham Wells: narrow bathrooms and fixed soil positions can limit layout changes; new wastes, trays and overflows should be tested before tiling or boxing is closed.
What it costs
| Job | Typical range (editorial estimate) | Notes |
|---|---|---|
| Replace taps / mixer / shower valve | £90–£250 | Plus parts |
| Swap a bath, basin or WC (like-for-like) | £200–£600 | Per item, depending on access |
| Fit a shower or wet room (plumbing element) | £500–£1,500+ | Tanking/waterproofing adds cost |
| Full bathroom refit (plumbing labour) | £2,000–£6,000+ | Excludes tiling/fit-out and fittings |
Editorial estimate only — a general guide. These figures are NOT regulated rates, NOT market data and NOT a published cost survey; always get a quote first. Streatham is inside the London-wide ULEZ (now 24/7) but outside the central Congestion Charge zone.6 See the London Plumbing Costs & Compliance Guide 2026.
Frequently asked questions
Some work is notifiable to the water company, including a bath over 230 litres or a bidet with an ascending spray or flexible hose. A WaterSafe-approved plumber can carry out some work without advance notification and issue a Certificate of Compliance within the plumber’s approval scope; other work still follows the normal notification route.2
Qualifying privately rented properties in the designated Streatham wards require a selective licence unless a statutory exemption applies. Properties requiring mandatory or Lambeth additional HMO licensing use those schemes instead. The HMO Article 4 Direction also affects planning permission for new small HMOs in the two named wards.45
Thames Water supplies hard water, so deposits can affect shower heads, valves, cartridges and finishes. Hard water does not normally damage the structure of a correctly installed bathroom, but components and finishes still need maintenance and any pressure, flow or installation fault must be diagnosed.3
Why verified plumbers — not a general directory
A bathroom refit in a Streatham flat touches water-fittings rules, a downstairs neighbour’s ceiling and — if it’s let — licensing conditions, so who does it matters. Every plumber on this Streatham page is checked before going live and re-verified yearly: we confirm the business is legitimately trading and verify the named contact, we check evidence of public liability insurance, we confirm they cover the SW16 area, and we keep an eye on customer feedback from across the web. For water-fittings work you can also look a plumber up on WaterSafe, the free national register (unlike gas, plumbers aren’t legally required to be on a register, so an independent check matters).7 Listed plumbers pay a flat monthly fee to be listed; that fee never buys the verification — every listing is checked on the same terms — and there’s no per-enquiry middleman fee. See the full verification process →
Related areas
Verified plumbers across Streatham and neighbouring areas, including:
- Balham
- Brixton
- Norbury
- Tooting
- Tulse Hill
Related services
Other verified plumbing services in Streatham:
- Kitchen Plumbing in Streatham
- Washing Machine & Dishwasher Installation in Streatham
- Leak Detection in Streatham
- Emergency Plumber in Streatham
- Burst Pipes in Streatham
- Blocked Drains in Streatham
- Toilet Repairs in Streatham
- Tap Repair & Installation in Streatham
- General Plumbing in Streatham
- Boiler Repair in Streatham
- Boiler Installation in Streatham
- Boiler Servicing in Streatham
- Central Heating Repair in Streatham
- Commercial Plumbing in Streatham
Related guides
- Victorian Terrace Plumbing Guide — London 2026
- London Hard Water — The Complete Homeowner & Landlord Guide 2026
- How to Find Your Stop Tap (London Homes)
- London Plumbing Costs & Compliance Guide 2026
A Streatham bathroom can involve pressure and flow checks, shared stacks, concealed services, staged leak testing, water-fittings compliance and landlord or freeholder coordination. Verified plumbers here are checked before listing.
Contact verified plumbers in Streatham ↑
Last reviewed: May 2026 by Adiel Khan — SFEDI-accredited business advisor, 20+ years’ experience (South East Enterprise Ltd) and operator of VerifiedPlumbers. LinkedIn ↗*
This page is checked for compliance and regulatory accuracy against the bodies cited on it — legislation.gov.uk, WaterSafe, Thames Water, Lambeth Council and TfL. Source links are provided within this page where relevant.
Sources & further reading
1. legislation.gov.uk — The Water Supply (Water Fittings) Regulations 1999: https://www.legislation.gov.uk/uksi/1999/1148/contents
2. WaterSafe — information for customers (approval scope, notification exemptions and Certificates of Compliance): https://www.watersafe.org.uk/about/information_for_customers/
3. Thames Water — Hard water: https://www.thameswater.co.uk/help/water-and-waste-help/water-quality/hard-water
4. Lambeth Council — Selective Licensing Scheme: https://www.lambeth.gov.uk/housing/landlords-licensing/selective-licensing-scheme
5. Lambeth Council — HMO Article 4 Direction, Streatham Common & Vale and St Leonard’s (in force 11 August 2025): https://www.lambeth.gov.uk/planning-building-control/planning-policy-guidance/article-4-direction-withdrawing-class-lb-permitted-development-right-change-use-dwellinghouses-use
6. TfL — Ultra Low Emission Zone: https://tfl.gov.uk/modes/driving/ultra-low-emission-zone
7. WaterSafe — Customer FAQs (no legal register requirement for plumbers): https://www.watersafe.org.uk/about/information_for_customers/watersafe_faqs/
8. GOV.UK — Approved Document H (drainage and waste disposal): https://assets.publishing.service.gov.uk/media/5a80cf9ded915d74e33fc8ae/BR_PDF_AD_H_2015.pdf
9. GOV.UK — Approved Document P (electrical safety and notification): https://assets.publishing.service.gov.uk/media/5a802da7ed915d74e622ceed/BR_PDF_AD_P_2013.pdf