Southampton · SO18

Plumbing compliance check in SO18 (Bitterne)? We'll point you the right way.

Covering Bitterne, Bitterne Park, Chartwell Green, Townhill Park, Southampton Airport, including Bargate, Eastleigh South, Harefield. Find plumbers nearby.

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SO18 (Bitterne) in a nutshell

SO18 covers Bitterne, Bitterne Park, Chartwell Green, Townhill Park, Southampton Airport, in Eastleigh and Southampton. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.

Local tips for SO18

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Two councils in one district

SO18 is split between Eastleigh and Southampton. 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

SO18 stretches across Bargate, Bitterne Park, Eastleigh South and more, so give your full postcode, not just 'SO18', when you ask for quotes.

Where's this from?postcodes.io (ONSPD) wards
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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, Southampton: 5.0% 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 Southampton page. Always double-check on GOV.UK.

Next door to SO18

SO19 · SholingSO17 · HighfieldSO14 · City CentreSO15 · ShirleySO30 · BotleySO50 · Eastleigh Town Centre

← Plumbing & water compliance across Southampton · all areas

Frequently asked questions

Which areas does SO18 cover?

SO18 (Bitterne, Bitterne Park, Chartwell Green, Townhill Park, Southampton Airport) includes the wards of Bargate, Bitterne Park, Eastleigh South, Harefield, Peartree, Swaythling, Thornhill, West End North, West End South (ONS Postcode Directory via postcodes.io).

Which postcode districts are next to SO18?

Neighbouring districts include SO19 (Sholing), SO17 (Highfield), SO14 (City Centre) (ONS Postcode Directory via Doogal). A pro covering SO18 may well cover these too, so it's worth asking.

How many homes are in SO18?

About 15,652 households and 37,078 residents at the 2011 Census, across 940 active postcodes (Doogal / ONS Postcode Directory).

Which council area is SO18 in?

SO18 sits in Eastleigh, Southampton (postcodes.io). Parliamentary constituency: Eastleigh, Romsey and Southampton North, Southampton Itchen.

📊 The numbers behind this page
Postcode district
SO18 1
Areas covered
Bitterne, Bitterne Park, Chartwell Green, Townhill Park, Southampton Airport 2
Active postcodes
940 3
Households (2011 Census, via Doogal)
15,652 2
Population (2011 Census, via Doogal)
37,078 2
Electoral wards
Bargate, Bitterne Park, Eastleigh South, Harefield, Peartree, Swaythling, Thornhill, West End North … 4
Parliamentary constituencies
Eastleigh, Romsey and Southampton North, Southampton Itchen 4
Local authority
Eastleigh, Southampton 4
Households in converted/shared houses (Southampton built-up area)
5.0% 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.