- Company number
- 15151116
- Incorporated
- 20 Sep 20233 years trading
- Registered office
- 4A Church Street, Harleston, IP20 9BB
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings; Construction of utility projects for electricity and telecommunications; Other construction installation
Thegroundworksco. Ltd is a 3-year-old private limited company registered in Harleston, company number 15151116, one of 18 building contractors in Harleston. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 up £17K (+132.3%) on the year before, to £30K.
- Current assets of £33K against £16K owed within a year: 2.0 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | £30K | £33K | £16K | 1 | |
| 30 Sep 2024 | £13K | £15K | £8,316 | 1 |
Where Thegroundworksco. Ltd is registered
The registered office is in Harleston (IP20), in the South Norfolk local authority area, East of England. Show IP20 9BB on a map.
Other trade companies in IP20
- Andrew P Read LtdGroundworks and demolition
- Thermotech Plumbing & Heating LtdPlumbers and heating engineers
- Adapt & Construction LtdSpecialist contractors
- Prem E Air LtdPlumbers and heating engineers
- Sash Radiant Shine LtdCleaning companies
- DGSH Developments LtdFinishing trades
- GRB Energy LtdElectricians
- Vincent's Motor Works LtdMechanics and garages
Also registered at this address
8 other companies use the same registered office as Thegroundworksco. Ltd.
- Cooke's Maintenance LtdLandscapers and gardeners
- DGSH Developments LtdFinishing trades
- GRB Energy LtdElectricians
- Hockham & Jones Garden Services LtdLandscapers and gardeners
- Hunt Heating and Plumbing LtdPlumbers and heating engineers
- Pochin Electrical Services LtdElectricians
- Thermotech Plumbing & Heating LtdPlumbers and heating engineers
- Waveney Construction Landscapes Civils LtdSpecialist contractors
What happens if Thegroundworksco. 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 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £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
- 15151116
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 September 2023 (3 years ago)
- Registered office
- 4A Church Street, Harleston, IP20 9BB
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202)
Construction of utility projects for electricity and telecommunications (SIC 42220)
Other construction installation (SIC 43290) - Year end
- 30 September (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 19 September 2025
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 Harleston
Other active building contractors registered in Harleston.
- Tudor Constructions 2013 Ltd2013
- Agh Carpentry & Son Limited2017
- Andrew Lain Kitchens Ltd2019
- Brian Sillett Limited2007
- Ca Carpentry and Construction Limited2019
- Cambridge Windows Ltd2022
- Complete Homes Developments Ltd2016
- Concept Build Limited2009
All building contractors in Harleston · All trades in Harleston · Builders across the UK
Frequently asked questions
When are Thegroundworksco. Ltd's accounts due?
Thegroundworksco. Ltd's next accounts are due at Companies House by 30 June 2027 (in 260 days), covering the period to 30 September 2026.
When is Thegroundworksco. Ltd's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Thegroundworksco. Ltd still trading?
Thegroundworksco. 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 Thegroundworksco. Ltd do?
Thegroundworksco. Ltd is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202); Construction of utility projects for electricity and telecommunications (SIC 42220); Other construction installation (SIC 43290).
How old is Thegroundworksco. Ltd?
Thegroundworksco. Ltd was incorporated on 20 September 2023, 3 years ago.
What is the penalty if Thegroundworksco. 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 Thegroundworksco. 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.