HOW TO HIRE · PLUMBING & HEATING

How to hire a sump pump installer in the UK
The checks, the questions and the paperwork.

No register applies to sump pumps. The checks are the discharge route, the wiring under the Building Regulations and a backup.

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THE 60-SECOND VERSION

Hiring a sump pump installer in five steps

  1. Plan the dischargeWhere the pumped water goes — a drain, not a neighbour's garden.
  2. Who wires it?A dedicated supply by a registered electrician.
  3. Think about power cutsA battery backup or alarm keeps the cellar dry when the power goes.
  4. Existing pit or new?Cutting a new sump through a concrete floor is the bigger job.
  5. Test with waterThe pump run with water before the installer leaves.

BEFORE YOU BOOK

Check before you book

No register applies

No licence or register applies to sump pump installers in England, Wales, Scotland or Northern Ireland, so the checks fall on the wiring, the discharge route and insurance.

Ask for the business name, the insurer and a written scope for the sump pump installation.

Electrical work and the Building Regulations

If the sump pump needs a new electrical supply, that is electrical work under the Building Regulations in England and Wales. Work in a bathroom or shower room is notifiable, and so in Wales is work in a kitchen or outdoors: it needs an electrician on a competent person scheme, or building control.

Search the electrician on the Registered Competent Person Electrical register and ask for the certificate for the sump pump wiring. electricalcompetentperson.co.uk →

Public liability insurance, including water damage

No law requires a plumber to be insured for the sump pump installation, but one leaking joint can ruin a ceiling. The Consumer Rights Act 2015 gives you the right to the sump pump installation done with reasonable care and skill — insurance is what makes a claim against the installer worth something.

Ask the installer for the insurer's name and whether the policy covers water damage.

Asbestos in old floors

Under the Control of Asbestos Regulations 2012 some asbestos removal needs an HSE-licensed contractor. Cutting into an old cellar floor or lining where asbestos might be present should be planned first.

In an older building, ask how the installer will check the floor before cutting the sump pit. hse.gov.uk →

VAT

Installing a sump pump is standard-rated at 20%, the pit, the pipework and the alarm included. A trader whose taxable turnover passes £90,000 must register, charge it and show it as a separate line; one below that threshold adds none.

Ask the sump pump installer for the VAT number and whether the price includes VAT. gov.uk →

“Where will the sump pump discharge to?”

A good answer: A suitable drain, with the pipe route described.

“Who will wire the sump pump?”

A good answer: A registered electrician, with a certificate.

“Is there a battery backup or alarm?”

A good answer: Offered and priced.

“Will you cut a new sump pit or use the existing one?”

A good answer: A clear plan after looking.

“How will you test it?”

A good answer: By filling the pit with water and watching the pump cycle.

“What servicing does the pump need?”

A good answer: An interval and a price.

Getting the quote right

  • Pump model, float switch and any alarm or backup
  • Sump pit — existing cleaned or new cut
  • Discharge pipe route
  • Electrical supply and certificate, or excluded
  • Who actually attends — the installer, and who does the electrical supply, employed or subcontracted
  • The VAT number, with VAT at 20% listed separately

Walk away if

  • Pumps water onto a neighbour's land
  • Wires the pump with no certificate
  • No float switch
  • No test before leaving
LOW
£250
TYPICAL
£550
HIGH
£1,100

What a sump pump installer costs: £250–£1,100 per install

Sump pumps are priced per install; a new pit, a backup and the discharge run set the figure. Sump Pump Installation price guide →

Guide prices compiled by the Locufy team from published Irish and UK provider price lists and 2026/27 cost guides. Updated 2026.

KNOW WHAT TO LOOK FOR? NOW FIND ONE

Sump pump installers near you, with the badges that matter shown

ID checked, trader status and one score from every review — on the card, before you message anyone. Nearest first. No account needed to look.

Or post the job free and let them come to you.

  1. SurveyCellar checked and pit and discharge positions planned.
  2. PitExisting pit cleaned or a new chamber set in the floor.
  3. PumpPump and float switch fitted.
  4. DischargeOutlet pipe connected to a drain.
  5. TestPit filled with water, pump cycled.

Sump
A pit at the lowest point where water collects.
Float switch
Starts the pump when water rises.
Battery backup
Runs the pump in a power cut.
Discharge pipe
Carries pumped water away.
Non-return valve
Stops pumped water running back.
Cavity drain membrane
A wall and floor lining that channels water to the sump.

AFTER

When the job is done

Test it monthlyPour water into the pit and watch the pump start and stop.
Keep the electrical certificateFrom the electrician who connected it.
Note the service intervalAnd the backup battery's life.
Leave the reviewReviews on Locufy are tied to a booking, so yours about the sump pump installation carries weight. If something is not right, the make-it-right step gives the sump pump installer the first chance to fix it before it is published.

STEP 1Complain to the sump pump installer firstWrite it down: what the sump pump installer did, what is wrong with the sump pump installation and what would fix it. Reasonable care and skill is the standard section 49 of the 2015 Act sets; if the sump pump installation missed it, ask for the work to be redone free, or for part of the price back.
STEP 2Use the make-it-right stepIf you rate the sump pump installation under four stars, Locufy asks whether to send the problem to the sump pump installer first, and we follow it through before your review goes up.
STEP 3Trading Standards, through the helplinesFor advice about the sump pump installation, or to have the complaint passed to Trading Standards, call the Citizens Advice consumer helpline on 0808 223 1133 (England and Wales), Advice Direct Scotland on 0808 800 9060, or Consumerline on 0300 123 6262 in Northern Ireland.
STEP 4Small claims, if money is owedA claim against the sump pump installer that will not settle can go to court without a lawyer — the small claims track for up to £10,000 in England and Wales, simple procedure for up to £5,000 in Scotland, and the small claims court for up to £5,000 in Northern Ireland.

Hiring a sump pump installer: questions people ask

No register applies. The electrical supply must meet the Building Regulations in England and Wales.

An electrical certificate for the pump's supply, and an invoice for the installation.

To a suitable drain; agree the route before installation.

£250–£1,100 per install, about £550 typical. The sump pump installation price guide has the detail; enter your town above for installers near you.

A battery backup or alarm keeps it working in a power cut, often when you need it most.

Half a day for a replacement pump, one to two days for a new pit.

MORE GUIDES

More hiring guides in plumbing & heating

How to hire: Drain RepairHow to hire: Drain UnblockingHow to hire: Leak DetectionHow to hire: PlumberHow to hire: Pipework InstallationHow to hire: CCTV Drain SurveyHow to hire: Emergency PlumberHow to hire: Burst Pipe RepairAll 701 hiring guides →

Sump pump installers near you

Sump pump installers in LondonSump pump installers in ManchesterSump pump installers in BirminghamSump pump installers in GlasgowSump pump installers in BelfastAll sump pump installers on Locufy →

Sources — checked October 2026

  1. Registered Competent Person Electrical register
  2. gov.uk — Approved Document P: electrical safety in dwellings (England)
  3. gov.wales — building regulations: electrics
  4. HSE — deciding if asbestos work must be done by a licensed contractor
  5. Consumer Rights Act 2015, section 49 — reasonable care and skill
  6. Citizens Advice — more help with a consumer issue (England)
  7. Buildings and construction (VAT Notice 708) — 2.1 Construction services: work to an existing building is normally standard-rated
  8. GOV.UK — VAT rates
  9. GOV.UK — Register for VAT: when to register