- Companies
- Groundworks and demolition
- Towcester
- Ironrock Civils & Groundworks Ltd
Ironrock Civils & Groundworks Ltd
- Company number
- 17099569
- Incorporated
- 18 Mar 2026
- Registered office
- Henge Barn Pury Hill Business Park, Alderton Road, Towcester, Northamptonshire, NN12 7LS
- Nature of business
- Site preparation
Ironrock Civils & Groundworks Ltd is a newly incorporated private limited company registered in Towcester, company number 17099569, one of the UK's groundworks and demolition companies. Its next accounts are due at Companies House on 18 December 2027, and its first CT600 is due at HMRC on 17 March 2028.
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 Ironrock Civils & Groundworks Ltd is registered
The registered office is in Towcester (NN12), in the West Northamptonshire local authority area, East Midlands. Show NN12 7LS on a map.
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Shared registered office
77 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Ironrock Civils & Groundworks 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 18 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 19 Dec 2027 to 18 Jan 2028 | £150 |
| 1 to 3 months late | 19 Jan 2028 to 18 Mar 2028 | £375 |
| 3 to 6 months late | 19 Mar 2028 to 18 Jun 2028 | £750 |
| More than 6 months late | From 19 Jun 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 17099569
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 March 2026
- Registered office
- Henge Barn Pury Hill Business Park, Alderton Road, Towcester, Northamptonshire, NN12 7LS
- Nature of business
- Site preparation (SIC 43120)
- Year end
- 31 March (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for groundworks and demolition companies
Groundworks and demolition companies tend to own heavy plant, so capital allowances and hire purchase liabilities show up in both the accounts and the CT600.
Similar companies in Towcester
Other active groundworks and demolition companies registered in Towcester.
All groundworks and demolition companies in Towcester · All trades in Towcester · Groundworks and demolition across the UK
Frequently asked questions
When are Ironrock Civils & Groundworks Ltd's accounts due?
Ironrock Civils & Groundworks Ltd's next accounts are due at Companies House by 18 December 2027 (in 431 days), covering the period to 31 March 2027.
When is Ironrock Civils & Groundworks 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 17 March 2027, due by 17 March 2028, and one for the period to 31 March 2027, due by 31 March 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Ironrock Civils & Groundworks Ltd still trading?
Ironrock Civils & Groundworks 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 Ironrock Civils & Groundworks Ltd do?
Ironrock Civils & Groundworks Ltd is registered under Site preparation (SIC 43120).
How old is Ironrock Civils & Groundworks Ltd?
Ironrock Civils & Groundworks Ltd was incorporated on 18 March 2026, less than a year ago.
What is the penalty if Ironrock Civils & Groundworks 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 Ironrock Civils & Groundworks 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.