- Companies
- Plumbers and heating engineers
- Larne
- B9 Energy Storage Ltd
B9 Energy Storage Ltd
- Company number
- NI605789
- Incorporated
- 18 Jan 201115 years trading
- Registered office
- 5 Willowbank Road, Millbrook Industrial Estate, Larne, Co. Antrim, BT40 2SF
- Nature of business
- Plumbing, heat and air-conditioning installation; Management consultancy activities other than financial management
B9 Energy Storage Ltd is a 15-year-old private limited company registered in Larne, company number NI605789, one of 9 plumbing and heating companies in Larne. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 £148K (-892.7%) on the year before, to -£132K.
- Current assets of £63K against £232K owed within a year: 0.3 times cover.
- 4 employees on average during the year.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | -£132K | £46K | £63K | £232K | 4 |
| 31 Oct 2024 | £17K | £134K | £244K | £524K | 4 |
Who runs and owns B9 Energy Storage Ltd
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officer
| Name | Role | Appointed |
|---|---|---|
| D*** S*** | Director | Jan 2011 |
3 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| D*** G*** | Secretary | Jan 2011 | Mar 2012 |
| M*** H*** | Director | Mar 2012 | Nov 2017 |
| J*** H*** | Director | Aug 2012 | Sep 2014 |
Person with significant control
Public contracts won
B9 Energy Storage Ltd has one public sector contract award on record (2023). 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.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| InvestNI | DfE - Invest NI - Energy and Resource Efficiency Consultancy Framework | Ceiling, not shown | 16 Oct 2023 |
Where B9 Energy Storage Ltd is registered
The registered office is in Larne (BT40), in the Mid and East Antrim local authority area, Northern Ireland. Show BT40 2SF on a map.
Other trade companies in BT40
- GW Home Improvements and Maintenance LtdBuilders
- East Coast Contracting NI LtdBuilders
- Abbey Washing Machines LtdRepair services
- CM Fit Out & Construction LtdJoiners and carpenters
- Blackwood & Crawford LtdProperty developers
- TT Tiling LtdFloor and wall tilers
- JM Servicess LtdSpecialist contractors
- NPH Heating and Plumbing LtdPlumbers and heating engineers
Also registered at this address
3 other companies use the same registered office as B9 Energy Storage Ltd.
- B9Renewables LtdInstallers
- North Coast Ribs and Outboards LtdMachinery repair and installation
- Sharon Woodside Motors LtdMotor traders
What happens if B9 Energy Storage 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 31 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- NI605789
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 January 2011 (15 years ago)
- Registered office
- 5 Willowbank Road, Millbrook Industrial Estate, Larne, Co. Antrim, BT40 2SF
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Management consultancy activities other than financial management (SIC 70229) - Year end
- 31 October (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 18 January 2026
- Previous names
- B9 Seafreight Ltd (until 22 Mar 2012)
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Larne
Other active plumbing and heating companies registered in Larne.
- Boiler Cure NI Ltd2016
- CD Mechanical Services Ltd2020
- Drainsbay Utilities Ltd2025
- M&DT Plumbing and Heating Ltd2021
- Mastercraft Plumbing Limited2026
- NPH Heating and Plumbing Ltd2026
- The Gas Man (N.I.) Ltd2019
- Uel O'Neill Ltd2013
All plumbing and heating companies in Larne · All trades in Larne · Plumbers and heating engineers across the UK
Frequently asked questions
When are B9 Energy Storage Ltd's accounts due?
B9 Energy Storage Ltd's next accounts are due at Companies House by 31 July 2027 (in 291 days), covering the period to 31 October 2026.
When is B9 Energy Storage Ltd's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is B9 Energy Storage Ltd still trading?
B9 Energy Storage 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 B9 Energy Storage Ltd do?
B9 Energy Storage Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Management consultancy activities other than financial management (SIC 70229).
How old is B9 Energy Storage Ltd?
B9 Energy Storage Ltd was incorporated on 18 January 2011, 15 years ago.
Who runs B9 Energy Storage Ltd?
B9 Energy Storage Ltd has 1 active director, the longest-serving appointed in Jan 2011. Their names and service addresses are on the Companies House register.
Who owns B9 Energy Storage Ltd?
One person or company has significant control of B9 Energy Storage Ltd: an individual (has significant influence or control).
Has B9 Energy Storage Ltd won public sector contracts?
Yes. B9 Energy Storage Ltd has one contract award from public bodies on Contracts Finder and Find a Tender, most recently from InvestNI.
What is the penalty if B9 Energy Storage 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 B9 Energy Storage 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.