- Companies
- Electricians
- Portsmouth
- Detection Fire & Security Ltd
Detection Fire & Security Ltd
- Company number
- 13299935
- Incorporated
- 29 Mar 20215 years trading
- Registered office
- 8 Spur Road, Cosham, Portsmouth, PO6 3EB
- Nature of business
- Electrical installation
Detection Fire & Security Ltd is a 5-year-old private limited company registered in Portsmouth, company number 13299935, one of 148 electrical contractors in Portsmouth. 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 up £60K (+73.2%) on the year before, to £142K.
- Net assets rose in 3 of 3 year-on-year comparisons on record.
- Current assets of £175K against £76K owed within a year: 2.3 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 4 years, 2022 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Apr 2025 | £142K | £175K | £76K | 3 | |
| 30 Apr 2024 | £82K | £137K | £72K | 3 | |
| 30 Apr 2023 | £52K | £84K | £55K | 3 | |
| 30 Apr 2022 | £15K | £57K | £38K | 2 |
Where Detection Fire & Security Ltd is registered
The registered office is in Portsmouth (PO6), in the Portsmouth local authority area, South East. Show PO6 3EB on a map.
Other trade companies in PO6
- Bellagio Partners LtdBuilders
- Cpenw LtdMachinery repair and installation
- Marla Brickwork & Construction LtdProperty developers
- Miracles in Metal LtdMechanics and garages
- FH Fire & Electrical LtdElectricians
- Thomcore LimitedSpecialist contractors
- JMS Southern LtdElectricians
- The Motum Group LtdSpecialist contractors
Shared registered office
142 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Detection Fire & Security 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 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
- 13299935
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 March 2021 (5 years ago)
- Registered office
- 8 Spur Road, Cosham, Portsmouth, PO6 3EB
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 30 April (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 28 March 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 Portsmouth
Other active electrical contractors registered in Portsmouth.
- Diverse Contracting Ltd2014
- Drexon Electrical Ltd2024
- Duke Electrical Services Ltd2013
- Dynamic Electrical Services South Limited2013
- Eco Electrical Solutions Southern Limited2019
- Electrical Safety and Renewables Ltd2025
- Elephant Renewables Ltd2024
- Emeraldec Ltd2025
All electrical contractors in Portsmouth · All trades in Portsmouth · Electricians across the UK
Frequently asked questions
When are Detection Fire & Security Ltd's accounts due?
Detection Fire & Security Ltd's next accounts are due at Companies House by 31 January 2027 (in 111 days), covering the period to 30 April 2026.
When is Detection Fire & Security Ltd'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 Detection Fire & Security Ltd still trading?
Detection Fire & Security 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 Detection Fire & Security Ltd do?
Detection Fire & Security Ltd is registered under Electrical installation (SIC 43210).
How old is Detection Fire & Security Ltd?
Detection Fire & Security Ltd was incorporated on 29 March 2021, 5 years ago.
What is the penalty if Detection Fire & Security 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 Detection Fire & Security 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.