- Companies
- Painters and decorators
- Cardiff
- Diamond Dec Ltd
Diamond Dec Ltd
- Company number
- 16684214
- Incorporated
- 1 Sep 20251 year trading
- Registered office
- PO Box 4385, 16684214 - Companies House Default Address, Cardiff, CF14 8LH
- Nature of business
- Painting
Diamond Dec Ltd is a 1-year-old private limited company registered in Cardiff, company number 16684214, one of 31 painting and decorating companies in Cardiff. Its next accounts are due at Companies House on 1 June 2027, and its first CT600 is due at HMRC on 31 August 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
Is this your company?
File the first 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 Diamond Dec 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.
Where Diamond Dec Ltd is registered
The registered office is in Cardiff (CF14), in the Caerphilly local authority area, Wales. Show CF14 8LH on a map.
Other trade companies in CF14
- Velren Group LtdProperty developers
- Premierroofcare LtdRoofers
- JLG Groundworks LtdCleaning companies
- Tidyvibz LtdCleaning companies
- Ayyappa MTD LtdBuilders
- KM Phoenix Pond, Garden & General Maintenance LtdLandscapers and gardeners
- Eco Green Property Service LtdFinishing trades
- S and J Accident Repairs LtdPainters and decorators
What happens if Diamond Dec 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 1 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 2 Jun 2027 to 1 Jul 2027 | £150 |
| 1 to 3 months late | 2 Jul 2027 to 1 Sep 2027 | £375 |
| 3 to 6 months late | 2 Sep 2027 to 1 Dec 2027 | £750 |
| More than 6 months late | From 2 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 16684214
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 September 2025 (1 year ago)
- Registered office
- PO Box 4385, 16684214 - Companies House Default Address, Cardiff, CF14 8LH
- Nature of business
- Painting (SIC 43341)
- Year end
- 30 September (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for painting and decorating companies
Decorating companies are usually labour-based micro-entities working for homeowners and contractors, some of it under CIS.
Similar companies in Cardiff
Other active painting and decorating companies registered in Cardiff.
- Dreamcoats Painting Ltd2025
- Elite Powder Coating and Blasting Ltd2025
- Facade Care U.K. Limited2020
- Gilps Construction Ltd2026
- Haines Painting & Decorating Limited2005
- JC Painting Limited2025
- LT Decorating Limited2023
- M&M Painting Services Ltd2025
All painting and decorating companies in Cardiff · All trades in Cardiff · Painters and decorators across the UK
Frequently asked questions
When are Diamond Dec Ltd's accounts due?
Diamond Dec Ltd's next accounts are due at Companies House by 1 June 2027 (in 232 days), covering the period to 30 September 2026.
When is Diamond Dec Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 31 August 2026, due by 31 August 2027, and one for the period to 30 September 2026, due by 30 September 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Diamond Dec Ltd still trading?
Diamond Dec Ltd is listed as active on the Companies House register (checked 12 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 Dec Ltd do?
Diamond Dec Ltd is registered under Painting (SIC 43341).
How old is Diamond Dec Ltd?
Diamond Dec Ltd was incorporated on 1 September 2025, 1 year ago.
What is the penalty if Diamond Dec 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 Dec Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.