City of Westminster · W1H

Gas safety certificate in W1H (Marylebone)? We'll point you the right way.

Covering Marylebone, 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 W1H (Marylebone)

No gas safety engineer listed for W1H (Marylebone) yet. Tell us what you need and we'll find you a registered gas safety engineer, free.

Request a gas safety certificate in W1H (Marylebone)

How to check a gas safety engineer is registered: see the City of Westminster page.

See what a listing looks like

W1H (Marylebone) in a nutshell

W1H covers Marylebone, in Westminster. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.

Local tips for W1H

🏛️

Westminster council area

W1H 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
📍

Give your full postcode

W1H stretches across Marylebone, West End, so give your full postcode, not just 'W1H', when you ask for quotes.

Where's this from?postcodes.io (ONSPD) wards
📮

Postcodes change here

Lots of old W1H postcodes have been retired. If an old letter shows a different postcode, use your current one.

Where's this from?Doogal/ONSPD: 691 of 1,373 postcodes active
🔥
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 City of Westminster page. Always double-check on GOV.UK.

Next door to W1H

W1U · MaryleboneW1C · Oxford Street – westW1G · Harley StreetW1K · Mayfair – northW1W · Great Portland StreetW1B · Portland Street

← Gas safety (CP12) across City of Westminster · all areas

Frequently asked questions

Which areas does W1H cover?

W1H (Marylebone) includes the wards of Marylebone, West End (ONS Postcode Directory via postcodes.io).

Which postcode districts are next to W1H?

Neighbouring districts include W1U (Marylebone), W1C (Oxford Street – west), W1G (Harley Street), W1K (Mayfair – north) (ONS Postcode Directory via Doogal). A pro covering W1H may well cover these too, so it's worth asking.

How many homes are in W1H?

About 3,298 households and 6,371 residents at the 2011 Census, across 691 active postcodes (Doogal / ONS Postcode Directory).

Which council area is W1H in?

W1H sits in Westminster (postcodes.io). Parliamentary constituency: Cities of London and Westminster.

📊 The numbers behind this page
Postcode district
W1H 1
Areas covered
Marylebone 2
Active postcodes
691 3
Households (2011 Census, via Doogal)
3,298 2
Population (2011 Census, via Doogal)
6,371 2
Electoral wards
Marylebone, 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
  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.