Gainsborough · DN21

Plumbing compliance check in DN21 (Gainsborough)? We'll point you the right way.

Covering Gainsborough, including Beckingham, Gainsborough East, Gainsborough North. Find plumbers nearby.

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DN21 (Gainsborough) in a nutshell

DN21 covers Gainsborough, in Bassetlaw and North Lincolnshire and West Lindsey. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.

Local tips for DN21

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Two councils in one district

DN21 is split between Bassetlaw and North Lincolnshire and West Lindsey. Some councils run their own landlord licensing, so check which one your home is in.

Where's this from?postcodes.io (ONSPD) local authority
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Give your full postcode

DN21 stretches across Beckingham, Gainsborough East, Gainsborough North and more, so give your full postcode, not just 'DN21', when you ask for quotes.

Where's this from?postcodes.io (ONSPD) wards
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Older terraces, older pipes

Gainsborough has lots of terraced homes. In older ones, ask the plumber to look at shared supply pipes and any old tanks in the loft.

Where's this from?ONS Census 2021, Gainsborough: 34.6% terraced
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New to plumbing compliance checks? Here's what to expect, how to get ready and what it costs, in plain English. Read the quick guide →

England landlord rules: quick version

  • No single certificate: but keep water, heating and sanitation in repair.
  • Legionella: assess the risk for each let.
  • CO alarms: needed where there's a fixed combustion appliance (not gas cookers).

More detail on the Gainsborough page. Always double-check on GOV.UK.

Next door to DN21

DN17 · AlthorpeDN16 · BottesfordDN10 · BawtryDN15 · AlkboroughDN9 · EpworthLN1 · Lincoln city centre

← Plumbing & water compliance across Gainsborough · all areas

Frequently asked questions

Which areas does DN21 cover?

DN21 (Gainsborough) includes the wards of Beckingham, Gainsborough East, Gainsborough North, Gainsborough South-West, Hemswell, Lea, Ridge, Scampton, Scotter and Blyton, Stow, Torksey, Waddingham and Spital (ONS Postcode Directory via postcodes.io).

Which postcode districts are next to DN21?

Neighbouring districts include DN17 (Althorpe), DN16 (Bottesford), DN10 (Bawtry), DN15 (Alkborough), DN9 (Epworth) (ONS Postcode Directory via Doogal). A pro covering DN21 may well cover these too, so it's worth asking.

How many homes are in DN21?

About 15,960 households and 37,066 residents at the 2011 Census, across 1,371 active postcodes (Doogal / ONS Postcode Directory).

Which council area is DN21 in?

DN21 sits in Bassetlaw, North Lincolnshire, West Lindsey (postcodes.io). Parliamentary constituency: Bassetlaw, Gainsborough, Scunthorpe.

📊 The numbers behind this page
Postcode district
DN21 1
Areas covered
Gainsborough 2
Active postcodes
1,371 3
Households (2011 Census, via Doogal)
15,960 2
Population (2011 Census, via Doogal)
37,066 2
Electoral wards
Beckingham, Gainsborough East, Gainsborough North, Gainsborough South-West, Hemswell, Lea, Ridge, Scampton … 4
Parliamentary constituencies
Bassetlaw, Gainsborough, Scunthorpe 4
Local authority
Bassetlaw, North Lincolnshire, West Lindsey 4
Households in converted/shared houses (Gainsborough built-up area)
0.9% 5
  1. ONS Postcode Directory
  2. Doogal
  3. Doogal / ONSPD
  4. postcodes.io
  5. ONS Census 2021

Made with open data. See where it all comes from. Updated 26 October 2026.