Water tank cleaning for homes and small sites

Clean and disinfect loft cold water tanks and small storage tanks for homeowners, landlords and local businesses, priced per tank.

Startup cost£500 to £2.5k
Monthly revenue£400 to £3k
Time needed6+ h/week
First incomeWeeks
  • £500-2.5k
  • Side hustle
  • Out and about

Estimates for a small start in the UK, not guarantees.

Official data

6,083 UK companies in this field, 47% registered in the last 2 years

SIC 81229 “Other building and industrial cleaning activities”. Source: Companies House, November 2026.

What it is

Emptying, cleaning and disinfecting cold water storage tanks, such as loft tanks and small commercial tanks, then refilling and checking lids and overflows are secure.

Your first three steps

  1. Take a short course covering water hygiene and safe tank cleaning, and learn how to use disinfectants safely
  2. Buy a basic kit: wet vacuum, pump, hoses, PPE, torch and approved disinfectant
  3. Contact local letting agents, plumbers and landlords with a simple price list and offer a first tank at an introductory price
Who pays

Homeowners, landlords, letting agents, small hotels, B&Bs and offices with their own storage tanks.

How it makes money

A fixed price per tank, with extra for hard-to-reach tanks, heavy scale or a follow-up visit. Landlords and agents can bring repeat work.

Skills that help
  • Careful, hygienic working habits
  • Comfortable in lofts and tight spaces
  • Clear explaining to customers
  • Basic plumbing knowledge
Watch out for
  • Public liability insurance, and check whether your insurer wants proof of training
  • Working in lofts: fall risk, poor lighting and tight spaces, so check safe working practice
  • Disinfectant chemicals: check COSHH requirements and the rules for the water supplied to drinking taps
  • Where to dispose of dirty or chlorinated water: check with your water company and environmental regulator
  • Water fittings rules: check what work counts as plumbing and what you can carry out yourself

Deep research report · UK

Everything you need to start: water tank cleaning for homes and small sites

Researched with live web search for United Kingdom: real startup prices, the licences and rules, what others charge, a break-even example, how to find your first customers and a 30-day launch plan. With sources.

  • Startup costs with real prices
  • Licences, registration and rules
  • Pricing: what others charge
  • Break-even example
  • Finding your first customers
  • 30-day launch plan
  • Risks and how to reduce them
Ready in about 2 minutes · one-off payment, tax included

See a full sample report

Questions people ask

How much does it cost to start a water tank cleaning business?

Estimates suggest startup costs are typically around £500 to £2,500, depending on the equipment, training and insurance you choose. Get quotes for each item before you commit.

How much can a water tank cleaner earn?

Estimates suggest monthly revenue of typically around £400 to £3,000, depending on how many tanks you clean, your pricing and how many hours you work. Figures are revenue, not profit.

What rules should I check before cleaning water tanks?

Things to check: public liability insurance, safe working in lofts, COSHH requirements for disinfectants, where to dispose of dirty or chlorinated water, and which work counts as plumbing under water fittings rules.

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