- Companies
- Civil engineering
- Swansea
- Dag Construction Limited
Dag Construction Limited
- Company number
- 07165707
- Incorporated
- 23 Feb 201016 years trading
- Registered office
- 4 Ger Y Coed, Clydach, Swansea, SA6 5EZ
- Nature of business
- Construction of other civil engineering projects n.e.c.
Dag Construction Limited is a 16-year-old private limited company registered in Swansea, company number 07165707, one of 71 civil engineering contractors in Swansea. 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 down £8,796 (-32.8%) on the year before, to £18K.
- Net assets rose in 2 of 9 year-on-year comparisons on record.
- Current assets of £39K against £9,121 owed within a year: 4.3 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2026 | £18K | £37K | £39K | £9,121 | 2 |
| 28 Feb 2025 | £27K | £42K | £72K | £28K | 2 |
| 29 Feb 2024 | £38K | £76K | £99K | £39K | 2 |
| 28 Feb 2023 | -£5,318 | £8,978 | £32K | £6,737 | 1 |
| 28 Feb 2022 | -£3,478 | £19K | £27K | 2 | |
| 28 Feb 2021 | £1,540 | £26K | £31K | 2 | |
| 29 Feb 2020 | £1,918 | £19K | £24K | 2 | |
| 28 Feb 2019 | £779 | £20K | £28K | ||
| 28 Feb 2018 | £4,846 | £33K | £38K | ||
| 28 Feb 2017 | £6,461 | £35K | £42K |
Where Dag Construction Limited is registered
The registered office is in Swansea (SA6), in the Swansea local authority area, Wales. Show SA6 5EZ on a map.
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What happens if Dag Construction 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 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
- 07165707
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 February 2010 (16 years ago)
- Registered office
- 4 Ger Y Coed, Clydach, Swansea, SA6 5EZ
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 28 February (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 23 February 2026
- Previous names
- Dag (Civil Engineering) Limited (until 4 Feb 2015)
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 Swansea
Other active civil engineering contractors registered in Swansea.
- Dean & Thomas Limited2003
- DK Network Engineering Limited2023
- Donal Hayes & Sons (Building and Civil Engineering) Limited1993
- Donal Hayes Construction Limited2006
- Drakelow Battery Ltd2022
- Esos Services Ltd2021
- G W Richards & Sons Contractors Limited2006
- G.M. Williams Plant Limited2011
All civil engineering contractors in Swansea · All trades in Swansea · Civil engineering across the UK
Frequently asked questions
When are Dag Construction Limited's accounts due?
Dag Construction Limited's next accounts are due at Companies House by 30 November 2026 (in 48 days), covering the period to 28 February 2026.
When is Dag Construction Limited'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 Dag Construction Limited still trading?
Dag Construction 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 Dag Construction Limited do?
Dag Construction Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Dag Construction Limited?
Dag Construction Limited was incorporated on 23 February 2010, 16 years ago.
What is the penalty if Dag Construction 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 Dag Construction 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.