- Companies
- Electricians
- Waterlooville
- SJ Power Limited
SJ Power Limited
- Company number
- 09368162
- Incorporated
- 29 Dec 201411 years trading
- Registered office
- Unit 34D Aston Road Industrial Estate, Aston Road, Waterlooville, Hampshire, PO7 7XQ
- Nature of business
- Electrical installation; Other engineering activities
SJ Power Limited is a 11-year-old private limited company registered in Waterlooville, company number 09368162, one of 125 electrical contractors in Waterlooville. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 up £117K (+214.3%) on the year before, to £172K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £625K against £457K owed within a year: 1.4 times cover.
- 5 employees on average, down from 6 the year before.
- 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 |
|---|---|---|---|---|---|
| 31 Dec 2025 | £172K | £222K | £625K | £457K | 5 |
| 31 Dec 2024 | £55K | £121K | £265K | £221K | 6 |
| 31 Dec 2023 | £96K | £61K | £286K | £192K | 6 |
| 31 Dec 2022 | £23K | £150K | £192K | £141K | 4 |
| 31 Dec 2021 | £22K | £48K | £134K | £68K | 4 |
| 31 Dec 2020 | £43K | £140K | £153K | £70K | 4 |
| 31 Dec 2019 | £85K | £85K | £135K | £65K | 4 |
| 31 Dec 2018 | £85K | £113K | £216K | £160K | 3 |
| 31 Dec 2017 | £8,164 | £56K | £35K | ||
| 31 Dec 2016 | £5,452 | £12K | £6,912 |
Public contracts won
SJ Power Limited has one public sector contract award on record; the ones with their own published value total £321K (2025). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| NHS Property Services Limited | Replacing Generator sets | £321K | 29 Oct 2025 |
Where SJ Power Limited is registered
The registered office is in Waterlooville (PO7), in the Havant local authority area, South East. Show PO7 7XQ on a map.
Other trade companies in PO7
- Coast to Coast Flooring LtdFloor and wall tilers
- Fortress Roofing Services LtdInstallers
- Redlands Roofing LtdInstallers
- WCP Plumbing & Heating LtdPlumbers and heating engineers
- Sparmor Developments LtdProperty developers
- Titan Home Improvements LtdProperty developers
- Accord Housing LimitedProperty developers
- JM Property & Stoves Services LimitedBuilders
What happens if SJ Power 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 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 09368162
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 December 2014 (11 years ago)
- Registered office
- Unit 34D Aston Road Industrial Estate, Aston Road, Waterlooville, Hampshire, PO7 7XQ
- Nature of business
- Electrical installation (SIC 43210)
Other engineering activities (SIC 71129) - Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 21 December 2025
- Charges (mortgages)
- 1 outstanding of 1 registered
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Waterlooville
Other active electrical contractors registered in Waterlooville.
- Skyforge Electrical Solutions Ltd2017
- SL Electrical Solutions Limited2022
- SLT Heating Ltd2024
- Smart Safe Electrical Limited2022
- Smartlec Electrical Ltd2015
- Smokeserv Ltd2022
- Solar Sunrise Limited2025
- South Hants Installations Limited2001
All electrical contractors in Waterlooville · All trades in Waterlooville · Electricians across the UK
Frequently asked questions
When are SJ Power Limited's accounts due?
SJ Power Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is SJ Power Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is SJ Power Limited still trading?
SJ Power 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 SJ Power Limited do?
SJ Power Limited is registered under Electrical installation (SIC 43210); Other engineering activities (SIC 71129).
How old is SJ Power Limited?
SJ Power Limited was incorporated on 29 December 2014, 11 years ago.
Has SJ Power Limited won public sector contracts?
Yes. SJ Power Limited has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £321K), most recently from NHS Property Services Limited.
What is the penalty if SJ Power 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 SJ Power 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.