- Companies
- Plumbers and heating engineers
- London
- Ad Air Conditioning Limited
Ad Air Conditioning Limited
- Company number
- 06956820
- Incorporated
- 9 Jul 200917 years trading
- Registered office
- 3RD Floor, 86 - 90 Paul Street, London, EC2A 4NE
- Nature of business
- Plumbing, heat and air-conditioning installation
Ad Air Conditioning Limited is a 17-year-old private limited company registered in London, company number 06956820, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Ad Air Conditioning LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 up £4,567 (+24.9%) on the year before, to £23K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £30K against £11K owed within a year: 2.7 times cover.
- 1 employee on average during the year.
- 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 Jul 2025 | £23K | £30K | £11K | 1 | |
| 31 Jul 2024 | £18K | £27K | £10K | 1 | |
| 31 Jul 2023 | £16K | £24K | £9,748 | 1 | |
| 31 Jul 2022 | £14K | £22K | £9,806 | 1 | |
| 31 Jul 2021 | £12K | £17K | £8,098 | 1 | |
| 31 Jul 2020 | £9,742 | £14K | £6,728 | 1 | |
| 31 Jul 2019 | £9,236 | £12K | £6,926 | 1 | |
| 31 Jul 2018 | £5,222 | £4,889 | £5,596 | 1 | |
| 31 Jul 2017 | £6,275 | £4,119 | £4,791 | ||
| 31 Jul 2016 | £1,192 | £862 | £862 | £6,450 |
Where Ad Air Conditioning Limited is registered
The registered office is in London (EC2A), in the Hackney local authority area, London. Show EC2A 4NE on a map.
Other trade companies in EC2A
- Simlan Management LtdCleaning companies
- Renova Secure LtdBuilders
- Auraglasspartitions LtdGlaziers
- A2D Professional Cleaning LtdCleaning companies
- Matson Co. LtdProperty developers
- Paint Hub LimitedMechanics and garages
- SJK Construction & Management LtdBuilders
- Cenlora Cleaning Group LtdCleaning companies
Shared registered office
172 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Ad Air Conditioning 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 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 06956820
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 July 2009 (17 years ago)
- Registered office
- 3RD Floor, 86 - 90 Paul Street, London, EC2A 4NE
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 29 March 2026
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 London
Other active plumbing and heating companies registered in London.
- Ad Campbell Ltd.2023
- Addeo Ltd2026
- Ade Building & Plumbing Ltd2018
- Ade Hope 247 Limited2025
- Adeptly Limited2003
- Adg Plumbing & Heating Limited2010
- Adisco Engineering Plumbing and Gas Ltd2026
- Admatech Limited2024
All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK
Frequently asked questions
When are Ad Air Conditioning Limited's accounts due?
Ad Air Conditioning Limited's next accounts are due at Companies House by 30 April 2027 (in 199 days), covering the period to 31 July 2026.
When is Ad Air Conditioning Limited's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Ad Air Conditioning Limited still trading?
Ad Air Conditioning Limited is listed as active on the Companies House register as of 1 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 Ad Air Conditioning Limited do?
Ad Air Conditioning Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Ad Air Conditioning Limited?
Ad Air Conditioning Limited was incorporated on 9 July 2009, 17 years ago.
What is the penalty if Ad Air Conditioning 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 Ad Air Conditioning Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 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.