Wandsworth · SW12

Gas safety certificate in SW12 (Balham)? We'll point you the right way.

Covering Balham, Clapham South, Hyde Farm, including Clapham Common & Abbeville, Clapham Park, Northcote. Find Gas Safe registered engineers nearby.

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Request a gas safety certificate in SW12 (Balham)

No gas safety engineer listed for SW12 (Balham) yet. Tell us what you need and we'll find you a registered gas safety engineer, free.

Request a gas safety certificate in SW12 (Balham)

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

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SW12 (Balham) in a nutshell

SW12 covers Balham, Clapham South, Hyde Farm, in Lambeth and Wandsworth. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.

Local tips for SW12

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Two councils in one district

SW12 is split between Lambeth and Wandsworth. 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

SW12 stretches across Balham, Clapham Common & Abbeville, Clapham Park and more, so give your full postcode, not just 'SW12', when you ask for quotes.

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

Lots of old SW12 postcodes have been retired. If an old letter shows a different postcode, use your current one.

Where's this from?Doogal/ONSPD: 594 of 1,017 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 Wandsworth page. Always double-check on GOV.UK.

Next door to SW12

SW4 · ClaphamSW17 · TootingSW2 · BrixtonSW11 · BatterseaSW16 · StreathamSW18 · Wandsworth

← Gas safety (CP12) across Wandsworth · all areas

Frequently asked questions

Which areas does SW12 cover?

SW12 (Balham, Clapham South, Hyde Farm) includes the wards of Balham, Clapham Common & Abbeville, Clapham Park, Northcote, South Balham, Streatham Hill West & Thornton, Trinity (ONS Postcode Directory via postcodes.io).

Which postcode districts are next to SW12?

Neighbouring districts include SW4 (Clapham), SW17 (Tooting), SW2 (Brixton), SW11 (Battersea), SW16 (Streatham) (ONS Postcode Directory via Doogal). A pro covering SW12 may well cover these too, so it's worth asking.

How many homes are in SW12?

About 13,384 households and 31,390 residents at the 2011 Census, across 594 active postcodes (Doogal / ONS Postcode Directory).

Which council area is SW12 in?

SW12 sits in Lambeth, Wandsworth (postcodes.io). Parliamentary constituency: Battersea, Clapham and Brixton Hill, Streatham and Croydon North, Tooting.

📊 The numbers behind this page
Postcode district
SW12 1
Areas covered
Balham, Clapham South, Hyde Farm 2
Active postcodes
594 3
Households (2011 Census, via Doogal)
13,384 2
Population (2011 Census, via Doogal)
31,390 2
Electoral wards
Balham, Clapham Common & Abbeville, Clapham Park, Northcote, South Balham, Streatham Hill West & Thornton, Trinity 4
Parliamentary constituencies
Battersea, Clapham and Brixton Hill, Streatham and Croydon North, Tooting 4
Local authority
Lambeth, Wandsworth 4
Households heated by mains gas only (Wandsworth built-up area)
69.6% 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.