Commercial plumbers across Southwark — for offices, restaurants, HMOs and managed properties in SE1, SE5, SE15, SE16 and SE17. Find directory-listed engineers below.

✅ Checked before listing — identity, insurance, trading presence, Gas Safe (where relevant).
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Commercial plumbers set their own response times and prices — confirm both and request itemised quotes before booking.

Contact verified commercial plumbers in Southwark ↓

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Commercial plumbers in Southwark listed here cover:

• Offices and commercial premises — supply and waste pipework, WC and welfare facilities, commercial kitchen plumbing
• Restaurants and hospitality — grease trap installation and maintenance, commercial kitchen drainage, mains supply
• Retail and mixed-use buildings — WC installations, supply and waste maintenance
• HMOs and multi-unit managed properties — shared supply systems, communal facilities, waste runs
• Private landlord properties — plumbing maintenance, compliance checks, annual gas safety records
• Managed residential blocks — communal pipework, water tank maintenance, shared system repairs
• Commercial boiler servicing and repair — Boiler Servicing Southwark and Boiler Repair Southwark
• Blocked drains in commercial premises — Blocked Drains Southwark

If a commercial plumbing issue is causing flooding or immediate risk, contact an Emergency Plumber Southwark — engineers are available for urgent response.

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Commercial gas work — checking the right competencies

By law, all gas businesses and engineers carrying out gas work must be on the Gas Safe Register.³

For commercial gas work, Gas Safe registration alone is not sufficient. The Gas Safe Register confirms that you must check the engineer is registered for the specific type of work — for example, catering equipment — and for the type of gas supply involved.⁷ The back of every Gas Safe engineer’s ID card lists the specific work categories they are qualified to carry out — domestic and commercial categories are listed separately.

For commercial premises involving gas-fired catering equipment, boilers, heating plant or gas pipework, always verify the engineer’s ID card covers the specific commercial category of work required before they begin.

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Legionella compliance for Southwark commercial premises and landlords

The HSE confirms that if you are an employer or someone in control of premises — including a landlord — you have a duty to understand and manage legionella risks.¹ This duty arises under the Health and Safety at Work Act 1974 and the Control of Substances Hazardous to Health Regulations 2002. Failure to comply can result in prosecution under this legislation.

The HSE states that all systems require a risk assessment, but not all systems will require elaborate control measures — a simple risk assessment may show the risks are low and being properly managed to comply with the law.¹

For commercial premises — offices, restaurants, managed blocks and HMOs — this means:

• Identifying hot and cold water systems that could present a legionella risk
• Implementing appropriate temperature controls and maintenance regimes
• Keeping records of the assessment and any control measures in place

Legionella risk assessment is a separate competency from general plumbing. Where a formal assessment is required, it should be carried out by a person with the relevant competence under HSE guidance — confirm this with any engineer you engage for legionella-related work.

For residential landlords, the HSE confirms that health and safety law does not require landlords to obtain or produce a “legionella test certificate”.² The practical requirement is to assess the risk — which may be straightforward for simple domestic systems with regular water usage and no stored cold water tanks.

We always advise landlords and commercial duty holders to document their legionella risk assessment and review it regularly — particularly when the water system changes or the property is unoccupied for any period.

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Gas Safe requirements for landlord properties in Southwark

For landlords, the HSE confirms the legal requirement under the Gas Safety (Installation and Use) Regulations 1998: landlords must issue a copy of the safety record to each existing tenant within 28 days of the check being completed, and issue a copy to any new tenants before they move in.⁶

Southwark has active selective licensing and HMO licensing schemes covering a significant number of wards across the borough. Southwark Council’s property licensing page provides current information on whether a licence is required for a specific property.⁵ Gas safety compliance is a standard licensing condition — confirm with Southwark Council’s licensing team if you are unsure of your obligations.

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Water Fittings Regulations for commercial properties in Southwark

The Water Supply (Water Fittings) Regulations 1999 apply to water fittings and water systems within scope, including commercial premises connected to the public water supply.

Regulation 3 requires that no water fitting shall be installed, connected, arranged or used in such a manner that it causes or is likely to cause waste, misuse, undue consumption or contamination of water supplied by a water undertaker.⁴ Regulation 4 requires water fittings to be of appropriate quality and standard and installed in a workmanlike manner.

For commercial premises with higher-risk appliances — commercial dishwashers, commercial kitchen equipment, cooling systems or water-cooled plant — appropriate backflow prevention is required, with the level of protection determined by the fluid category of the risk. Schedule 2 paragraph 15 requires every water system to contain an adequate device or devices for preventing backflow of fluid from any appliance, fitting or process.⁸ Commercial premises commonly involve Fluid Category 4 or 5 risks, which require higher-grade backflow protection such as RPZ valves or air gaps under Water Regs UK fluid-category guidance.⁹

For specific installations listed in Regulation 5 — including RPZ valves, baths over 230 litres, certain showers, pumps drawing over 12 litres per minute, water treatment units producing a discharge, reverse osmosis units, and water systems laid outside a building — the installer must give prior notice to the water undertaker (Thames Water in Southwark) and must not begin work until consent is given. Under Regulation 5(4), the water undertaker has ten working days from the notice to withhold consent or grant it subject to conditions; under Regulation 5(5), if no notice is given by the water undertaker within that ten-working-day period, consent is deemed to have been granted unconditionally.¹⁰ Material changes of use and new constructions are also notifiable. Confirm with your plumber whether your specific work falls within the Regulation 5 notifiable list before work begins.

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Southwark commercial property types — practical context for commercial plumbing

The practical context of a commercial plumbing job can differ widely depending on where in Southwark you are and the type of commercial premises. The notes below are general observations to help frame a call to a commercial plumber — your engineer’s site visit will confirm what your specific property actually has.

Victorian commercial terraces and converted shopfronts — Peckham SE15, Camberwell SE5, Bermondsey SE1/SE16, Walworth SE17, Borough SE1. Many small commercial units in these areas occupy ground-floor space of converted Victorian terraces, with the upper floors residential or HMO. Pipework often runs through structural party walls and may be undersized for modern usage loads — particularly a concern for restaurants, cafés and HMO conversions where the number of fixtures or occupants has increased over time. Mention any planned increase in fixture count when you call.

Wharf and warehouse conversions for commercial use — Shad Thames SE1, Butler’s Wharf SE1, Bermondsey Street SE1, Bermondsey SE16, Rotherhithe SE16, Bankside SE1. Former industrial buildings adapted for office, restaurant, gallery or live-work use often have concealed pipework runs through thick brick walls and concrete slabs. Commercial kitchen drainage and grease trap installation can be particularly complex in these properties. Mention the building type when you call.

Purpose-built office and retail developments — More London Riverside SE1, London Bridge SE1, Bankside SE1, Elephant & Castle SE17. Modern commercial buildings around the South Bank corridor (More London, The Shard quarter, Bankside) and the Elephant & Castle regeneration zone typically have planned plumbing risers and isolated branch supplies, making zoned isolation easier. Confirm with the building’s managing agent whether any planned work requires their consent before instructing.

HMOs and managed residential blocks — across all SE postcodes. Southwark has a high density of HMOs particularly in Peckham, Camberwell, Walworth and around the South Bank. Shared supply systems, communal facilities and waste runs in HMOs need particular attention to capacity and legionella risk. Where the property is in a Southwark selective licensing or HMO licensing designation, check current licensing conditions before instructing work.

Restaurants, cafés and food hospitality — Borough Market SE1, Maltby Street Market SE1, Bermondsey Street SE1, Peckham SE15, East Dulwich SE22, Lordship Lane SE22. Borough Market and the Maltby Street/Bermondsey Beer Mile cluster, plus the Peckham food scene around Bellenden Road and Lordship Lane in East Dulwich, give Southwark one of London’s denser concentrations of independent food hospitality. Commercial kitchen plumbing in these premises commonly involves higher-risk water fittings (commercial dishwashers, ice makers, water-cooled equipment) typically requiring Fluid Category 4 or 5 backflow protection, and grease trap installation that may need building control approval. Approved Document H of the Building Regulations states that drainage serving kitchens in commercial hot food premises should be fitted with a grease separator complying with BS EN 1825-1/2 or another effective means of grease removal.¹¹ Confirm scope and notification requirements with your plumber before work begins.

Heritage and conservation-area commercial premises — Bermondsey Street, Bankside, Dulwich, parts of Camberwell and Peckham. Southwark has 48 conservation areas. External works to commercial premises in conservation areas — including new external pipework, soil stacks, vents or flue penetrations — may require planning consent. Confirm with Southwark Council planning before instructing external work.

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What commercial plumbing costs in Southwark — 2026

Indicative London market ranges only — not regulated pricing. Commercial plumbing costs vary significantly by scope, premises type and compliance requirements. Always obtain itemised quotes before work begins. VAT may apply depending on the engineer’s registration status.

Service	Typical range (London 2026)
Plumber hourly rate (commercial)	from £90/hr + VAT
CP12 — Landlord Gas Safety Record	from £80
Legionella risk assessment (simple system)	from £95
Legionella risk assessment (complex commercial)	from £250
Commercial drain clearance	from £150
Commercial boiler service	from £100
Grease trap installation or service	from £200
HMO plumbing survey	from £200
Commercial pipework repair or extension	from £200

See the full London Plumbing Costs Guide 2026 →

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Why verified engineers — not a general directory

Every commercial plumbing engineer listed here is verified by our 16-point process before going live — Gas Safe registration checked against the Gas Safe Register where applicable, insurance confirmed, service coverage verified, business identity and contact details validated.

No middleman fees — every lead goes directly to the engineer.

We limit listings per borough so every engineer gets fair, equal visibility.

Customers should confirm the engineer’s specific qualifications and certifications directly before commissioning any regulated work — particularly for commercial gas, legionella risk assessment or notifiable water fittings work.

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