- Companies
- Civil engineering
- Belfast
- Rockmount Utilities Limited
Rockmount Utilities Limited
- Company number
- NI623928
- Incorporated
- 7 Apr 201412 years trading
- Registered office
- 37 Rocky Road, Gilnahirk, Belfast, BT5 7TA
- Nature of business
- Construction of utility projects for fluids
Rockmount Utilities Limited is a 12-year-old private limited company registered in Belfast, company number NI623928, one of 67 civil engineering contractors in Belfast. Its next accounts are due at Companies House on 31 January 2027, and the CT600 for the period to 30 April 2026 is due at HMRC on 30 April 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 £108K (-14.8%) on the year before, to £622K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £1.1M against £777K owed within a year: 1.4 times cover.
- 5 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Apr 2025 | £622K | £899K | £1.1M | £777K | 5 |
| 30 Apr 2024 | £730K | £806K | £1.2M | £697K | 5 |
| 30 Apr 2023 | £2M | £2M | £2.4M | £674K | 5 |
| 30 Apr 2022 | £1.3M | £1.3M | £1.5M | £427K | 5 |
| 30 Apr 2021 | £938K | £989K | £1.3M | £480K | 4 |
| 30 Apr 2020 | £573K | £535K | £704K | £200K | 4 |
| 30 Apr 2019 | £430K | £237K | £544K | £153K | |
| 30 Apr 2018 | £295K | £189K | £570K | £276K | |
| 30 Apr 2017 | £182K | £64K | £515K | £333K | |
| 30 Apr 2016 | £81K | £4,981 | £352K | £272K |
Who runs and owns Rockmount Utilities Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (4)
| Name | Role | Appointed |
|---|---|---|
| P*** E*** | Director | Apr 2014 |
| A*** M*** | Director | Apr 2014 |
| P*** M*** | Director | Apr 2014 |
| P*** T*** | Director | May 2024 |
People with significant control (3)
Where Rockmount Utilities Limited is registered
The registered office is in Belfast (BT5), in the Lisburn and Castlereagh local authority area, Northern Ireland. Show BT5 7TA on a map.
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What happens if Rockmount Utilities 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 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Feb 2027 to 28 Feb 2027 | £150 |
| 1 to 3 months late | 1 Mar 2027 to 30 Apr 2027 | £375 |
| 3 to 6 months late | 1 May 2027 to 31 Jul 2027 | £750 |
| More than 6 months late | From 1 Aug 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 May 2027 | £200 |
| 3 months late | 30 Jul 2027 | another £200 |
| 6 months late | 30 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Apr 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
- NI623928
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 April 2014 (12 years ago)
- Registered office
- 37 Rocky Road, Gilnahirk, Belfast, BT5 7TA
- Nature of business
- Construction of utility projects for fluids (SIC 42210)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 29 July 2026
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 Belfast
Other active civil engineering contractors registered in Belfast.
- Rowland Engineering Ltd2015
- SCL Electrical/Civil Engineering Ltd2025
- Semple & McKillop Limited2002
- SPP Omagh Road Bess Ltd2023
- Strategic Power Connect (NI) Ltd2022
- Strategic Propco Ltd2023
- Strni Ltd2024
- Swordlestown Farm Ltd2023
All civil engineering contractors in Belfast · All trades in Belfast · Civil engineering across the UK
Frequently asked questions
When are Rockmount Utilities Limited's accounts due?
Rockmount Utilities Limited's next accounts are due at Companies House by 31 January 2027 (in 110 days), covering the period to 30 April 2026.
When is Rockmount Utilities Limited's CT600 due?
The CT600 for the period to 30 April 2026 is due at HMRC by 30 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 February 2027.
Is Rockmount Utilities Limited still trading?
Rockmount Utilities 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 Rockmount Utilities Limited do?
Rockmount Utilities Limited is registered under Construction of utility projects for fluids (SIC 42210).
How old is Rockmount Utilities Limited?
Rockmount Utilities Limited was incorporated on 7 April 2014, 12 years ago.
Who runs Rockmount Utilities Limited?
Rockmount Utilities Limited has 4 active directors, the longest-serving appointed in Apr 2014. Their names and service addresses are on the Companies House register.
Who owns Rockmount Utilities Limited?
3 people or companies have significant control of Rockmount Utilities Limited: an individual (has significant influence or control); an individual (has significant influence or control); an individual (has significant influence or control).
What is the penalty if Rockmount Utilities 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 Rockmount Utilities 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.