Local window and door supply and fit business

Quote, supply and fit new windows and doors for homeowners and landlords in your area under your own name.

Installer fixing a new window into a home's exterior wall opening.
Startup cost£5k to £25k
Monthly revenue£4k to £20k
Time needed35+ h/week
First incomeWeeks
  • £5k-25k
  • Full-time
  • Out and about

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

Official data

22,443 UK companies in this field, 24% registered in the last 2 years

SIC 43320 “Joinery installation”. Source: Companies House, November 2026.

What it is

Your own local installation business: you survey, quote, order from a manufacturer, and fit windows and doors, handling the customer from enquiry to sign-off.

Your first three steps

  1. Open trade accounts with a few window and door manufacturers and compare prices and lead times
  2. Sort insurance, a quoting template, and check how to register with a competent person scheme or work with a registered partner
  3. Win your first jobs through neighbours, local landlords and online listings, and collect reviews and photos
Who pays

Homeowners, landlords, letting agents and small property owners.

How it makes money

Fixed quote per job covering products plus fitting. You earn a margin on supplied products as well as the fitting labour.

Skills that help
  • Surveying and accurate quoting
  • Fitting windows and doors to a good finish
  • Customer service and dealing with complaints
  • Basic bookkeeping and ordering
Watch out for
  • Public liability insurance, plus employer's liability if you take on staff
  • Check Building Regulations and competent person scheme requirements for replacement windows and doors in your part of the UK
  • Take deposits carefully and consider guarantee or warranty cover, as customers often expect one
  • Consumer rights rules apply to goods and services you sell, so check what you must provide in contracts and cancellation terms
  • Cash flow risk when you pay suppliers before customers pay you

Deep research report · UK

Everything you need to start: local window and door supply and fit business

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 window fitting business?

Estimates suggest startup costs typically around £5,000 to £25,000, depending on your van, tools, insurance and how much you invest in marketing. Cash flow can be tight when you pay suppliers before customers pay you.

How much can a window and door fitter earn?

Estimated monthly revenue is typically around £4,000 to £20,000, depending on how many homeowners, landlords and letting agents you win work from and the size of each job. The estimates assume about 35 hours a week or more.

What rules should I check before fitting windows and doors?

Check Building Regulations and competent person scheme requirements for replacement windows and doors in your part of the UK. Also check consumer rights rules for contracts and cancellation terms, insurance, and how to take deposits and offer guarantee cover.

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