Merton · SM4

Gas safety certificate in SM4 (Morden)? We'll point you the right way.

Covering Morden, Morden Park, Lower Morden, St. Helier, including Cannon Hill, Figge's Marsh, Merton Park. Find Gas Safe registered engineers nearby.

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Request a gas safety certificate in SM4 (Morden)

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Request a gas safety certificate in SM4 (Morden)

How to check a gas safety engineer is registered: see the Merton page.

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SM4 (Morden) in a nutshell

SM4 covers Morden, Morden Park, Lower Morden, St. Helier, in Merton and Sutton. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.

Local tips for SM4

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Two councils in one district

SM4 is split between Merton and Sutton. 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

SM4 stretches across Cannon Hill, Figge's Marsh, Lower Morden and more, so give your full postcode, not just 'SM4', when you ask for quotes.

Where's this from?postcodes.io (ONSPD) wards
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Mostly mains gas round here

Most homes in Merton run on mains gas, so a standard boiler-and-hob check is what most people need.

Where's this from?ONS Census 2021, Merton: 77.6% mains gas only
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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 Merton page. Always double-check on GOV.UK.

Next door to SM4

SW19 · WimbledonSM1 · SuttonSM3 · North CheamSM2 · BelmontSW20 · Merton ParkKT4 · Worcester Park

← Gas safety (CP12) across Merton · all areas

Frequently asked questions

Which areas does SM4 cover?

SM4 (Morden, Morden Park, Lower Morden, St. Helier) includes the wards of Cannon Hill, Figge's Marsh, Lower Morden, Merton Park, Ravensbury, St Helier, St Helier East, St Helier West (ONS Postcode Directory via postcodes.io).

Which postcode districts are next to SM4?

Neighbouring districts include SW19 (Wimbledon), SM1 (Sutton), SM3 (North Cheam), SM2 (Belmont), SW20 (Merton Park) (ONS Postcode Directory via Doogal). A pro covering SM4 may well cover these too, so it's worth asking.

How many homes are in SM4?

About 13,817 households and 36,338 residents at the 2011 Census, across 581 active postcodes (Doogal / ONS Postcode Directory).

Which council area is SM4 in?

SM4 sits in Merton, Sutton (postcodes.io). Parliamentary constituency: Carshalton and Wallington, Mitcham and Morden, Wimbledon.

📊 The numbers behind this page
Postcode district
SM4 1
Areas covered
Morden, Morden Park, Lower Morden, St. Helier 2
Active postcodes
581 3
Households (2011 Census, via Doogal)
13,817 2
Population (2011 Census, via Doogal)
36,338 2
Electoral wards
Cannon Hill, Figge's Marsh, Lower Morden, Merton Park, Ravensbury, St Helier, St Helier East, St Helier West 4
Parliamentary constituencies
Carshalton and Wallington, Mitcham and Morden, Wimbledon 4
Local authority
Merton, Sutton 4
Households heated by mains gas only (Merton built-up area)
77.6% 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.