- Companies
- Joiners and carpenters
- London
- Diamond General Builders Ltd
Diamond General Builders Ltd
- Company number
- 11834833
- Incorporated
- 19 Feb 20197 years trading
- Registered office
- 48 Berkeley Road, London, NW9 9DG
- Nature of business
- Joinery installation
Diamond General Builders Ltd is a 7-year-old private limited company registered in London, company number 11834833, one of 692 joinery companies in London. 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 down £516 (-120.3%) on the year before, to -£87.
- Net assets rose in 1 of 5 year-on-year comparisons on record.
- 2 employees on average during the year.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2025 | -£87 | £5,714 | £6,682 | 2 | |
| 28 Feb 2024 | £429 | £6,316 | £13K | £17K | 2 |
| 28 Feb 2023 | £2,620 | £16K | £28K | £1,201 | 2 |
| 28 Feb 2022 | £6,427 | £11K | £63K | £20K | 2 |
| 28 Feb 2021 | £9,429 | £41K | £92K | £40K | 2 |
| 28 Feb 2020 | £5,313 | £10K | £20K | £21K | 3 |
Where Diamond General Builders Ltd is registered
The registered office is in London (NW9), in the Brent local authority area, London. Show NW9 9DG on a map.
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What happens if Diamond General Builders 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
- 11834833
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 February 2019 (7 years ago)
- Registered office
- 48 Berkeley Road, London, NW9 9DG
- Nature of business
- Joinery installation (SIC 43320)
- Year end
- 28 February (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 15 October 2025
Filing notes for joinery companies
Joinery companies can carry stock and work in progress at the year end, especially bespoke workshop work, and that figure moves the profit for the year.
Similar companies in London
Other active joinery companies registered in London.
- Dils Ltd2016
- Dino Frame&Glass Installation Ltd2026
- DL1 Doors Ltd2026
- DMB Flooring and Interiors Limited2018
- DMC Fitters Ltd2024
- DNG Kitchens Limited2022
- Doli Contracts Ltd2026
- Domi Construction Ltd2020
All joinery companies in London · All trades in London · Joiners and carpenters across the UK
Frequently asked questions
When are Diamond General Builders Ltd's accounts due?
Diamond General Builders Ltd's next accounts are due at Companies House by 30 November 2026 (in 49 days), covering the period to 28 February 2026.
When is Diamond General Builders 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 Diamond General Builders Ltd still trading?
Diamond General Builders 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 Diamond General Builders Ltd do?
Diamond General Builders Ltd is registered under Joinery installation (SIC 43320).
How old is Diamond General Builders Ltd?
Diamond General Builders Ltd was incorporated on 19 February 2019, 7 years ago.
What is the penalty if Diamond General Builders 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 Diamond General Builders 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.