- Companies
- Installers
- London
- Callummilburn Ltd
Callummilburn Ltd
- Company number
- 15475785
- Incorporated
- 9 Feb 20242 years trading
- Registered office
- 53 Grandison Road, London, SW11 6LS
- Nature of business
- Other construction installation
Callummilburn Ltd is a 2-year-old private limited company registered in London, company number 15475785, one of 2,278 installation companies (insulation, lifts, shutters and similar) in London. Its next accounts are due at Companies House on 30 November 2027, and the CT600 for the period to 28 February 2027 is due at HMRC on 28 February 2028.
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 Callummilburn LtdOr 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 £5,039 (+49.6%) on the year before, to £15K.
- Current assets of £29K against £13K owed within a year: 2.2 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 2 years, 2025 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2026 | £15K | £29K | £13K | 1 | |
| 28 Feb 2025 | £10K | £18K | £7,854 | 1 |
Where Callummilburn Ltd is registered
The registered office is in London (SW11), in the Wandsworth local authority area, London. Show SW11 6LS on a map.
Other trade companies in SW11
- Clean Easy Commercial LimitedCleaning companies
- Sarq LtdBuilders
- Reseq & Rozy LtdMechanics and garages
- Traditional Restoration LimitedSpecialist contractors
- Plumbing Waters LtdPlumbers and heating engineers
- F&F General Builder LtdInstallers
- Octavias Property Investments LtdProperty developers
- Gmca Cleans LtdCleaning companies
What happens if Callummilburn 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 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2027 to 31 Dec 2027 | £150 |
| 1 to 3 months late | 1 Jan 2028 to 29 Feb 2028 | £375 |
| 3 to 6 months late | 1 Mar 2028 to 31 May 2028 | £750 |
| More than 6 months late | From 1 Jun 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Feb 2028 | £200 |
| 3 months late | 28 May 2028 | another £200 |
| 6 months late | 28 Aug 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 2029 | 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
- 15475785
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 February 2024 (2 years ago)
- Registered office
- 53 Grandison Road, London, SW11 6LS
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 29 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2026
- Last confirmation statement
- 8 February 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in London
Other active installation companies (insulation, lifts, shutters and similar) registered in London.
- Cambourne Estates Ltd2018
- Camsec Ltd2025
- Canary Fire Ltd2023
- Canary Fire Stopping Ltd2019
- Canghai Construction Ltd2025
- Canvas Interiors Ltd2023
- Capital Hut Ltd2020
- Capital Insync Limited2024
All installation companies (insulation, lifts, shutters and similar) in London · All trades in London · Installers across the UK
Frequently asked questions
When are Callummilburn Ltd's accounts due?
Callummilburn Ltd's next accounts are due at Companies House by 30 November 2027 (in 414 days), covering the period to 28 February 2027.
When is Callummilburn Ltd's CT600 due?
The CT600 for the period to 28 February 2027 is due at HMRC by 28 February 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2027.
Is Callummilburn Ltd still trading?
Callummilburn 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 Callummilburn Ltd do?
Callummilburn Ltd is registered under Other construction installation (SIC 43290).
How old is Callummilburn Ltd?
Callummilburn Ltd was incorporated on 9 February 2024, 2 years ago.
What is the penalty if Callummilburn 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 Callummilburn 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.