- Companies
- Plumbers and heating engineers
- Ascot
- Air Supply (Windsor) Limited
Air Supply (Windsor) Limited
- Company number
- 06071927
- Incorporated
- 29 Jan 200719 years trading
- Registered office
- 9 Crossways London Road, Sunninghill, Ascot, Berkshire, SL5 0PY
- Nature of business
- Plumbing, heat and air-conditioning installation
Air Supply (Windsor) Limited is a 19-year-old private limited company registered in Ascot, company number 06071927, one of 11 plumbing and heating companies in Ascot. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets down £7,365 (-40.9%) on the year before, to £11K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £30K against £19K owed within a year: 1.6 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £11K | £30K | £19K | 0 | |
| 31 Dec 2024 | £18K | £29K | £11K | 1 | |
| 31 Dec 2023 | £7,877 | £11K | £3,118 | 1 | |
| 31 Dec 2022 | £20K | £56K | £37K | 1 | |
| 31 Dec 2021 | £9,663 | £17K | £7,702 | 2 | |
| 31 Dec 2020 | £28K | £52K | £24K | 2 | |
| 31 Dec 2019 | £750 | £26K | £25K | 2 | |
| 31 Dec 2018 | £87 | £15K | £15K | ||
| 31 Dec 2017 | £199 | ||||
| 31 Dec 2016 | £583 | £20K | £19K |
Where Air Supply (Windsor) Limited is registered
The registered office is in Ascot (SL5), in the Windsor and Maidenhead local authority area, South East. Show SL5 0PY on a map.
Other trade companies in SL5
- Autova UK LtdMotor traders
- Drive Care Hub LtdMotor traders
- Berkshire Eco Clean LimitedCleaning companies
- Sunfix Solar LtdInstallers
- SRD Recoveries LtdMechanics and garages
- The Marlow Roofermann and Sons LimitedRoofers
- Painting Precision LtdPainters and decorators
- Loyal to the Soil LtdLandscapers and gardeners
Also registered at this address
9 other companies use the same registered office as Air Supply (Windsor) Limited.
- D P S Coach Works LimitedMechanics and garages
- Detailking Group LimitedMotor traders
- Future Plumbing LimitedPlumbers and heating engineers
- Greenshoots Developments LimitedProperty developers
- Hazelwood Estates Holdings LimitedBuilders
- Renew Projects LimitedBuilders
- Tile Cleaning Agents LtdCleaning companies
- Trinity Motors LimitedMechanics and garages
- Willow Dean Homes LimitedProperty developers
What happens if Air Supply (Windsor) Limited files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 06071927
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 January 2007 (19 years ago)
- Registered office
- 9 Crossways London Road, Sunninghill, Ascot, Berkshire, SL5 0PY
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 29 November 2025
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Ascot
Other active plumbing and heating companies registered in Ascot.
- Arb Plumbing and Heating Services Ltd2010
- Bath Brains Limited2023
- Coppersmith's Plumbing & Heating Ltd2026
- Future Plumbing Limited2003
- Ian Weiss Plumbing & Heating Limited2007
- PK Heating Ltd2023
- Proflow Mechanical Ltd2026
- Russell Plumbing Limited2006
All plumbing and heating companies in Ascot · All trades in Ascot · Plumbers and heating engineers across the UK
Frequently asked questions
When are Air Supply (Windsor) Limited's accounts due?
Air Supply (Windsor) Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Air Supply (Windsor) Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Air Supply (Windsor) Limited still trading?
Air Supply (Windsor) Limited is listed as active on the Companies House register (checked 13 Oct 2026). Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Air Supply (Windsor) Limited do?
Air Supply (Windsor) Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Air Supply (Windsor) Limited?
Air Supply (Windsor) Limited was incorporated on 29 January 2007, 19 years ago.
What is the penalty if Air Supply (Windsor) Limited files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Air Supply (Windsor) Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.