Winchester · SO21
Gas safety certificate in SO21 (Compton)? We'll point you the right way.
Covering Compton, Colden Common, Hursley, Micheldever, Owslebury, Shawford, South Wonston, Sutton Scotney, Sparsholt, Twyford, including Alresford and Itchen Valley, Ampfield & Braishfield, Badger Farm and Oliver's Battery. Find Gas Safe registered engineers nearby.
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SO21 (Compton) in a nutshell
SO21 covers Compton, Colden Common, Hursley, Micheldever, Owslebury, Shawford, South Wonston, Sutton Scotney, Sparsholt, Twyford, in Basingstoke and Deane and Eastleigh and Test Valley and Winchester. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.
Local tips for SO21
Two councils in one district
SO21 is split between Basingstoke and Deane and Eastleigh and Test Valley and Winchester. Some councils run their own landlord licensing, so check which one your home is in.
Where's this from?
postcodes.io (ONSPD) local authorityGive your full postcode
SO21 stretches across Alresford and Itchen Valley, Ampfield & Braishfield, Badger Farm and Oliver's Battery and more, so give your full postcode, not just 'SO21', when you ask for quotes.
Where's this from?
postcodes.io (ONSPD) wardsMostly mains gas round here
Most homes in Winchester run on mains gas, so a standard boiler-and-hob check is what most people need.
Where's this from?
ONS Census 2021, Winchester: 78.9% mains gas onlyEngland 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 Winchester page. Always double-check on GOV.UK.
Next door to SO21
Frequently asked questions
Which areas does SO21 cover?
SO21 (Compton, Colden Common, Hursley, Micheldever, Owslebury, Shawford, South Wonston, Sutton Scotney, Sparsholt, Twyford) includes the wards of Alresford and Itchen Valley, Ampfield & Braishfield, Badger Farm and Oliver's Battery, Colden Common and Twyford, Eastleigh North, Harewood, Oakley & The Candovers, St Bartholomew, St Michael, The Worthys, Upper Meon Valley, Whitchurch, Overton & Laverstoke, Wonston and Micheldever (ONS Postcode Directory via postcodes.io).
Which postcode districts are next to SO21?
Neighbouring districts include SO23 (City Centre), SO22 (Badger Farm), SO50 (Eastleigh Town Centre), SO53 (Chandler's Ford) (ONS Postcode Directory via Doogal). A pro covering SO21 may well cover these too, so it's worth asking.
How many homes are in SO21?
About 7,675 households and 19,762 residents at the 2011 Census, across 743 active postcodes (Doogal / ONS Postcode Directory).
Which council area is SO21 in?
SO21 sits in Basingstoke and Deane, Eastleigh, Test Valley, Winchester (postcodes.io). Parliamentary constituency: Basingstoke, East Hampshire, Eastleigh, North West Hampshire, Romsey and Southampton North, Winchester.
📊 The numbers behind this page
- Postcode district
- SO21 1
- Areas covered
- Compton, Colden Common, Hursley, Micheldever, Owslebury, Shawford, South Wonston, Sutton Scotney, Sparsholt, Twyford 2
- Active postcodes
- 743 3
- Households (2011 Census, via Doogal)
- 7,675 2
- Population (2011 Census, via Doogal)
- 19,762 2
- Electoral wards
- Alresford and Itchen Valley, Ampfield & Braishfield, Badger Farm and Oliver's Battery, Colden Common and Twyford, Eastleigh North, Harewood, Oakley & The Candovers, St Bartholomew … 4
- Parliamentary constituencies
- Basingstoke, East Hampshire, Eastleigh, North West Hampshire, Romsey and Southampton North, Winchester 4
- Local authority
- Basingstoke and Deane, Eastleigh, Test Valley, Winchester 4
- Households heated by mains gas only (Winchester built-up area)
- 78.9% 5
- ONS Postcode Directory
- Doogal
- Doogal / ONSPD
- postcodes.io
- ONS Census 2021
Made with open data. See where it all comes from. Updated 26 October 2026.