City of Westminster · W1S

Plumbing compliance check in W1S (Hanover Square)? We'll point you the right way.

Covering Hanover Square, Savile Row, including West End. Find plumbers nearby.

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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

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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 authority
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Converted flats and bedsits

Converted houses often share pipework between flats, so a leak upstairs can become your problem. Know where your stopcock is!

Where's this from?ONS Census 2021, City of Westminster: 16.0% converted/shared houses
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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 City of Westminster page. Always double-check on GOV.UK.

Next door to W1S

W1B · Portland StreetW1J · Mayfair – southW1F · Soho – north westW1K · Mayfair – northW1W · Great Portland Street

← Plumbing & water compliance across City of Westminster · all areas

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 in converted/shared houses (City of Westminster built-up area)
16.0% 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.