- Companies
- Civil engineering
- Northolt
- Three Doons Groundworks Ltd
Three Doons Groundworks Ltd
- Company number
- 14559628
- Incorporated
- 28 Dec 20223 years trading
- Registered office
- 55 Castle Road, Northolt, UB5 4SE
- Nature of business
- Construction of other civil engineering projects n.e.c.
Three Doons Groundworks Ltd is a 3-year-old private limited company registered in Northolt, company number 14559628, one of 9 civil engineering contractors in Northolt. Its next accounts are due at Companies House on 5 January 2028, and the CT600 for the period to 5 April 2027 is due at HMRC on 5 April 2028.
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 £8,187 (-25.2%) on the year before, to £24K.
- 1 employee on average during the year.
- Balance sheets on record for 3 years, 2024 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 5 Apr 2026 | £24K | £45K | £0 | 1 | |
| 5 Apr 2025 | £33K | £55K | £23K | 1 | |
| 5 Apr 2024 | £21K | £40K | £20K | 1 |
Where Three Doons Groundworks Ltd is registered
The registered office is in Northolt (UB5), in the Ealing local authority area, London. Show UB5 4SE on a map.
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What happens if Three Doons 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 5 January 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 6 Jan 2028 to 5 Feb 2028 | £150 |
| 1 to 3 months late | 6 Feb 2028 to 5 Apr 2028 | £375 |
| 3 to 6 months late | 6 Apr 2028 to 5 Jul 2028 | £750 |
| More than 6 months late | From 6 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 6 Apr 2028 | £200 |
| 3 months late | 5 Jul 2028 | another £200 |
| 6 months late | 5 Oct 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 5 Apr 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
- 14559628
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 December 2022 (3 years ago)
- Registered office
- 55 Castle Road, Northolt, UB5 4SE
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 5 April (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 5 April 2026
- Last confirmation statement
- 14 December 2025
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 Northolt
Other active civil engineering contractors registered in Northolt.
- Yonik Ivr Ltd2025
- Oluayeni Ltd2013
- Piron Construction Ltd2023
- Primebuild Builders Ltd2025
- RB Cables Limited2019
- S.T. Telecom Limited2009
- Sewa Enterprises Limited2013
- T Slattery Utilities Ltd2023
All civil engineering contractors in Northolt · All trades in Northolt · Civil engineering across the UK
Frequently asked questions
When are Three Doons Groundworks Ltd's accounts due?
Three Doons Groundworks Ltd's next accounts are due at Companies House by 5 January 2028 (in 449 days), covering the period to 5 April 2027.
When is Three Doons Groundworks Ltd's CT600 due?
The CT600 for the period to 5 April 2027 is due at HMRC by 5 April 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 6 January 2028.
Is Three Doons Groundworks Ltd still trading?
Three Doons 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 Three Doons Groundworks Ltd do?
Three Doons Groundworks Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Three Doons Groundworks Ltd?
Three Doons Groundworks Ltd was incorporated on 28 December 2022, 3 years ago.
What is the penalty if Three Doons 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 Three Doons 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.