Kensington and Chelsea · SW3

Gas safety certificate in SW3 (Chelsea)? We'll point you the right way.

Covering Chelsea, Brompton, Knightsbridge, including Brompton & Hans Town, Chelsea Riverside, Clapham Town. Find Gas Safe registered engineers nearby.

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Request a gas safety certificate in SW3 (Chelsea)

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Request a gas safety certificate in SW3 (Chelsea)

How to check a gas safety engineer is registered: see the Kensington and Chelsea page.

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SW3 (Chelsea) in a nutshell

SW3 covers Chelsea, Brompton, Knightsbridge, in Kensington and Chelsea and Lambeth and Westminster. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.

Local tips for SW3

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Two councils in one district

SW3 is split between Kensington and Chelsea and Lambeth and Westminster. 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

SW3 stretches across Brompton & Hans Town, Chelsea Riverside, Clapham Town and more, so give your full postcode, not just 'SW3', when you ask for quotes.

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

Lots of old SW3 postcodes have been retired. If an old letter shows a different postcode, use your current one.

Where's this from?Doogal/ONSPD: 868 of 1,853 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 Kensington and Chelsea page. Always double-check on GOV.UK.

Next door to SW3

SW7 · South KensingtonSW1X · BelgraviaSW11 · BatterseaSW1W · BelgraviaSW10 · West BromptonSW5 · Earl's Court

← Gas safety (CP12) across Kensington and Chelsea · all areas

Frequently asked questions

Which areas does SW3 cover?

SW3 (Chelsea, Brompton, Knightsbridge) includes the wards of Brompton & Hans Town, Chelsea Riverside, Clapham Town, Courtfield, Knightsbridge & Belgravia, Royal Hospital, Stanley (ONS Postcode Directory via postcodes.io).

Which postcode districts are next to SW3?

Neighbouring districts include SW7 (South Kensington), SW1X (Belgravia), SW11 (Battersea), SW1W (Belgravia), SW10 (West Brompton) (ONS Postcode Directory via Doogal). A pro covering SW3 may well cover these too, so it's worth asking.

How many homes are in SW3?

About 11,867 households and 22,381 residents at the 2011 Census, across 868 active postcodes (Doogal / ONS Postcode Directory).

Which council area is SW3 in?

SW3 sits in Kensington and Chelsea, Lambeth, Westminster (postcodes.io). Parliamentary constituency: Chelsea and Fulham, Cities of London and Westminster, Clapham and Brixton Hill, Kensington and Bayswater.

📊 The numbers behind this page
Postcode district
SW3 1
Areas covered
Chelsea, Brompton, Knightsbridge 2
Active postcodes
868 3
Households (2011 Census, via Doogal)
11,867 2
Population (2011 Census, via Doogal)
22,381 2
Electoral wards
Brompton & Hans Town, Chelsea Riverside, Clapham Town, Courtfield, Knightsbridge & Belgravia, Royal Hospital, Stanley 4
Parliamentary constituencies
Chelsea and Fulham, Cities of London and Westminster, Clapham and Brixton Hill, Kensington and Bayswater 4
Local authority
Kensington and Chelsea, Lambeth, Westminster 4
Households heated by mains gas only (Kensington and Chelsea built-up area)
63.5% 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.