- Company number
- 16838321
- Incorporated
- 6 Nov 2025
- Registered office
- 158 Roundwood Road, Ipswich, IP4 4LY
- Nature of business
- Construction of domestic buildings
Diamond Groundwork Ltd is a newly incorporated private limited company registered in Ipswich, company number 16838321, one of 244 building contractors in Ipswich. Its next accounts are due at Companies House on 6 August 2027, and its first CT600 is due at HMRC on 5 November 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.
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Where Diamond Groundwork Ltd is registered
The registered office is in Ipswich (IP4), in the Ipswich local authority area, East of England. Show IP4 4LY on a map.
Other trade companies in IP4
- Ukdk Clearances LtdGroundworks and demolition
- Allinall Ventures LtdMotor traders
- Laurselle Holdings LtdProperty developers
- Ipswich Autos LtdMotor traders
- D&D Driver LtdGroundworks and demolition
- T.E.D Electrical Contracting LtdElectricians
- L A East Construction LtdBuilders
- Phelps Electrical LtdElectricians
What happens if Diamond Groundwork 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 6 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 7 Aug 2027 to 6 Sep 2027 | £150 |
| 1 to 3 months late | 7 Sep 2027 to 6 Nov 2027 | £375 |
| 3 to 6 months late | 7 Nov 2027 to 6 Feb 2028 | £750 |
| More than 6 months late | From 7 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 16838321
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 November 2025
- Registered office
- 158 Roundwood Road, Ipswich, IP4 4LY
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 30 November (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Ipswich
Other active building contractors registered in Ipswich.
- DK Construction Group Ltd2026
- DNL Construction RML Limited2026
- Dreamscape Development Ltd2024
- DT Home Improvements Ltd2021
- DZ Construction Ltd2021
- E&I Drywall Ltd2020
- E. L. Construction Limited1982
- E.L Walker Construction Ltd2024
All building contractors in Ipswich · All trades in Ipswich · Builders across the UK
Frequently asked questions
When are Diamond Groundwork Ltd's accounts due?
Diamond Groundwork Ltd's next accounts are due at Companies House by 6 August 2027 (in 298 days), covering the period to 30 November 2026.
When is Diamond Groundwork 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 5 November 2026, due by 5 November 2027, and one for the period to 30 November 2026, due by 30 November 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Diamond Groundwork Ltd still trading?
Diamond Groundwork 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 Groundwork Ltd do?
Diamond Groundwork Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Diamond Groundwork Ltd?
Diamond Groundwork Ltd was incorporated on 6 November 2025, less than a year ago.
What is the penalty if Diamond Groundwork 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 Groundwork 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.