- Companies
- Civil engineering
- Bangor
- Du Construction Limited
Du Construction Limited
- Company number
- 03182086
- Incorporated
- 3 Apr 199630 years trading
- Registered office
- Glaslyn Ffordd Y Parc, Parc Menai, Bangor, Gwynedd, LL57 4FE
- Nature of business
- Construction of other civil engineering projects n.e.c.
Du Construction Limited is a 30-year-old private limited company registered in Bangor, company number 03182086, one of 17 civil engineering contractors in Bangor. Its next accounts are due at Companies House on 31 January 2028, and the CT600 for the period to 30 April 2027 is due at HMRC on 30 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 £792K (-20.1%) on the year before, to £3.2M.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £3.6M against £977K owed within a year: 3.6 times cover.
- 40 employees on average, down from 41 the year before.
- 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 |
|---|---|---|---|---|---|
| 30 Apr 2026 | £3.2M | £590K | £3.6M | £977K | 40 |
| 30 Apr 2025 | £3.9M | £1.6M | £4.8M | £1.3M | 41 |
| 30 Apr 2024 | £2.8M | £1.4M | £3.7M | £1.3M | 36 |
| 30 Apr 2023 | £2M | £984K | £2.6M | £756K | 35 |
| 30 Apr 2022 | £2M | £715K | £2.4M | £802K | 38 |
| 30 Apr 2021 | £2M | £1.6M | £3M | £1.2M | 49 |
| 30 Apr 2020 | £1.3M | £439K | £1.9M | £758K | 58 |
| 30 Apr 2019 | £1.3M | £8 | £1.7M | £604K | 57 |
| 30 Apr 2018 | £1.4M | £78K | £2M | £853K | 60 |
| 30 Apr 2017 | £1.4M | £157K | £1.6M | £544K | 56 |
Public contracts won
Du Construction Limited has 2 public sector contract awards on record, from 2020 to 2022. Source: Contracts Finder and Find a Tender award notices. For all of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. These were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Adra (Tai) Cyf1 award
- LHC Procurement Group for the Welsh Procurement Alliance (WPA)1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Adra (Tai) Cyf | Development of 17 dwellings at Cae'r Glyn, Caernarfon | Ceiling, not shown | 7 Jan 2022 |
| LHC Procurement Group for the Welsh Procurement Alliance (WPA) | North and Mid-Wales Residential Construction Framework | Ceiling, not shown | 27 Mar 2020 |
Where Du Construction Limited is registered
The registered office is in Bangor (LL57), in the Gwynedd local authority area, Wales. Show LL57 4FE on a map.
Other trade companies in LL57
- Purple Plumbers LimitedPlumbers and heating engineers
- E.R.A Humphreys LimitedCivil engineering
- Morris&Owens LimitedPlasterers
- North Coast Carpentry and Construction LimitedJoiners and carpenters
- P M Williams & Son LtdBuilders
- K Gorilla Cars LtdMotor traders
- Gwynedd Scaffolding LimitedScaffolders
- J&G Building and Assembling LtdBuilders
Also registered at this address
17 other companies use the same registered office as Du Construction Limited.
- Above the Brine LtdMachinery repair and installation
- Barton & Nichols LimitedMechanics and garages
- Connect Electrical Engineering LtdElectricians
- Ecoheat Renewable Energy LtdPlumbers and heating engineers
- Eladon LimitedCivil engineering
- Grosvenor Garage (Menai Bridge) LtdMechanics and garages
- J Alwyn Roberts Plumbing & Heating CyfPlumbers and heating engineers
- Kimberley Gulf LimitedCivil engineering
- MC&RD Williams Building Contractors LtdFinishing trades
- MDK Car & Commercial LimitedMechanics and garages
- Menai Construction LimitedCivil engineering
- Mon Mechanical Services LtdMechanics and garages
- Nexus Engineering (NW) LtdElectricians
- Ombler Williams LimitedJoiners and carpenters
- P M Williams & Son LtdBuilders
- Robert M Jones LtdPlasterers
- T T Roberts & Son LtdCivil engineering
What happens if Du 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 31 January 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2028 to 29 Feb 2028 | £150 |
| 1 to 3 months late | 1 Mar 2028 to 30 Apr 2028 | £375 |
| 3 to 6 months late | 1 May 2028 to 31 Jul 2028 | £750 |
| More than 6 months late | From 1 Aug 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2028 | £200 |
| 3 months late | 30 Jul 2028 | another £200 |
| 6 months late | 30 Oct 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 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
- 03182086
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 April 1996 (30 years ago)
- Registered office
- Glaslyn Ffordd Y Parc, Parc Menai, Bangor, Gwynedd, LL57 4FE
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 April 2026
- Last confirmation statement
- 3 April 2026
- Charges (mortgages)
- 7 outstanding of 9 registered
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 Bangor
Other active civil engineering contractors registered in Bangor.
- E.R.A Humphreys Limited2026
- Eladon Limited1990
- G & C Roberts & Son (N.Wales) Limited2006
- Kimberley Gulf Limited1989
- M T Sykes (Contracting) Limited2007
- Marrac Design Ltd2019
- McCollum Engineering Ltd2021
- Menai Construction Limited2006
All civil engineering contractors in Bangor · All trades in Bangor · Civil engineering across the UK
Frequently asked questions
When are Du Construction Limited's accounts due?
Du Construction Limited's next accounts are due at Companies House by 31 January 2028 (in 475 days), covering the period to 30 April 2027.
When is Du Construction Limited's CT600 due?
The CT600 for the period to 30 April 2027 is due at HMRC by 30 April 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2028.
Is Du Construction Limited still trading?
Du 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 Du Construction Limited do?
Du Construction Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Du Construction Limited?
Du Construction Limited was incorporated on 3 April 1996, 30 years ago.
Has Du Construction Limited won public sector contracts?
Yes. Du Construction Limited has 2 contract awards from public bodies on Contracts Finder and Find a Tender, most recently from Adra (Tai) Cyf.
What is the penalty if Du 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 Du 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.