- Companies
- Civil engineering
- Spalding
- Rock Net Plant Ltd
Rock Net Plant Ltd
- Company number
- 07517472
- Incorporated
- 4 Feb 201115 years trading
- Registered office
- 32 the Crescent, Spalding, Lincolnshire, PE11 1AF
- Nature of business
- Construction of water projects; Sea and coastal freight water transport
Rock Net Plant Ltd is a 15-year-old private limited company registered in Spalding, company number 07517472, one of 36 civil engineering contractors in Spalding. 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 unchanged on the year before, at £100.
- Net assets rose in 1 of 9 year-on-year comparisons on record.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2025 | £100 | £100 | 1 | ||
| 28 Feb 2024 | £100 | £100 | 1 | ||
| 28 Feb 2023 | £100 | £100 | 1 | ||
| 28 Feb 2022 | £100 | £100 | 1 | ||
| 28 Feb 2021 | £100 | £100 | 1 | ||
| 29 Feb 2020 | £100 | £100 | 1 | ||
| 28 Feb 2019 | £100 | £100 | 1 | ||
| 28 Feb 2018 | £1 | £1 | |||
| 28 Feb 2017 | £1 | £1 | |||
| 28 Feb 2016 | £1 | £1 |
Where Rock Net Plant Ltd is registered
The registered office is in Spalding (PE11), in the South Holland local authority area, East Midlands. Show PE11 1AF on a map.
Other trade companies in PE11
- Kingfisher Property Maintenance South LtdSpecialist contractors
- Winter Shield Park Home LimitedFinishing trades
- Arkto Climate Systems LtdPlumbers and heating engineers
- Safeguard Roofing(Barnsley) LtdRoofers
- Leicester Roofing Contractors LtdRoofers
- Fairfit Kitchens LtdJoiners and carpenters
- Affordable Roofing Property Maintenance LtdRoofers
- Stormline Roofing LtdRoofers
Shared registered office
414 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 Rock Net Plant 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
- 07517472
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 February 2011 (15 years ago)
- Registered office
- 32 the Crescent, Spalding, Lincolnshire, PE11 1AF
- Nature of business
- Construction of water projects (SIC 42910)
Sea and coastal freight water transport (SIC 50200) - Year end
- 29 February (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 5 September 2025
- Previous names
- Sonic Plant Ltd (until 13 Feb 2026)
Seatrek Ltd (until 28 Apr 2015)
The Ship Inn (Pinchbeck) Limited (until 9 Feb 2012)
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Spalding
Other active civil engineering contractors registered in Spalding.
- Sea Trek Ltd2011
- Signature Paving Landscaping Limited2026
- SSJ Welding Ltd2023
- Stephens Communications Ltd2023
- Tignel Solutions Ltd2025
- Weathertek Limited2019
- Allied Builders UK Limited2007
- Apj Electrical Limited2021
All civil engineering contractors in Spalding · All trades in Spalding · Civil engineering across the UK
Frequently asked questions
When are Rock Net Plant Ltd's accounts due?
Rock Net Plant Ltd's next accounts are due at Companies House by 30 November 2026 (in 48 days), covering the period to 28 February 2026.
When is Rock Net Plant 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 Rock Net Plant Ltd still trading?
Rock Net Plant Ltd is listed as active on the Companies House register (checked 13 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 Rock Net Plant Ltd do?
Rock Net Plant Ltd is registered under Construction of water projects (SIC 42910); Sea and coastal freight water transport (SIC 50200).
How old is Rock Net Plant Ltd?
Rock Net Plant Ltd was incorporated on 4 February 2011, 15 years ago.
What is the penalty if Rock Net Plant 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 Rock Net Plant Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.