- Companies
- Electricians
- Northampton
- S.E.C. Electrical Limited
S.E.C. Electrical Limited
- Company number
- 00558175
- Incorporated
- 3 Dec 195570 years trading
- Registered office
- 48 ST. James Mill Road, Northampton, NN5 5JP
- Nature of business
- Electrical installation
S.E.C. Electrical Limited is a 70-year-old private limited company registered in Northampton, company number 00558175, one of 214 electrical contractors in Northampton. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 £87K (-13.3%) on the year before, to £564K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £1.7M against £1.2M owed within a year: 1.5 times cover.
- 19 employees on average, up from 16 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 |
|---|---|---|---|---|---|
| 30 Sep 2025 | £564K | £326K | £1.7M | £1.2M | 19 |
| 30 Sep 2024 | £651K | £55K | £1.1M | £451K | 16 |
| 30 Sep 2023 | £490K | £10K | £1M | £526K | 14 |
| 30 Sep 2022 | £520K | £162K | £1.5M | £922K | 20 |
| 30 Sep 2021 | £519K | £335K | £1.6M | £1.1M | 24 |
| 30 Sep 2020 | £270K | £356K | £1.2M | £944K | 27 |
| 30 Sep 2019 | £385K | £182K | £1M | £677K | 27 |
| 30 Sep 2018 | £544K | £331K | £1.6M | £1.1M | |
| 30 Sep 2017 | £688K | £492K | £1.3M | £624K | |
| 30 Sep 2016 | £488K | £323K | £962K | £498K |
Who runs and owns S.E.C. Electrical Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (3)
| Name | Role | Appointed |
|---|---|---|
| C*** S*** | Director | Oct 2008 |
| G*** G*** | Director | Jul 2020 |
| L*** K*** | Director | Jun 2025 |
9 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| M*** B*** | Secretary | Jul 2004 | Jun 2020 |
| M*** R*** | Secretary | Jul 2004 | |
| M*** B*** | Director | Jul 2004 | Jun 2020 |
| J*** M*** | Director | Jul 2004 | |
| S*** N*** | Director | Jul 2020 | Apr 2021 |
| J*** R*** | Director | Jul 2004 | |
| M*** R*** | Director | Jul 2004 | |
| A*** S*** | Director | Oct 2008 | Jun 2020 |
| I*** S*** | Director | Jun 2022 |
People with significant control (2)
Where S.E.C. Electrical Limited is registered
The registered office is in Northampton (NN5), in the West Northamptonshire local authority area, East Midlands. Show NN5 5JP on a map.
Other trade companies in NN5
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- Aetoj LtdMachinery repair and installation
- Base2Build LtdBuilders
- Osadrew Services LtdCleaning companies
- SK Corex LtdProperty developers
- Avv Carpentry LimitedJoiners and carpenters
What happens if S.E.C. Electrical 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 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 00558175
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 December 1955 (70 years ago)
- Registered office
- 48 ST. James Mill Road, Northampton, NN5 5JP
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 20 May 2026
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 Northampton
Other active electrical contractors registered in Northampton.
- Saints Electrical & Security Ltd2011
- Savu Mma Ltd2017
- Shelton Electrical Services Limited2006
- Simat Aerials Limited2003
- Simon Sweetland Ltd2005
- Smart Electrical Northants Ltd2022
- Solarcore Energy Ltd2026
- ST Electrics Ltd2016
All electrical contractors in Northampton · All trades in Northampton · Electricians across the UK
Frequently asked questions
When are S.E.C. Electrical Limited's accounts due?
S.E.C. Electrical Limited's next accounts are due at Companies House by 30 June 2027 (in 261 days), covering the period to 30 September 2026.
When is S.E.C. Electrical Limited's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is S.E.C. Electrical Limited still trading?
S.E.C. Electrical 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 S.E.C. Electrical Limited do?
S.E.C. Electrical Limited is registered under Electrical installation (SIC 43210).
How old is S.E.C. Electrical Limited?
S.E.C. Electrical Limited was incorporated on 3 December 1955, 70 years ago.
Who runs S.E.C. Electrical Limited?
S.E.C. Electrical Limited has 3 active directors, the longest-serving appointed in Oct 2008. Their names and service addresses are on the Companies House register.
Who owns S.E.C. Electrical Limited?
2 people or companies have significant control of S.E.C. Electrical Limited: an individual (owns 25% to 50% of the shares); an individual (owns 25% to 50% of the shares).
What is the penalty if S.E.C. Electrical 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 S.E.C. Electrical 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.