- Companies
- Installers
- Newport
- Sub-Terra Works (Plant) Limited
Sub-Terra Works (Plant) Limited
- Company number
- 12919043
- Incorporated
- 1 Oct 20206 years trading
- Registered office
- 11A Corelli Street, Newport, South Wales, NP19 7AR
- Nature of business
- Other construction installation
Sub-Terra Works (Plant) Limited is a 6-year-old private limited company registered in Newport, company number 12919043, one of 74 installation companies (insulation, lifts, shutters and similar) in Newport. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 £509 (-11%) on the year before, to -£5,135.
- Net assets rose in 0 of 4 year-on-year comparisons on record.
- Current assets of £659 against £5,531 owed within a year: 0.1 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | -£5,135 | £659 | £5,531 | 2 | |
| 31 Oct 2024 | -£4,626 | £743 | £5,062 | 2 | |
| 31 Oct 2023 | -£4,055 | £37K | £41K | 2 | |
| 31 Oct 2022 | -£437 | £2,972 | £3,159 | 0 | |
| 31 Oct 2021 | £100 |
Where Sub-Terra Works (Plant) Limited is registered
The registered office is in Newport (NP19), in the Newport local authority area, Wales. Show NP19 7AR on a map.
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Also registered at this address
2 other companies use the same registered office as Sub-Terra Works (Plant) Limited.
- Agg-Fix Maintenance LimitedMachinery repair and installation
- N J Fixings LtdBuilders
What happens if Sub-Terra Works (Plant) Limited 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 31 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 12919043
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 1 October 2020 (6 years ago)
- Registered office
- 11A Corelli Street, Newport, South Wales, NP19 7AR
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 30 September 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Newport
Other active installation companies (insulation, lifts, shutters and similar) registered in Newport.
- Surge Electrical Ltd2019
- Swift Kitchen Doors Ltd2025
- Swift UPVC West Ltd2025
- T.Kavanagh Rigging Solutions Ltd2025
- The Monmouthshire Window Company Ltd2023
- Thermal-Tek Solutions Limited2014
- Window & Door Doc Limited2023
- 360 Design Consultants Ltd2019
All installation companies (insulation, lifts, shutters and similar) in Newport · All trades in Newport · Installers across the UK
Frequently asked questions
When are Sub-Terra Works (Plant) Limited's accounts due?
Sub-Terra Works (Plant) Limited's next accounts are due at Companies House by 31 July 2027 (in 291 days), covering the period to 31 October 2026.
When is Sub-Terra Works (Plant) Limited's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Sub-Terra Works (Plant) Limited still trading?
Sub-Terra Works (Plant) Limited 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 Sub-Terra Works (Plant) Limited do?
Sub-Terra Works (Plant) Limited is registered under Other construction installation (SIC 43290).
How old is Sub-Terra Works (Plant) Limited?
Sub-Terra Works (Plant) Limited was incorporated on 1 October 2020, 6 years ago.
What is the penalty if Sub-Terra Works (Plant) Limited 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 Sub-Terra Works (Plant) Limited 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.