Kensington and Chelsea · SW1X

Gas safety certificate in SW1X (Belgravia)? We'll point you the right way.

Covering Belgravia, Knightsbridge, including Brompton & Hans Town, Knightsbridge & Belgravia, Nine Elms. Find Gas Safe registered engineers nearby.

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Request a gas safety certificate in SW1X (Belgravia)

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Request a gas safety certificate in SW1X (Belgravia)

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

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SW1X (Belgravia) in a nutshell

SW1X covers Belgravia, Knightsbridge, in Kensington and Chelsea and Wandsworth and Westminster. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.

Local tips for SW1X

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Two councils in one district

SW1X is split between Kensington and Chelsea and Wandsworth 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

SW1X stretches across Brompton & Hans Town, Knightsbridge & Belgravia, Nine Elms and more, so give your full postcode, not just 'SW1X', when you ask for quotes.

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

Lots of old SW1X postcodes have been retired. If an old letter shows a different postcode, use your current one.

Where's this from?Doogal/ONSPD: 402 of 926 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 SW1X

SW1W · BelgraviaSW1E · Buckingham GateW1K · Mayfair – northW1J · Mayfair – southSW1H · Buckingham GateSW3 · Chelsea

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

Frequently asked questions

Which areas does SW1X cover?

SW1X (Belgravia, Knightsbridge) includes the wards of Brompton & Hans Town, Knightsbridge & Belgravia, Nine Elms, Royal Hospital (ONS Postcode Directory via postcodes.io).

Which postcode districts are next to SW1X?

Neighbouring districts include SW1W (Belgravia), SW1E (Buckingham Gate), W1K (Mayfair – north), W1J (Mayfair – south) (ONS Postcode Directory via Doogal). A pro covering SW1X may well cover these too, so it's worth asking.

How many homes are in SW1X?

About 3,465 households and 6,505 residents at the 2011 Census, across 402 active postcodes (Doogal / ONS Postcode Directory).

Which council area is SW1X in?

SW1X sits in Kensington and Chelsea, Wandsworth, Westminster (postcodes.io). Parliamentary constituency: Battersea, Chelsea and Fulham, Cities of London and Westminster, Kensington and Bayswater.

📊 The numbers behind this page
Postcode district
SW1X 1
Areas covered
Belgravia, Knightsbridge 2
Active postcodes
402 3
Households (2011 Census, via Doogal)
3,465 2
Population (2011 Census, via Doogal)
6,505 2
Electoral wards
Brompton & Hans Town, Knightsbridge & Belgravia, Nine Elms, Royal Hospital 4
Parliamentary constituencies
Battersea, Chelsea and Fulham, Cities of London and Westminster, Kensington and Bayswater 4
Local authority
Kensington and Chelsea, Wandsworth, 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.