- Companies
- Plumbers and heating engineers
- Hamilton Air Conditioning Ltd
Hamilton Air Conditioning Ltd
- Company number
- 07583006
- Incorporated
- 29 Mar 201115 years trading
- Registered office
- Hamilton Air Conditioning Ltd Churchill House, 120 Bunns Lane, Mill Hill, London, NW7 2AS
- Nature of business
- Plumbing, heat and air-conditioning installation
Hamilton Air Conditioning Ltd is a 15-year-old private limited company registered in Mill Hill, company number 07583006, one of the UK's plumbing and heating companies. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 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 up £213K (+10.9%) on the year before, to £2.2M.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £2.4M against £229K owed within a year: more than 10 times cover.
- 2 employees 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 |
|---|---|---|---|---|---|
| 28 Feb 2025 | £2.2M | £841K | £2.4M | £229K | 2 |
| 28 Feb 2024 | £2M | £857K | £2.2M | £286K | 2 |
| 28 Feb 2023 | £1.6M | £709K | £1.9M | £324K | 2 |
| 28 Feb 2022 | £1.3M | £594K | £1.5M | £204K | 2 |
| 28 Feb 2021 | £1M | £1.1M | £1.2M | £200K | 2 |
| 28 Feb 2020 | £786K | £884K | £1M | £228K | 2 |
| 28 Feb 2019 | £571K | £703K | £739K | £190K | 2 |
| 28 Feb 2018 | -£388K | -£538K | £191K | 1 | |
| 28 Feb 2017 | £242K | £352K | £370K | £140K | 1 |
| 28 Feb 2016 | £151K | £331K | £344K | £195K |
Where Hamilton Air Conditioning Ltd is registered
The registered office is in Mill Hill (NW7), in the Barnet local authority area, London. Show NW7 2AS on a map.
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What happens if Hamilton Air Conditioning Ltd 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 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 07583006
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 March 2011 (15 years ago)
- Registered office
- Hamilton Air Conditioning Ltd Churchill House, 120 Bunns Lane, Mill Hill, London, NW7 2AS
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 29 February (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 31 August 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
Other active plumbing and heating companies.
Frequently asked questions
When are Hamilton Air Conditioning Ltd's accounts due?
Hamilton Air Conditioning Ltd's next accounts are due at Companies House by 30 November 2026 (in 48 days), covering the period to 28 February 2026.
When is Hamilton Air Conditioning Ltd's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is Hamilton Air Conditioning Ltd still trading?
Hamilton Air Conditioning Ltd 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 Hamilton Air Conditioning Ltd do?
Hamilton Air Conditioning Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Hamilton Air Conditioning Ltd?
Hamilton Air Conditioning Ltd was incorporated on 29 March 2011, 15 years ago.
What is the penalty if Hamilton Air Conditioning Ltd 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 Hamilton Air Conditioning Ltd 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.