City of Westminster · W1S
Gas safety certificate in W1S (Hanover Square)? We'll point you the right way.
Covering Hanover Square, Savile Row, including West End. Find Gas Safe registered engineers nearby.
Free to use · No sign-up to search · Always check their registration before you book
Request a gas safety certificate in W1S (Hanover Square)
No gas safety engineer listed for W1S (Hanover Square) yet. Tell us what you need and we'll find you a registered gas safety engineer, free.
Request a gas safety certificate in W1S (Hanover Square)
How to check a gas safety engineer is registered: see the City of Westminster page.
W1S (Hanover Square) in a nutshell
W1S covers Hanover Square, Savile Row, in Westminster. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.
Local tips for W1S
Westminster council area
W1S is in Westminster's area. Some councils run their own landlord licensing, so it's worth checking theirs.
Where's this from?
postcodes.io (ONSPD) local authorityMostly mains gas round here
Most homes in City of Westminster run on mains gas, so a standard boiler-and-hob check is what most people need.
Where's this from?
ONS Census 2021, City of Westminster: 56.1% mains gas onlyEngland 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 City of Westminster page. Always double-check on GOV.UK.
Next door to W1S
Frequently asked questions
Which areas does W1S cover?
W1S (Hanover Square, Savile Row) includes the wards of West End (ONS Postcode Directory via postcodes.io).
Which postcode districts are next to W1S?
Neighbouring districts include W1B (Portland Street), W1J (Mayfair – south) (ONS Postcode Directory via Doogal). A pro covering W1S may well cover these too, so it's worth asking.
How many homes are in W1S?
About 208 households and 299 residents at the 2011 Census, across 554 active postcodes (Doogal / ONS Postcode Directory).
Which council area is W1S in?
W1S sits in Westminster (postcodes.io). Parliamentary constituency: Cities of London and Westminster.
📊 The numbers behind this page
- Postcode district
- W1S 1
- Areas covered
- Hanover Square, Savile Row 2
- Active postcodes
- 554 3
- Households (2011 Census, via Doogal)
- 208 2
- Population (2011 Census, via Doogal)
- 299 2
- Electoral wards
- West End 4
- Parliamentary constituencies
- Cities of London and Westminster 4
- Local authority
- Westminster 4
- Households heated by mains gas only (City of Westminster built-up area)
- 56.1% 5
- ONS Postcode Directory
- Doogal
- Doogal / ONSPD
- postcodes.io
- ONS Census 2021
Made with open data. See where it all comes from. Updated 26 October 2026.