- Companies
- Specialist contractors
- Londonderry
- O'Neill Proweld Limited
O'Neill Proweld Limited
- Company number
- NI631537
- Incorporated
- 27 May 201511 years trading
- Registered office
- C/O Brian McDaid & Associates, 35 Clarendon Street, Londonderry, BT48 7ER
- Nature of business
- Other specialised construction activities n.e.c.
O'Neill Proweld Limited is a 11-year-old private limited company registered in Londonderry, company number NI631537, one of 48 specialist construction companies in Londonderry. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £625 (-96%) on the year before, to £26.
- Net assets rose in 1 of 3 year-on-year comparisons on record.
- Current assets of £7,410 against £8,041 owed within a year: 0.9 times cover.
- Balance sheets on record for 4 years, 2016 to 2019.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2019 | £26 | £7,410 | £8,041 | ||
| 31 Mar 2018 | £651 | £11K | |||
| 31 Mar 2017 | £2,435 | £25K | £22K | ||
| 31 Mar 2016 | £661 | £13K | £18K | £17K |
Who runs and owns O'Neill Proweld Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| M*** O*** | Director | May 2015 |
| M*** O*** | Secretary | May 2015 |
Person with significant control
Where O'Neill Proweld Limited is registered
The registered office is in Londonderry (BT48), in the Derry City and Strabane local authority area, Northern Ireland. Show BT48 7ER on a map.
Other trade companies in BT48
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- Ked Brick & Blockwork LtdBuilders
- Zapcars LtdMotor traders
- TMC Electrics LtdElectricians
- Northern Diesels LtdMotor traders
- Coyle Reclamation & Salvage LtdSpecialist contractors
- George MCG Mechanical LtdElectricians
- KK Electrical Solutions Ireland LimitedElectricians
What happens if O'Neill Proweld 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- NI631537
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 27 May 2015 (11 years ago)
- Registered office
- C/O Brian McDaid & Associates, 35 Clarendon Street, Londonderry, BT48 7ER
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 27 May 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Londonderry
Other active specialist construction companies registered in Londonderry.
- Omega Mechanical Services Limited1992
- Project Ceilings Ltd2019
- RLB Property Management Ltd2015
- Ruvigny (Northern Ireland) Ltd2001
- SJK Utility Services Ltd2019
- Skilled Contracts Ltd2018
- SMC Civils Ltd2021
- Suredrains Ltd2025
All specialist construction companies in Londonderry · All trades in Londonderry · Specialist contractors across the UK
Frequently asked questions
When are O'Neill Proweld Limited's accounts due?
O'Neill Proweld Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is O'Neill Proweld Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is O'Neill Proweld Limited still trading?
O'Neill Proweld 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 O'Neill Proweld Limited do?
O'Neill Proweld Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is O'Neill Proweld Limited?
O'Neill Proweld Limited was incorporated on 27 May 2015, 11 years ago.
Who runs O'Neill Proweld Limited?
O'Neill Proweld Limited has 1 active director, the longest-serving appointed in May 2015. Their names and service addresses are on the Companies House register.
Who owns O'Neill Proweld Limited?
One person or company has significant control of O'Neill Proweld Limited: an individual (owns 75% or more of the shares).
What is the penalty if O'Neill Proweld 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 O'Neill Proweld 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.