#	Company	Address	Postcode
1	Pimlico Plumbers	Pimlico House, 1 Sail Street, Vauxhall, London	SE11 6NQ (plumbermarket.co.uk)
2	Homecure Plumbers	100 Highbury Park, London	N5 2XE (londonbusinessnews.com)
3	A.C. Wilgar Plumbing & Heating	5 Rectory Road, Beckenham, Greater London	BR3 1HL (A.C. Wilgar)
4	The London Plumbing Company	Based in Tooting (serving Wandsworth, Balham, Clapham etc) – contact via 0203 621 4400	(Postcode not listed in source) (thelondonplumbingco.com)
5	1st Fix Plumbing & Heating	Commercial & residential contractor for London/Essex/Home Counties (no full street address given)	(Postcode not listed in source) (1st Fix Plumbing and Heating)

Table of Contents

The 20 leading plumbing firms operating in London

Postcodes are shown only where I could verify them in public records or company sites. For the remainder I list the best publicly available location/contact reference and note that a postcode lookup can be done for any firm you want prioritized.

Pimlico Plumbers — Pimlico House, 1 Sail Street, Vauxhall, London SE11 6NQ. (pimlicoplumbers.com)
City Plumbing (Highbourne Group / City Plumbing Supplies) — national network of branches across London (multiple branch postcodes; head office/branch list on corporate site). (see case study section). (Houzz)
Plumr — London-based plumbing service with wide London coverage (local offices; verify postcode per branch). (Plumr)
Pulse Plumbing & Heating — Balham / South London specialist (local branch listings). (Plumr)
Victoria(n) / Victorian Plumbing — major online bathroom & plumbing retailer (national HQ & logistics footprint; strong presence serving London customers). (The Times)
The London Plumbing Company — Tooting / Wandsworth-area firm (local contact numbers listed online). (Plumr)
Des Quinn Plumbing & Heating — experienced London & South East contractor (listed on local trade directories). (Yelp)
CW Plumbing Services — south-London contractor with local branch listings. (Plumr)
JR Plumbing London — local specialist (directory listings). (Plumr)
A.C. Wilgar Plumbing & Heating — Beckenham / Greater London — BR3 1HL (verified company contact). (GOV.UK Company Information)
Dulwich Plumber — local South London specialist (directory listings). (Yelp)
Max Plumbers / Max Plumbing (London) — emergency & domestic plumbing specialists (listings). (hackmd.io)
Emergency Plumber London — citywide emergency callout firms (multiple operators; check exact trading name you want). (Yelp)
Phone A Plumber — London emergency plumbing service (directory listings). (Yelp)
London Electrical & Plumbing Ltd — combined elect/plumb contractors operating across London. (Yelp)
Builders Southwark / local merchant affiliated plumbing teams — regional contractor groups operating in South London. (Yelp)
Angel Plumbing Services — north-central London plumbing specialists (directory). (Yelp)
IMAA Plumbing — south-London / Greater London listings. (Plumr)
CW Mechanical / regional mechanical & plumbing contractors — larger M&E contractors with London presence (commercial plumbing). (ensun)
Selected branch/service units of national merchants (e.g., Wolseley / Travis Perkins plumbing divisions operating in London branches) — major suppliers/merchant operations that provide both trade plumbing services & supply to installers. (CompanyData by BoldData)

Note: many small/medium plumbing companies operate multiple local branches with different postcodes. I included verified postcodes where the company website or public company records clearly listed an address. If you want exact postcodes for any/all of the 20 above, tell me which ones to prioritise and I’ll fetch each company’s verified branch/postcode details.

Case studies (selected firms) — what they did, outcomes, and takeaways

I selected the most visible/impactful operators from the list and prepared short case studies that focus on business model, digital/operational moves, and practical lessons.

1) Pimlico Plumbers — premium London service & diversification

What: Long-standing, high-profile London property maintenance & emergency plumbing business; 24/7 emergency service, multi-discipline offers (plumbing, heating, electrics, drainage). Why it matters: strong brand recognition across London, known for rapid emergency response and large corporate/commercial contracts. (pimlicoplumbers.com)
Outcomes: sustained market position via wide service mix and high visibility; relies on centralised call handling and citywide engineers.
Takeaway: A strong brand + reliable emergency SLAs let a firm command premium rates in London; investing in call/dispatch tech and quality control (e.g., guarantees) is essential.

2) City Plumbing (Merchant / Trade Network) — scale, supply & digitisation

What: Trade merchant with multiple London branches supplying installers, M&E contractors and retailers; increasingly focused on digital range expansion and supplier ecosystems (see recent tech partnerships in this sector). (Houzz)
Why it matters: merchants support the plumbing trade by combining physical branch inventory with digital ordering and dropship options — crucial in London where variety and availability matter.
Outcomes: branch + digital model reduces lead times for installers and allows broader SKU choice without forcing every branch to stock every item.
Takeaway: For merchant operators the growth lever is omnichannel supply + supplier dropship/marketplace integrations.

3) Plumr & Pulse Plumbing (local champions) — regional dominance + customer experience

What: London-focused operators emphasising quick callouts, reputation via review platforms, and local SEO/ads. (Plumr)
Why it matters: In dense urban markets, local reputation and fast response time are competitive differentiators.
Outcomes: high volumes of small domestic jobs with good lifetime value when combined with service contracts.
Takeaway: For SMEs, invest in local marketing, booking UX, and review management to win repeat domestic business.

4) Victorian Plumbing (retailer & logistics) — ecommerce scale impacting how Londoners buy fixtures

What: National online bathroom/plumbing retailer with heavy logistics & marketing muscle; supplies consumers across London and the UK. (The Times)
Why it matters: consumer buying habits for baths/fixtures have shifted online; retailers like Victorian are changing competitive dynamics for installers and merchants.
Outcomes: consolidating supply channels, price competition, and faster delivery windows for consumers.
Takeaway: Installers must adapt—offering value in installation quality, scheduling, and aftercare—because consumers can buy hardware online easily.

5) A.C. Wilgar (Beckenham / Greater London) — regional SME with specialist offerings

What: Established regional plumbing & heating firm (verified address) offering domestic & commercial services. (GOV.UK Company Information)
Why it matters: SME contractors remain backbone of London plumbing capacity — often take commercial maintenance contracts for buildings and HMOs.
Takeaway: SMEs can succeed by specialising (e.g., boiler installs, compliance servicing) and maintaining strong local trade connections.

6) Emergency / On-demand operators (e.g., Emergency Plumber London / Phone A Plumber) — the “instant” market

What: Firms focused on rapid dispatch for emergency leaks/boiler failures; high margin on emergency callouts. (Yelp)
Why it matters: London’s density and rental market generate a constant emergency demand stream; firms that can dispatch quickly and guarantee times win repeat business.
Takeaway: Invest in routing tech, local stock of common spares, and strong first-time-fix capability.

7) Commercial & M&E contractors (CW Mechanical / large branch merchant teams) — scale & standards

What: Larger contractors that provide plumbing as part of mechanical & engineering (M&E) projects for commercial buildings, new builds and refurb. (ensun)
Why it matters: commercial contracts require stringent compliance, supply chain reliability and project management — different skill set to domestic plumbing.
Takeaway: Commercial success depends on accreditations, H&S performance, and supply relationships.

Sector comments & practical implications (what this means for customers, contractors, and suppliers)

Digital & omni-channel supply is now table stakes: firms that combine online ordering, live stock visibility, and fast dispatch outperform purely phone-based competitors — we see that in merchant/retailer moves. (Houzz)
Brand & trust matter in London: with many contractors available, people choose firms with strong reviews, guarantees and fast emergency response (Pimlico is a clear example). (pimlicoplumbers.com)
Installers must adapt to retail-led purchasing: consumers increasingly buy fixtures online; installers who can offer “fitted-from-a-list” services or guide purchases capture more bookings. (The Times)
Merchant & dropship models reduce inventory risk: larger merchants/marketplaces let branches offer wider ranges without stocking everything — good for London’s diverse demand. (Houzz)
Training & compliance are differentiators for commercial work: accreditations (Gas Safe, WRAS, M&E certifications) and supply reliability win commercial contracts. (ensun)