Barnet · N20

Gas safety certificate in N20 (Whetstone)? We'll point you the right way.

Covering Whetstone, Totteridge, Oakleigh Park, including Barnet Vale, Brunswick Park, Friern Barnet. Find Gas Safe registered engineers nearby.

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Request a gas safety certificate in N20 (Whetstone)

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Request a gas safety certificate in N20 (Whetstone)

How to check a gas safety engineer is registered: see the Barnet page.

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N20 (Whetstone) in a nutshell

N20 covers Whetstone, Totteridge, Oakleigh Park, in Barnet. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.

Local tips for N20

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Barnet council area

N20 is in Barnet's area. Some councils run their own landlord licensing, so it's worth checking theirs.

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

N20 stretches across Barnet Vale, Brunswick Park, Friern Barnet and more, so give your full postcode, not just 'N20', when you ask for quotes.

Where's this from?postcodes.io (ONSPD) wards
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Postcodes change here

Lots of old N20 postcodes have been retired. If an old letter shows a different postcode, use your current one.

Where's this from?Doogal/ONSPD: 536 of 909 postcodes active
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New to gas safety certificates? 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

  • Every year: a check by a Gas Safe registered engineer.
  • Within 28 days: give your tenants a copy (new tenants get it before they move in).
  • Keep it: hang on to records for at least 2 years.

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

Next door to N20

N12 · North FinchleyEN4 · Hadley WoodEN5 · High BarnetN2 · East FinchleyN14 · SouthgateN3 · Finchley

← Gas safety (CP12) across Barnet · all areas

Frequently asked questions

Which areas does N20 cover?

N20 (Whetstone, Totteridge, Oakleigh Park) includes the wards of Barnet Vale, Brunswick Park, Friern Barnet, Totteridge & Woodside, Whetstone, Woodhouse (ONS Postcode Directory via postcodes.io).

Which postcode districts are next to N20?

Neighbouring districts include N12 (North Finchley), EN4 (Hadley Wood), EN5 (High Barnet), N2 (East Finchley), N14 (Southgate) (ONS Postcode Directory via Doogal). A pro covering N20 may well cover these too, so it's worth asking.

How many homes are in N20?

About 7,360 households and 19,211 residents at the 2011 Census, across 536 active postcodes (Doogal / ONS Postcode Directory).

Which council area is N20 in?

N20 sits in Barnet (postcodes.io). Parliamentary constituency: Chipping Barnet, Finchley and Golders Green, Hornsey and Friern Barnet.

📊 The numbers behind this page
Postcode district
N20 1
Areas covered
Whetstone, Totteridge, Oakleigh Park 2
Active postcodes
536 3
Households (2011 Census, via Doogal)
7,360 2
Population (2011 Census, via Doogal)
19,211 2
Electoral wards
Barnet Vale, Brunswick Park, Friern Barnet, Totteridge & Woodside, Whetstone, Woodhouse 4
Parliamentary constituencies
Chipping Barnet, Finchley and Golders Green, Hornsey and Friern Barnet 4
Local authority
Barnet 4
Households heated by mains gas only (Barnet built-up area)
72.7% 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.